WO2023185356A1 - Network selection method and network selection apparatus - Google Patents

Network selection method and network selection apparatus Download PDF

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Publication number
WO2023185356A1
WO2023185356A1 PCT/CN2023/078735 CN2023078735W WO2023185356A1 WO 2023185356 A1 WO2023185356 A1 WO 2023185356A1 CN 2023078735 W CN2023078735 W CN 2023078735W WO 2023185356 A1 WO2023185356 A1 WO 2023185356A1
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WO
WIPO (PCT)
Prior art keywords
vplmn
hplmn
slices
terminal device
nssai
Prior art date
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PCT/CN2023/078735
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French (fr)
Chinese (zh)
Inventor
朱方园
李岩
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华为技术有限公司
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Publication of WO2023185356A1 publication Critical patent/WO2023185356A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0893—Assignment of logical groups to network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

Definitions

  • the present application relates to the field of communications, and more specifically, to a network selection method and a network selection device.
  • the terminal device can access a visited PLMN (VPLMN) according to the configured public land mobile network (PLMN) network selection priority.
  • PLMN public land mobile network
  • the terminal device configures the network selection
  • the policy is that VPLMN-1 has a higher priority than VPLMN-2, so the terminal device can access VPLMN-1 with a higher priority.
  • Network slicing is introduced in the fifth generation mobile communication technology (5G) to ensure the quality of service (QoS) requirements of different businesses.
  • 5G fifth generation mobile communication technology
  • QoS quality of service
  • a terminal device accesses a VPLMN according to the configured PLMN network selection priority
  • the VPLMN it accesses may not be deployed with the network slice requested by the terminal device, causing the service requirements of the terminal device not to be met.
  • This application provides a method and device for determining network selection, which is conducive to meeting the business needs of terminal equipment and improving user experience.
  • a network selection method is provided, applied to a first VPLMN.
  • the method includes: receiving a first message from a terminal device, the first message is used to request access to the first VPLMN, and the first message includes the terminal device requesting access to the first VPLMN.
  • the terminal is sent to the unified data management (unified data management, UDM) network element of the home public land mobile communication network (home PLMN, HPLMN).
  • unified data management unified data management
  • the network selection priority of the second VPLMN is received from the UDM network element.
  • the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  • the slices supported by the second VPLMN include one or more slices that are identical to one or more slices of the HPLMN. Slices of mapping relationships. Send the network selection priority of the second VPLMN to the terminal device.
  • one or more slices requested by the terminal device to access the first VPLMN may be called requested NSSAI (Requested NSSAI), and the information of one or more slices of HPLMN may be called requested Mapping of NSSAI (mapping of Requested NSSAI).
  • requested NSSAI Requested NSSAI
  • requested Mapping of NSSAI mapping of Requested NSSAI
  • the first VPLMN determines that it cannot support at least one of the slices requested by the terminal device to access.
  • the first VPLMN may send the location information of the terminal device and the information of one or more slices of the HPLMN to the UDM network element of the HPLMN (hereinafter referred to as the HPLMN UDM) to request the HPLMN to find a terminal device that can support the terminal device.
  • the HPLMN UDM UDM network element of the HPLMN
  • Other VPLMNs requesting access to all slices.
  • the second VPLMN is the determined VPLMN that can support all slices requested to be accessed by the terminal device.
  • the first VPLMN can send the network selection priority of the second VPLMN to the terminal device.
  • the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  • the terminal device can preferentially access the second VPLMN according to the network selection priority. VPLMN.
  • the second VPLMN found by the network for the terminal device can support all slices requested by the terminal device. Therefore, the network can meet the business needs of the terminal device to a greater extent, which is beneficial to improving the user experience.
  • the method further includes: sending first indication information to the HPLMN UDM, where the first indication information is used to indicate updating the network selection priority.
  • Receiving the network selection priority of the second VPLMN from HPLMN UDM includes: receiving the updated network selection priority from HPLMN UDM.
  • the updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than that of the first VPLMN. The network selection priority.
  • the first VPLMN sends the first instruction information to the HPLMN UDM.
  • the first instruction information can trigger the HPLMN UDM to adjust the network selection priority of the VPLMN.
  • the HPLMN UDM can adjust the network selection priority of the second VPLMN.
  • the network selection priority is higher than the network selection priority of the first VPLMN.
  • sending the first indication information to the HPLMN UDM includes: when it is determined that the first VPLMN does not support at least one of the slices requested by the terminal device to access, sending the first indication information to the HPLMN UDM.
  • HPLMN UDM sends the first indication information.
  • the first VPLMN does not support at least one of the slices to which the terminal device requests access, which is a condition that triggers the first VPLMN to send the first indication information.
  • the first VPLMN supports all slices that the terminal device requests to access, then the first VPLMN does not need to instruct the HPLMN to reselect other VPLMNs.
  • the first message further includes second indication information, and the second indication information is used to indicate if the first VPLMN does not support at least one of the slices that the terminal device requests to access. , for the terminal device to find information about other VPLMNs that support all slices that the terminal device requests access to.
  • the terminal device may include second indication information in the first message sent to the first VPLMN.
  • the first VPLMN may determine that the terminal device desires to access a network that can support the terminal device request. All slices of other VPLMN.
  • the second indication information also indicates that the first VPLMN needs to return the found information of other VPLMNs to the terminal device.
  • the method further includes: the first VPLMN determines whether there are slices that the first VPLMN does not support in one or more slices that the terminal device requests to access.
  • the method further includes: the first VPLMN obtains the location information of the terminal device.
  • a network selection method is provided, applied to the first VPLMN.
  • the method includes: receiving a first message from a terminal device, the first message is used to request access to the first VPLMN, and the first message includes the terminal device requesting access to the first VPLMN.
  • One or more slices accessed by the first VPLMN are sent to the HPLMN UDM.
  • Information of at least one candidate VPLMN and information of slices of the HPLMN having a mapping relationship with slices supported by each candidate VPLMN in the at least one candidate VPLMN are received from the HPLMN UDM.
  • Information about the second VPLMN is received from the terminal device, where the second VPLMN is one of at least one candidate VPLMN.
  • One or more slices of the HPLMN have a mapping relationship with one or more slices that the terminal device requests to access in the first VPLMN.
  • the slices of the HPLMN that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN include some slices of the HPLMN that have a mapping relationship with the slices that the terminal device requests to access in the first VPLMN.
  • the first VPLMN when the first VPLMN determines that it cannot support at least one of the slices requested by the terminal device to access, the first VPLMN can send the location information of the terminal device and the information of one or more slices of the HPLMN to the HPLMN UDM. , to request the HPLMN to find other VPLMNs for the terminal device that can support all slices that the terminal device requests to access.
  • the first VPLMN may send information about at least one candidate VPLMN and information about slices supported by each candidate VPLMN in the at least one candidate VPLMN to the terminal device, and the terminal device decides which candidate VPLMN among the at least one candidate VPLMN it wants to access.
  • the selected candidate VPLMN is the second VPLMN.
  • the network does not find a VPLMN that can support all the slices requested by the terminal device
  • the network returns information about the slices supported by each candidate VPLMN in at least one candidate VPLMN to the terminal device, and the terminal device determines the second VPLMN, And notify HPLMN UDM to update the network selection priority of the second VPLMN. Since the second VPLMN is determined by the terminal device, it can support the slices that the terminal device expects to access. This will help meet the business needs of the terminal device and improve the user experience of the terminal device. .
  • the method further includes: receiving the network selection priority of the second VPLMN from the HPLMN UDM, and the second VPLMN's network selection priority.
  • the network selection priority is higher than the network selection priority of the first VPLMN. Send the network selection priority of the second VPLMN to the terminal device.
  • the method further includes: sending first indication information to the HPLMN UDM, where the first indication information is used to indicate updating the network selection priority.
  • Receiving the network selection priority of the second VPLMN from HPLMN UDM includes: receiving the updated network selection priority from HPLMN UDM.
  • the updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than that of the first VPLMN. The network selection priority.
  • sending the first indication information to the HPLMN UDM includes: when it is determined that the first VPLMN does not support at least one of the slices requested for access, sending to the UDM the first indication information.
  • the first message further includes second indication information, and the second indication information is used to indicate if the first VPLMN does not support at least one of the slices that the terminal device requests to access. , for the terminal device to find information about other VPLMNs that support all slices that the terminal device requests access to.
  • the method further includes: receiving a network selection priority of the second VPLMN from the HPLMN UDM, where the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  • the method further includes: sending a third message to the terminal device, the third message carrying the network selection priority of the second VPLMN.
  • the third message is a downlink (downlink, DL) non-access stratum (non-access stratum, NAS) transmission message.
  • DL downlink
  • NAS non-access stratum
  • a network selection method is provided, applied to HPLMN UDM.
  • the method includes: receiving location information of the terminal device and information of one or more slices of the HPLMN from the first VPLMN.
  • the NSSF receives the information of the second VPLMN from the HPLMN, and the slices supported by the second VPLMN include slices that respectively have a mapping relationship with one or more slices of the HPLMN.
  • One or more slices of the HPLMN have a mapping relationship with one or more slices that the terminal device requests to access in the first VPLMN.
  • the HPLMN UDM can send the received information to the HPLMN NSSF, and the HPLMN NSSF will find the terminal device that can support the terminal device request. All slices of other VPLMN.
  • the second VPLMN can support all slices requested by the terminal device.
  • the HPLMN UDM can send the network selection priority of the second VPLMN to the terminal device through the first VPLMN, where the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  • the second VPLMN found by the network for the terminal device can support all slices requested by the terminal device. Therefore, the network meets the business requirements of the terminal device to a greater extent, which is beneficial to improving the user experience.
  • the method further includes: receiving first indication information from the first VPLMN, where the first indication information is used to indicate updating the network selection priority.
  • Sending the network selection priority of the second VPLMN to the first VPLMN includes: sending an updated network selection priority to the first VPLMN.
  • the updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than that of the first VPLMN.
  • the HPLMN UDM determines to adjust the network selection priority of the second VPLMN to be higher than the network selection priority of the first VPLMN.
  • the network selection priority of the first VPLMN is higher than the network selection priority of the second VPLMN.
  • the information of the second VPLMN may include the identification of the second VPLMN, and the information of the second VPLMN may instruct the HPLMN UDM to adjust the network selection priority of the second VPLMN to be higher than the network selection priority of the first VPLMN.
  • a network selection method is provided, applied to HPLMN UDM.
  • the method includes: receiving location information of the terminal device and information of one or more slices of the HPLMN from the first VPLMN. Send the location information of the terminal device and the information of one or more slices of HPLMN to the HPLMN NSSF.
  • Information of at least one candidate VPLMN and information of slices of HPLMNs that have a mapping relationship with slices supported by each candidate VPLMN in the at least one candidate VPLMN are received from the NSSF.
  • Information about at least one candidate VPLMN and information about slices of the HPLMN having a mapping relationship with slices supported by each candidate VPLMN are sent to the first VPLMN.
  • Information about the second VPLMN is received from the first VPLMN, and the second VPLMN is one of at least one candidate VPLMN.
  • one or more slices of the HPLMN have a mapping relationship with one or more slices that the terminal device requests to access in the first VPLMN.
  • the slices of the HPLMN that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN include some slices of the HPLMN that have a mapping relationship with the slices that the terminal device requests to access in the first VPLMN.
  • HPLMN UDM after receiving the location information of the terminal device and the information of one or more slices of HPLMN, HPLMN UDM can send the received information to HPLMN NSSF, and the HPLMN NSSF will find for the terminal device a request that can support the terminal device. All slices of other VPLMN.
  • HPLMN UDM received to After the information of one candidate VPLMN and the information of the slices supported by each candidate VPLMN in the at least one candidate VPLMN are lost, the information of the slices supported by each candidate VPLMN in the at least one candidate VPLMN can be sent to the terminal device through the first VPLMN, and the terminal device Decide which candidate VPLMN among the at least one candidate VPLMN you want to access, and the candidate VPLMN selected by the terminal device is the second VPLMN.
  • Each of the at least one candidate VPLMN supports partial slices requested by the terminal device.
  • the second VPLMN may support partial slices requested by the terminal device.
  • the network does not find a VPLMN that can support all the slices requested by the terminal device
  • the network returns information about the slices supported by each candidate VPLMN in at least one candidate VPLMN to the terminal device, and the terminal device determines the second VPLMN, And notify the HPLMN UDM to update the network selection priority of the second VPLMN. Since the second VPLMN is determined by the terminal device, the second VPLMN can support the slices that the terminal device expects to use. This will help meet the business needs of the terminal device and improve the performance of the terminal device. Use experience.
  • the method further includes: sending the network selection priority of the second VPLMN to the first VPLMN, and the second VPLMN The network selection priority of the VPLMN is higher than the network selection priority of the first VPLMN.
  • the method further includes: receiving first indication information from the first VPLMN, where the first indication information is used to indicate updating the network selection priority.
  • Sending the network selection priority of the second VPLMN to the first VPLMN includes: sending an updated network selection priority to the first VPLMN.
  • the updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than that of the first VPLMN.
  • a network selection method is provided, which is applied to the NSSF network element of HPLMN (hereinafter referred to as HPLMN NSSF).
  • the method includes: receiving the location information of the terminal device and the information of one or more slices of HPLMN from the HPLMN UDM. , wherein one or more slices of the HPLMN have a mapping relationship with one or more slices that the terminal device requests to access in the first VPLMN. Based on the location information of the terminal device and the information of one or more slices of the HPLMN, a candidate VPLMN is determined.
  • the HPLMN NSSF can determine a candidate VPLMN for the terminal device based on the location information of the terminal device and the information of one or more slices of the HPLMN.
  • the candidate VPLMN can support all slices or part of the slices requested by the terminal device, where, with The slices of the HPLMN that have a mapping relationship with the slices supported by the candidate VPLMN include some slices of the HPLMN that have a mapping relationship with the slices that the terminal device requests to access in the first VPLMN.
  • the number of candidate VPLMNs is at least one.
  • the candidate VPLMN can support all slices requested by the end device.
  • the candidate VPLMN in this case may correspond to the second VPLMN described in the first and third aspects above.
  • the candidate VPLMN may support partial slices requested by the terminal device.
  • the candidate VPLMN may correspond to at least one candidate VPLMN described in the above second and fourth aspects.
  • the second VPLMN described in the four aspects is one of the at least one candidate VPLMN.
  • determining the candidate VPLMN includes: sending a second message to the NSSF network element of one or more other VPLMNs, where the second message is used to request one or more other VPLMNs.
  • Information about each other slice supported by the VPLMN. Receives information from one or more other VPLMNs for each slice supported by the other VPLMN.
  • the slice of the HPLMN that has a mapping relationship with the slices supported in the one or more other VPLMNs includes a portion that has a mapping relationship with the slice that the terminal device requests to access in the first VPLMN.
  • the sliced VPLMN of the HPLMN is determined as the candidate VPLMN.
  • the HPLMN NSSF can obtain information about the slices deployed by each other VPLMN at the location of the terminal device by interacting with the NSSF network elements of one or more other VPLMNs, and then the HPLMN NSSF can obtain the slice information supported by each other VPLMN based on The mapping relationship between the slice and one or more slices of the HPLMN determines the candidate VPLMN.
  • the slices supported by each other VPLMN include slices that respectively have a mapping relationship with one or more slices of the HPLMN.
  • the slices supported by each other VPLMN that interacts with the HPLMN NSSF include slices that have mapping relationships with one or more slices of the HPLMN respectively, which is beneficial to reducing the number of other VPLMNs interacting with the HPLMN NSSF, thereby benefiting Reduce signaling overhead.
  • the method further includes: when the candidate VPLMN supports all slices in one or more slices of the HPLMN at the location of the terminal device, sending the candidate VPLMN to the HPLMN UDM. information.
  • the candidate VPLMN corresponds to the second VPLMN described in the first and third aspects above, and the slices supported by the candidate VPLMN at the location of the terminal device respectively have a mapping relationship with one or more slices of the HPLMN, where the candidate VPLMN
  • the information may include the identification of the candidate VPLMN.
  • the information of the candidate VPLMN may instruct the HPLMN UDM to adjust the network selection priority of the candidate VPLMN to be higher than the network selection priority of the first VPLMN, so that the terminal device can access the second VPLMN according to the network selection priority. Meet the business needs of terminal equipment to a greater extent.
  • the method further includes: when the candidate VPLMN supports some of the one or more slices of the HPLMN at the location of the terminal device, sending the candidate VPLMN to the HPLMN UDM. information and information about the slices supported by the candidate VPLMN.
  • the candidate VPLMN corresponds to at least one candidate VPLMN described in the above second and fourth aspects
  • the slices supported by the at least one candidate VPLMN at the location of the terminal device have mappings with some of the one or more slices of the HPLMN.
  • the HPLMN NSSF may send the at least one candidate VPLMN and the slice information supported by each candidate VPLMN in the at least one candidate VPLMN to the terminal device through the HPLMN UDM and the first VPLMN, so that the terminal device selects from the at least one candidate VPLMN including The second VPLMN of the slice that the terminal device wants to access can meet the service needs of the terminal device to a greater extent.
  • a network selection method is provided, applied to a terminal device.
  • the method includes: sending a first message to the first VPLMN, the first message is used to request access to the first VPLMN, and the first message includes the terminal device requesting access to the first VPLMN.
  • Information of at least one candidate VPLMN and information of slices of the HPLMN having a mapping relationship with slices supported by each candidate VPLMN in the at least one candidate VPLMN are received from the first VPLMN.
  • a second VPLMN is determined from at least one candidate VPLMN. Send the information of the second VPLMN to the first VPLMN to request updating of the network selection priority of the second VPLMN.
  • each candidate VPLMN supports partial slices requested by the terminal device.
  • the slices of the HPLMN that have a mapping relationship with the slices supported by the candidate VPLMN include some slices of the HPLMN that have a mapping relationship with the slices that the terminal device requests to access in the first VPLMN.
  • the terminal device can access the slice according to the desired Determine supported slice inclusion periods from at least one candidate VPLMN
  • the second VPLMN of the slice desired to access and sends the information of the second VPLMN to the HPLMN UDM through the first VPLMN.
  • the information of the second VPLMN can instruct the HPLMN UDM to adjust the network selection priority of the second VPLMN to be higher than that of the first VPLMN. network priority. This will help the terminal device access the desired slice and meet the business needs of the terminal device.
  • determining the second VPLMN from at least one candidate VPLMN includes: determining the second VPLMN from at least one candidate VPLMN according to the user's service requirements.
  • a third message is received from the first VPLMN, and the third message carries the network selection priority of the second VPLMN.
  • the first message further includes second indication information, and the second indication information is used to indicate if the first VPLMN does not support at least one of the slices that the terminal device requests to access. , for the terminal device to find information about other VPLMNs that support all slices that the terminal device requests access to.
  • a network selection method is provided, which is applied to a terminal device.
  • the method includes: sending a first message to the first VPLMN, where the first message is used to request access to the first VPLMN, and the first message includes whether the terminal device is connected to the first VPLMN.
  • a VPLMN requests access to one or more slices.
  • the first message is also used to indicate that if the first VPLMN does not support at least one of the slices that the terminal device requests to access, find other slices for the terminal device that support all the slices that the terminal device requests to access. VPLMN information.
  • the first message may instruct the network to find information for the terminal device on other VPLMNs that support all slices that the terminal device requests access to.
  • the network can search for information about other VPLMNs that support all slices that the terminal device requests to access based on the first message, This will help improve the possibility of all slices accessed by the terminal device, meet the business needs of the terminal device to a greater extent, and improve the user experience.
  • a network selection device including: a transceiver module and a determination module.
  • the transceiver module is configured to: receive a first message from the terminal device, the first message is used to request access to the first VPLMN, and the first message includes one or more slices that the terminal device requests to access in the first VPLMN.
  • the determination module is used to: determine whether all slices requested to be accessed by the terminal device are supported.
  • the transceiver module is also used to: when at least one of the slices requested by the terminal device to access is not supported, send the location information of the terminal device and the information of one or more slices of the HPLMN to the HPLMN UDM, where one or more slices of the HPLMN Multiple slices have a mapping relationship with one or more slices requested by the terminal device to access the first VPLMN; the network selection priority of the second VPLMN is received from the HPLMN UDM, and the network selection priority of the second VPLMN is higher than the first
  • the network selection priority of the VPLMN, the slices supported by the second VPLMN include slices that respectively have a mapping relationship with one or more slices of the HPLMN; and the network selection priority of the second VPLMN is sent to the terminal device.
  • the transceiver module is configured to: send first indication information to HPLMN UDM, where the first indication information is used to indicate updating the network selection priority; and, receive updates from HPLMN UDM
  • the updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  • the transceiver module is configured to: send the first indication to the UDM when it is determined that at least one of the slices requested by the terminal device to access is not supported. information.
  • the first message further includes second indication information, and the second The indication information is used to indicate that if the first VPLMN does not support at least one of the slices that the terminal device requests to access, find for the terminal device information about other VPLMNs that support all slices that the terminal device requests to access.
  • a network selection device including: a transceiver module and a determination module.
  • the transceiver module is configured to: receive a first message from the terminal device, the first message is used to request access to the first VPLMN, and the first message includes one or more slices that the terminal device requests to access in the first VPLMN.
  • the determination module is used to: determine whether all slices requested to be accessed by the terminal device are supported.
  • the transceiver module is also used to: when at least one of the slices requested by the terminal device to access is not supported, send the location information of the terminal device and the information of one or more slices of the HPLMN to the HPLMN UDM, where one or more slices of the HPLMN Multiple slices have a mapping relationship with one or more slices requested by the terminal device to access the first VPLMN; information of at least one candidate VPLMN is received from the HPLMN UDM and has a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN Information about the slices of the HPLMN.
  • the slices of the HPLMN that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN include part of the slice that the terminal device requested in the first.
  • a slice of a VPLMN accessed by a slice of an HPLMN with a mapping relationship; sending information of at least one candidate VPLMN and information of a slice of the HPLMN that has a mapping relationship with a slice supported by each candidate VPLMN to the terminal device; receiving a second VPLMN from the terminal device information that the second VPLMN is one of at least one candidate VPLMN; and, sending the information of the second VPLMN to the HPLMN UDM to request an update of the network selection priority of the second VPLMN.
  • the transceiver module is used to: receive the network selection priority of the second VPLMN from the HPLMN UDM, and the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN priority; and, sending the network selection priority of the second VPLMN to the terminal device.
  • sending first indication information to HPLMN UDM the first indication information is used to indicate updating the network selection priority; and receiving the updated network selection priority from HPLMN UDM level, the updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  • the first indication information is sent to the HPLMN UDM.
  • the first message further includes second indication information, and the second indication information is used to indicate if the first VPLMN does not support at least one of the slices that the terminal device requests to access. , for the terminal device to find information about other VPLMNs that support all slices that the terminal device requests access to.
  • a network selection device including: a transceiver module and a determination module.
  • the transceiver module is configured to: receive the location information of the terminal device and the information of one or more slices of the HPLMN from the first VPLMN, where the one or more slices of the HPLMN are related to the one or more slices that the terminal device requests to access in the first VPLMN.
  • Multiple slices have a mapping relationship; send the location information of the terminal device and the information of one or more slices of the HPLMN to the HPLMN NSSF; receive the information of the second VPLMN from the HPLMN NSSF, and the slices supported by the second VPLMN include one or more slices respectively with the HPLMN Multiple slices have a mapping relationship; the determination module is used to: determine the network selection priority of the second VPLMN.
  • the transceiver module is also configured to: send the network selection priority of the second VPLMN to the first VPLMN, and the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  • the transceiver module is configured to: receive first indication information from the first VPLMN, where the first indication information is used to indicate updating the network selection priority; and, to the first VPLMN Send the updated network selection priority.
  • the updated network selection priority is used to indicate that the second VPLMN has a higher network selection priority than the first. VPLMN network selection priority.
  • a network selection device including: a transceiver module and a determination module.
  • the transceiver module is configured to: receive the location information of the terminal device and the information of one or more slices of the HPLMN from the first VPLMN, where the one or more slices of the HPLMN are related to the one or more slices that the terminal device requests to access in the first VPLMN.
  • Multiple slices have a mapping relationship; send the location information of the terminal device and the information of one or more slices of the HPLMN to the HPLMN NSSF; receive the information of at least one candidate VPLMN and the information of at least one candidate VPLMN supported by each candidate VPLMN from the HPLMN NSSF Slice information of HPLMN slices that have a mapping relationship, in one or more slices that the terminal device requests access to, wherein the slices of the HPLMN that have a mapping relationship with the slices supported by each candidate VPLMN include part of the slices that the terminal device requests in the first slice.
  • the determining module is used to determine the network selection priority of the second VPLMN.
  • the transceiver module is configured to: send the network selection priority of the second VPLMN to the first VPLMN, and the network selection priority of the second VPLMN is higher than that of the first VPLMN.
  • the network selection priority is configured to: send the network selection priority of the second VPLMN to the first VPLMN, and the network selection priority of the second VPLMN is higher than that of the first VPLMN. The network selection priority.
  • the transceiver module is configured to: receive first indication information from the first VPLMN, where the first indication information is used to indicate updating the network selection priority; and, to the first VPLMN; The first VPLMN sends an updated network selection priority, and the updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  • a network selection device including: a transceiver module and a determination module.
  • the transceiver module is used for: HPLMN UDM receives the location information of the terminal device and the information of one or more slices of HPLMN, wherein the one or more slices of HPLMN are related to one or more slices of the first VPLMN requested by the terminal device. Slices have mapping relationships.
  • the determining module is configured to: determine the VPLMN based on the location information of the terminal device and the information of one or more slices of the HPLMN, wherein the slices of the HPLMN that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN include parts The slice of the HPLMN that has a mapping relationship with the slice that the terminal device requests to access in the first VPLMN.
  • the transceiver module is used to: send a second message to one or more other VPLMN NSSFs, and the second message is used to request the one or more other VPLMNs.
  • the determining module is configured to: determine the VPLMN of the slice of the HPLMN that has a mapping relationship with the slices supported in the one or more other VPLMNs, including a portion of the slice of the HPLMN that has a mapping relationship with the slice that the terminal device requests to access in the first VPLMN as Candidate VPLMN.
  • each other VPLMN-supported slice includes a slice that has a mapping relationship with one or more slices of the HPLMN.
  • the candidate VPLMN when the candidate VPLMN supports all slices in one or more slices of the HPLMN at the location of the terminal device, information of the candidate VPLMN is sent to the HPLMN UDM.
  • the candidate VPLMN when the candidate VPLMN is at the location of the terminal device, send the information of the candidate VPLMN and the information of the slices supported by the candidate VPLMN to the HPLMN UDM.
  • a network selection device including: a transceiver module and a determination module.
  • the transceiver module is configured to: send a first message to the first VPLMN, the first message is used to request access to the first VPLMN, and the first message includes one or more slices that the terminal device requests to access in the first VPLMN;
  • a VPLMN receives information of at least one candidate VPLMN and information of HPLMN slices that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN.
  • the slices of the HPLMN that have a mapping relationship with the slices supported by the candidate VPLMN include parts with the terminal.
  • the device requests an HPLMN slice that has a mapping relationship with the slice accessed by the first VPLMN.
  • the determining module is configured to: determine a second VPLMN from at least one candidate VPLMN.
  • the transceiver module is also used to: send the information of the second VPLMN to the first VPLMN to request to update the network selection priority of the second VPLMN.
  • the determining module is configured to: determine the second VPLMN from the at least one candidate VPLMN according to the user's service requirements.
  • the transceiver module is configured to: receive a third message from the first VPLMN, where the third message carries the network selection priority of the second VPLMN.
  • the first message further includes second indication information, and the second indication information is used to indicate if the first VPLMN does not support the slice in the slice requested by the terminal device to access. At least one, searching for the terminal device information of other VPLMNs that support all slices that the terminal device requests to access.
  • a network selection device including: a determination module and a transceiver module.
  • the determining module is configured to: determine a first message, the first message is used to request access to the first VPLMN, and the first message includes one or more slices that the terminal device requests access to in the first VPLMN.
  • the transceiver module is configured to: send the first message to the first VPLMN.
  • the first message is also used to indicate that if the first VPLMN does not support at least one of the slices that the terminal device requests to access, find information for the terminal device about other VPLMNs that support all slices that the terminal device requests to access.
  • another network selection device including a processor, which is coupled to a memory and can be used to execute instructions in the memory to implement the method in any of the possible implementation manners of any of the above aspects.
  • the device further includes memory.
  • the device further includes a communication interface, and the processor is coupled to the communication interface.
  • the network selection device is an AMF network element of the first VPLMN, a UDM network element of the HPLMN, an NSSF network element of the HPLMN, or a terminal device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the network selection device is a chip configured in the AMF network element of the first VPLMN, the UDM network element of the HPLMN, the NSSF network element of the HPLMN, or the terminal equipment.
  • the communication interface may be an input/output interface.
  • a processor including: an input circuit, an output circuit and a processing circuit.
  • the processing circuit is configured to receive signals through the input circuit and transmit signals through the output circuit, so that the processor performs the method in any of the possible implementations of any of the above aspects.
  • the above-mentioned processor can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be
  • the circuit is output to and transmitted by the transmitter, and the input circuit and the output circuit may be the same circuit, which is used as an input circuit and an output circuit respectively at different times.
  • This application does not limit the specific implementation methods of the processor and various circuits.
  • a processing device including a processor and a memory.
  • the processor is used to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter to execute the method in any of the possible implementations of any of the above aspects.
  • processors there are one or more processors and one or more memories.
  • the memory may be integrated with the processor, or the memory may be provided separately from the processor.
  • the memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated on the same chip as the processor, or can be set in different On the chip, this application does not limit the type of memory and the arrangement of the memory and the processor.
  • ROM read-only memory
  • sending instruction information may be a process of outputting instruction information from the processor
  • receiving capability information may be a process of the processor receiving input capability information.
  • the data output by the processing can be output to the transmitter, and the input data received by the processor can come from the receiver.
  • the transmitter and receiver can be collectively called a transceiver.
  • the processing device in the seventeenth aspect above can be a chip, and the processor can be implemented by hardware or software.
  • the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software
  • the processor can be a general-purpose processor, which is implemented by reading the software code stored in the memory.
  • the memory can be integrated in the processor, or can be located outside the processor and exist independently.
  • a computer program product includes: computer program code.
  • the computer program code When the computer program code is run, it causes the computer to execute the method in any of the possible implementation manners of any of the above aspects.
  • a computer-readable storage medium stores a computer program.
  • the computer program When the computer program is run, it causes the computer to execute any of the possible implementation methods of any of the above aspects. method.
  • Figure 1 is a schematic diagram of slice mapping in a roaming scenario
  • Figure 2 is a schematic diagram of a network architecture suitable for embodiments of the present application.
  • FIG. 3 is a schematic diagram of another network architecture suitable for embodiments of the present application.
  • Figure 4 is a schematic structural diagram of a terminal device applicable to the embodiment of the present application.
  • Figure 5 is a schematic flow chart of a network selection method provided by an embodiment of the present application.
  • Figure 6 is a schematic flow chart of another network selection method provided by an embodiment of the present application.
  • Figure 7 is a schematic flow chart of yet another network selection method provided by an embodiment of the present application.
  • Figure 8 is a schematic flow chart of yet another network selection method provided by an embodiment of the present application.
  • Figure 9 is a schematic block diagram of a network selection device provided by an embodiment of the present application.
  • Figure 10 is a schematic block diagram of another network selection device provided by an embodiment of the present application.
  • words such as “first” and “second” are used to distinguish the same or similar items with basically the same functions and effects.
  • the first PLMN and the second PLMN are used to distinguish different PLMNs
  • the first message and the second message are used to distinguish different messages, and their order is not limited.
  • words such as “first” and “second” do not limit the number and execution order
  • words such as “first” and “second” do not limit the number and execution order.
  • At least one means one or more
  • plural means two or more.
  • “And/or” describes the association of associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the related objects are in an “or” relationship.
  • “At least one of the following” or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items).
  • At least one of a, b and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c, where a, b, c can be single or multiple.
  • 5G network slicing technology provides isolated network environments for different application scenarios by virtualizing independent logical networks on the same network infrastructure, allowing different application scenarios to customize network functions and characteristics according to their own needs, and effectively guarantee the security of different services. QoS requirements.
  • the goal of 5G network slicing is to organically combine terminal equipment, access network resources, core network resources, and network operation and management systems to provide different business scenarios or business types with a complete and mutually isolated network that can be independently operated and maintained. network.
  • 3rd generation partnership project, 3GPP 3rd generation partnership project
  • 3GPP third generation mobile communication project
  • 3GPP third generation mobile communication project
  • network slices should not affect each other. For example, a sudden large number of meter reading services should not affect normal mobile broadband services.
  • relatively independent management and operation and maintenance between businesses are required, and tailor-made business functions and analysis capabilities are provided. Instances of different types of services are deployed on different network slices, and different instances of the same service type can also be deployed on different network slices.
  • the network slice selection process When the core network deploys network slicing, the network slice selection process will be triggered when a user initially attaches to the network.
  • Parameters that need to be considered in the network slicing selection process include: user subscription data, local configuration information, roaming agreements, operator policies, etc. Taking the above parameters into consideration, the appropriate slicing type can be selected for the terminal device.
  • network slicing may be referred to as slice for short.
  • S- NSSAI Single network slice selection assistance information
  • S-NSSAI includes slice type/service type (SST) and slice differentiator (SD).
  • SST is used to describe the characteristics and service characteristics of network slices; SD is used to distinguish features with Different network slices of the same SST features.
  • Network slice selection assistance information is a set of S-NSSAI used to identify multiple network slices.
  • the terminal device can provide the NSSAI consisting of a set of parameters to the core network to enable the core network to select a network slicing instance for the terminal device.
  • NSSAI can be a standardized value or a specific value within the PLMN.
  • NSSAI in the 5G network can be configured NSSAI (configured NSSAI), requested NSSAI (requested NSSAI) or allowed NSSAI (allowed NSSAI).
  • the terminal device can provide the requested NSSAI to the core network, which is used by the core network to select a network slice instance for the terminal device.
  • the radio access network sends an initial network access request message to the core network based on the requested NSSAI (Requested NSSAI) carried by the terminal device in the radio resource control (RRC) layer.
  • RRC radio resource control
  • the current PLMN After the terminal device is attached to the current PLMN in the core network, the current PLMN makes a comprehensive judgment based on the terminal device's subscription data, roaming agreement, local configuration and other information, and returns the NSSAI allowed by the current PLMN to the terminal device through the registration acceptance message, using When the subsequent terminal device initiates a service request, the allowed NSSAI is sent to the core network.
  • the configured NSSAI and/or allowed NSSAI under each PLMN is stored in the terminal device.
  • the configured NSSAI is configured in the terminal device before interacting with the PLMN. This value is a default NSSAI configured on the terminal device and can be used when the terminal device initially accesses the network in the PLMN.
  • a mobility management (MM) process such as a mobility registration update process, can be triggered through the network to update the allowed NSSAI stored locally in the terminal device.
  • the S-NSSAI deployed by different VPLMNs (hereinafter referred to as VPLMN S-NSSAI) and the S-NSSAI deployed by HPLMN (hereinafter referred to as There will be different mapping relationships between HPLMN S-NSSAI).
  • the registration request message carries the requested NSSAI (Requested NSSAI).
  • it can also carry the characteristics of each S-NSSAI in the requested NSSAI (Requested NSSAI).
  • HPLMN S-NSSAI mapping of Requested NSSAI
  • FIG. 1 is a schematic diagram of slice mapping in a roaming scenario.
  • HPLMN, VPLMN-1 and VPLMN-2 are three different PLMNs.
  • VPLMN-1 S-NSSAI is an enhanced mobile broadband (eMBB) slice deployed in VPLMN-1
  • HPLMN S-NSSAI is the ultra-reliable low latency communication (URLLC) slice deployed in HPLMN
  • VPLMN-2 S-NSSAI is the vehicle to everything (V2X) slice deployed in VPLMN-2 .
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable low latency communication
  • V2X vehicle to everything
  • VPLMN-1 S-NSSAI and HPLMN S-NSSAI have mapping relationship 1 (mapping-1).
  • mapping-1 mapping-1
  • the terminal device can learn that it only needs to request access to the eMBB slice in VPLMN-1.
  • the registration request message includes VPLMN-1 S-NSSAI.
  • the registration request message also includes the value between VPLMN-1 S-NSSAI and HPLMN S-NSSAI Mapping relationship 1.
  • VPLMN-2 S-NSSAI and HPLMN S-NSSAI have mapping relationship 2 (mapping-2).
  • mapping-2 mapping-2
  • the terminal device wants to access the service corresponding to the URLLC slice in VPLMN-2, because VPLMN-2 does not deploy the URLLC slice but according to the mapping In relation 2, the terminal device can learn and request access to the V2X slice in VPLMN-2. Therefore, when the terminal device initiates a registration request in VPLMN-2, the requested NSSAI (Requested NSSAI) carried includes VPLMN-2 S-NSSAI.
  • the registration request message also includes the mapping relationship 2 between VPLMN-2 S-NSSAI and HPLMN S-NSSAI.
  • the network selection policy configured on the terminal device side is that the network selection priority of VPLMN-1 is higher than the network selection priority of VPLMN-2, and VPLMN-1 deploys network slice 1 (as shown in Figure 1 URLLC slice), VPLMN-2 deploys network slice 2 (V2X slice in Figure 1), and the terminal device wants to access network slice 2 at the current location.
  • the terminal device accesses VPLMN-1 according to the network selection priority, but VPLMN-1 does not deploy the network slice 2 that the terminal device wants to access, and cannot provide services corresponding to network slice 2 for the terminal device.
  • mapping can also be performed between the same slices in the roaming scenario.
  • HPLMN, VPLMN-1 and VPLMN-2 all deploy eMBB slices but use different slice identifiers to identify the eMBB slices.
  • HPLMN S-NSSAI#1 is used to identify the eMBB slice deployed by HPLMN
  • VPLMN-1 S-NSSAI#2 is used to identify the eMBB slice deployed by VPLMN-1
  • VPLMN-2 S-NSSAI#3 is used to identify VPLMN- 2 deployed eMBB slice
  • HPLMN S-NSSAI#1 and VPLMN-1 S-NSSAI#2 have mapping relationship 1
  • HPLMN S-NSSAI#1 and VPLMN-2 S-NSSAI#3 have mapping relationship 2.
  • embodiments of the present application provide a network selection method and a network selection device.
  • a terminal device roams to a visited location, and there are multiple VPLMN networks at the location of the terminal device.
  • the multiple VPLMNs select according to the PLMN.
  • the network priority is sorted.
  • the terminal device can select the VPLMN that meets the network access conditions in the order of PLMN network selection priority.
  • the terminal device can first determine that the first VPLMN among multiple VPLMNs meets the network access conditions according to the preset order of PLMN network selection priorities, and request access to the first VPLMN.
  • the network may search for a VPLMN for the terminal device that can support the network slice requested by the terminal device (called the second VPLMN) based on the network slice requested by the terminal device.
  • the second VPLMN deploys the network slice requested by the terminal device in the first VPLMN at the location of the terminal device, and the network adjusts the network selection priority of the second VPLMN and sends the adjusted network selection priority of the second VPLMN to the terminal device, where the adjusted network selection priority of the second VPLMN is higher than that of the first VPLMN, so that the terminal device can determine whether to access the second VPLMN with a higher priority than the first VPLMN, thereby accessing
  • the network slice requested by the terminal device is conducive to meeting the business needs of the terminal device.
  • the terminal device determines that the first VPLMN accessed does not deploy the network slice requested by the terminal device according to the preset PLMN network selection priority order, causing the terminal's service experience to be affected.
  • This application implements In the example method, the second VPLMN determined by the network deploys the network slice requested by the terminal device at the location of the terminal device. In this way, after the terminal device chooses to access the second VPLMN, it is conducive to successfully accessing the network slice requested by the terminal device, improving Terminal device user experience.
  • the technical solution provided by this application can be applied to various communication systems, such as: 5G mobile communication system or new radio access technology (new radio access technology, NR).
  • the 5G mobile communication system may include non-independent groups Networking (non-standalone, NSA) and/or independent networking (standalone, SA).
  • the technical solution provided by this application can also be applied to machine type communication (MTC), long-term evolution technology for machine-to-machine communication (Long Term Evolution-machine, LTE-M), and device to device (device to device, D2D) networks , machine to machine (M2M) network, Internet of things (IoT) network or other networks.
  • the IoT network may include, for example, the Internet of Vehicles.
  • the communication methods in the Internet of Vehicles system are collectively called vehicle to other devices (vehicle to X, V2X, X can represent anything).
  • the V2X can include: vehicle to vehicle (vehicle to vehicle, V2V) communication.
  • FIG 2 is a schematic diagram of a network architecture suitable for embodiments of the present application.
  • the network architecture is a 5G network architecture based on service-oriented architecture.
  • the network architecture can include user equipment (user equipment, UE), data network (data network, DN), wireless access network (access network, RAN) and core network (core network, CN).
  • the core network can include the following network elements: network slice selection function (NSSF) network element, network exposure function (NEF) network element, and network storage function (Network Repository Function, NRF) network element , policy control function (PCF) network element, unified data management (UDM) network element, application function (AF) network element, access and mobility management function (access and mobility management) function, AMF) network element, session management function (SMF) network element, network slice-specific authentication and authorization function (NSSAAF) network element, authentication server function, AUSF) network element, service communication proxy (SCP) network element, Network Slice Admission Control Function (NSACF) network element, user plane function (UPF) network element.
  • NSSF network slice selection function
  • NRF Network Exposure Function
  • PCF Policy Control function
  • UDM unified data management
  • AF application function
  • AF access and mobility management function
  • AMF session management function
  • SMF network slice-specific authentication and authorization function
  • SCP service communication proxy
  • NSACF Network Slice Admission Control Function
  • UPF user plane
  • Figure 3 is a schematic diagram of another network architecture suitable for embodiments of the present application.
  • the network architecture is a 5G network architecture based on point-to-point interfaces.
  • the network architecture can include UE, data network, radio access network and core network.
  • the core network may include the following network elements: NSSF network element, AUSF network element, NSSAAF network element, UDM network element, NSACF network element, AMF network element, SMF network element, PCF network element, and AF network element.
  • 5G network architecture shown in Figures 2 and 3 can also include more network elements, which are not shown here.
  • the RAN shown in Figure 2 or Figure 3 can be used to implement wireless-related functions, and the DN can be used to provide data transmission services for the UE.
  • the data network can be a public data network (PDN) network, such as the Internet, or a local access data network (LADN), such as mobile edge computing (MEC) ) node network; it can also be a third-party business network, IP multi-media service network, etc.
  • PDN public data network
  • LADN local access data network
  • MEC mobile edge computing
  • AMF network element Responsible for user mobility management, including mobility status management, assigning user temporary identities, authenticating and authorizing users.
  • UDM network element Responsible for managing contract data and notifying the corresponding network element when the contract data is modified.
  • NSSF network element responsible for the selection of network slicing.
  • SMF network element responsible for user plane (UP) network element selection, UP network element reselection, Internet protocol (internet protocol, IP) address allocation, session establishment, modification and release, quality of service (quality of service, QoS) control.
  • UP user plane
  • IP Internet protocol
  • QoS quality of service
  • AUSF network element Mainly responsible for network security, used to generate keys, implement two-way authentication for UE, and implement 3GPP and non-3GPP access authentication.
  • NEF network element Open the capabilities of each network element, convert internal and external information, and be used in edge computing scenarios.
  • PCF network element mainly used to manage policy rules, manage user subscription information, etc.
  • UDR Stores and retrieves contract data, policy data, public architecture data, etc. for UDM, PCF and NEF to obtain relevant data.
  • UDR can have different data access authentication mechanisms for different types of data, such as contract data and policy data, to ensure the security of data access.
  • UDR must be able to return failure responses carrying appropriate cause values for illegal service operations or data access requests.
  • NRF network element responsible for the registration and discovery functions of network elements, and maintaining network element information, such as the instance identification, type, PLMN, slice-related identification, IP address or fully qualified domain name of the network element. name, FQDN), the network element’s capabilities, supported services, etc.
  • AF network element Mainly used to send application-influenced data routing information to the network, and interact with the policy framework through network open function network elements to perform policy control, etc.
  • UPF network element interconnects PDU sessions with data networks, packet routing and forwarding, and data packet inspection.
  • network elements included in the above-mentioned core network can be independent devices, or can be integrated into the same device to implement different functions. This application does not limit the specific form of the above-mentioned network elements.
  • the terminal device in the embodiment of the present application can be a handheld device, a vehicle-mounted device, etc. with a wireless connection function.
  • the terminal device can also be called a terminal (terminal), user equipment (UE), mobile station (MS) ), mobile terminal (mobile terminal, MT), etc.
  • terminal devices are: mobile phones, tablets, smart TVs, laptops, tablets (Pad), PDAs, mobile internet devices (MID), virtual reality, VR) equipment, augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, smart Wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, conversations session initiation protocol, SIP) telephone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, vehicle-mounted device , wearable devices, terminal equipment in the 5G network or terminal equipment in the future evolved public land mobile communication network (public land mobile network, PLMN), etc.
  • the embodiments of this application apply specific technologies and specific equipment to the terminal equipment. The form is not limited.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices. It is a general term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes, etc.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones.
  • the terminal device may be a device for realizing the function of the terminal device, or a device that can support the terminal device to realize the function, such as a chip system, and the device may be installed in the terminal.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the terminal equipment in the embodiment of this application may also be called: user equipment (UE), mobile station (MS), mobile terminal (mobile terminal, MT), access terminal, user unit, user station, Mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device, etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • access terminal user unit, user station, Mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device, etc.
  • FIG. 4 is a schematic structural diagram of a terminal device applicable to the embodiment of the present application.
  • the terminal device 400 may include: a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, and a power management module 141.
  • Battery 142 antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, headphone interface 170D, sensor 180, button 190, motor 191, indicator 192, camera 193, display screen 194, and subscriber identification module (subscriber identification module, SIM) card interface 195, etc.
  • SIM subscriber identification module
  • the processor 110 may include one or more processing units.
  • the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processing unit (GPU), and an image signal processor. (image signal processor, ISP), controller, video codec, digital signal processor (DSP), baseband processor, display process unit (DPU), and/or neural network processor (neural-network processing unit, NPU), etc.
  • different processing units can be independent devices or integrated in one or more processors.
  • the terminal device 400 may also include one or more processors 110.
  • the processor may be the nerve center and command center of the terminal device 400 .
  • the processor can generate operation control signals based on the instruction opcode and timing signals to complete the control of fetching and executing instructions.
  • the processor 110 may also be provided with a memory for storing instructions and data.
  • the memory in processor 110 is a cache memory.
  • the memory may hold instructions or data used or recycled by processor 110 . If the processor 110 needs to use the instructions or data again, it can be called directly from the memory. This avoids repeated access and reduces the waiting time of the processor 110, thereby improving the efficiency of the terminal device 400.
  • processor 110 may include one or more interfaces.
  • Interfaces may include integrated circuit (inter-integrated circuit, I2C) interface, integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, pulse code modulation (pulse code modulation, PCM) interface, universal asynchronous receiver and transmitter (universal asynchronous receiver/transmitter (UART) interface, mobile industry processor interface (MIPI), general-purpose input/output (GPIO) interface, subscriber identity module (SIM) interface, and/or USB interface, etc.
  • the USB interface 130 is an interface that complies with USB standard specifications, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc.
  • the USB interface 130 can be used to connect a charger to charge the terminal device 400, and can also be used to transmit data between the terminal device 400 and peripheral devices. It can also be used to connect headphones to play audio through them.
  • the interface connection relationships between the modules illustrated in the embodiment of the present application are schematic illustrations and do not constitute a structural limitation on the terminal device 400 .
  • the terminal device 400 may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.
  • the wireless communication function of the terminal device 400 can be implemented through the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modem processor and the baseband processor.
  • Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals.
  • Each antenna in terminal device 400 may be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization. For example: Antenna 1 can be reused as a diversity antenna for a wireless LAN. In other embodiments, antennas may be used in conjunction with tuning switches.
  • the mobile communication module 150 can provide wireless communication solutions including 2G/3G/4G/5G applied to the terminal device 400.
  • the mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier, etc.
  • the mobile communication module 150 can receive electromagnetic waves through the antenna 1, perform filtering, amplification and other processing on the received electromagnetic waves, and transmit them to the modem processor for demodulation.
  • the mobile communication module 150 can also amplify the signal modulated by the modem processor and convert it into electromagnetic waves through the antenna 1 for radiation.
  • at least part of the functional modules of the mobile communication module 150 may be disposed in the processor 110 .
  • at least part of the functional modules of the mobile communication module 150 and at least part of the modules of the processor 110 may be provided in the same device.
  • a modem processor may include a modulator and a demodulator.
  • the modulator is used to modulate the low-frequency baseband signal to be sent into a medium-high frequency signal.
  • the demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal.
  • the demodulator then transmits the demodulated low-frequency baseband signal to the baseband processor for processing.
  • the application processor outputs sound signals through audio devices (not limited to speaker 170A, receiver 170B, etc.), or displays images or videos through display screen 194.
  • the modem processor may be a stand-alone device.
  • the modem processor may be independent of the processor 110 and may be provided in the same device as the mobile communication module 150 or other functional modules.
  • the wireless communication module 160 can provide applications on the terminal device 400 including wireless local area networks (WLAN), Bluetooth, global navigation satellite system (GNSS), frequency modulation (FM), NFC, Infrared technology (infrared, IR) and other wireless communication solutions.
  • the wireless communication module 160 may be one or more devices integrating at least one communication processing module.
  • wireless communication module Block 160 receives the electromagnetic wave via the antenna 2 , frequency modulates and filters the electromagnetic wave signal, and sends the processed signal to the processor 110 .
  • the wireless communication module 160 can also receive the signal sent from the processor 110, frequency modulate it, amplify it, and convert it into electromagnetic waves through the antenna 2 for radiation.
  • the antenna 1 of the terminal device 400 is coupled to the mobile communication module 150, and the antenna 2 is coupled to the wireless communication module 160, so that the terminal device 400 can communicate with the network and other devices through wireless communication technology.
  • the wireless communication technology may include GSM, GPRS, CDMA, WCDMA, TD-SCDMA, LTE, GNSS, WLAN, NFC, FM, and/or IR technology, etc.
  • the above-mentioned GNSS can include global positioning system (GPS), global navigation satellite system (GLONASS), Beidou navigation satellite system (BDS), quasi-zenith satellite system (quasi) -zenith satellite system (QZSS) and/or satellite based augmentation systems (SBAS).
  • GPS global positioning system
  • GLONASS global navigation satellite system
  • BDS Beidou navigation satellite system
  • QZSS quasi-zenith satellite system
  • SBAS satellite based augmentation systems
  • the sensors 180 may include a pressure sensor 180A, a gyro sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, and an ambient light sensor 180L. , bone conduction sensor 180M, etc.
  • Figure 5 is a schematic flow chart of a network selection method 500 provided by an embodiment of the present application.
  • the method 500 can be applied to the network architecture shown in Figure 2 or Figure 3, but this is not limited in the embodiment of the present application.
  • Method 500 includes the following steps:
  • the terminal device sends the first message to the AMF network element in the first VPLMN (hereinafter referred to as the first VPLMN AMF). Accordingly, the first VPLMN AMF receives the first message.
  • the first message is used to request access to the first VPLMN.
  • the first message includes the NSSAI (Requested NSSAI) requested by the terminal device.
  • the requested NSSAI includes one or more S-NSSAI.
  • the S-NSSAI is used to identify the slice of the first VPLMN. That is, one or more S-NSSAIs contained in the first message may identify one or more slices that the terminal device requests to access in the first VPLMN.
  • the first message also includes the mapping of the requested NSSAI (mapping of Requested NSSAI).
  • the mapping of the requested NSSAI refers to each S-NSSAI and HPLMN S in the requested NSSAI. -Mapping relationship between NSSAI.
  • HPLMN is the home PLMN of the terminal device, and HPLMN S-NSSAI is used to identify the slice of HPLMN deployment.
  • the mapping of the requested NSSAI is used to indicate that the terminal device requests in the first VPLMN
  • One or more slices of the access have a mapping relationship with one or more slices of the HPLMN.
  • the terminal device expects to access HPLMN S-NSSAI-A, HPLMN S-NSSAI-B, and HPLMN S-NSSAI-C based on business requirements. However, because the terminal device is in roaming state and is located in the VPLMN, the terminal device determines the VPLMN based on the configuration information.
  • S-NSSAI-1 and HPLMN S-NSSAI-A have a mapping relationship
  • VPLMN S-NSSAI-2 and HPLMN S-NSSAI-B have a mapping relationship
  • VPLMN S-NSSAI-3 and HPLMN S-NSSAI-C have a mapping relationship.
  • the terminal device can send the requested NSSAI (Requested NSSAI) and the mapping of the requested NSSAI (mapping of Requested NSSAI) to the first VPLMN AMF, where the requested NSSAI (Requested NSSAI) includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3, the mapping of requested NSSAI includes HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C.
  • the requested NSSAI includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3
  • the mapping of requested NSSAI includes HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C.
  • VPLMN does not deploy HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C are respectively identified slices, but are deployed with HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C.
  • Each slice has a mapping relationship, so the terminal device carries the mapping relationship in the first message to tell the first VPLMN AMF which slice the terminal device expects to access.
  • the first VPLMN is the VPLMN that the terminal device requests access to in a roaming scenario, and may also be called a serving VPLMN.
  • the terminal device may request to access the first VPLMN according to the preconfigured PLMN network selection priority.
  • One or more S-NSSAIs contained in the requested NSSAI correspond to the first VPLMN S-NSSAI.
  • the first message is a registration request message initiated by the terminal device in the first VPLMN.
  • the first message may also include second indication information.
  • the second indication information is used to indicate that if the first VPLMN does not support the slice requested by the terminal device to access, that is, the first VPLMN does not support the requested NSSAI (Requested NSSAI).
  • At least one S-NSSAI in the network searches for information about other VPLMNs that support all slices that the terminal device requests to access. That is, the terminal device expects that the slices supported by the VPLMN found by the network include mapping relationships with the requested NSSAI.
  • Requested NSSAI contains HPLMN S-NSSAI slices with mapping relationships.
  • the first VPLMN AMF After the first VPLMN AMF receives the second indication information, the first VPLMN determines to search for other VPLMNs for the terminal device, and the first VPLMN AMF returns the information of the found other VPLMNs to the terminal device. In this way, the second indication information can trigger the first VPLMN AMF to use the HPLMN NSSF to find supported slices for the terminal device as much as possible, including slices that have a mapping relationship with the HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI). other VPLMNs in order to meet the business needs of terminal devices as much as possible.
  • the first VPLMN AMF sends the location information of the terminal device and the information of one or more slices of the HPLMN to the HPLMN UDM.
  • the UDM receives the location information of the terminal device and the information of one or more slices of the HPLMN.
  • the method for the first VPLMN AMF to determine the information of one or more slices of the HPLMN may be:
  • the terminal device carries the requested NSSAI (Requested NSSAI) in the first message and Mapping of Requested NSSAI.
  • the mapping of the requested NSSAI refers to the HPLMN S-NSSAI that has a mapping relationship with each S-NSSAI in the requested NSSAI (Requested NSSAI), which can be understood as the mapping of the requested NSSAI.
  • the relationship contains the HPLMN S-NSSAI that has a mapping relationship with each S-NSSAI in the requested NSSAI (Requested NSSAI).
  • the first VPLMN AMF will be associated with each S-NSSAI in the requested NSSAI (Requested NSSAI).
  • S-NSSAI HPLMN S-NSSAI with mapping relationship is sent to HPLMN UDM.
  • the first VPLMN AMF determines that it does not support at least one of the slices requested by the terminal device to access, that is, the first VPLMN does not support at least one of the requested NSSAI (Requested NSSAI)
  • the first VPLMN AMF can determine whether the terminal device is in the first slice.
  • the mapping of the requested NSSAI carried in the message determines the HPLMN S-NSSAIs, that is, the information that determines one or more slices of the HPLMN.
  • mapping of requested NSSAI can be pre-configured on the terminal device.
  • the terminal device may obtain the mapping relationship (mapping of Requested NSSAI) from the first VPLMN AMF.
  • the mapping relationship between the requested NSSAI (Requested NSSAI) and the requested NSSAI (mapping of Requested NSSAI) is as shown in Table 1 below.
  • the requested NSSAI includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3.
  • VPLMN S-NSSAI-1 and HPLMN S-NSSAI-A have a mapping relationship
  • VPLMN S-NSSAI -2 has a mapping relationship with HPLMN S-NSSAI-B
  • VPLMN S-NSSAI-3 has a mapping relationship with HPLMN S-NSSAI-C.
  • the first VPLMN AMF may send HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C to HPLMN UDM, that is, the information of one or more slices of HPLMN in S502 refers to HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C.
  • the terminal device carries the requested NSSAI (Requested NSSAI) in the first message, that is, the first message in S501 does not carry the mapping of the requested NSSAI (mapping of Requested NSSAI).
  • the first VPLMN AMF determines that it does not support at least one of the slices requested by the terminal device to access, that is, the first VPLMN does not support at least one of the requested NSSAI (Requested NSSAI)
  • the first VPLMN AMF can determine whether the terminal device is in the first slice.
  • the requested NSSAI carried in the message and the roaming agreement between the first VPLMN and HPLMN determine the mapping relationship (mapping of Requested NSSAI) of the requested NSSAI, that is, it is determined that each S-NSSAI in the requested NSSAI (Requested NSSAI) has a mapping.
  • the HPLMN S-NSSAI of the relationship is the information of one or more slices of HPLMN.
  • the roaming agreement between the first VPLMN and the HPLMN includes the mapping relationship between the first VPLMN S-NSSAI and the HPLMN S-NSSAI.
  • the roaming agreement between the first VPLMN and HPLMN is pre-configured in the first VPLMN, and the roaming agreement between the first VPLMN and HPLMN includes the mapping relationship between the first VPLMN S-NSSAI and HPLMN S-NSSAI ( As shown in table 2).
  • the terminal device carries the requested NSSAI (Requested NSSAI) in the first message, where the requested NSSAI (Requested NSSAI) includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3.
  • the first VPLMN AMF is based on the mapping relationship between the first VPLMN S-NSSAI and HPLMN S-NSSAI (as shown in Table 2) Determine that VPLMN S-NSSAI-1 and HPLMN S-NSSAI-A have a mapping relationship, VPLMN S-NSSAI-2 and HPLMN S-NSSAI-B have a mapping relationship, VPLMN S-NSSAI-3 and HPLMN S-NSSAI-C have a mapping relationship relation.
  • the first VPLMN AMF can send HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C to HPLMN UDM, that is, the information of one or more slices of HPLMN in S502 refers to HPLMN S-NSSAI-A, HPLMN S-NSSAI-B, and HPLMN S-NSSAI-C.
  • the meaning of the information of one or more slices of HPLMN in the above description can also be replaced by HPLMN S-NSSAI or requested HPLMN S-NSSAI that has a mapping relationship with each S-NSSAI in the requested NSSAI (Requested NSSAI).
  • Mapping of NSSAI mapping of Requested NSSAI.
  • the following will represent the information of one or more slices of HPLMN in terms of the mapping of Requested NSSAI.
  • the first VPLMN AMF determines that it does not support at least one of the slices that the terminal device requests to access, that is, the first VPLMN cannot support all the slices that the terminal device requests to access. In this scenario, the first VPLMN AMF can try to find information for the terminal device through HPLMN about other VPLMNs that can support all slices requested for access.
  • the first VPLMN AMF determines whether there are slices that the first VPLMN does not support in one or more slices that the terminal device requests to access.
  • the first VPLMN AMF can determine whether there is a slice that the first VPLMN does not support based on the location information of the terminal device and the network slice information contracted by the terminal device.
  • the terminal device can send the requested NSSAI (Requested NSSAI) and the mapping of the requested NSSAI (mapping of Requested NSSAI) to the first VPLMN AMF, where the requested NSSAI (Requested NSSAI) includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3.
  • the requested NSSAI includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3.
  • the first VPLMN AMF determines that VPLMN S-NSSAI-1 with a mapping relationship with HPLMN S-NSSAI-A is deployed at the location of the terminal device, and HPLMN S-NSSAI-1 NSSAI-B has VPLMN S-NSSAI-2 that has a mapping relationship, but VPLMN S-NSSAI-3 that has a mapping relationship with HPLMN S-NSSAI-C is not deployed.
  • the first VPLMN only supports VPLMN S-NSSAI-1 and VPLMN S-NSSAI-2 that have mapping relationships with HPLMN S-NSSAI-A and HPLMN S-NSSAI-B, and cannot support mapping with HPLMN S-NSSAI-C. Relationship of VPLMN S-NSSAI-3.
  • the first VPLMN AMF determines that the first VPLMN does not support the slice requested by the terminal device to access, that is, the first VPLMN does not support at least one S-NSSAI in the requested NSSAI (Requested NSSAI), it may send the first S-NSSAI to the HPLMN UDM.
  • Instruction information the first instruction information is used to instruct HPLMN UDM to update the network selection priority. It should be understood that the first VPLMN does not support at least one of the slices requested by the terminal device to access, that is, the first VPLMN does not support at least one of the requested NSSAI (Requested NSSAI) S-NSSAI to trigger the first VPLMN to send the first indication information. conditions of.
  • the first VPLMN AMF can accept the access request of the terminal device according to the first message. Then instruct HPLMN to select another VPLMN again.
  • the first indication information may instruct the HPLMN UDM to update the network selection priority by updating roaming guidance (steering of roaming, SOR) information.
  • roaming guidance steering of roaming, SOR
  • the first VPLMN AMF may combine the first indication information, the location information of the terminal device and the requested The mapping of NSSAI (mapping of Requested NSSAI) is encapsulated in the same message and sent to the HPLMN UDM.
  • the first indication information may also be sent to the HPLMN UDM as a separate message. This is not limited in the embodiment of the present application.
  • the first VPLMN AMF may first send the mapping relationship (mapping of Requested NSSAI) between the location information of the terminal device and the requested NSSAI to the HPLMN UDM through S502, and then send the first indication information to the HPLMN UDM through other messages separately.
  • mapping relationship mapping of Requested NSSAI
  • the first VPLMN AMF receives the second indication information from the terminal device, and determines that it is necessary to find other VPLMNs for the terminal device based on the second indication information.
  • the second indication information may be carried in the first message.
  • the location information of the terminal device sent by the first VPLMN AMF to the HPLMN UDM may be the physical location of the terminal device.
  • the first VPLMN AMF may identify the tracking area according to the current location of the terminal device ( tracking area identifier (TAI) determines the physical location corresponding to the TAI, where the corresponding relationship between the TAI and the physical area can be preconfigured in the first VPLMN.
  • TAI tracking area identifier
  • the first VPLMN AMF can send a location request message to a location management function (LMF) network element to trigger the LMF network element to locate the terminal device and obtain the physical location of the terminal device.
  • LMF location management function
  • the positioning process of the terminal device by LMF can refer to the existing implementation method, and will not be described in detail here.
  • the location information of the terminal device is used by the HPLMN to determine whether other VPLMNs have deployed slices with mapping relationships between the HPLMN S-NSSAI and the requested NSSAI (mapping of Requested NSSAI) at the location of the terminal device.
  • the first VPLMN AMF sends the terminal device's UDM to the HPLMN UDM.
  • Location information and information of one or more slices of VPLMN where the information of one or more slices of VPLMN refers to the information of one or more slices that the terminal device requests to access in the first VPLMN, that is, the requested NSSAI ( Requested NSSAI).
  • the HPLMN UDM receives the location information of the terminal device and the information of one or more slices of the VPLMN.
  • the first VPLMN AMF does not need to determine the HPLMN S-NSSAI (i.e. mapping of Requested NSSAI).
  • the first VPLMN AMF directly sends the requested NSSAI (Requested NSSAI) to the HPLMN UDM, and then the HPLMN UDM.
  • the roaming agreement between the first VPLMN and HPLMN (as shown in Table 2) further determines the HPLMN S-NSSAI that has a mapping relationship with each S-NSSAI in the requested NSSAI (Requested NSSAI), that is, one or more slices of HPLMN Information (mapping of Requested NSSAI).
  • the roaming agreement between the first VPLMN and HPLMN includes the mapping relationship between the first VPLMN S-NSSAI and HPLMN S-NSSAI.
  • the terminal device carries the requested NSSAI (Requested NSSAI) in the first message, where the requested NSSAI (Requested NSSAI) includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3.
  • the first VPLMN AMF may transfer the requested NSSAI (Requested NSSAI, that is, VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN in Table 1 S-NSSAI-3) is sent to the UDM network element of HPLMN.
  • the UDM network element of HPLMN is based on the mapping relationship between the first VPLMN S-NSSAI and HPLMN S-NSSAI (as shown in Table 2) It is determined that VPLMN S-NSSAI-1 and HPLMN S-NSSAI-A have a mapping relationship, VPLMN S-NSSAI-2 and HPLMN S-NSSAI-B have a mapping relationship, VPLMN S-NSSAI-3 and HPLMN S-NSSAI-C have a mapping relationship Mapping relations. Then HPLMN UDM can determine HPLMN S-NSSAIs, that is, the information of one or more slices of HPLMN according to the mapping relationship.
  • HPLMN UDM sends the mapping relationship (mapping of Requested NSSAI) between the location information of the terminal device and the requested NSSAI to HPLMN NSSF.
  • the NSSF network element receives the mapping relationship (mapping of Requested NSSAI) between the location information of the terminal device and the requested NSSAI.
  • the HPLMN NSSF determines the candidate VPLMN based on the mapping relationship (mapping of Requested NSSAI) between the location information of the terminal device and the requested NSSAI.
  • the number of candidate VPLMNs is at least one, including the following two situations:
  • Case 1 The number of candidate VPLMN is at least one, and the candidate VPLMN supports all HPLMN S-NSSAI slices with mapping relationships included in the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device, or It is understood that the slice deployed by the candidate VPLMN at the location of the terminal device can be mapped with all HPLMN S-NSSAI included in the mapping of Requested NSSAI. In this case, the candidate VPLMN can be determined as the second VPLMN.
  • the network selection method for case 1 will be introduced below with reference to Figure 6.
  • the mapping of requested NSSAI includes HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C.
  • the slices supported by the candidate VPLMN at the location of the terminal device include: slice N1, slice N2 and slice N3.
  • slice N1, slice N2 and slice N3 are all slices identified by the candidate PLMN S-NSSAI, and the candidate VPLMN S-NSSAI-N1 It is used to identify slice N1, candidate VPLMN S-NSSAI-N2 is used to identify slice N2, and candidate VPLMN S-NSSAI-N3 is used to identify slice N3.
  • candidate VPLMN S-NSSAI-N1 has a mapping relationship with HPLMN S-NSSAI-A
  • candidate VPLMN S-NSSAI-N2 has a mapping relationship with HPLMN S-NSSAI-B
  • candidate VPLMN S-NSSAI-N3 has a mapping relationship with HPLMN S-NSSAI -C has a mapping relationship, that is, the HPLMN slices that have a mapping relationship with the slices supported by the candidate VPLMN include HPLMN S-NSSAI-A, HPLMN S-NSSAI-B, and HPLMN S-NSSAI-C, that is, the candidate VPLMN is located where the terminal device is The location supports all HPLMN S-NSSAI slices that have a mapping relationship with the mapping of the requested NSSAI.
  • the candidate VPLMN may also support other slices at the location of the terminal device, which is not limited by this application.
  • mapping of Requested NSSAI there are multiple candidate VPLMNs that support slices with mapping relationships for all HPLMN S-NSSAIs contained in the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device.
  • the HPLMN NSSF can determine any one of the multiple candidate VPLMNs as the second VPLMN, and send the second VPLMN information to the HPLMN UDM to instruct the HPLMN UDM to adjust the network selection of the second VPLMN.
  • the priority is higher than the network selection priority of the first VPLMN.
  • the HPLMN NSSF may send information identifying the multiple candidate VPLMNs as the second VPLMN and send the second VPLMN information to the HPLMN UDM to instruct the HPLMN UDM to adjust the multiple second VPLMNs.
  • the network selection priority of the VPLMN is higher than the network selection priority of the first VPLMN.
  • Case 2 The number of candidate VPLMN is at least one, and the candidate VPLMN supports the mapping relationship with the requested NSSAI (mapping of Requested NSSAI) at the location of the terminal device.
  • Some HPLMN S-NSSAI slices that have a mapping relationship, or understand Therefore, the slice deployed by the candidate VPLMN at the location of the terminal device can be mapped with part of the HPLMN S-NSSAI included in the mapping of the requested NSSAI.
  • the terminal device can be used in at least one candidate
  • the second VPLMN is determined among the VPLMNs.
  • the network selection method for case 2 will be introduced below with reference to Figure 7.
  • the mapping of requested NSSAI includes HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C.
  • the candidate VPLMN includes candidate VPLMN#1, candidate VPLMN#2 and candidate VPLMN#3.
  • the slices supported by VPLMN#1 at the location of the terminal device include: slice B1 and slice B3.
  • the slices supported by candidate VPLMN#2 at the location of the terminal device include: slice C2 and slice C3.
  • the slices supported by the position include: slice D1 and slice D2.
  • candidate VPLMN#1 S-NSSAI-B1 is used to identify slice B1
  • candidate VPLMN#1 S-NSSAI-B3 is used to identify slice B3.
  • Candidate VPLMN#2 S-NSSAI-C2 is used to identify slice C2, and candidate VPLMN#2 S-NSSAI-C3 is used to identify slice C3.
  • Candidate VPLMN#3 S-NSSAI-D1 is used to identify slice D1, and candidate VPLMN#3 S-NSSAI-D2 is used to identify slice D2.
  • the S-NSSAI supported by candidate VPLMN and the mapping relationship between candidate VPLMN S-NSSAI and HPLMN S-NSSAI are shown in Table 3.
  • candidate VPLMN#1 S-NSSAI-B1 has a mapping relationship with HPLMN S-NSSAI-A
  • candidate VPLMN#1 S-NSSAI-B3 has a mapping relationship with HPLMN S-NSSAI-C, that is, with the candidate VPLMN#1 supported
  • the slice of HPLMN with mapping relationship includes HPLMN S-NSSAI-A and HPLMN S-NSSAI-C, excluding HPLMN S-NSSAI-B, that is, candidate VPLMN#1 supports the requested NSSAI at the location of the terminal device.
  • Some HPLMN S-NSSAI slices contained in the mapping relationship have mapping relationships.
  • candidate VPLMN#2 S-NSSAI-C2 has a mapping relationship with HPLMN S-NSSAI-B
  • candidate VPLMN#2 S-NSSAI-C3 has a mapping relationship with HPLMN S-NSSAI-C, that is, with the candidate VPLMN#2 supported Slices of HPLMN with mapping relationships include HPLMN S-NSSAI-B and HPLMN S-NSSAI-C, excluding HPLMN S-NSSAI-A. That is, the candidate VPLMN supports the mapping relationship with the requested NSSAI at the location of the terminal device.
  • Some HPLMN S-NSSAI slices contained in (mapping of Requested NSSAI) have mapping relationships.
  • candidate VPLMN#3 S-NSSAI-D1 has a mapping relationship with HPLMN S-NSSAI-A
  • candidate VPLMN#3 S-NSSAI-D2 has a mapping relationship with HPLMN S-NSSAI-B, that is, with the candidate VPLMN#3 supported
  • the slice of HPLMN with mapping relationship includes HPLMN S-NSSAI-A and HPLMN S-NSSAI-B, excluding HPLMN S-NSSAI-C, that is, the candidate VPLMN supports the mapping relationship with the requested NSSAI at the location of the terminal device.
  • Some HPLMN S-NSSAI slices contained in (mapping of Requested NSSAI) have mapping relationships.
  • the VPLMN whose final network selection priority is higher than the first VPLMN is called the second VPLMN.
  • the second VPLMN is determined by the HPLMN NSSF, and the second VPLMN can support slices that have a mapping relationship with all HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI) of the requested NSSAI.
  • the second VPLMN is determined by the terminal device, and the second VPLMN can support slices that have a mapping relationship with some HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI).
  • the terminal device wants to access the services corresponding to HPLMN S-NSSAI-A, HPLMN S-NSSAI-B, and HPLMN S-NSSAI-C
  • VPLMN S-NSSAI- 1 has a mapping relationship with HPLMN S-NSSAI-A
  • VPLMN S-NSSAI-2 has a mapping relationship with HPLMN S-NSSAI-B
  • VPLMN S-NSSAI-3 has a mapping relationship with HPLMN S-NSSAI-C
  • the terminal equipment You can request to access VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3 in the first VPLMN.
  • the first VPLMN AMF can determine the mapping relationship of the requested NSSAI that the terminal device actually wants to access based on the HPLMN S-NSSAI that has a mapping relationship with each S-NSSAI in the requested NSSAI (Requested NSSAI) ( mapping of Requested NSSAI).
  • the first VPLMN AMF can send the mapping of the requested NSSAI to the HPLMN NSSF through the HPLMN UDM, so that the HPLMN NSSF determines based on the location information of the terminal device and the mapping of the requested NSSAI.
  • HPLMN NSSF in S504 specifically determines the candidate VPLMN.
  • the HPLMN NSSF stores a roaming agreement, which indicates the mapping relationship between multiple different VPLMN deployed slices and HPLMN deployed slices. Combining the mapping relationships of different VPLMN and HPLMN slices described in Figure 1, it can be understood that the terminal device has a mapping relationship (mapping of Requested) between each S-NSSAI in the first VPLMN request (NSSAI Requested NSSAI) and the requested NSSAI respectively.
  • the HPLMN S-NSSAI in the NSSAI has a mapping relationship.
  • the first VPLMN AMF can send the mapping of the requested NSSAI to the HPLMN NSSF, so that the HPLMN NSSF determines which slices supported by the VPLMN include and The HPLMN S-NSSAI in the mapping of Requested NSSAI has a slice of the mapping relationship.
  • S504 may be specifically: the HPLMN NSSF sends a second message to the NSSF network elements of one or more other VPLMNs.
  • the second message includes the location information of the terminal device and the information of one or more slices of the HPLMN, that is, the mapping relationship of the requested NSSAI. (mapping of Requested NSSAI), the second message is used to request each NSSF in one or more other VPLMNs to determine whether a mapping relationship with the requested NSSAI (mapping of Requested NSSAI) is deployed at the location indicated by the location information of the terminal device.
  • the HPLMN NSSF receives the response message of the second message from the NSSF in the one or more other VPLMNs, where the The response message may indicate whether each of one or more other VPLMNs has deployed a slice with a mapping relationship with the HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI) at the location of the terminal device;
  • the HPLMN NSSF determines, based on the response message of the second message, which VPLMNs have deployed the HPLMN S-NSSAI slices contained in the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device, and assigns these VPLMN Identified as a candidate VPLMN.
  • the HPLMN NSSF interacts individually with each of the one or more other VPLMNs.
  • Each other VPLMN may send the information of the HPLMN's slice that has a mapping relationship with the slice supported at the location of the terminal device to the HPLMN NSSF, and the HPLMN NSSF sends the information of the HPLMN's slice based on the information received by each other VPLMN from one or multiple other VPLMNs to determine the candidate VPLMN.
  • the response message of the second message carries one or more slices.
  • HPLMN S-NSSAI wherein one or more HPLMN S-NSSAI carried in the response message of the second message belongs to the HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI) of the requested NSSAI, and the one or more HPLMN S-NSSAI
  • An HPLMN S-NSSAI is used to indicate an HPLMN NSSF: the VPLMN supports one or more slices that have a mapping relationship with the one or more HPLMN S-NSSAI. For example, if other VPLMN determines that no slice with a mapping relationship (mapping of Requested NSSAI) is deployed at the location of the terminal device, the response message of the second message will carry indication information. The indication The information is used to indicate HPLMN NSSF: This VPLMN does not support slices with a mapping relationship (mapping of Requested NSSAI) to the requested NSSAI.
  • the HPLMN NSSF determines which VPLMN deployed slices can be included in the mapping of the requested NSSAI (mapping of Requested NSSAI) based on the roaming agreement and the requested NSSAI.
  • HPLMN S-NSSAI has a mapping relationship. It can be understood that the roaming agreement can only determine which VPLMN deployed slices can have a mapping relationship with the HPLMN S-NSSAI included in the mapping of Requested NSSAI, but it cannot determine whether it is deployed at the location of the terminal. These slices.
  • the HPLMN NSSF determines that the VPLMN deploying the slice that has a mapping relationship with the HPLMN S-NSSAI contained in the mapping of Requested NSSAI is one or more other VPLMNs. Further, the HPLMN NSSF determines the candidate VPLMN based on the location information of the terminal device. Among them, the candidate VPLMN supports a slice with a mapping relationship with the HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI) at the location of the terminal device.
  • the mapping of requested NSSAI received by HPLMN NSSF from HPLMN UDM includes HPLMN S-NSSAI-A, HPLMN S-NSSAI-B, and HPLMN S-NSSAI-C. Which VPLMNs have roaming agreements with HPLMN pre-configured on the HPLMN NSSF.
  • the slices supported by VPLMN#1 include VPLMN#1 S-NSSAI-X1, VPLMN#1 S-NSSAI-X2 and VPLMN#1 S- NSSAI-X3, the slices supported by VPLMN#2 include VPLMN#2 S-NSSAI-Y1 and VPLMN#2 S-NSSAI-Y2, and the slices supported by VPLMN#3 include VPLMN#3 S-NSSAI-Z1.
  • mapping relationship between VPLMN#1 S-NSSAI and HPLMN S-NSSAI the mapping relationship between VPLMN#2 S-NSSAI and HPLMN S-NSSAI, the mapping relationship between VPLMN#3 S-NSSAI and HPLMN S-NSSAI
  • Table 4 the mapping relationship between VPLMN#1 S-NSSAI and HPLMN S-NSSAI.
  • the HPLMN NSSF sends a second message to VPLMN#1, VPLMN#2, and VPLMN#3 respectively.
  • the second message includes the location information of the terminal device and the mapping of the requested NSSAI (mapping of Requested NSSAI).
  • VPLMN#1 determines the mapping relationship (mapping of Requested NSSAI) between the VPLMN#1 S-NSSAI-X1 deployed at the location of the terminal device and the HPLMN S-NSSAI- A has a mapping relationship
  • the mapping relationship between VPLMN#1 S-NSSAI-X2 deployed at the location of the terminal device and the requested NSSAI (mapping of Requested NSSAI) contains HPLMN S-NSSAI-B, which has a mapping relationship
  • VPLMN#1 S -NSSAI-X3 has a mapping relationship with HPLMN S-NSSAI-C contained in the mapping of Requested NSSAI.
  • VPLMN#2 determines the mapping relationship (mapping of Requested NSSAI) between the VPLMN#2 S-NSSAI-Y1 deployed at the location of the terminal device and the HPLMN S-NSSAI included in the requested NSSAI.
  • -A has a mapping relationship.
  • the VPLMN#2 S-NSSAI-Y2 deployed at the location of the terminal device has a mapping relationship with the HPLMN S-NSSAI-B included in the mapping of Requested NSSAI (mapping of Requested NSSAI).
  • VPLMN#3 determines the mapping relationship (mapping of Requested NSSAI) between the VPLMN#3 S-NSSAI-Z1 deployed at the location of the terminal device and the HPLMN S-NSSAI contained in the requested NSSAI.
  • -A has a mapping relationship.
  • VPLMN #1 can send a response message of the second message to HPLMN NSSF, indicating that the slices supported by VPLMN #1 at the location of the terminal device are respectively the same as HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI.
  • -C has a mapping relationship.
  • VPLMN#2 may send a response message of the second message to HPLMN NSSF, indicating that the slices supported by VPLMN#2 at the location of the terminal device have mapping relationships with HPLMN S-NSSAI-A and HPLMN S-NSSAI-B respectively.
  • VPLMN#3 may send a response message of the second message to HPLMN NSSF, indicating that the slice supported by VPLMN#3 at the location of the terminal device has a mapping relationship with HPLMN S-NSSAI-A.
  • the HPLMN NSSF determines that the slices supported by VPLMN#1 at the location of the terminal device include the mapping relationship with the requested NSSAI (mapping of Requested NSSAI) contains all HPLMN S-NSSAI slices with mapping relationships. Determine that the slices supported by VPLMN#2 at the location of the terminal device include the HPLMN S-NSSAI-A contained in the mapping relationship (mapping of Requested NSSAI). A slice that has a mapping relationship with HPLMN S-NSSAI-B. The slice supported by VPLMN#3 at the location of the terminal device includes a mapping relationship with the requested NSSAI (mapping of Requested NSSAI) and contains a mapping relationship with HPLMN S-NSSAI-A. of slices.
  • VPLMN#1, VPLMN#2 and VPLMN#1 in VPLMN#3 that interact with HPLMN NSSF support the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device.
  • All HPLMN S-NSSAI contained slices have mapping relationships, so HPLMN NSSF can determine VPLMN#1 as a candidate VPLMN.
  • the HPLMN NSSF sends request messages to one or more other VPLMNs respectively.
  • the request messages carry the mapping relationship (mapping of Requested NSSAI) between the location information of the terminal device and the requested NSSAI. or multiple other VPLMNs send information about slices deployed at the location of the end device to the HPLMN NSSF.
  • the HPLMN NSSF deploys the HPLMN S contained in the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI based on the information of the slices deployed by one or more other VPLMNs at the location of the terminal device and the mapping of Requested NSSAI.
  • the VPLMN of the slice with NSSAI mapping relationship is determined as the candidate VPLMN.
  • the HPLMN NSSF can have a mapping relationship with one or more HPLMN S-NSSAIs contained in the mapping relationship (mapping of Requested NSSAI) of the VPLMN deployment without considering which slices deployed by the VPLMN can have a mapping relationship with the requested NSSAI.
  • Multiple other VPLMNs interact. That is, the slices deployed by one or more other VPLMNs that interact with the HPLMN NSSF do not necessarily have a mapping relationship with the HPLMN S-NSSAI contained in the mapping of the requested NSSAI.
  • HPLMN NSSF sends a second message to VPLMN#4.
  • the second message includes the mapping relationship (mapping of Requested NSSAI) between the location information of the terminal device and the requested NSSAI.
  • VPLMN#4 can determine the mapping relationship (mapping of Requested NSSAI) between the slice deployed at the location of the terminal device and the requested NSSAI based on the mapping of the requested NSSAI.
  • VPLMN#4 can send the response message of the second message to HPLMN NSSF.
  • the second message The response message of the message may indicate that none of the HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI) between the slice deployed by VPLMN#4 at the location of the terminal device and the requested NSSAI has a mapping relationship.
  • HPLMN NSSF receives the response message of VPLMN#4's second message and determines that none of the HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI) between the slice deployed by VPLMN#4 at the location of the terminal device and the requested NSSAI There is a mapping relationship, so HPLMN NSSF can exclude VPLMN#4 and determine candidate VPLMN from VPLMN#1, VPLMN#2, and VPLMN#3.
  • mapping relationship mapping of Requested NSSAI
  • the HPLMN NSSF can determine VPLMN#2 and VPLMN#3 For candidate VPLMN, VPLMN#2 and VPLMN#3 support the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device.
  • the partial HPLMN S- NSSAI has slices with mapping relationships.
  • FIG. 6 is a schematic diagram of a network selection method 600 provided by an embodiment of the present application.
  • the method 600 can be applied to the network architecture shown in Figure 2 or Figure 3.
  • the method 600 can include S601 to S607, where S601 to S604 are the same as the above. Steps S501 to S504 are similar.
  • the second VPLMN supports the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device, including All HPLMN S-NSSAI slices have mapping relationships.
  • mapping relationship mapping of Requested NSSAI
  • HPLMN NSSF sends the information of the second VPLMN to HPLMN UDM.
  • the slices supported by the second VPLMN include slices that have a mapping relationship with the requested NSSAI (mapping of Requested NSSAI).
  • the HPLMN UDM receives the information of the second VPLMN.
  • the HPLMN NSSF determines the second VPLMN
  • the HPLMN NSSF sends the information of the second VPLMN to the HPLMN UDM.
  • the information of the second VPLMN can trigger the HPLMN UDM to adjust the network selection priority of the second VPLMN.
  • the adjusted network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  • the information of the second VPLMN may include the identification of the second VPLMN.
  • the NSSAI (Requested NSSAI) requested by the terminal device at the first VPLMN includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3.
  • the first VPLMN is at the terminal device.
  • the location supports VPLMN S-NSSAI-1 and VPLMN S-NSSAI-2, but does not support VPLMN S-NSSAI-3.
  • the HPLMN NSSF determines that VPLMN#1 in Table 4 is the second VPLMN, and the HPLMN NSSF sends the information of VPLMN#1 to the HPLMN UDM.
  • the HPLMN UDM sends the network selection priority of the second VPLMN to the first VPLMN AMF.
  • the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  • the first VPLMN AMF receives the network selection priority of the second VPLMN.
  • method 600 also includes: the first VPLMN AMF sending first indication information to the HPLMN UDM, the first indication information being used to instruct the HPLMN UDM to update the PLMN network selection priority.
  • S606 includes: the HPLMN UDM sends the updated PLMN network selection priority to the first VPLMN AMF.
  • the updated PLMN network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  • the HPLMN UDM can carry the network selection priority of the second VPLMN through SOR information.
  • the first VPLMN AMF may send the first indication information to the HPLMN UDM, indicating that the HPLMN UDM needs to adjust the PLMN network selection priority. class.
  • HPLMN UDM After HPLMN UDM receives the information of VPLMN#1, it adjusts the network selection priority of VPLMN#1 to be higher than the network selection priority of the first VPLMN. After that, HPLMN UDM can pass the SOR information to carry the The SOR information of the network selection priority of VPLMN#1 is sent to the first VPLMN AMF. For example, the HPLMN UDM sends the network selection priority of VPLMN#1 to the first VPLMN AMF in the form of a priority list, and the priority list also includes the updated network selection priority of the first VPLMN.
  • the first VPLMN AMF sends the network selection priority of the second VPLMN to the terminal device.
  • the end device receives the network selection priority of the second VPLMN.
  • the first VPLMN AMF may send a fourth message to the terminal device.
  • the fourth message is a response message to the first message, and the fourth message may include the network selection priority of the second VPLMN.
  • the fourth message is a registration acceptance message.
  • the fourth message may also indicate the S-NSSAI supported by the first VPLMN in the requested NSSAI (Requested NSSAI), that is, the allowed NSSAI (allowed NSSAI), and the first VPLMN in the requested NSSAI (Requested NSSAI). Unsupported S-NSSAI, that is, rejected NSSAI (Rejected NSSAI).
  • the NSSAI (Requested NSSAI) requested by the terminal device at the first VPLMN includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3.
  • the first VPLMN is at the terminal device.
  • the location supports VPLMN S-NSSAI-1 and VPLMN S-NSSAI-2, but does not support VPLMN S-NSSAI-3. That is, the allowed NSSAI (Allowed NSSAI) includes: VPLMN S-NSSAI-1 and VPLMN S-NSSAI-2, and the rejected NSSAI (Rejected NSSAI) includes VPLMN S-NSSAI-3.
  • the HPLMN NSSF can select the second VPLMN for the terminal device.
  • the second VPLMN supports the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device. All HPLMN S-NSSAI included in the terminal device have a mapping relationship. slice, then HPLMN NSSF sends the information of the second VPLMN to HPLMN UDM, and HPLMN UDM adjusts the network selection priority of the second VPLMN to be higher than the network selection priority of the first VPLMN, and then uses the first VPLMN AMF to adjust the network selection priority of the second VPLMN.
  • the network selection priority of the VPLMN is sent to the terminal device, and the terminal device can choose to access the second VPLMN according to the order of the updated PLMN network selection priority. In this way, the requests of the terminal device can be satisfied to a greater extent and the user experience of the terminal device can be improved.
  • the HPLMN NSSF can determine the second VPLMN from the candidate VPLMN, and the number of the second VPLMN in the embodiment of the present application can be one or more. If the number of the second VPLMN is one, it can be understood as:
  • the number of candidate VPLMNs determined by the HPLMN NSSF is one, and all HPLMN S-NSSAIs contained in the mapping relationship (mapping of Requested NSSAI) supported by the candidate VPLMN at the location of the terminal device have Slices of mapping relationships. or,
  • the number of candidate VPLMNs determined by HPLMN NSSF is multiple. These multiple candidate VPLMNs support the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device. All HPLMN S-NSSAIs contained in it have Slices of mapping relationships. The HPLMN NSSF can randomly determine one of these candidate VPLMNs as the second VPLMN.
  • the number of second VPLMNs is multiple, it can be understood as: the number of candidate VPLMNs determined by HPLMN NSSF is multiple, and these multiple candidate VPLMNs support the mapping relationship (mapping of Requested) with the requested NSSAI at the location of the terminal device.
  • NSSAI contains all HPLMN S-NSSAI slices with mapping relationships. The HPLMN NSSF can determine these multiple candidate VPLMNs as the second VPLMN, and the terminal device can select one of the multiple second VPLMNs to access. That is, you can also refer to the method shown in Figure 7 below.
  • the HPLMN NSSF determines that there is a VPLMN , the slices that the HPLMN S-NSSAI included in the mapping of Requested NSSAI supported by it have a mapping relationship are larger than the current ones. There are more VPLMNs. Even if only some slices are not all slices, since there is no other better VPLMN, this VPLMN can be directly determined as the above-mentioned second VPLMN.
  • the network selection method based on case 1 is introduced above in conjunction with Figure 6. However, it is possible that, as shown in case 2 described above, the slices supported by the candidate VPLMN found by HPLMN NSSF and the mapping relationship with the requested NSSAI (mapping of Requested NSSAI) The included part HPLMN S-NSSAI has a mapping relationship.
  • the network selection method based on case 2 is introduced below with reference to Figure 7.
  • FIG. 7 is a schematic flowchart of yet another network selection method 700 provided by an embodiment of the present application.
  • the method 700 may include S701 to S714, where S701 to S704 are similar to the above S501 to S504.
  • the candidate VPLMN is called At least one candidate VPLMN
  • each candidate VPLMN in the at least one candidate VPLMN supports, at the location of the terminal device, a slice that has a mapping relationship with a portion of the HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI).
  • S701 to S704 please refer to the relevant descriptions in S501 to S504, which will not be described again here.
  • the following is an introduction to S705 to S714:
  • the HPLMN NSSF sends the information of at least one candidate VPLMN and the HPLMN slice that has a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN to the HPLMN UDM.
  • the HPLMN UDM receives the information of the at least one candidate VPLMN and the HPLMN slices that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN.
  • the HPLMN slices that have a mapping relationship with the slices supported by each candidate VPLMN belong to the slices identified by the HPLMN S-NSSAI included in the mapping of the requested NSSAI (mapping of Requested NSSAI).
  • the NSSAI (Requested NSSAI) requested by the terminal device in the first VPLMN includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3, among which, VPLMN S-NSSAI-1, VPLMN S -The mapping relationship between NSSAI-2 and VPLMN S-NSSAI-3 and HPLMN S-NSSAI is shown in Table 1.
  • the candidate VPLMN includes candidate VPLMN#1, candidate VPLMN#2, and candidate VPLMN#3.
  • candidate VPLMN#1 includes candidate VPLMN#1, candidate VPLMN#2, and candidate VPLMN#3.
  • S-NSSAI supported by candidate VPLMN includes candidate VPLMN#1, candidate VPLMN#2, and candidate VPLMN#3.
  • the S-NSSAI supported by candidate VPLMN and the mapping relationship between candidate VPLMN S-NSSAI and HPLMN S-NSSAI are shown in Table 3.
  • HPLMN slices sent by HPLMN NSSF to HPLMN UDM that have a mapping relationship with the slices supported by each candidate VPLMN include: HPLMN S-NSSAI-A and HPLMN S-NSSAI-C that have a mapping relationship with the slices supported by candidate VPLMN#1, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C that have a mapping relationship with slices supported by candidate VPLMN#2 and HPLMN S-NSSAI-A and HPLMN S-NSSAI-C that have a mapping relationship with slices supported by candidate VPLMN#3 B.
  • the HPLMN NSSF sends the information of the at least one candidate VPLMN to the HPLMN UDM, that is, sends the information of the candidate VPLMN#1, the candidate VPLMN#2, and the candidate VPLMN#3.
  • the candidate VPLMN#1, the candidate VPLMN#2, and the candidate VPLMN#3 can be sent. Identification of VPLMN#3.
  • the HPLMN UDM sends the information of the at least one candidate VPLMN and the HPLMN slices that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN to the first VPLMN AMF.
  • the first VPLMN AMF receives the information of the at least one candidate VPLMN and the HPLMN slices that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN.
  • the first VPLMN AMF sends the information of the at least one candidate VPLMN and the HPLMN slice that has a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN to the terminal device.
  • the terminal device receives the information of the at least one candidate VPLMN and the HPLMN slice that has a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN.
  • the first VPLMN AMF may send a fifth message to the terminal device.
  • the fifth message is a response message to the first message.
  • the fifth message may include the information of the at least one candidate VPLMN and the at least one candidate VPLMN.
  • Each slice supported by the candidate VPLMN in a candidate VPLMN has an HPLMN slice with a mapping relationship.
  • the fifth message is a registration acceptance (registration sccept) message.
  • the fifth message may also indicate the S-NSSAI supported by the first VPLMN in the requested NSSAI (Requested NSSAI), that is, the allowed NSSAI (allowed NSSAI), and the first VPLMN in the requested NSSAI (Requested NSSAI). Unsupported S-NSSAI, that is, rejected NSSAI (Rejected NSSAI).
  • the terminal device determines a second VPLMN from the at least one candidate VPLMN.
  • the terminal device determines the second VPLMN from the at least one candidate VPLMN according to the user's service requirements.
  • the terminal device may determine the second VPLMN according to the user's service requirements.
  • the terminal device receives information about the candidate VPLMN#1, the candidate VPLMN#2, and the candidate VPLMN#3 and the slices supported by the candidate VPLMN#1, the candidate VPLMN#2, and the candidate VPLMN#3. HPLMN slices of the mapping relationship, and determine the second VPLMN from candidate VPLMN#1, candidate VPLMN#2, and candidate VPLMN#3.
  • the terminal device determines that the HPLMN slices that have a mapping relationship with the slices supported by candidate VPLMN#1 include HPLMN S-NSSAI-A and HPLMN S-NSSAI- C. Therefore, the terminal device can determine candidate VPLMN#1 as the second VPLMN.
  • the second VPLMN determined in the embodiment of this application may be the first VPLMN.
  • the terminal device determines that the second VPLMN and the first VPLMN are the same VPLMN, The terminal device continues to reside in the first VPLMN without requesting a change in network selection priority.
  • the terminal device sends the information of the second VPLMN to the first VPLMN AMF to request the HPLMN UDM to update the network selection priority of the second VPLMN.
  • the first VPLMN AMF receives the information of the second VPLMN.
  • the terminal device carries the information of the second VPLMN through a registration complete message and sends the registration complete message to the first VPLMN AMF.
  • the information of the second VPLMN includes the identifier of the second VPLMN, and the identifier of the second VPLMN may instruct the HPLMN UDM to adjust the network selection priority of the second VPLMN to be higher than the network selection priority of the first VPLMN.
  • the first VPLMN AMF sends the information of the second VPLMN to the HPLMN UDM to request to update the network selection priority of the second VPLMN.
  • the HPLMN UDM receives the information of the second VPLMN.
  • the second VPLMN in the embodiment of the present application is different from the second VPLMN in the embodiment described in Figure 6.
  • the second VPLMN in the embodiment of the present application supports the mapping relationship with the requested NSSAI at the location of the terminal device ( Part of the HPLMN S-NSSAI included in mapping of Requested NSSAI has slices of mapping relationships, and the second VPLMN in the embodiment of this application is determined by the terminal device from the at least one candidate VPLMN.
  • the HPLMN NSSF can determine at least one candidate VPLMN, and the mapping relationship between the slices supported by each candidate VPLMN at the location of the terminal device and the requested NSSAI in the at least one candidate VPLMN. (mapping of Requested NSSAI) contains some HPLMN S-NSSAI that have mapping relationships.
  • the HPLMN NSSF may send to the terminal device an HPLMN slice that has a mapping relationship with the slices supported by each candidate VPLMN at the location of the terminal device in the at least one candidate VPLMN.
  • the terminal device determines a second VPLMN from the at least one candidate VPLMN, and requests the HPLMN UDM to update the network selection priority of the second VPLMN.
  • the second VPLMN is the VPLMN that the terminal device desires to access. In this way, the network can try its best to meet the needs of the terminal device, so that the terminal device can access the desired requested slice in the second VPLMN.
  • method 700 includes S711: the first VPLMN AMF sends first indication information to the HPLMN UDM, and the first indication information is used to instruct the HPLMN UDM to update the network selection priority.
  • the first VPLMN does not support at least one of the slices requested by the terminal device to access, that is, the first VPLMN does not support at least one of the requested NSSAI (Requested NSSAI) S-NSSAI to trigger the first VPLMN to send the first indication information.
  • the first VPLMN supports all slices requested by the terminal device for access, that is, supports the full set of requested NSSAI (Requested NSSAI)
  • the first VPLMN AMF can accept the access request of the terminal device according to the first message and no longer instruct the HPLMN Select another VPLMN again.
  • the HPLMN UDM is responsible for determining the network selection priority of at least one candidate VPLMN.
  • the terminal device can give priority to access the candidate VPLLMN with a high network selection priority.
  • the first VPLMN AMF can instruct the HPLMN UDM to update the network selection priority through the first indication information, and configure the second VPLMN with a higher network selection priority than the first VPLMN, so that the terminal device can according to the updated network selection priority. Select the network priority to access the second VPLMN first.
  • the first VPLMN AMF can encapsulate the mapping relationship (mapping of Requested NSSAI) of the first indication information, the terminal device's location information, and the requested NSSAI in the same message and send it to the HPLMN UDM, or it can also use the first indication information as A separate message is sent to HPLMN UDM, which is not limited in the embodiment of this application.
  • mapping relationship mapping of Requested NSSAI
  • the first VPLMN AMF may first send the mapping relationship (mapping of Requested NSSAI) between the terminal device's location information and the requested NSSAI to the HPLMN UDM, and then send the first indication information to the HPLMN UDM through other messages alone.
  • mapping relationship mapping of Requested NSSAI
  • method 700 may also include S712: HPLMN UDM sends the network selection priority of the second VPLMN to the first VPLMN AMF, and the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  • the first VPLMN AMF receives the network selection priority of the second VPLMN.
  • the HPLMN UDM can adjust the network selection priority of the second VPLMN to be higher than the network selection priority of the first VPLMN.
  • the adjusted The network selection priority of the second VPLMN is sent to the first VPLMN AMF. Therefore, in S712, what the HPLMN UDM sends to the first VPLMN AMF is the updated network selection priority of the second VPLMN.
  • the HPLMN UDM can carry the adjusted network selection priority and send it to the first VPLMN AMF through the SOR message.
  • method 700 also includes S713: the first VPLMN AMF sends a third message to the terminal device, the third message carries the network selection priority of the second VPLMN, and the network selection priority of the second VPLMN is updated. The subsequent network selection priority.
  • the terminal device receives the third message.
  • the terminal device After receiving the third message, the terminal device searches for the VPLMN at the current location, and determines based on the updated network selection priority that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN, so the terminal device can To re-enter the network according to the instructions of network selection priority.
  • the third message is a DL NAS transmission message, and the third message includes SOR information, and the SOR information carries the network selection priority of the second VPLMN.
  • the terminal device may choose to register from the first VPLMN and register to access the second VPLMN.
  • the network selection method based on situation 2 is introduced above in conjunction with Figure 7, in which the HPLMN NSSF can send the information of the at least one candidate VPLMN to the terminal device through the HPLMN UDM and the first VPLMN, and the terminal device can select the at least one candidate VPLMN from the Determine the second VPLMN and request the HPLMN UDM to update the network selection priority of the second VPLMN.
  • the at least one candidate VPLMN cannot meet the expectations of the terminal device, that is, it cannot find one that can support all HPLMN S-NSSAIs contained in the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device.
  • Sliced VPLMN is introduced below with reference to Figure 8 .
  • FIG. 8 is a schematic flow chart of yet another network selection method 800 provided by an embodiment of the present application.
  • the method 800 may include S801 to S808, where S801 to S804 are similar to the above S501 to S504.
  • the candidate VPLMN is called At least one candidate VPLMN, each candidate VPLMN in the at least one candidate VPLMN supports a slice having a mapping relationship with a portion of the HPLMN S-NSSAI included in the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device.
  • mapping of Requested NSSAI mapping of Requested NSSAI
  • HPLMN NSSF sends third indication information to HPLMN UDM.
  • the third indication information is used to indicate that no other VPLMN that can support all slices requested by the terminal device to access is found.
  • HPLMN UDM receives the third indication information.
  • HPLMN UDM sends the third instruction information to the first VPLMN AMF.
  • the first VPLMN AMF receives the third indication information.
  • the HPLMN NSSF has not found a VPLMN that can support all the slices that the terminal device requested to access in the first VPLMN.
  • the HPLMN NSSF can send the third indication message to the first VPLMN AMF through the HPLMN UDM to indicate that the search failed.
  • the HPLMN UDM does not need to adjust the network selection priority of the VPLMN, and the terminal device can continue to reside in the first VPLMN. .
  • method 800 also includes S807: the first VPLMN AMF sends third indication information to the terminal device.
  • the terminal device receives the third indication information.
  • the first VPLMN AMF may send a sixth message to the terminal device, where the sixth message is a response message to the first message, and the sixth message may include third indication information.
  • the sixth message is a registration acceptance message.
  • the sixth message may also indicate information about the slices supported by the first VPLMN in one or more slices that the terminal device requests access to, that is, allowed NSSAI (allowed NSSAI), and one of the slices that the terminal device requests to access. Or information about the slice that is not supported by the first VPLMN among multiple slices, that is, rejected NSSAI (rejected NSSAI).
  • allowed NSSAI allowed NSSAI
  • rejected NSSAI rejected NSSAI
  • method 800 also includes S808: based on the third indication information, the terminal device determines to continue to reside on the first VPLMN.
  • the terminal device if the terminal device does not send the second indication information to the first VPLMN indicating that the first VPLMN does not support at least one S-NSSAI in the requested NSSAI (Requested NSSAI), it is The terminal device searches for information about other VPLMNs that support all slices requested by the terminal device to access. Then, after the first VPLMN AMF receives the third indication information in S806, the first VPLMN may choose not to send the third indication information to the terminal device, that is, The first VPLMN may not indicate that the terminal device has not found other VPLMNs that support all slices in the NSSAI (Requested NSSAI) requested by the terminal device. The terminal device may continue to camp in the first VPLMN without receiving the third indication information.
  • FIG. 8 introduces the situation where there is at least one candidate VPLMN supported by the location of the terminal device and some HPLMN S-NSSAI slices with mapping relationships included in the mapping relationship with the requested NSSAI (mapping of Requested NSSAI), where, it can be
  • the HPLMN NSSF sends the third indication information to the terminal device through the HPLMN UDM and the first VPLMN, indicating that the terminal device has not found all HPLMN contained in the location support of the terminal device and the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI.
  • S-NSSAI has other VPLMNs of the slices with mapping relationships.
  • each network element may perform some or all of the steps in each embodiment. These steps or operations are only examples, and embodiments of the present application may also perform other operations or variations of various operations. In addition, various steps may be performed in a different order presented in each embodiment, and it is possible that not all operations in the embodiments of the present application are performed. Moreover, the size of the serial number of each step does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.
  • the network selection method according to the embodiment of the present application is described in detail above with reference to FIGS. 2 to 8 .
  • the network selection device according to the embodiment of the present application will be described in detail with reference to FIGS. 9 and 10 .
  • Figure 9 shows a schematic block diagram of a network selection device 900 provided by an embodiment of the present application.
  • the device 900 includes a transceiver module 910 and a determination module 920.
  • the network selection device 900 may correspond to the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal device in the above embodiment, for example, it may be the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal device.
  • Components such as circuits, chips or chip systems, etc.).
  • the network selection device 900 may correspond to the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal device in the methods 500 to 800 according to the embodiment of the present application, and the network selection device 900 may include a device for executing the steps in Figure 5
  • the method 500 to the method 800 in Figure 8 is a module of the method executed by the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal device.
  • each module in the network selection device 900 and the above-mentioned other operations and/or functions are respectively intended to implement the corresponding processes of the method 500 in FIG. 5 to the method 800 in FIG. 8 .
  • the transceiver module 910 in the network selection device 900 can be implemented by a transceiver, for example, it can correspond to the one shown in Figure 10 Transceiver 1020 in network selection device 1000.
  • the determination module 920 in the network selection device 900 may be implemented by at least one processor, for example, may correspond to the processor 1010 in the communication device network selection device 1000 shown in FIG. 10 .
  • the transceiver module 910 in the network selection device 900 can use the input/output interface, circuit etc.
  • the determination module 920 in the network selection device 900 can pass the chip Or a processor, microprocessor or integrated circuit integrated on a chip system.
  • FIG. 10 is a schematic block diagram of another network selection device 1000 provided by an embodiment of the present application.
  • the network selection device 1000 includes a processor 1010 , a transceiver 1020 and a memory 1030 .
  • the processor 1010, the transceiver 1020 and the memory 1030 communicate with each other through internal connection paths.
  • the memory 1030 is used to store instructions.
  • the processor 1010 is used to execute the instructions stored in the memory 1030 to control the transceiver 1020 to send signals and /or receive a signal.
  • the network selection device 1000 may correspond to the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal equipment, and may be used to perform each of the steps performed by the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal equipment in the above method embodiments. steps and/or processes.
  • the memory 1030 may include read-only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory.
  • the memory 1030 may be a separate device or integrated into the processor 1010.
  • the processor 1010 can be used to execute instructions stored in the memory 1030, and when the processor 1010 executes the instructions stored in the memory, the processor 1010 is used to execute the first VPLMN AMF, HPLMN UDM, Each step and/or process corresponding to HPLMN NSSF or terminal equipment.
  • the network selection device 1000 is the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal equipment.
  • the transceiver 1020 may include a transmitter and a receiver.
  • the transceiver 1020 may further include an antenna, and the number of antennas may be one or more.
  • the processor 1010, the memory 1030 and the transceiver 1020 may be devices integrated on different chips.
  • the processor 1010 and the memory 1030 can be integrated in a baseband chip, and the transceiver 1020 can be integrated in a radio frequency chip.
  • the processor 1010, the memory 1030 and the transceiver 1020 may also be devices integrated on the same chip. This application does not limit this.
  • the network selection device 1000 is a component configured in the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal equipment, such as a circuit, a chip, a chip system, etc.
  • the transceiver 1020 may also be a communication interface, such as an input/output interface, a circuit, etc.
  • the transceiver 1020, the processor 1010 and the memory 1030 can be integrated in the same chip, such as a baseband chip.
  • This application also provides a processing device, including at least one processor, the at least one processor is used to execute a computer program stored in the memory, so that the processing device executes the first VPLMN AMF, HPLMN UDM, HPLMN NSSF, or the method executed by the end device.
  • An embodiment of the present application also provides a processing device, including a processor and a communication interface.
  • the communication interface is coupled to the processor.
  • the communication interface is used to input and/or output information.
  • the information includes at least one of instructions and data.
  • the processor is used to execute a computer program, so that the processing device executes the method executed by the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal device in any of the above method embodiments.
  • An embodiment of the present application also provides a processing device, including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the processing device executes the first VPLMN AMF, HPLMN UDM, HPLMN NSSF in any of the above method embodiments. Or the method executed by the terminal device.
  • the processing device may be one or more chips.
  • the processing device can be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), or It's the central office It can be a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), or a microcontroller unit (MCU). ), or it can be a programmable logic device (PLD) or other integrated chip.
  • FPGA field programmable gate array
  • ASIC application specific integrated circuit
  • SoC system on chip
  • CPU central processor unit
  • NP network processor
  • DSP digital signal processor
  • MCU microcontroller unit
  • PLD programmable logic device
  • each step of the above method can be completed by instructions in the form of hardware integrated logic circuits or software in the processor.
  • the steps of the methods disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware processor for execution, or can be executed by a combination of hardware and software modules in the processor.
  • the software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capabilities.
  • each step of the above method embodiment can be completed through an integrated logic circuit of hardware in the processor or instructions in the form of software.
  • the above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • the steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • RAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the present application also provides a computer program product.
  • the computer program product includes: computer program code.
  • the computer program code When the computer program code is run on a computer, it causes the computer to execute the steps shown in Figures 5 to 8. The method executed by the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal device in the illustrated embodiment.
  • the present application also provides a computer-readable storage medium.
  • the computer-readable storage medium stores program code.
  • the program code When the program code is run on a computer, it causes the computer to execute Figures 5 to 5.
  • the communication device or base station in each of the above device embodiments corresponds completely to the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal equipment in the method embodiment, and the corresponding steps are performed by the corresponding modules or units, such as the transceiver module (transceiver ) perform the steps of receiving or sending in the method embodiment. Other steps except sending and receiving may be executed by the determination module (processor).
  • the determination module processor
  • a component may be, but is not limited to, a process, a processor, an object, an executable file, a thread of execution, a program and/or a computer running on a processor.
  • applications running on the computing device and the computing device may be components.
  • One or more components can reside in a process and/or thread of execution and a component can be localized on one computer and/or distributed between 2 or more computers. Additionally, these components can execute from various computer-readable media having various data structures stored thereon.
  • a component may, for example, be based on a signal having one or more data packets (eg, data from two components interacting with another component, a local system, a distributed system, and/or a network, such as the Internet, which interacts with other systems via signals) Communicate through local and/or remote processes.
  • data packets eg, data from two components interacting with another component, a local system, a distributed system, and/or a network, such as the Internet, which interacts with other systems via signals
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. and
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes.

Abstract

The present application provides a network selection method and a network selection apparatus, which are beneficial to satisfying the service requirements of a terminal device. The method comprises: a terminal device sending a first message to a first VPLMN, the first message comprising NSSAI requested by the terminal device; the first VPLMN sending HPLMN UDM a mapping relationship between location information of the terminal device and the requested NSSAI; the HPLMN UDM sending an HPLMN NSSF the mapping relationship between the location information of the terminal device and the requested NSSAI; the HPLMN NSSF sending the HPLMN UDM information of a second VPLMN, wherein the network selection priority of the second VPLMN is higher than that of the first VPLMN; the HPLMN UDM sending the first VPLMN the information of the second VPLMN; and the first VPLMN sending the terminal device the information of the second VPLMN.

Description

网络选择方法和网络选择装置Network selection method and network selection device
本申请要求于2022年03月28日提交中国专利局、申请号为202210313789.0、申请名称为“网络选择方法和网络选择装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims priority to the Chinese patent application filed with the China Patent Office on March 28, 2022, with application number 202210313789.0 and application name "Network Selection Method and Network Selection Device", the entire content of which is incorporated into this application by reference. .
技术领域Technical field
本申请涉及通信领域，更具体地，涉及一种网络选择方法和网络选择装置。The present application relates to the field of communications, and more specifically, to a network selection method and a network selection device.
背景技术Background technique
在漫游场景下，终端设备可以按照配置的公共陆地移动通信网络(public land mobile network，PLMN)选网优先级接入某个拜访地PLMN(visited PLMN，VPLMN)，例如，终端设备配置的选网策略为VPLMN-1的优先级高于VPLMN-2，那么终端设备可以接入优先级高的VPLMN-1。In a roaming scenario, the terminal device can access a visited PLMN (VPLMN) according to the configured public land mobile network (PLMN) network selection priority. For example, the terminal device configures the network selection The policy is that VPLMN-1 has a higher priority than VPLMN-2, so the terminal device can access VPLMN-1 with a higher priority.
在第五代移动通信技术(5th generation mobile communication technology，5G)中引入了网络切片(slice)，以保障不同业务的服务质量(quality of service，QoS)需求。然而，终端设备在漫游场景下，若按照配置的PLMN选网优先级接入VPLMN，其所接入的VPLMN可能没有部署终端设备请求的网络切片，导致终端设备的业务需求得不到满足。Network slicing (slice) is introduced in the fifth generation mobile communication technology (5G) to ensure the quality of service (QoS) requirements of different businesses. However, in a roaming scenario, if a terminal device accesses a VPLMN according to the configured PLMN network selection priority, the VPLMN it accesses may not be deployed with the network slice requested by the terminal device, causing the service requirements of the terminal device not to be met.
因此，希望提供一种方法，以期尽可能地满足终端设备的业务需求，提升使用体验。Therefore, we hope to provide a method to meet the business needs of terminal devices as much as possible and improve the user experience.
发明内容Contents of the invention
本申请提供一种确定网络选择方法和网络选择装置，有利于满足终端设备的业务需求，提升使用体验。This application provides a method and device for determining network selection, which is conducive to meeting the business needs of terminal equipment and improving user experience.
第一方面，提供了一种网络选择方法，应用于第一VPLMN，该方法包括：从终端设备接收第一消息，第一消息用于请求接入第一VPLMN，第一消息包括终端设备请求在第一VPLMN接入的一个或多个切片。在第一VPLMN不支持终端设备请求接入的切片中的至少一个的情况下，向归属地公共陆地移动通信网络(home PLMN，HPLMN)的统一数据管理(unified data management，UDM)网元发送终端设备的位置信息和HPLMN的一个或多个切片的信息，其中，HPLMN的一个或多个切片与终端设备请求在第一VPLMN接入的一个或多个切片具有映射关系。从UDM网元接收第二VPLMN的选网优先级，第二VPLMN的选网优先级高于第一VPLMN的选网优先级，第二VPLMN支持的切片包括分别与HPLMN的一个或多个切片具有映射关系的切片。向终端设备发送第二VPLMN的选网优先级。In a first aspect, a network selection method is provided, applied to a first VPLMN. The method includes: receiving a first message from a terminal device, the first message is used to request access to the first VPLMN, and the first message includes the terminal device requesting access to the first VPLMN. One or more slices accessed by the first VPLMN. In the case where the first VPLMN does not support at least one of the slices requested by the terminal device to access, the terminal is sent to the unified data management (unified data management, UDM) network element of the home public land mobile communication network (home PLMN, HPLMN). The location information of the device and the information of one or more slices of the HPLMN, where the one or more slices of the HPLMN have a mapping relationship with the one or more slices that the terminal device requests to access in the first VPLMN. The network selection priority of the second VPLMN is received from the UDM network element. The network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN. The slices supported by the second VPLMN include one or more slices that are identical to one or more slices of the HPLMN. Slices of mapping relationships. Send the network selection priority of the second VPLMN to the terminal device.
在下文对具体实施例的描述中可以将终端设备请求在第一VPLMN接入的一个或多个切片称为请求的NSSAI(Requested NSSAI)，将HPLMN的一个或多个切片的信息称为请求的NSSAI的映射关系(mapping of Requested NSSAI)。In the following description of specific embodiments, one or more slices requested by the terminal device to access the first VPLMN may be called requested NSSAI (Requested NSSAI), and the information of one or more slices of HPLMN may be called requested Mapping of NSSAI (mapping of Requested NSSAI).
基于上述技术方案，第一VPLMN在确定无法支持终端设备请求接入的切片中的至少 一个的情况下，第一VPLMN可以向HPLMN的UDM网元(以下称为HPLMN UDM)发送终端设备的位置信息和HPLMN的一个或多个切片的信息，以请求HPLMN为终端设备寻找可以支持终端设备请求接入的全部切片的其他VPLMN。其中，第二VPLMN即为确定的可以支持终端设备请求接入的全部切片的VPLMN。之后第一VPLMN可以向终端设备发送第二VPLMN的选网优先级，第二VPLMN的选网优先级高于第一VPLMN的选网优先级，终端设备可以根据选网优先级优先接入第二VPLMN。这样，相比第一VPLMN而言，网络为终端设备寻找到的第二VPLMN可以支持终端设备请求的全部切片，因此，网络可以更大程度地满足终端设备的业务需求，有利于提升使用体验。Based on the above technical solution, the first VPLMN determines that it cannot support at least one of the slices requested by the terminal device to access. In one case, the first VPLMN may send the location information of the terminal device and the information of one or more slices of the HPLMN to the UDM network element of the HPLMN (hereinafter referred to as the HPLMN UDM) to request the HPLMN to find a terminal device that can support the terminal device. Other VPLMNs requesting access to all slices. The second VPLMN is the determined VPLMN that can support all slices requested to be accessed by the terminal device. Afterwards, the first VPLMN can send the network selection priority of the second VPLMN to the terminal device. The network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN. The terminal device can preferentially access the second VPLMN according to the network selection priority. VPLMN. In this way, compared with the first VPLMN, the second VPLMN found by the network for the terminal device can support all slices requested by the terminal device. Therefore, the network can meet the business needs of the terminal device to a greater extent, which is beneficial to improving the user experience.
结合第一方面，在第一方面的某些实现方式中，该方法还包括：向HPLMN UDM发送第一指示信息，第一指示信息用于指示更新选网优先级。从HPLMN UDM接收第二VPLMN的选网优先级，包括：从HPLMN UDM接收更新后的选网优先级，更新后的选网优先级用于指示第二VPLMN的选网优先级高于第一VPLMN的选网优先级。Combined with the first aspect, in some implementations of the first aspect, the method further includes: sending first indication information to the HPLMN UDM, where the first indication information is used to indicate updating the network selection priority. Receiving the network selection priority of the second VPLMN from HPLMN UDM includes: receiving the updated network selection priority from HPLMN UDM. The updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than that of the first VPLMN. The network selection priority.
在本申请中，第一VPLMN向HPLMN UDM发送第一指示信息，在确定第二VPLMN之后，第一指示信息可以触发HPLMN UDM调整VPLMN的选网优先级，这样，HPLMN UDM可以调整第二VPLMN的选网优先级高于第一VPLMN的选网优先级。In this application, the first VPLMN sends the first instruction information to the HPLMN UDM. After determining the second VPLMN, the first instruction information can trigger the HPLMN UDM to adjust the network selection priority of the VPLMN. In this way, the HPLMN UDM can adjust the network selection priority of the second VPLMN. The network selection priority is higher than the network selection priority of the first VPLMN.
结合第一方面，在第一方面的某些实现方式中，向HPLMN UDM发送第一指示信息，包括：在确定第一VPLMN不支持终端设备请求接入的切片中的至少一个的情况下，向HPLMN UDM发送第一指示信息。Combined with the first aspect, in some implementations of the first aspect, sending the first indication information to the HPLMN UDM includes: when it is determined that the first VPLMN does not support at least one of the slices requested by the terminal device to access, sending the first indication information to the HPLMN UDM. HPLMN UDM sends the first indication information.
在本申请中，第一VPLMN不支持终端设备请求接入的切片中的至少一个为触发第一VPLMN发送第一指示信息的条件。反之，如果第一VPLMN支持终端设备请求接入的全部切片，那么第一VPLMN无需指示HPLMN重新选择其他的VPLMN。In this application, the first VPLMN does not support at least one of the slices to which the terminal device requests access, which is a condition that triggers the first VPLMN to send the first indication information. On the contrary, if the first VPLMN supports all slices that the terminal device requests to access, then the first VPLMN does not need to instruct the HPLMN to reselect other VPLMNs.
结合第一方面，在第一方面的某些实现方式中，第一消息还包括第二指示信息，第二指示信息用于指示若第一VPLMN不支持终端设备请求接入的切片中的至少一个，为终端设备寻找支持终端设备请求接入的全部切片的其他VPLMN的信息。In conjunction with the first aspect, in some implementations of the first aspect, the first message further includes second indication information, and the second indication information is used to indicate if the first VPLMN does not support at least one of the slices that the terminal device requests to access. , for the terminal device to find information about other VPLMNs that support all slices that the terminal device requests access to.
在本申请中，终端设备在发送给第一VPLMN的第一消息中可以包括第二指示信息，第一VPLMN在接收到第二指示信息后，可以确定终端设备期望接入一个可以支持终端设备请求的全部切片的其他VPLMN。In this application, the terminal device may include second indication information in the first message sent to the first VPLMN. After receiving the second indication information, the first VPLMN may determine that the terminal device desires to access a network that can support the terminal device request. All slices of other VPLMN.
可选地，第二指示信息还指示第一VPLMN需要向终端设备返回寻找到的其他VPLMN的信息。Optionally, the second indication information also indicates that the first VPLMN needs to return the found information of other VPLMNs to the terminal device.
可选地，该方法还包括：第一VPLMN确定终端设备请求接入的一个或多个切片中是否存在第一VPLMN不支持的切片。Optionally, the method further includes: the first VPLMN determines whether there are slices that the first VPLMN does not support in one or more slices that the terminal device requests to access.
可选地，该方法还包括：第一VPLMN获取终端设备的位置信息。Optionally, the method further includes: the first VPLMN obtains the location information of the terminal device.
第二方面，提供了一种网络选择方法，应用于第一VPLMN，该方法包括：从终端设备接收第一消息，第一消息用于请求接入第一VPLMN，第一消息包括终端设备请求在第一VPLMN接入的一个或多个切片。在第一VPLMN不支持终端设备请求接入的切片中的至少一个的情况下，向HPLMN UDM发送终端设备的位置信息和HPLMN的一个或多个切片的信息。从HPLMN UDM接收至少一个候选VPLMN的信息以及与该至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN的切片的信息。向终端设备发送至少一个候选VPLMN的信息以及与每个候选VPLMN支持的切片具有映射关系 的HPLMN的切片的信息。从终端设备接收第二VPLMN的信息，第二VPLMN为至少一个候选VPLMN中的一个。向HPLMN UDM发送第二VPLMN的信息，以请求更新第二VPLMN的选网优先级。In a second aspect, a network selection method is provided, applied to the first VPLMN. The method includes: receiving a first message from a terminal device, the first message is used to request access to the first VPLMN, and the first message includes the terminal device requesting access to the first VPLMN. One or more slices accessed by the first VPLMN. If the first VPLMN does not support at least one of the slices that the terminal device requests to access, the location information of the terminal device and the information of one or more slices of the HPLMN are sent to the HPLMN UDM. Information of at least one candidate VPLMN and information of slices of the HPLMN having a mapping relationship with slices supported by each candidate VPLMN in the at least one candidate VPLMN are received from the HPLMN UDM. Send information about at least one candidate VPLMN and a mapping relationship with the slices supported by each candidate VPLMN to the terminal device HPLMN slice information. Information about the second VPLMN is received from the terminal device, where the second VPLMN is one of at least one candidate VPLMN. Send the information of the second VPLMN to the HPLMN UDM to request to update the network selection priority of the second VPLMN.
其中，HPLMN的一个或多个切片与终端设备请求在第一VPLMN接入的一个或多个切片具有映射关系。与该至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN的切片包括部分与终端设备请求在第一VPLMN接入的切片具有映射关系的HPLMN的切片。One or more slices of the HPLMN have a mapping relationship with one or more slices that the terminal device requests to access in the first VPLMN. The slices of the HPLMN that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN include some slices of the HPLMN that have a mapping relationship with the slices that the terminal device requests to access in the first VPLMN.
基于上述技术方案，第一VPLMN在确定无法支持终端设备请求接入的切片中的至少一个的情况下，第一VPLMN可以向HPLMN UDM发送终端设备的位置信息和HPLMN的一个或多个切片的信息，以请求HPLMN为终端设备寻找可以支持终端设备请求接入的全部切片的其他VPLMN。第一VPLMN可以向终端设备发送至少一个候选VPLMN的信息以及至少一个候选VPLMN中每个候选VPLMN支持的切片的信息，由终端设备决定想要接入至少一个候选VPLMN中的哪个候选VPLMN，终端设备选择的候选VPLMN即为第二VPLMN。Based on the above technical solution, when the first VPLMN determines that it cannot support at least one of the slices requested by the terminal device to access, the first VPLMN can send the location information of the terminal device and the information of one or more slices of the HPLMN to the HPLMN UDM. , to request the HPLMN to find other VPLMNs for the terminal device that can support all slices that the terminal device requests to access. The first VPLMN may send information about at least one candidate VPLMN and information about slices supported by each candidate VPLMN in the at least one candidate VPLMN to the terminal device, and the terminal device decides which candidate VPLMN among the at least one candidate VPLMN it wants to access. The terminal device The selected candidate VPLMN is the second VPLMN.
在本申请中，虽然网络未寻找到可以支持终端设备请求的全部切片的VPLMN，但是网络将至少一个候选VPLMN中每个候选VPLMN支持的切片的信息返回终端设备，由终端设备确定第二VPLMN，并通知HPLMN UDM更新第二VPLMN的选网优先级，由于第二VPLMN为终端设备确定的，因此可以支持终端设备期望访问的切片，这样有利于满足终端设备的业务需求，提升终端设备的使用体验。In this application, although the network does not find a VPLMN that can support all the slices requested by the terminal device, the network returns information about the slices supported by each candidate VPLMN in at least one candidate VPLMN to the terminal device, and the terminal device determines the second VPLMN, And notify HPLMN UDM to update the network selection priority of the second VPLMN. Since the second VPLMN is determined by the terminal device, it can support the slices that the terminal device expects to access. This will help meet the business needs of the terminal device and improve the user experience of the terminal device. .
结合第二方面，在第二方面的某些实现方式中，在向HPLMN UDM发送第二VPLMN的信息之后，该方法还包括：从HPLMN UDM接收第二VPLMN的选网优先级，第二VPLMN的选网优先级高于第一VPLMN的选网优先级。向终端设备发送第二VPLMN的选网优先级。Combined with the second aspect, in some implementations of the second aspect, after sending the information of the second VPLMN to the HPLMN UDM, the method further includes: receiving the network selection priority of the second VPLMN from the HPLMN UDM, and the second VPLMN's network selection priority. The network selection priority is higher than the network selection priority of the first VPLMN. Send the network selection priority of the second VPLMN to the terminal device.
结合第二方面，在第二方面的某些实现方式中，该方法还包括：向HPLMN UDM发送第一指示信息，第一指示信息用于指示更新选网优先级。从HPLMN UDM接收第二VPLMN的选网优先级，包括：从HPLMN UDM接收更新后的选网优先级，更新后的选网优先级用于指示第二VPLMN的选网优先级高于第一VPLMN的选网优先级。Combined with the second aspect, in some implementations of the second aspect, the method further includes: sending first indication information to the HPLMN UDM, where the first indication information is used to indicate updating the network selection priority. Receiving the network selection priority of the second VPLMN from HPLMN UDM includes: receiving the updated network selection priority from HPLMN UDM. The updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than that of the first VPLMN. The network selection priority.
结合第二方面，在第二方面的某些实现方式中，向HPLMN UDM发送第一指示信息，包括：在确定第一VPLMN不支持请求接入的切片中的至少一个的情况下，向UDM发送所述第一指示信息。Combined with the second aspect, in some implementations of the second aspect, sending the first indication information to the HPLMN UDM includes: when it is determined that the first VPLMN does not support at least one of the slices requested for access, sending to the UDM the first indication information.
结合第二方面，在第二方面的某些实现方式中，第一消息还包括第二指示信息，第二指示信息用于指示若第一VPLMN不支持终端设备请求接入的切片中的至少一个，为终端设备寻找支持终端设备请求接入的全部切片的其他VPLMN的信息。Combined with the second aspect, in some implementations of the second aspect, the first message further includes second indication information, and the second indication information is used to indicate if the first VPLMN does not support at least one of the slices that the terminal device requests to access. , for the terminal device to find information about other VPLMNs that support all slices that the terminal device requests access to.
可选地，该方法还包括：从HPLMN UDM接收第二VPLMN的选网优先级，该第二VPLMN的选网优先级高于第一VPLMN的选网优先级。Optionally, the method further includes: receiving a network selection priority of the second VPLMN from the HPLMN UDM, where the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
可选地，该方法还包括：向终端设备发送第三消息，该第三消息携带第二VPLMN的选网优先级。Optionally, the method further includes: sending a third message to the terminal device, the third message carrying the network selection priority of the second VPLMN.
示例性地，第三消息为下行(downlink，DL)非接入层(non-access stratum，NAS)传输消息。 For example, the third message is a downlink (downlink, DL) non-access stratum (non-access stratum, NAS) transmission message.
第三方面，提供了一种网络选择方法，应用于HPLMN UDM，该方法包括：从第一VPLMN接收终端设备的位置信息和HPLMN的一个或多个切片的信息。向HPLMN的网络切片选择功能(network slice select function，NSSF)网元发送终端设备的位置信息和HPLMN的一个或多个切片的信息。从HPLMN NSSF接收第二VPLMN的信息，第二VPLMN支持的切片包括分别与HPLMN的一个或多个切片具有映射关系的切片。向第一VPLMN发送第二VPLMN的选网优先级，第二VPLMN的选网优先级高于第一VPLMN的选网优先级。其中，HPLMN的一个或多个切片与终端设备请求在第一VPLMN接入的一个或多个切片具有映射关系。In a third aspect, a network selection method is provided, applied to HPLMN UDM. The method includes: receiving location information of the terminal device and information of one or more slices of the HPLMN from the first VPLMN. Send the location information of the terminal device and the information of one or more slices of HPLMN to the network slice select function (NSSF) network element of HPLMN. The NSSF receives the information of the second VPLMN from the HPLMN, and the slices supported by the second VPLMN include slices that respectively have a mapping relationship with one or more slices of the HPLMN. Send the network selection priority of the second VPLMN to the first VPLMN, and the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN. One or more slices of the HPLMN have a mapping relationship with one or more slices that the terminal device requests to access in the first VPLMN.
基于上述技术方案，HPLMN UDM在接收到终端设备的位置信息和HPLMN的一个或多个切片的信息之后，可以将接收到的信息发送给HPLMN NSSF，由HPLMN NSSF为终端设备寻找可以支持终端设备请求的全部切片的其他VPLMN。在本申请中，第二VPLMN可以支持终端设备请求的全部切片。HPLMN UDM接收到第二VPLMN的信息后，可以通过第一VPLMN向终端设备发送第二VPLMN的选网优先级，其中，第二VPLMN的选网优先级高于第一VPLMN的选网优先级。这样，网络为终端设备寻找到的第二VPLMN可以支持终端设备请求的全部切片，因此，网络在更大程度上满足了终端设备的业务需求，有利于提升使用体验。Based on the above technical solution, after receiving the location information of the terminal device and the information of one or more slices of HPLMN, the HPLMN UDM can send the received information to the HPLMN NSSF, and the HPLMN NSSF will find the terminal device that can support the terminal device request. All slices of other VPLMN. In this application, the second VPLMN can support all slices requested by the terminal device. After receiving the information of the second VPLMN, the HPLMN UDM can send the network selection priority of the second VPLMN to the terminal device through the first VPLMN, where the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN. In this way, the second VPLMN found by the network for the terminal device can support all slices requested by the terminal device. Therefore, the network meets the business requirements of the terminal device to a greater extent, which is beneficial to improving the user experience.
结合第三方面，在第三方面的某些实现方式中，该方法还包括：从第一VPLMN接收第一指示信息，第一指示信息用于指示更新选网优先级。向第一VPLMN发送第二VPLMN的选网优先级，包括：向第一VPLMN发送更新后的选网优先级，更新后的选网优先级用于指示第二VPLMN的选网优先级高于第一VPLMN的选网优先级。Combined with the third aspect, in some implementations of the third aspect, the method further includes: receiving first indication information from the first VPLMN, where the first indication information is used to indicate updating the network selection priority. Sending the network selection priority of the second VPLMN to the first VPLMN includes: sending an updated network selection priority to the first VPLMN. The updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than that of the first VPLMN. A VPLMN network selection priority.
在本申请中，HPLMN UDM从HPLMN NSSF接收到第二VPLMN的信息之后，确定调整第二VPLMN的选网优先级高于第一VPLMN的选网优先级。In this application, after receiving the information of the second VPLMN from the HPLMN NSSF, the HPLMN UDM determines to adjust the network selection priority of the second VPLMN to be higher than the network selection priority of the first VPLMN.
应理解，在调整之前，第一VPLMN的选网优先级高于第二VPLMN的选网优先级。It should be understood that before adjustment, the network selection priority of the first VPLMN is higher than the network selection priority of the second VPLMN.
可选地，第二VPLMN的信息可以包括第二VPLMN的标识，第二VPLMN的信息可以指示HPLMN UDM调整第二VPLMN的选网优先级高于第一VPLMN的选网优先级。Optionally, the information of the second VPLMN may include the identification of the second VPLMN, and the information of the second VPLMN may instruct the HPLMN UDM to adjust the network selection priority of the second VPLMN to be higher than the network selection priority of the first VPLMN.
第四方面，提供了一种网络选择方法，应用于HPLMN UDM，该方法包括：从第一VPLMN接收终端设备的位置信息和HPLMN的一个或多个切片的信息。向HPLMN NSSF发送终端设备的位置信息和HPLMN的一个或多个切片的信息。从NSSF接收至少一个候选VPLMN的信息以及与至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN的切片的信息。向第一VPLMN发送至少一个候选VPLMN的信息以及与每个候选VPLMN支持的切片具有映射关系的HPLMN的切片的信息。从第一VPLMN接收第二VPLMN的信息，第二VPLMN为至少一个候选VPLMN中的一个。In a fourth aspect, a network selection method is provided, applied to HPLMN UDM. The method includes: receiving location information of the terminal device and information of one or more slices of the HPLMN from the first VPLMN. Send the location information of the terminal device and the information of one or more slices of HPLMN to the HPLMN NSSF. Information of at least one candidate VPLMN and information of slices of HPLMNs that have a mapping relationship with slices supported by each candidate VPLMN in the at least one candidate VPLMN are received from the NSSF. Information about at least one candidate VPLMN and information about slices of the HPLMN having a mapping relationship with slices supported by each candidate VPLMN are sent to the first VPLMN. Information about the second VPLMN is received from the first VPLMN, and the second VPLMN is one of at least one candidate VPLMN.
其中，所述HPLMN的一个或多个切片与所述终端设备请求在所述第一VPLMN接入的一个或多个切片具有映射关系。与该至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN的切片包括部分与终端设备请求在第一VPLMN接入的切片具有映射关系的HPLMN的切片。Wherein, one or more slices of the HPLMN have a mapping relationship with one or more slices that the terminal device requests to access in the first VPLMN. The slices of the HPLMN that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN include some slices of the HPLMN that have a mapping relationship with the slices that the terminal device requests to access in the first VPLMN.
基于上述技术方案，HPLMN UDM在接收到终端设备的位置信息和HPLMN的一个或多个切片的信息之后，可以将接收到的信息发送给HPLMN NSSF，由HPLMN NSSF为终端设备寻找可以支持终端设备请求的全部切片的其他VPLMN。HPLMN UDM接收到至 少一个候选VPLMN的信息以及至少一个候选VPLMN中每个候选VPLMN支持的切片的信息之后，可以通过第一VPLMN向终端设备发送至少一个候选VPLMN中每个候选VPLMN支持的切片的信息，由终端设备决定想要接入至少一个候选VPLMN中的哪个候选VPLMN，终端设备选择的候选VPLMN即为第二VPLMN。其中，至少一个候选VPLMN中每个候选VPLMN支持终端设备请求的部分切片。在本申请中，第二VPLMN可以支持终端设备请求的部分切片。Based on the above technical solution, after receiving the location information of the terminal device and the information of one or more slices of HPLMN, HPLMN UDM can send the received information to HPLMN NSSF, and the HPLMN NSSF will find for the terminal device a request that can support the terminal device. All slices of other VPLMN. HPLMN UDM received to After the information of one candidate VPLMN and the information of the slices supported by each candidate VPLMN in the at least one candidate VPLMN are lost, the information of the slices supported by each candidate VPLMN in the at least one candidate VPLMN can be sent to the terminal device through the first VPLMN, and the terminal device Decide which candidate VPLMN among the at least one candidate VPLMN you want to access, and the candidate VPLMN selected by the terminal device is the second VPLMN. Each of the at least one candidate VPLMN supports partial slices requested by the terminal device. In this application, the second VPLMN may support partial slices requested by the terminal device.
在本申请中，虽然网络未寻找到可以支持终端设备请求的全部切片的VPLMN，但是网络将至少一个候选VPLMN中每个候选VPLMN支持的切片的信息返回终端设备，由终端设备确定第二VPLMN，并通知HPLMN UDM更新第二VPLMN的选网优先级，由于第二VPLMN由终端设备确定，因此第二VPLMN可以支持终端设备期望使用的切片，这样有利于满足终端设备的业务需求，提升终端设备的使用体验。In this application, although the network does not find a VPLMN that can support all the slices requested by the terminal device, the network returns information about the slices supported by each candidate VPLMN in at least one candidate VPLMN to the terminal device, and the terminal device determines the second VPLMN, And notify the HPLMN UDM to update the network selection priority of the second VPLMN. Since the second VPLMN is determined by the terminal device, the second VPLMN can support the slices that the terminal device expects to use. This will help meet the business needs of the terminal device and improve the performance of the terminal device. Use experience.
结合第四方面，在第四方面的某些实现方式中，在第一VPLMN接收第二VPLMN的信息之后，该方法还包括：向第一VPLMN发送第二VPLMN的选网优先级，第二VPLMN的选网优先级高于第一VPLMN的选网优先级。Combined with the fourth aspect, in some implementations of the fourth aspect, after the first VPLMN receives the information of the second VPLMN, the method further includes: sending the network selection priority of the second VPLMN to the first VPLMN, and the second VPLMN The network selection priority of the VPLMN is higher than the network selection priority of the first VPLMN.
结合第四方面，在第四方面的某些实现方式中，该方法还包括：从第一VPLMN接收第一指示信息，第一指示信息用于指示更新选网优先级。向第一VPLMN发送第二VPLMN的选网优先级，包括：向第一VPLMN发送更新后的选网优先级，更新后的选网优先级用于指示第二VPLMN的选网优先级高于第一VPLMN的选网优先级。In conjunction with the fourth aspect, in some implementations of the fourth aspect, the method further includes: receiving first indication information from the first VPLMN, where the first indication information is used to indicate updating the network selection priority. Sending the network selection priority of the second VPLMN to the first VPLMN includes: sending an updated network selection priority to the first VPLMN. The updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than that of the first VPLMN. A VPLMN network selection priority.
第五方面，提供了一种网络选择方法，应用于HPLMN的NSSF网元(以下称为HPLMN NSSF)，该方法包括：从HPLMN UDM接收终端设备的位置信息和HPLMN的一个或多个切片的信息，其中，HPLMN的一个或多个切片与终端设备请求在第一VPLMN接入的一个或多个切片具有映射关系。基于终端设备的位置信息和HPLMN的一个或多个切片的信息，确定候选VPLMN。In the fifth aspect, a network selection method is provided, which is applied to the NSSF network element of HPLMN (hereinafter referred to as HPLMN NSSF). The method includes: receiving the location information of the terminal device and the information of one or more slices of HPLMN from the HPLMN UDM. , wherein one or more slices of the HPLMN have a mapping relationship with one or more slices that the terminal device requests to access in the first VPLMN. Based on the location information of the terminal device and the information of one or more slices of the HPLMN, a candidate VPLMN is determined.
基于上述技术方案，HPLMN NSSF可以基于终端设备的位置信息和HPLMN的一个或多个切片的信息，为终端设备确定候选VPLMN，该候选VPLMN可以支持终端设备请求的全部切片或者部分切片，其中，与候选VPLMN支持的切片具有映射关系的HPLMN的切片包括部分与终端设备请求在第一VPLMN接入的切片具有映射关系的HPLMN的切片。Based on the above technical solution, the HPLMN NSSF can determine a candidate VPLMN for the terminal device based on the location information of the terminal device and the information of one or more slices of the HPLMN. The candidate VPLMN can support all slices or part of the slices requested by the terminal device, where, with The slices of the HPLMN that have a mapping relationship with the slices supported by the candidate VPLMN include some slices of the HPLMN that have a mapping relationship with the slices that the terminal device requests to access in the first VPLMN.
其中，候选VPLMN的数量为至少一个。The number of candidate VPLMNs is at least one.
在一种可能的情况下，候选VPLMN可以支持终端设备请求的全部切片。这种情况下的候选VPLMN可以对应上述第一方面和第三方面描述的第二VPLMN。在另一种可能的情况下，候选VPLMN可以支持终端设备请求的部分切片，这种情况下的候选VPLMN可以对应上述第二方面和第四方面描述的至少一个候选VPLMN，上述第二方面和第四方面描述的第二VPLMN为该至少一个候选VPLMN中的一个。In one possible case, the candidate VPLMN can support all slices requested by the end device. The candidate VPLMN in this case may correspond to the second VPLMN described in the first and third aspects above. In another possible case, the candidate VPLMN may support partial slices requested by the terminal device. In this case, the candidate VPLMN may correspond to at least one candidate VPLMN described in the above second and fourth aspects. The second VPLMN described in the four aspects is one of the at least one candidate VPLMN.
结合第五方面，在第五方面的某些实现方式中，确定候选VPLMN，包括：向一个或者多个其他VPLMN的NSSF网元发送第二消息，第二消息用于请求一个或者多个其他VPLMN中每个其他VPLMN支持的切片的信息。从一个或者多个其他VPLMN接收每个其他VPLMN支持的切片的信息。将与该一个或者多个其他VPLMN中支持的切片具有映射关系的HPLMN的切片包括部分与终端设备请求在第一VPLMN接入的切片具有映射关 系的HPLMN的切片的VPLMN确定为候选VPLMN。In conjunction with the fifth aspect, in some implementations of the fifth aspect, determining the candidate VPLMN includes: sending a second message to the NSSF network element of one or more other VPLMNs, where the second message is used to request one or more other VPLMNs. Information about each other slice supported by the VPLMN. Receives information from one or more other VPLMNs for each slice supported by the other VPLMN. The slice of the HPLMN that has a mapping relationship with the slices supported in the one or more other VPLMNs includes a portion that has a mapping relationship with the slice that the terminal device requests to access in the first VPLMN. The sliced VPLMN of the HPLMN is determined as the candidate VPLMN.
在本申请中，HPLMN NSSF可以通过与一个或者多个其他VPLMN的NSSF网元进行交互得到每个其他VPLMN在终端设备所在的位置部署的切片的信息，进而HPLMN NSSF可以根据每个其他VPLMN支持的切片与HPLMN的一个或多个切片的映射关系确定候选VPLMN。In this application, the HPLMN NSSF can obtain information about the slices deployed by each other VPLMN at the location of the terminal device by interacting with the NSSF network elements of one or more other VPLMNs, and then the HPLMN NSSF can obtain the slice information supported by each other VPLMN based on The mapping relationship between the slice and one or more slices of the HPLMN determines the candidate VPLMN.
结合第五方面，在第五方面的某些实现方式中，每个其他VPLMN支持的切片包括分别与HPLMN的一个或多个切片具有映射关系的切片。In conjunction with the fifth aspect, in some implementations of the fifth aspect, the slices supported by each other VPLMN include slices that respectively have a mapping relationship with one or more slices of the HPLMN.
在本申请中，与HPLMN NSSF交互的每个其他VPLMN支持的切片包括分别与HPLMN的一个或多个切片具有映射关系的切片，这样有利于减少与HPLMN NSSF交互的其他VPLMN的数量，从而有利于减少信令开销。In this application, the slices supported by each other VPLMN that interacts with the HPLMN NSSF include slices that have mapping relationships with one or more slices of the HPLMN respectively, which is beneficial to reducing the number of other VPLMNs interacting with the HPLMN NSSF, thereby benefiting Reduce signaling overhead.
结合第五方面，在第五方面的某些实现方式中，该方法还包括：当候选VPLMN在终端设备的位置支持HPLMN的一个或多个切片中的全部切片时，向HPLMN UDM发送候选VPLMN的信息。Combined with the fifth aspect, in some implementations of the fifth aspect, the method further includes: when the candidate VPLMN supports all slices in one or more slices of the HPLMN at the location of the terminal device, sending the candidate VPLMN to the HPLMN UDM. information.
在本申请中，候选VPLMN对应上述第一方面和第三方面描述的第二VPLMN，候选VPLMN在终端设备的位置支持的切片分别与HPLMN的一个或多个切片具有映射关系，其中，候选VPLMN的信息可以包括候选VPLMN的标识，候选VPLMN的信息可以指示HPLMN UDM调整候选VPLMN的选网优先级高于第一VPLMN的选网优先级，以使终端设备根据选网优先级接入第二VPLMN，更大程度地满足终端设备的业务需求。In this application, the candidate VPLMN corresponds to the second VPLMN described in the first and third aspects above, and the slices supported by the candidate VPLMN at the location of the terminal device respectively have a mapping relationship with one or more slices of the HPLMN, where the candidate VPLMN The information may include the identification of the candidate VPLMN. The information of the candidate VPLMN may instruct the HPLMN UDM to adjust the network selection priority of the candidate VPLMN to be higher than the network selection priority of the first VPLMN, so that the terminal device can access the second VPLMN according to the network selection priority. Meet the business needs of terminal equipment to a greater extent.
结合第五方面，在第五方面的某些实现方式中，该方法还包括：当候选VPLMN在终端设备的位置支持HPLMN的一个或多个切片中的部分切片时，向HPLMN UDM发送候选VPLMN的信息以及候选VPLMN支持的切片的信息。Combined with the fifth aspect, in some implementations of the fifth aspect, the method further includes: when the candidate VPLMN supports some of the one or more slices of the HPLMN at the location of the terminal device, sending the candidate VPLMN to the HPLMN UDM. information and information about the slices supported by the candidate VPLMN.
在本申请中，候选VPLMN对应上述第二方面和第四方面描述的至少一个候选VPLMN，该至少一个候选VPLMN在终端设备的位置支持的切片与HPLMN的一个或多个切片中的部分切片具有映射关系。HPLMN NSSF可以通过HPLMN UDM以及第一VPLMN向终端设备发送该至少一个候选VPLMN以及该至少一个候选VPLMN中每个候选VPLMN支持的切片的信息，以使终端设备从该至少一个候选VPLMN中选择出包括终端设备想要接入的切片的第二VPLMN，更大程度地满足终端设备的业务需求。In this application, the candidate VPLMN corresponds to at least one candidate VPLMN described in the above second and fourth aspects, and the slices supported by the at least one candidate VPLMN at the location of the terminal device have mappings with some of the one or more slices of the HPLMN. relation. The HPLMN NSSF may send the at least one candidate VPLMN and the slice information supported by each candidate VPLMN in the at least one candidate VPLMN to the terminal device through the HPLMN UDM and the first VPLMN, so that the terminal device selects from the at least one candidate VPLMN including The second VPLMN of the slice that the terminal device wants to access can meet the service needs of the terminal device to a greater extent.
第六方面，提供了一种网络选择方法，应用于终端设备，该方法包括：向第一VPLMN发送第一消息，第一消息用于请求接入第一VPLMN，第一消息包括终端设备请求在第一VPLMN接入的一个或多个切片。从第一VPLMN接收至少一个候选VPLMN的信息以及与至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN的切片的信息。从至少一个候选VPLMN中确定第二VPLMN。向第一VPLMN发送第二VPLMN的信息，以请求更新第二VPLMN的选网优先级。In a sixth aspect, a network selection method is provided, applied to a terminal device. The method includes: sending a first message to the first VPLMN, the first message is used to request access to the first VPLMN, and the first message includes the terminal device requesting access to the first VPLMN. One or more slices accessed by the first VPLMN. Information of at least one candidate VPLMN and information of slices of the HPLMN having a mapping relationship with slices supported by each candidate VPLMN in the at least one candidate VPLMN are received from the first VPLMN. A second VPLMN is determined from at least one candidate VPLMN. Send the information of the second VPLMN to the first VPLMN to request updating of the network selection priority of the second VPLMN.
其中，每个候选VPLMN支持终端设备请求的部分切片。与候选VPLMN支持的切片具有映射关系的HPLMN的切片包括部分与终端设备请求在第一VPLMN接入的切片具有映射关系的HPLMN的切片。Among them, each candidate VPLMN supports partial slices requested by the terminal device. The slices of the HPLMN that have a mapping relationship with the slices supported by the candidate VPLMN include some slices of the HPLMN that have a mapping relationship with the slices that the terminal device requests to access in the first VPLMN.
基于上述技术方案，终端设备在接收到至少一个候选VPLMN的信息以及与至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN的切片的信息之后，终端设备可以根据期望接入的切片从至少一个候选VPLMN中确定支持的切片包括期 望接入的切片的第二VPLMN，并通过第一VPLMN向HPLMN UDM发送第二VPLMN的信息，第二VPLMN的信息可以指示HPLMN UDM调整第二VPLMN的选网优先级高于第一VPLMN的选网优先级。这样有利于终端设备接入到期望请求的切片，满足终端设备的业务需求。Based on the above technical solution, after the terminal device receives the information of at least one candidate VPLMN and the slice information of the HPLMN that has a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN, the terminal device can access the slice according to the desired Determine supported slice inclusion periods from at least one candidate VPLMN The second VPLMN of the slice desired to access, and sends the information of the second VPLMN to the HPLMN UDM through the first VPLMN. The information of the second VPLMN can instruct the HPLMN UDM to adjust the network selection priority of the second VPLMN to be higher than that of the first VPLMN. network priority. This will help the terminal device access the desired slice and meet the business needs of the terminal device.
结合第六方面，在第六方面的某些实现方式中，从至少一个候选VPLMN中确定第二VPLMN，包括：根据用户的业务需求，从至少一个候选VPLMN中确定第二VPLMN。In conjunction with the sixth aspect, in some implementations of the sixth aspect, determining the second VPLMN from at least one candidate VPLMN includes: determining the second VPLMN from at least one candidate VPLMN according to the user's service requirements.
结合第六方面，在第六方面的某些实现方式中，从第一VPLMN接收第三消息，第三消息携带第二VPLMN的选网优先级。Combined with the sixth aspect, in some implementation manners of the sixth aspect, a third message is received from the first VPLMN, and the third message carries the network selection priority of the second VPLMN.
结合第六方面，在第六方面的某些实现方式中，第一消息还包括第二指示信息，第二指示信息用于指示若第一VPLMN不支持终端设备请求接入的切片中的至少一个，为终端设备寻找支持终端设备请求接入的全部切片的其他VPLMN的信息。In conjunction with the sixth aspect, in some implementations of the sixth aspect, the first message further includes second indication information, and the second indication information is used to indicate if the first VPLMN does not support at least one of the slices that the terminal device requests to access. , for the terminal device to find information about other VPLMNs that support all slices that the terminal device requests access to.
第七方面，提供了一种网络选择方法，应用于终端设备，该方法包括：向第一VPLMN发送第一消息，第一消息用于请求接入第一VPLMN，第一消息包括终端设备在第一VPLMN请求接入的一个或多个切片。In a seventh aspect, a network selection method is provided, which is applied to a terminal device. The method includes: sending a first message to the first VPLMN, where the first message is used to request access to the first VPLMN, and the first message includes whether the terminal device is connected to the first VPLMN. A VPLMN requests access to one or more slices.
其中，所述第一消息还用于指示若所述第一VPLMN不支持所述终端设备请求接入的切片中的至少一个，为所述终端设备寻找支持终端设备请求接入的全部切片的其他VPLMN的信息。Wherein, the first message is also used to indicate that if the first VPLMN does not support at least one of the slices that the terminal device requests to access, find other slices for the terminal device that support all the slices that the terminal device requests to access. VPLMN information.
在本申请中，第一消息可以指示网络为终端设备寻找支持终端设备请求接入的全部切片的其他VPLMN的信息。这样，在第一VPLMN不支持所述终端设备请求接入的切片中的至少一个的情况下，网络可以基于第一消息为终端设备寻找支持终端设备请求接入的全部切片的其他VPLMN的信息，这样有利于提高终端设备接入请求的全部切片的可能性，更大程度地满足终端设备的业务需求，提升使用体验。In this application, the first message may instruct the network to find information for the terminal device on other VPLMNs that support all slices that the terminal device requests access to. In this way, when the first VPLMN does not support at least one of the slices that the terminal device requests to access, the network can search for information about other VPLMNs that support all slices that the terminal device requests to access based on the first message, This will help improve the possibility of all slices accessed by the terminal device, meet the business needs of the terminal device to a greater extent, and improve the user experience.
第八方面，提供一种网络选择装置，包括：收发模块和确定模块。其中，收发模块用于：从终端设备接收第一消息，第一消息用于请求接入第一VPLMN，第一消息包括终端设备请求在第一VPLMN接入的一个或多个切片。确定模块用于：确定是否支持终端设备请求接入的全部切片。收发模块还用于：在不支持终端设备请求接入的切片中的至少一个的情况下，向HPLMN UDM发送终端设备的位置信息和HPLMN的一个或多个切片的信息，其中，HPLMN的一个或多个切片与终端设备请求在第一VPLMN接入的一个或多个切片具有映射关系；从HPLMN UDM接收第二VPLMN的选网优先级，第二VPLMN的选网优先级高于所述第一VPLMN的选网优先级，第二VPLMN支持的切片包括分别与HPLMN的一个或多个切片具有映射关系的切片；以及，向终端设备发送第二VPLMN的选网优先级。In an eighth aspect, a network selection device is provided, including: a transceiver module and a determination module. Wherein, the transceiver module is configured to: receive a first message from the terminal device, the first message is used to request access to the first VPLMN, and the first message includes one or more slices that the terminal device requests to access in the first VPLMN. The determination module is used to: determine whether all slices requested to be accessed by the terminal device are supported. The transceiver module is also used to: when at least one of the slices requested by the terminal device to access is not supported, send the location information of the terminal device and the information of one or more slices of the HPLMN to the HPLMN UDM, where one or more slices of the HPLMN Multiple slices have a mapping relationship with one or more slices requested by the terminal device to access the first VPLMN; the network selection priority of the second VPLMN is received from the HPLMN UDM, and the network selection priority of the second VPLMN is higher than the first The network selection priority of the VPLMN, the slices supported by the second VPLMN include slices that respectively have a mapping relationship with one or more slices of the HPLMN; and the network selection priority of the second VPLMN is sent to the terminal device.
结合第八方面，在第八方面的某些实现方式中，收发模块用于：向HPLMN UDM发送第一指示信息，第一指示信息用于指示更新选网优先级；以及，从HPLMN UDM接收更新后的选网优先级，更新后的选网优先级用于指示第二VPLMN的选网优先级高于第一VPLMN的选网优先级。Combined with the eighth aspect, in some implementations of the eighth aspect, the transceiver module is configured to: send first indication information to HPLMN UDM, where the first indication information is used to indicate updating the network selection priority; and, receive updates from HPLMN UDM The updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
结合第八方面，在第八方面的某些实现方式中，收发模块用于：在确定不支持所述终端设备请求接入的切片中的至少一个的情况下，向UDM发送所述第一指示信息。In conjunction with the eighth aspect, in some implementations of the eighth aspect, the transceiver module is configured to: send the first indication to the UDM when it is determined that at least one of the slices requested by the terminal device to access is not supported. information.
结合第八方面，在第八方面的某些实现方式中，第一消息还包括第二指示信息，第二 指示信息用于指示若第一VPLMN不支持终端设备请求接入的切片中的至少一个，为终端设备寻找支持终端设备请求接入的全部切片的其他VPLMN的信息。Combined with the eighth aspect, in some implementations of the eighth aspect, the first message further includes second indication information, and the second The indication information is used to indicate that if the first VPLMN does not support at least one of the slices that the terminal device requests to access, find for the terminal device information about other VPLMNs that support all slices that the terminal device requests to access.
第九方面，提供一种网络选择装置，包括：收发模块和确定模块。其中，收发模块用于：从终端设备接收第一消息，第一消息用于请求接入第一VPLMN，第一消息包括终端设备请求在第一VPLMN接入的一个或多个切片。确定模块用于：确定是否支持终端设备请求接入的全部切片。收发模块还用于：在不支持终端设备请求接入的切片中的至少一个的情况下，向HPLMN UDM发送终端设备的位置信息和HPLMN的一个或多个切片的信息，其中，HPLMN的一个或多个切片与终端设备请求在第一VPLMN接入的一个或多个切片具有映射关系；从HPLMN UDM接收至少一个候选VPLMN的信息以及与至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN的切片的信息，在终端设备请求接入的一个或多个切片中，与该至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN的切片包括部分与终端设备请求在第一VPLMN接入的切片具有映射关系的HPLMN的切片；向终端设备发送至少一个候选VPLMN的信息以及与每个候选VPLMN支持的切片具有映射关系的HPLMN的切片的信息；从终端设备接收第二VPLMN的信息，第二VPLMN为至少一个候选VPLMN中的一个；以及，向HPLMN UDM发送第二VPLMN的信息，以请求更新第二VPLMN的选网优先级。In a ninth aspect, a network selection device is provided, including: a transceiver module and a determination module. Wherein, the transceiver module is configured to: receive a first message from the terminal device, the first message is used to request access to the first VPLMN, and the first message includes one or more slices that the terminal device requests to access in the first VPLMN. The determination module is used to: determine whether all slices requested to be accessed by the terminal device are supported. The transceiver module is also used to: when at least one of the slices requested by the terminal device to access is not supported, send the location information of the terminal device and the information of one or more slices of the HPLMN to the HPLMN UDM, where one or more slices of the HPLMN Multiple slices have a mapping relationship with one or more slices requested by the terminal device to access the first VPLMN; information of at least one candidate VPLMN is received from the HPLMN UDM and has a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN Information about the slices of the HPLMN. In one or more slices that the terminal device requests access to, the slices of the HPLMN that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN include part of the slice that the terminal device requested in the first. A slice of a VPLMN accessed by a slice of an HPLMN with a mapping relationship; sending information of at least one candidate VPLMN and information of a slice of the HPLMN that has a mapping relationship with a slice supported by each candidate VPLMN to the terminal device; receiving a second VPLMN from the terminal device information that the second VPLMN is one of at least one candidate VPLMN; and, sending the information of the second VPLMN to the HPLMN UDM to request an update of the network selection priority of the second VPLMN.
结合第九方面，在第九方面的某些实现方式中，收发模块用于：从HPLMN UDM接收第二VPLMN的选网优先级，第二VPLMN的选网优先级高于第一VPLMN的选网优先级；以及，向终端设备发送第二VPLMN的选网优先级。Combined with the ninth aspect, in some implementations of the ninth aspect, the transceiver module is used to: receive the network selection priority of the second VPLMN from the HPLMN UDM, and the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN priority; and, sending the network selection priority of the second VPLMN to the terminal device.
结合第九方面，在第九方面的某些实现方式中，向HPLMN UDM发送第一指示信息，第一指示信息用于指示更新选网优先级；以及，从HPLMN UDM接收更新后的选网优先级，更新后的选网优先级用于指示第二VPLMN的选网优先级高于第一VPLMN的选网优先级。Combined with the ninth aspect, in some implementations of the ninth aspect, sending first indication information to HPLMN UDM, the first indication information is used to indicate updating the network selection priority; and receiving the updated network selection priority from HPLMN UDM level, the updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
结合第九方面，在第九方面的某些实现方式中，在确定第一VPLMN不支持请求接入的切片中的至少一个的情况下，向HPLMN UDM发送第一指示信息。Combined with the ninth aspect, in some implementations of the ninth aspect, when it is determined that the first VPLMN does not support at least one of the slices requested for access, the first indication information is sent to the HPLMN UDM.
结合第九方面，在第九方面的某些实现方式中，第一消息还包括第二指示信息，第二指示信息用于指示若第一VPLMN不支持终端设备请求接入的切片中的至少一个，为终端设备寻找支持终端设备请求接入的全部切片的其他VPLMN的信息。In conjunction with the ninth aspect, in some implementations of the ninth aspect, the first message further includes second indication information, and the second indication information is used to indicate if the first VPLMN does not support at least one of the slices that the terminal device requests to access. , for the terminal device to find information about other VPLMNs that support all slices that the terminal device requests access to.
第十方面，提供一种网络选择装置，包括：收发模块和确定模块。其中，收发模块用于：从第一VPLMN接收终端设备的位置信息和HPLMN的一个或多个切片的信息，其中，HPLMN的一个或多个切片与终端设备请求在第一VPLMN接入的一个或多个切片具有映射关系；向HPLMN NSSF发送终端设备的位置信息和HPLMN的一个或多个切片的信息；从HPLMN NSSF接收第二VPLMN的信息，第二VPLMN支持的切片包括分别与HPLMN的一个或多个切片具有映射关系的切片；确定模块用于：确定第二VPLMN的选网优先级。收发模块还用于：向第一VPLMN发送第二VPLMN的选网优先级，第二VPLMN的选网优先级高于第一VPLMN的选网优先级。In a tenth aspect, a network selection device is provided, including: a transceiver module and a determination module. Wherein, the transceiver module is configured to: receive the location information of the terminal device and the information of one or more slices of the HPLMN from the first VPLMN, where the one or more slices of the HPLMN are related to the one or more slices that the terminal device requests to access in the first VPLMN. Multiple slices have a mapping relationship; send the location information of the terminal device and the information of one or more slices of the HPLMN to the HPLMN NSSF; receive the information of the second VPLMN from the HPLMN NSSF, and the slices supported by the second VPLMN include one or more slices respectively with the HPLMN Multiple slices have a mapping relationship; the determination module is used to: determine the network selection priority of the second VPLMN. The transceiver module is also configured to: send the network selection priority of the second VPLMN to the first VPLMN, and the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
结合第十方面，在第十方面的某些实现方式中，收发模块用于：从第一VPLMN接收第一指示信息，第一指示信息用于指示更新选网优先级；以及，向第一VPLMN发送更新后的选网优先级，更新后的选网优先级用于指示第二VPLMN的选网优先级高于第一 VPLMN的选网优先级。In conjunction with the tenth aspect, in some implementations of the tenth aspect, the transceiver module is configured to: receive first indication information from the first VPLMN, where the first indication information is used to indicate updating the network selection priority; and, to the first VPLMN Send the updated network selection priority. The updated network selection priority is used to indicate that the second VPLMN has a higher network selection priority than the first. VPLMN network selection priority.
第十一方面，提供一种网络选择装置，包括：收发模块和确定模块。其中，收发模块用于：从第一VPLMN接收终端设备的位置信息和HPLMN的一个或多个切片的信息，其中，HPLMN的一个或多个切片与终端设备请求在第一VPLMN接入的一个或多个切片具有映射关系；向HPLMN NSSF发送终端设备的位置信息和HPLMN的一个或多个切片的信息；从HPLMN NSSF接收至少一个候选VPLMN的信息以及与至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN的切片的信息，在终端设备请求接入的一个或多个切片中，其中，与每个候选VPLMN支持的切片具有映射关系的HPLMN的切片包括部分与终端设备请求在第一VPLMN接入的切片具有映射关系的HPLMN的切片；向第一VPLMN发送至少一个候选VPLMN的信息以及与每个候选VPLMN支持的切片具有映射关系的HPLMN的切片的信息；以及，从第一VPLMN接收第二VPLMN的信息，第二VPLMN为至少一个候选VPLMN中的一个。确定模块用于：确定第二VPLMN的选网优先级。In an eleventh aspect, a network selection device is provided, including: a transceiver module and a determination module. Wherein, the transceiver module is configured to: receive the location information of the terminal device and the information of one or more slices of the HPLMN from the first VPLMN, where the one or more slices of the HPLMN are related to the one or more slices that the terminal device requests to access in the first VPLMN. Multiple slices have a mapping relationship; send the location information of the terminal device and the information of one or more slices of the HPLMN to the HPLMN NSSF; receive the information of at least one candidate VPLMN and the information of at least one candidate VPLMN supported by each candidate VPLMN from the HPLMN NSSF Slice information of HPLMN slices that have a mapping relationship, in one or more slices that the terminal device requests access to, wherein the slices of the HPLMN that have a mapping relationship with the slices supported by each candidate VPLMN include part of the slices that the terminal device requests in the first slice. A slice of a VPLMN accessed by a slice of an HPLMN with a mapping relationship; sending to the first VPLMN information of at least one candidate VPLMN and information of a slice of the HPLMN that has a mapping relationship with the slices supported by each candidate VPLMN; and, from the first VPLMN Receive information of the second VPLMN, where the second VPLMN is one of at least one candidate VPLMN. The determining module is used to determine the network selection priority of the second VPLMN.
结合第十一方面，在第十一方面的某些实现方式中，收发模块用于：向第一VPLMN发送第二VPLMN的选网优先级，第二VPLMN的选网优先级高于第一VPLMN的选网优先级。Combined with the eleventh aspect, in some implementations of the eleventh aspect, the transceiver module is configured to: send the network selection priority of the second VPLMN to the first VPLMN, and the network selection priority of the second VPLMN is higher than that of the first VPLMN. The network selection priority.
结合第十一方面，在第十一方面的某些实现方式中，收发模块用于：从第一VPLMN接收第一指示信息，第一指示信息用于指示更新选网优先级；以及，向第一VPLMN发送更新后的选网优先级，更新后的选网优先级用于指示第二VPLMN的选网优先级高于第一VPLMN的选网优先级。In conjunction with the eleventh aspect, in some implementations of the eleventh aspect, the transceiver module is configured to: receive first indication information from the first VPLMN, where the first indication information is used to indicate updating the network selection priority; and, to the first VPLMN; The first VPLMN sends an updated network selection priority, and the updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
第十二方面，提供一种网络选择装置，包括：收发模块和确定模块。其中，收发模块用于：HPLMN UDM接收终端设备的位置信息和HPLMN的一个或多个切片的信息，其中，HPLMN的一个或多个切片与终端设备请求在第一VPLMN接入的一个或多个切片具有映射关系。确定模块用于：基于终端设备的位置信息和HPLMN的一个或多个切片的信息，确定VPLMN，其中，与该至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN的切片包括部分与终端设备请求在第一VPLMN接入的切片具有映射关系的HPLMN的切片。In a twelfth aspect, a network selection device is provided, including: a transceiver module and a determination module. Wherein, the transceiver module is used for: HPLMN UDM receives the location information of the terminal device and the information of one or more slices of HPLMN, wherein the one or more slices of HPLMN are related to one or more slices of the first VPLMN requested by the terminal device. Slices have mapping relationships. The determining module is configured to: determine the VPLMN based on the location information of the terminal device and the information of one or more slices of the HPLMN, wherein the slices of the HPLMN that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN include parts The slice of the HPLMN that has a mapping relationship with the slice that the terminal device requests to access in the first VPLMN.
结合第十二方面，在第十二方面的某些实现方式中，收发模块用于：向一个或者多个其他VPLMN NSSF发送第二消息，第二消息用于请求该一个或者多个其他VPLMN中每个其他VPLMN支持的切片的信息；以及，从该一个或者多个其他VPLMN接收每个其他VPLMN支持的切片的信息。确定模块用于：将与该一个或者多个其他VPLMN中支持的切片具有映射关系的HPLMN的切片包括部分与终端设备请求在第一VPLMN接入的切片具有映射关系的HPLMN的切片的VPLMN确定为候选VPLMN。Combined with the twelfth aspect, in some implementations of the twelfth aspect, the transceiver module is used to: send a second message to one or more other VPLMN NSSFs, and the second message is used to request the one or more other VPLMNs. Information about slices supported by each other VPLMN; and receiving information about slices supported by each other VPLMN from the one or more other VPLMNs. The determining module is configured to: determine the VPLMN of the slice of the HPLMN that has a mapping relationship with the slices supported in the one or more other VPLMNs, including a portion of the slice of the HPLMN that has a mapping relationship with the slice that the terminal device requests to access in the first VPLMN as Candidate VPLMN.
结合第十二方面，在第十二方面的某些实现方式中，每个其他VPLMN支持的切片包括与HPLMN的一个或多个切片具有映射关系的切片。In conjunction with the twelfth aspect, in some implementations of the twelfth aspect, each other VPLMN-supported slice includes a slice that has a mapping relationship with one or more slices of the HPLMN.
结合第十二方面，在第十二方面的某些实现方式中，当候选VPLMN在终端设备的位置支持HPLMN的一个或多个切片中的全部切片时，向HPLMN UDM发送候选VPLMN的信息。Combined with the twelfth aspect, in some implementations of the twelfth aspect, when the candidate VPLMN supports all slices in one or more slices of the HPLMN at the location of the terminal device, information of the candidate VPLMN is sent to the HPLMN UDM.
结合第十二方面，在第十二方面的某些实现方式中，当候选VPLMN在终端设备的位 置支持HPLMN的一个或多个切片中的部分切片时，向HPLMN UDM发送候选VPLMN的信息以及候选VPLMN支持的切片的信息。Combined with the twelfth aspect, in some implementations of the twelfth aspect, when the candidate VPLMN is at the location of the terminal device When configuring some slices in one or more slices that support HPLMN, send the information of the candidate VPLMN and the information of the slices supported by the candidate VPLMN to the HPLMN UDM.
第十三方面，提供一种网络选择装置，包括：收发模块和确定模块。其中，收发模块用于：向第一VPLMN发送第一消息，第一消息用于请求接入第一VPLMN，第一消息包括终端设备请求在第一VPLMN接入的一个或多个切片；从第一VPLMN接收至少一个候选VPLMN的信息以及与至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN的切片的信息，与候选VPLMN支持的切片具有映射关系的HPLMN的切片包括部分与终端设备请求在第一VPLMN接入的切片具有映射关系的HPLMN的切片。确定模块用于：从至少一个候选VPLMN中确定第二VPLMN。收发模块还用于：向第一VPLMN发送第二VPLMN的信息，以请求更新第二VPLMN的选网优先级。In a thirteenth aspect, a network selection device is provided, including: a transceiver module and a determination module. Wherein, the transceiver module is configured to: send a first message to the first VPLMN, the first message is used to request access to the first VPLMN, and the first message includes one or more slices that the terminal device requests to access in the first VPLMN; A VPLMN receives information of at least one candidate VPLMN and information of HPLMN slices that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN. The slices of the HPLMN that have a mapping relationship with the slices supported by the candidate VPLMN include parts with the terminal. The device requests an HPLMN slice that has a mapping relationship with the slice accessed by the first VPLMN. The determining module is configured to: determine a second VPLMN from at least one candidate VPLMN. The transceiver module is also used to: send the information of the second VPLMN to the first VPLMN to request to update the network selection priority of the second VPLMN.
结合第十三方面，在第十三方面的某些实现方式中，确定模块用于：根据用户的业务需求，从该至少一个候选VPLMN中确定第二VPLMN。In conjunction with the thirteenth aspect, in some implementations of the thirteenth aspect, the determining module is configured to: determine the second VPLMN from the at least one candidate VPLMN according to the user's service requirements.
结合第十三方面，在第十三方面的某些实现方式中，收发模块用于：从第一VPLMN接收第三消息，第三消息携带第二VPLMN的选网优先级。Combined with the thirteenth aspect, in some implementation manners of the thirteenth aspect, the transceiver module is configured to: receive a third message from the first VPLMN, where the third message carries the network selection priority of the second VPLMN.
结合第十三方面，在第十三方面的某些实现方式中，第一消息还包括第二指示信息，第二指示信息用于指示若第一VPLMN不支持终端设备请求接入的切片中的至少一个，为终端设备寻找支持终端设备请求接入的全部切片的其他VPLMN的信息。In conjunction with the thirteenth aspect, in some implementations of the thirteenth aspect, the first message further includes second indication information, and the second indication information is used to indicate if the first VPLMN does not support the slice in the slice requested by the terminal device to access. At least one, searching for the terminal device information of other VPLMNs that support all slices that the terminal device requests to access.
第十四方面，提供一种网络选择装置，包括：确定模块和收发模块。其中，确定模块用于：确定第一消息，第一消息用于请求接入第一VPLMN，第一消息包括终端设备在第一VPLMN请求接入的一个或多个切片。收发模块用于：向第一VPLMN发送第一消息。其中，第一消息还用于指示若第一VPLMN不支持终端设备请求接入的切片中的至少一个，为终端设备寻找支持终端设备请求接入的全部切片的其他VPLMN的信息。In a fourteenth aspect, a network selection device is provided, including: a determination module and a transceiver module. Wherein, the determining module is configured to: determine a first message, the first message is used to request access to the first VPLMN, and the first message includes one or more slices that the terminal device requests access to in the first VPLMN. The transceiver module is configured to: send the first message to the first VPLMN. The first message is also used to indicate that if the first VPLMN does not support at least one of the slices that the terminal device requests to access, find information for the terminal device about other VPLMNs that support all slices that the terminal device requests to access.
第十五方面，提供了另一种网络选择装置，包括处理器，该处理器与存储器耦合，可用于执行存储器中的指令，以实现上述任一方面中任一种可能实现方式中的方法。可选地，该装置还包括存储器。可选地，该装置还包括通信接口，处理器与通信接口耦合。In a fifteenth aspect, another network selection device is provided, including a processor, which is coupled to a memory and can be used to execute instructions in the memory to implement the method in any of the possible implementation manners of any of the above aspects. Optionally, the device further includes memory. Optionally, the device further includes a communication interface, and the processor is coupled to the communication interface.
在一种实现方式中，该网络选择装置为第一VPLMN的AMF网元、HPLMN的UDM网元、HPLMN的NSSF网元或者终端设备。当该网络选择装置为第一VPLMN的AMF网元、HPLMN的UDM网元、HPLMN的NSSF网元或者终端设备时，通信接口可以是收发器，或，输入/输出接口。In an implementation manner, the network selection device is an AMF network element of the first VPLMN, a UDM network element of the HPLMN, an NSSF network element of the HPLMN, or a terminal device. When the network selection device is the AMF network element of the first VPLMN, the UDM network element of the HPLMN, the NSSF network element of the HPLMN, or a terminal device, the communication interface may be a transceiver, or an input/output interface.
在另一种实现方式中，该网络选择装置为配置于第一VPLMN的AMF网元、HPLMN的UDM网元、HPLMN的NSSF网元或者终端设备中的芯片。当该网络选择装置为配置于第一VPLMN的AMF网元、HPLMN的UDM网元、HPLMN的NSSF网元或者终端设备中的芯片时，通信接口可以是输入/输出接口。In another implementation manner, the network selection device is a chip configured in the AMF network element of the first VPLMN, the UDM network element of the HPLMN, the NSSF network element of the HPLMN, or the terminal equipment. When the network selection device is a chip configured in the AMF network element of the first VPLMN, the UDM network element of the HPLMN, the NSSF network element of the HPLMN, or the terminal device, the communication interface may be an input/output interface.
第十六方面，提供了一种处理器，包括：输入电路、输出电路和处理电路。处理电路用于通过输入电路接收信号，并通过输出电路发射信号，使得处理器执行上述任一方面中任一种可能实现方式中的方法。In a sixteenth aspect, a processor is provided, including: an input circuit, an output circuit and a processing circuit. The processing circuit is configured to receive signals through the input circuit and transmit signals through the output circuit, so that the processor performs the method in any of the possible implementations of any of the above aspects.
在具体实现过程中，上述处理器可以为芯片，输入电路可以为输入管脚，输出电路可以为输出管脚，处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。输入电路所接收的输入的信号可以是由例如但不限于接收器接收并输入的，输出电路所输出的信号可 以是例如但不限于输出给发射器并由发射器发射的，且输入电路和输出电路可以是同一电路，该电路在不同的时刻分别用作输入电路和输出电路。本申请对处理器及各种电路的具体实现方式不做限定。In the specific implementation process, the above-mentioned processor can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be For example, but not limited to, the circuit is output to and transmitted by the transmitter, and the input circuit and the output circuit may be the same circuit, which is used as an input circuit and an output circuit respectively at different times. This application does not limit the specific implementation methods of the processor and various circuits.
第十七方面，提供了一种处理装置，包括处理器和存储器。该处理器用于读取存储器中存储的指令，并可通过接收器接收信号，通过发射器发射信号，以执行上述任一方面中任一种可能实现方式中的方法。In a seventeenth aspect, a processing device is provided, including a processor and a memory. The processor is used to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter to execute the method in any of the possible implementations of any of the above aspects.
可选地，处理器为一个或多个，存储器为一个或多个。Optionally, there are one or more processors and one or more memories.
可选地，存储器可以与处理器集成在一起，或者存储器与处理器分离设置。Alternatively, the memory may be integrated with the processor, or the memory may be provided separately from the processor.
在具体实现过程中，存储器可以为非瞬时性(non-transitory)存储器，例如只读存储器(read only memory，ROM)，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请对存储器的类型以及存储器与处理器的设置方式不做限定。In the specific implementation process, the memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated on the same chip as the processor, or can be set in different On the chip, this application does not limit the type of memory and the arrangement of the memory and the processor.
应理解，相关的数据交互过程例如发送指示信息可以为从处理器输出指示信息的过程，接收能力信息可以为处理器接收输入能力信息的过程。具体地，处理输出的数据可以输出给发射器，处理器接收的输入数据可以来自接收器。其中，发射器和接收器可以统称为收发器。It should be understood that the relevant data interaction process, for example, sending instruction information may be a process of outputting instruction information from the processor, and receiving capability information may be a process of the processor receiving input capability information. Specifically, the data output by the processing can be output to the transmitter, and the input data received by the processor can come from the receiver. Among them, the transmitter and receiver can be collectively called a transceiver.
上述第十七方面中的处理装置可以是一个芯片，该处理器可以通过硬件来实现也可以通过软件来实现，当通过硬件实现时，该处理器可以是逻辑电路、集成电路等；当通过软件来实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现，该存储器可以集成在处理器中，可以位于该处理器之外，独立存在。The processing device in the seventeenth aspect above can be a chip, and the processor can be implemented by hardware or software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software When implemented, the processor can be a general-purpose processor, which is implemented by reading the software code stored in the memory. The memory can be integrated in the processor, or can be located outside the processor and exist independently.
第十八方面，提供了一种计算机程序产品，计算机程序产品包括：计算机程序代码，当该计算机程序代码被运行时，使得计算机执行上述任一方面中任一种可能实现方式中的方法。In an eighteenth aspect, a computer program product is provided. The computer program product includes: computer program code. When the computer program code is run, it causes the computer to execute the method in any of the possible implementation manners of any of the above aspects.
第十九方面，提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，当该计算机程序被运行时，使得计算机执行上述任一方面中任一种可能实现方式中的方法。In a nineteenth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program. When the computer program is run, it causes the computer to execute any of the possible implementation methods of any of the above aspects. method.
附图说明Description of drawings
图1是一种漫游场景下的切片映射的示意图；Figure 1 is a schematic diagram of slice mapping in a roaming scenario;
图2是适用于本申请实施例的一种网络架构的示意图；Figure 2 is a schematic diagram of a network architecture suitable for embodiments of the present application;
图3是适用于本申请实施例的另一种网络架构的示意图；Figure 3 is a schematic diagram of another network architecture suitable for embodiments of the present application;
图4是本申请实施例适用的一种终端设备的结构示意图；Figure 4 is a schematic structural diagram of a terminal device applicable to the embodiment of the present application;
图5是本申请实施例提供的一种网络选择方法的示意性流程图；Figure 5 is a schematic flow chart of a network selection method provided by an embodiment of the present application;
图6是本申请实施例提供的另一种网络选择方法的示意性流程图；Figure 6 is a schematic flow chart of another network selection method provided by an embodiment of the present application;
图7是本申请实施例提供的再一种网络选择方法的示意性流程图；Figure 7 is a schematic flow chart of yet another network selection method provided by an embodiment of the present application;
图8是本申请实施例提供的又一种网络选择方法的示意性流程图；Figure 8 is a schematic flow chart of yet another network selection method provided by an embodiment of the present application;
图9是本申请实施例提供的一种网络选择装置的示意性框图；Figure 9 is a schematic block diagram of a network selection device provided by an embodiment of the present application;
图10是本申请实施例提供的另一种网络选择装置的示意性框图。Figure 10 is a schematic block diagram of another network selection device provided by an embodiment of the present application.
具体实施方式 Detailed ways
下面将结合附图，对本申请中的技术方案进行描述。The technical solutions in this application will be described below with reference to the accompanying drawings.
为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。例如，第一PLMN和第二PLMN是为了区分不同的PLMN，第一消息和第二消息是为了区分不同的消息，并不对其先后顺序进行限定。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。In order to facilitate a clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as “first” and “second” are used to distinguish the same or similar items with basically the same functions and effects. For example, the first PLMN and the second PLMN are used to distinguish different PLMNs, and the first message and the second message are used to distinguish different messages, and their order is not limited. Those skilled in the art can understand that words such as "first" and "second" do not limit the number and execution order, and words such as "first" and "second" do not limit the number and execution order.
需要说明的是，本申请中，“示例性地”或者“例如”等词用于表示作例子、例证或说明。本申请中被描述为“示例性地”或者“例如”的任何实施例或设计方案不应被解释为比其他实施例或设计方案更优选或更具优势。确切而言，使用“示例性地”或者“例如”等词旨在以具体方式呈现相关概念。It should be noted that in this application, words such as "exemplarily" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "such as" is not intended to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the words "exemplarily" or "for example" is intended to present the relevant concepts in a concrete manner.
此外，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a、b和c中的至少一项(个)，可以表示：a，或b，或c，或a和b，或a和c，或b和c，或a、b和c，其中a，b，c可以是单个，也可以是多个。In addition, "at least one" means one or more, and "plurality" means two or more. "And/or" describes the association of associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the related objects are in an "or" relationship. "At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items). For example, at least one of a, b and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c, where a, b, c can be single or multiple.
为便于理解，下面对本申请实施例所涉及的术语进行简单介绍。To facilitate understanding, the terms involved in the embodiments of this application are briefly introduced below.
1.网络切片(network slice)1. Network slice
5G时代有数以千亿的物联网设备接入网络，不同类型的应用场景对网络的需求是差异化的，有的甚至是相互冲突的。通过单一网络同时为不同类型的应用场景提供服务，可能会导致网络架构异常复杂，网络管理效率和资源利用率低下。5G网络切片技术通过在同一网络基础设施上虚拟独立逻辑网络的方式为不同的应用场景提供相互隔离的网络环境，使得不同应用场景可以按照各自的需求定制网络功能和特性，能够切实保障不同业务的QoS需求。In the 5G era, hundreds of billions of IoT devices are connected to the network. Different types of application scenarios have different demands on the network, and some even conflict with each other. Providing services for different types of application scenarios through a single network at the same time may lead to extremely complex network architecture and low network management efficiency and resource utilization. 5G network slicing technology provides isolated network environments for different application scenarios by virtualizing independent logical networks on the same network infrastructure, allowing different application scenarios to customize network functions and characteristics according to their own needs, and effectively guarantee the security of different services. QoS requirements.
5G网络切片要实现的目标是将终端设备、接入网资源、核心网资源以及网络运维和管理***等进行有机组合，为不同商业场景或者业务类型提供能够独立运维的、相互隔离的完整网络。多种多样的场景对第三代移动通信项目(3rd generation partnership project，3GPP)生态***提出了不同的需要，例如，计费、策略、安全、移动性等。3GPP强调了网络切片之间不相互影响，例如突发的大量的抄表业务不应该影响正常的移动宽带业务。为了满足多样性需求和切片间的隔离，需要业务间相对独立的管理和运维，并提供量身定做的业务功能和分析能力。不同类型业务的实例部署在不同的网络切片上，相同业务类型的不同实例也可部署在不同的网络切片上。The goal of 5G network slicing is to organically combine terminal equipment, access network resources, core network resources, and network operation and management systems to provide different business scenarios or business types with a complete and mutually isolated network that can be independently operated and maintained. network. A variety of scenarios have put forward different needs for the third generation mobile communication project (3rd generation partnership project, 3GPP) ecosystem, such as billing, policy, security, mobility, etc. 3GPP emphasizes that network slices should not affect each other. For example, a sudden large number of meter reading services should not affect normal mobile broadband services. In order to meet the diverse needs and isolation between slices, relatively independent management and operation and maintenance between businesses are required, and tailor-made business functions and analysis capabilities are provided. Instances of different types of services are deployed on different network slices, and different instances of the same service type can also be deployed on different network slices.
当核心网部署了网络切片，如果用户初始附着到网络时，会触发网络切片的选择过程。网络切片的选择过程需要考虑的参数包括：用户的签约数据、本地配置信息、漫游协议、运营商的策略等，综合考虑上述参数可以为终端设备选择合适的切片类型。When the core network deploys network slicing, the network slice selection process will be triggered when a user initially attaches to the network. Parameters that need to be considered in the network slicing selection process include: user subscription data, local configuration information, roaming agreements, operator policies, etc. Taking the above parameters into consideration, the appropriate slicing type can be selected for the terminal device.
本申请实施例中可以将网络切片简称为切片。In the embodiment of this application, network slicing may be referred to as slice for short.
2.网络切片的标识2. Identification of network slices
单个网络切片选择辅助信息(single network slice selection assistance information，S- NSSAI)用于标识单个网络切片。S-NSSAI包括切片类型/业务类型(slice/service type，SST)和切片差异化标识(slice differentiator，SD)，其中，SST用于描述网络切片的特性和业务方面的特征；SD用于区分具有相同SST特征的不同网络切片。Single network slice selection assistance information (S- NSSAI) is used to identify a single network slice. S-NSSAI includes slice type/service type (SST) and slice differentiator (SD). SST is used to describe the characteristics and service characteristics of network slices; SD is used to distinguish features with Different network slices of the same SST features.
网络切片选择辅助信息(network slice selection assistance information，NSSAI)是一组S-NSSAI的集合，用于标识多个网络切片。终端设备可以向核心网提供由一组参数组成的NSSAI，为使核心网为终端设备选择网络切片实例。NSSAI可以是标准化的值或者PLMN内的特定值。Network slice selection assistance information (NSSAI) is a set of S-NSSAI used to identify multiple network slices. The terminal device can provide the NSSAI consisting of a set of parameters to the core network to enable the core network to select a network slicing instance for the terminal device. NSSAI can be a standardized value or a specific value within the PLMN.
5G网络中的NSSAI可以是配置的NSSAI(configured NSSAI)、请求的NSSAI(requested NSSAI)或者允许的NSSAI(allowed NSSAI)。NSSAI in the 5G network can be configured NSSAI (configured NSSAI), requested NSSAI (requested NSSAI) or allowed NSSAI (allowed NSSAI).
其中，当终端设备需要接入到某个网络切片时，终端设备可以向核心网提供请求的NSSAI，用于核心网为终端设备选择网络切片实例。无线接入网(radio access network，RAN)根据无线资源控制(radio resource control，RRC)层中终端设备携带的请求的NSSAI(Requested NSSAI)向核心网发送初始入网请求消息。在终端设备附着到核心网中的当前的PLMN之后，当前的PLMN根据终端设备的签约数据、漫游协议以及本地配置等信息综合判断，通过注册接受消息为终端设备返回当前的PLMN允许的NSSAI，用于后续终端设备发起业务请求时将该允许的NSSAI发送至核心网。When the terminal device needs to access a certain network slice, the terminal device can provide the requested NSSAI to the core network, which is used by the core network to select a network slice instance for the terminal device. The radio access network (RAN) sends an initial network access request message to the core network based on the requested NSSAI (Requested NSSAI) carried by the terminal device in the radio resource control (RRC) layer. After the terminal device is attached to the current PLMN in the core network, the current PLMN makes a comprehensive judgment based on the terminal device's subscription data, roaming agreement, local configuration and other information, and returns the NSSAI allowed by the current PLMN to the terminal device through the registration acceptance message, using When the subsequent terminal device initiates a service request, the allowed NSSAI is sent to the core network.
终端设备中存储有每个PLMN下的配置的NSSAI和/或允许的NSSAI。配置的NSSAI是在与PLMN的交互之前配置在终端设备中，该值是配置在终端设备上的一个缺省的NSSAI，可以用于终端设备在该PLMN中初始入网时使用。The configured NSSAI and/or allowed NSSAI under each PLMN is stored in the terminal device. The configured NSSAI is configured in the terminal device before interacting with the PLMN. This value is a default NSSAI configured on the terminal device and can be used when the terminal device initially accesses the network in the PLMN.
如果核心网决定更新终端设备存储的允许的NSSAI，可以通过网络触发移动性管理(mobility management，MM)流程，例如移动性注册更新流程，以此来更新终端设备本地存储的允许的NSSAI。If the core network decides to update the allowed NSSAI stored in the terminal device, a mobility management (MM) process, such as a mobility registration update process, can be triggered through the network to update the allowed NSSAI stored locally in the terminal device.
3.漫游场景下的网络切片映射(mapping)3. Network slice mapping in roaming scenarios
归属地PLMN(home PLMN，HPLMN)与不同的VPLMN之间存在不同的漫游协议时，不同的VPLMN部署的S-NSSAI(以下简称为VPLMN S-NSSAI)与HPLMN部署的S-NSSAI(以下简称为HPLMN S-NSSAI)之间会存在不同的映射关系。终端设备在漫游场景下的某个VPLMN发起注册请求时，注册请求消息中携带请求的NSSAI(Requested NSSAI)，可选地，还可以携带与请求的NSSAI(Requested NSSAI)中每个S-NSSAI具有映射的关系的HPLMN S-NSSAI(mapping of Requested NSSAI)。When there are different roaming agreements between the home PLMN (home PLMN, HPLMN) and different VPLMNs, the S-NSSAI deployed by different VPLMNs (hereinafter referred to as VPLMN S-NSSAI) and the S-NSSAI deployed by HPLMN (hereinafter referred to as There will be different mapping relationships between HPLMN S-NSSAI). When the terminal device initiates a registration request at a certain VPLMN in a roaming scenario, the registration request message carries the requested NSSAI (Requested NSSAI). Optionally, it can also carry the characteristics of each S-NSSAI in the requested NSSAI (Requested NSSAI). HPLMN S-NSSAI (mapping of Requested NSSAI) of the mapping relationship.
图1是一种漫游场景下的切片映射的示意图。如图1所示，HPLMN、VPLMN-1和VPLMN-2是三个不同的PLMN，示例性地，VPLMN-1 S-NSSAI为部署在VPLMN-1的增强移动宽带(enhanced mobile broadband，eMBB)切片，HPLMN S-NSSAI为部署在HPLMN的超可靠低时延通信(ultra reliable low latency communication，URLLC)切片，VPLMN-2 S-NSSAI为部署在VPLMN-2的车联网(vehicle to everything，V2X)切片。Figure 1 is a schematic diagram of slice mapping in a roaming scenario. As shown in Figure 1, HPLMN, VPLMN-1 and VPLMN-2 are three different PLMNs. For example, VPLMN-1 S-NSSAI is an enhanced mobile broadband (eMBB) slice deployed in VPLMN-1 , HPLMN S-NSSAI is the ultra-reliable low latency communication (URLLC) slice deployed in HPLMN, VPLMN-2 S-NSSAI is the vehicle to everything (V2X) slice deployed in VPLMN-2 .
其中，VPLMN-1 S-NSSAI与HPLMN S-NSSAI具有映射关系1(mapping-1)，当终端设备在VPLMN-1中想要访问URLLC切片对应的业务时，由于VPLMN-1未部署URLLC切片但是根据映射关系1，终端设备可以获知在VPLMN-1中请求接入eMBB切片即可。针对上述示例，终端设备在VPLMN-1发起注册请求时，注册请求消息中包括VPLMN-1 S-NSSAI。可选地，注册请求消息中还包括VPLMN-1 S-NSSAI和HPLMN S-NSSAI之间 的映射关系1。Among them, VPLMN-1 S-NSSAI and HPLMN S-NSSAI have mapping relationship 1 (mapping-1). When the terminal device wants to access the service corresponding to the URLLC slice in VPLMN-1, because VPLMN-1 has not deployed the URLLC slice but According to mapping relationship 1, the terminal device can learn that it only needs to request access to the eMBB slice in VPLMN-1. For the above example, when the terminal device initiates a registration request at VPLMN-1, the registration request message includes VPLMN-1 S-NSSAI. Optionally, the registration request message also includes the value between VPLMN-1 S-NSSAI and HPLMN S-NSSAI Mapping relationship 1.
VPLMN-2 S-NSSAI与HPLMN S-NSSAI具有映射关系2(mapping-2)，当终端设备在VPLMN-2中想要访问URLLC切片对应的业务时，由于VPLMN-2未部署URLLC切片但是根据映射关系2，终端设备可以获知在VPLMN-2中请求接入V2X切片即可。因此终端设备在VPLMN-2发起注册请求时，携带的请求的NSSAI(Requested NSSAI)包括VPLMN-2 S-NSSAI。可选地，注册请求消息中还包括VPLMN-2 S-NSSAI和HPLMN S-NSSAI之间的映射关系2。VPLMN-2 S-NSSAI and HPLMN S-NSSAI have mapping relationship 2 (mapping-2). When the terminal device wants to access the service corresponding to the URLLC slice in VPLMN-2, because VPLMN-2 does not deploy the URLLC slice but according to the mapping In relation 2, the terminal device can learn and request access to the V2X slice in VPLMN-2. Therefore, when the terminal device initiates a registration request in VPLMN-2, the requested NSSAI (Requested NSSAI) carried includes VPLMN-2 S-NSSAI. Optionally, the registration request message also includes the mapping relationship 2 between VPLMN-2 S-NSSAI and HPLMN S-NSSAI.
在漫游场景下，示例性地，终端设备侧配置的选网策略为VPLMN-1的选网优先级高于VPLMN-2的选网优先级，VPLMN-1部署了网络切片1(如图1中的URLLC切片)，VPLMN-2部署了网络切片2(如图1中的V2X切片)，终端设备在当前位置想要接入的是网络切片2。终端设备按照选网优先级接入VPLMN-1，但是VPLMN-1没有部署终端设备想要接入的网络切片2，无法为终端设备提供网络切片2对应的业务。In the roaming scenario, for example, the network selection policy configured on the terminal device side is that the network selection priority of VPLMN-1 is higher than the network selection priority of VPLMN-2, and VPLMN-1 deploys network slice 1 (as shown in Figure 1 URLLC slice), VPLMN-2 deploys network slice 2 (V2X slice in Figure 1), and the terminal device wants to access network slice 2 at the current location. The terminal device accesses VPLMN-1 according to the network selection priority, but VPLMN-1 does not deploy the network slice 2 that the terminal device wants to access, and cannot provide services corresponding to network slice 2 for the terminal device.
需要注意的是，图1所示仅是漫游场景的不同切片之间进行映射的一种示例，本申请不限制漫游场景的切片映射的具体方法。作为一种可选的实施方式，漫游场景中还可以在相同切片之间进行映射，例如，HPLMN、VPLMN-1和VPLMN-2均部署了eMBB切片但是采用不同的切片标识来标识该eMBB切片，具体地，HPLMN S-NSSAI#1用于标识HPLMN部署的eMBB切片，VPLMN-1 S-NSSAI#2用于标识VPLMN-1部署的eMBB切片，VPLMN-2 S-NSSAI#3用于标识VPLMN-2部署的eMBB切片，那么，HPLMN S-NSSAI#1与VPLMN-1 S-NSSAI#2具有映射关系1，HPLMN S-NSSAI#1与VPLMN-2 S-NSSAI#3具有映射关系2。It should be noted that what is shown in Figure 1 is only an example of mapping between different slices in a roaming scene, and this application does not limit the specific method of slice mapping in a roaming scene. As an optional implementation, mapping can also be performed between the same slices in the roaming scenario. For example, HPLMN, VPLMN-1 and VPLMN-2 all deploy eMBB slices but use different slice identifiers to identify the eMBB slices. Specifically, HPLMN S-NSSAI#1 is used to identify the eMBB slice deployed by HPLMN, VPLMN-1 S-NSSAI#2 is used to identify the eMBB slice deployed by VPLMN-1, and VPLMN-2 S-NSSAI#3 is used to identify VPLMN- 2 deployed eMBB slice, then HPLMN S-NSSAI#1 and VPLMN-1 S-NSSAI#2 have mapping relationship 1, and HPLMN S-NSSAI#1 and VPLMN-2 S-NSSAI#3 have mapping relationship 2.
有鉴于此，本申请实施例提供一种网络选择方法和网络选择装置，在该方法中，终端设备漫游到拜访地，且终端设备所在的位置存在多个VPLMN的网络，多个VPLMN按照PLMN选网优先级进行排序，终端设备在有入网需求时，可以按照PLMN选网优先级的顺序选择满足入网条件的VPLMN。在本申请中，终端设备可以先按照预设的PLMN选网优先级的顺序判断多个VPLMN中的第一VPLMN满足入网条件，并请求接入第一VPLMN。网络可以在终端设备接入的第一VPLMN无法支持终端设备请求的网络切片的情况下，基于终端设备请求的网络切片为终端设备寻找可以支持终端设备请求的网络切片的VPLMN(称为第二VPLMN)，其中，第二VPLMN在终端设备所在的位置部署了终端设备在第一VPLMN请求的网络切片，网络调整第二VPLMN的选网优先级并将调整后的第二VPLMN的选网优先级发送至终端设备，其中，调整后的第二VPLMN的选网优先级高于第一VPLMN的选择优先级，这样终端设备可以判断是否接入优先级高于第一VPLMN的第二VPLMN，从而接入终端设备请求的网络切片，有利于满足终端设备的业务需求。可以理解为，现有技术中，终端设备按照预设的PLMN选网优先级的顺序判断接入的第一VPLMN没有部署终端设备请求的网络切片，导致终端的业务体验受到影响，通过本申请实施例的方法，网络确定出的第二VPLMN在终端设备所在的位置部署了终端设备请求的网络切片，这样终端设备选择接入第二VPLMN之后，有利于成功接入终端设备请求的网络切片，提高终端设备的用户体验。In view of this, embodiments of the present application provide a network selection method and a network selection device. In this method, a terminal device roams to a visited location, and there are multiple VPLMN networks at the location of the terminal device. The multiple VPLMNs select according to the PLMN. The network priority is sorted. When the terminal device needs to access the network, it can select the VPLMN that meets the network access conditions in the order of PLMN network selection priority. In this application, the terminal device can first determine that the first VPLMN among multiple VPLMNs meets the network access conditions according to the preset order of PLMN network selection priorities, and request access to the first VPLMN. When the first VPLMN accessed by the terminal device cannot support the network slice requested by the terminal device, the network may search for a VPLMN for the terminal device that can support the network slice requested by the terminal device (called the second VPLMN) based on the network slice requested by the terminal device. ), where the second VPLMN deploys the network slice requested by the terminal device in the first VPLMN at the location of the terminal device, and the network adjusts the network selection priority of the second VPLMN and sends the adjusted network selection priority of the second VPLMN to the terminal device, where the adjusted network selection priority of the second VPLMN is higher than that of the first VPLMN, so that the terminal device can determine whether to access the second VPLMN with a higher priority than the first VPLMN, thereby accessing The network slice requested by the terminal device is conducive to meeting the business needs of the terminal device. It can be understood that in the existing technology, the terminal device determines that the first VPLMN accessed does not deploy the network slice requested by the terminal device according to the preset PLMN network selection priority order, causing the terminal's service experience to be affected. This application implements In the example method, the second VPLMN determined by the network deploys the network slice requested by the terminal device at the location of the terminal device. In this way, after the terminal device chooses to access the second VPLMN, it is conducive to successfully accessing the network slice requested by the terminal device, improving Terminal device user experience.
本申请提供的技术方案可以应用于各种通信***，例如：5G移动通信***或新无线接入技术(new radio access technology，NR)。其中，5G移动通信***可以包括非独立组 网(non-standalone，NSA)和/或独立组网(standalone，SA)。The technical solution provided by this application can be applied to various communication systems, such as: 5G mobile communication system or new radio access technology (new radio access technology, NR). Among them, the 5G mobile communication system may include non-independent groups Networking (non-standalone, NSA) and/or independent networking (standalone, SA).
本申请提供的技术方案还可以应用于机器类通信(machine type communication，MTC)、机器间通信长期演进技术(Long Term Evolution-machine，LTE-M)、设备到设备(device to device，D2D)网络、机器到机器(machine to machine，M2M)网络、物联网(internet of things，IoT)网络或者其他网络。其中，IoT网络例如可以包括车联网。其中，车联网***中的通信方式统称为车到其他设备(vehicle to X，V2X，X可以代表任何事物)，例如，该V2X可以包括：车辆到车辆(vehicle to vehicle，V2V)通信，车辆与基础设施(vehicle to infrastructure，V2I)通信、车辆与行人之间的通信(vehicle to pedestrian，V2P)或车辆与网络(vehicle to network，V2N)通信等。The technical solution provided by this application can also be applied to machine type communication (MTC), long-term evolution technology for machine-to-machine communication (Long Term Evolution-machine, LTE-M), and device to device (device to device, D2D) networks , machine to machine (M2M) network, Internet of things (IoT) network or other networks. Among them, the IoT network may include, for example, the Internet of Vehicles. Among them, the communication methods in the Internet of Vehicles system are collectively called vehicle to other devices (vehicle to X, V2X, X can represent anything). For example, the V2X can include: vehicle to vehicle (vehicle to vehicle, V2V) communication. Infrastructure (vehicle to infrastructure, V2I) communication, communication between vehicles and pedestrians (vehicle to pedestrian, V2P) or vehicle and network (vehicle to network, V2N) communication, etc.
本申请提供的技术方案还可以应用于未来的通信***，如第六代移动通信***等。本申请对此不作限定。The technical solution provided by this application can also be applied to future communication systems, such as the sixth generation mobile communication system. This application does not limit this.
图2是适用于本申请实施例的一种网络架构的示意图。如图2所示，该网络架构为基于服务化架构的5G网络架构，该网络架构可以包括用户设备(user equipment，UE)、数据网络(data network，DN)、无线接入网(access network，RAN)以及核心网(core network，CN)。其中，核心网可以包括如下网元：网络切片选择功能(network slice selection function，NSSF)网元、网络开放功能(network exposure function，NEF)网元、网络存储功能(Network Repository Function，NRF)网元、策略控制功能(policy control function，PCF)网元、统一数据管理(unified data management，UDM)网元、应用功能(application function，AF)网元、接入和移动性管理功能(access and mobility management function，AMF)网元、会话管理功能(session management function，SMF)网元、网络切片选择的认证和授权功能(network slice-specific authentication and authorization function，NSSAAF)网元、认证服务器(authentication server function，AUSF)网元、业务通信代理(service communication proxy，SCP)网元、网络切片准入控制(Network Slice Admission Control Function，NSACF)网元、用户面功能(user plane function，UPF)网元。Figure 2 is a schematic diagram of a network architecture suitable for embodiments of the present application. As shown in Figure 2, the network architecture is a 5G network architecture based on service-oriented architecture. The network architecture can include user equipment (user equipment, UE), data network (data network, DN), wireless access network (access network, RAN) and core network (core network, CN). Among them, the core network can include the following network elements: network slice selection function (NSSF) network element, network exposure function (NEF) network element, and network storage function (Network Repository Function, NRF) network element , policy control function (PCF) network element, unified data management (UDM) network element, application function (AF) network element, access and mobility management function (access and mobility management) function, AMF) network element, session management function (SMF) network element, network slice-specific authentication and authorization function (NSSAAF) network element, authentication server function, AUSF) network element, service communication proxy (SCP) network element, Network Slice Admission Control Function (NSACF) network element, user plane function (UPF) network element.
图3是适用于本申请实施例的另一种网络架构的示意图。如图3所示，该网络架构为基于点对点接口的5G网络架构，同样地，该网络架构可以包括UE、数据网络、无线接入网以及核心网。其中，核心网可以包括如下网元：NSSF网元、AUSF网元、NSSAAF网元、UDM网元、NSACF网元、AMF网元、SMF网元、PCF网元、AF网元。Figure 3 is a schematic diagram of another network architecture suitable for embodiments of the present application. As shown in Figure 3, the network architecture is a 5G network architecture based on point-to-point interfaces. Similarly, the network architecture can include UE, data network, radio access network and core network. Among them, the core network may include the following network elements: NSSF network element, AUSF network element, NSSAAF network element, UDM network element, NSACF network element, AMF network element, SMF network element, PCF network element, and AF network element.
应理解，图2和图3示出的5G网络架构还可以包括更多的网元，此处未予以示出。It should be understood that the 5G network architecture shown in Figures 2 and 3 can also include more network elements, which are not shown here.
图2或图3所示的RAN可用于实现无线相关的功能，DN可用于为UE提供数据传输服务。数据网络可以是公用数据网(public data network，PDN)网络，如因特网(Internet)等，也可以是本地接入数据网络(local access data network，LADN)，如移动边缘计算(mobile edge computing，MEC)节点的网络；还可以是第三方的业务网络、IP多媒体服务业务(IP multi-media service)网络等。The RAN shown in Figure 2 or Figure 3 can be used to implement wireless-related functions, and the DN can be used to provide data transmission services for the UE. The data network can be a public data network (PDN) network, such as the Internet, or a local access data network (LADN), such as mobile edge computing (MEC) ) node network; it can also be a third-party business network, IP multi-media service network, etc.
下面对核心网包括的几个关键逻辑网元进行介绍：The following is an introduction to several key logical network elements included in the core network:
1、AMF网元：负责用户的移动性管理，包括移动状态管理，分配用户临时身份标识，认证和授权用户。1. AMF network element: Responsible for user mobility management, including mobility status management, assigning user temporary identities, authenticating and authorizing users.
2、UDM网元：负责管理签约数据，当签约数据修改的时候，负责通知相应的网元。2. UDM network element: Responsible for managing contract data and notifying the corresponding network element when the contract data is modified.
3、NSSF网元：负责网络切片的选择。 3. NSSF network element: Responsible for the selection of network slicing.
4、SMF网元：负责用户面(user plane，UP)网元选择，UP网元重选，互联网协议(internet protocol，IP)地址分配，负责会话的建立、修改和释放，服务质量(quality of service，QoS)控制。4. SMF network element: Responsible for user plane (UP) network element selection, UP network element reselection, Internet protocol (internet protocol, IP) address allocation, session establishment, modification and release, quality of service (quality of service, QoS) control.
5、AUSF网元：主要负责网络安全，用于产生密钥，实现对于UE的双向鉴权，实现3GPP和非3GPP的接入认证。5. AUSF network element: Mainly responsible for network security, used to generate keys, implement two-way authentication for UE, and implement 3GPP and non-3GPP access authentication.
6、NEF网元：开放各个网元的能力，转换内外部的信息，用于边缘计算场景。6. NEF network element: Open the capabilities of each network element, convert internal and external information, and be used in edge computing scenarios.
7、PCF网元：主要用于管理策略规则，管理用户订阅信息等。7. PCF network element: mainly used to manage policy rules, manage user subscription information, etc.
8、UDR：存储和检索签约数据、策略数据和公共架构数据等，供UDM、PCF和NEF获取相关数据。UDR能够针对不同类型的数据如签约数据、策略数据有不同的数据接入鉴权机制，以保证数据接入的安全性。UDR对于非法的服务化操作或者数据接入请求要能够返回携带合适原因值的失败响应。8. UDR: Stores and retrieves contract data, policy data, public architecture data, etc. for UDM, PCF and NEF to obtain relevant data. UDR can have different data access authentication mechanisms for different types of data, such as contract data and policy data, to ensure the security of data access. UDR must be able to return failure responses carrying appropriate cause values for illegal service operations or data access requests.
9、NRF网元：负责网元的注册和发现功能，并维护网元的信息，例如，该网元的实例标识、类型、PLMN、切片相关的标识、IP地址或者全限定域名(fully qualified domain name，FQDN)、该网元的能力、支持的服务等。9. NRF network element: Responsible for the registration and discovery functions of network elements, and maintaining network element information, such as the instance identification, type, PLMN, slice-related identification, IP address or fully qualified domain name of the network element. name, FQDN), the network element’s capabilities, supported services, etc.
10、AF网元：主要用于向网络发送应用影响的数据路由信息，通过网络开放功能网元与策略框架交互进行策略控制等。10. AF network element: Mainly used to send application-influenced data routing information to the network, and interact with the policy framework through network open function network elements to perform policy control, etc.
11、UPF网元：将PDU会话与数据网络互连、分组路由和转发以及数据包检测。11. UPF network element: interconnects PDU sessions with data networks, packet routing and forwarding, and data packet inspection.
图2和图3的区别在于：图2所示的网络架构中的各个网元之间的接口为服务化的接口，图3所示的网络架构中的各个网元之间的接口为点对点的接口。The difference between Figure 2 and Figure 3 is that the interfaces between each network element in the network architecture shown in Figure 2 are service-based interfaces, while the interfaces between each network element in the network architecture shown in Figure 3 are point-to-point. interface.
应理解，本申请实施例适用的网络架构并不局限于图2或图3，任何能够实现上述各个网元的功能的网络架构都适用于本申请实施例。It should be understood that the network architecture applicable to the embodiments of the present application is not limited to Figure 2 or Figure 3. Any network architecture that can realize the functions of each of the above network elements is applicable to the embodiments of the present application.
还应理解，上述核心网包括的网元可以是各自独立的设备，也可以集成于同一设备中实现不同的功能，本申请对于上述网元的具体形态不作限定。It should also be understood that the network elements included in the above-mentioned core network can be independent devices, or can be integrated into the same device to implement different functions. This application does not limit the specific form of the above-mentioned network elements.
还应理解，上述命名仅为便于区分不同的功能而定义，不应对本申请构成任何限定。本申请并不排除在5G网络以及未来其它的网络中采用其他命名的可能。例如，在6G网络中，上述各个网元中的部分或全部可以沿用5G中的术语，也可能采用其他名称等。图2或图3中的各个网元之间的接口名称只是一个示例，具体实现中接口的名称可能为其他的名称，本申请对此不作具体限定。此外，上述各个网元之间的所传输的消息(或信令)的名称也仅仅是一个示例，对消息本身的功能不构成任何限定。It should also be understood that the above nomenclature is only defined to facilitate the differentiation of different functions and should not constitute any limitation on this application. This application does not rule out the possibility of using other naming in 5G networks and other future networks. For example, in a 6G network, some or all of the above network elements may use the terminology used in 5G, or may adopt other names. The interface names between the various network elements in Figure 2 or Figure 3 are just examples. In specific implementations, the names of the interfaces may be other names, which is not specifically limited in this application. In addition, the names of the messages (or signaling) transmitted between the various network elements are only examples and do not constitute any limitation on the function of the messages themselves.
本申请实施例的终端设备可以是具有无线连接功能的手持式设备、车载设备等，该终端设备也可以称为终端(terminal)、用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等。The terminal device in the embodiment of the present application can be a handheld device, a vehicle-mounted device, etc. with a wireless connection function. The terminal device can also be called a terminal (terminal), user equipment (UE), mobile station (MS) ), mobile terminal (mobile terminal, MT), etc.
目前，一些终端设备的举例为：手机(mobile phone)、平板电脑、智能电视、笔记本电脑、平板电脑(Pad)、掌上电脑、移动互联网设备(mobile internet device，MID)、虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、蜂窝电话、无绳电话、会话启动协议(session initiation protocol， SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等，本申请的实施例对终端设备所采用的具体技术和具体设备形态不作限定。At present, some examples of terminal devices are: mobile phones, tablets, smart TVs, laptops, tablets (Pad), PDAs, mobile internet devices (MID), virtual reality, VR) equipment, augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, smart Wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, conversations session initiation protocol, SIP) telephone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, vehicle-mounted device , wearable devices, terminal equipment in the 5G network or terminal equipment in the future evolved public land mobile communication network (public land mobile network, PLMN), etc. The embodiments of this application apply specific technologies and specific equipment to the terminal equipment. The form is not limited.
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices. It is a general term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes, etc. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly defined wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones. Use, such as various types of smart bracelets, smart jewelry, etc. for physical sign monitoring.
应理解，本申请实施例中，终端设备可以是用于实现终端设备功能的装置，也可以是能够支持终端设备实现该功能的装置，例如芯片***，该装置可以被安装在终端中。本申请实施例中，芯片***可以由芯片构成，也可以包括芯片和其他分立器件。It should be understood that in the embodiments of the present application, the terminal device may be a device for realizing the function of the terminal device, or a device that can support the terminal device to realize the function, such as a chip system, and the device may be installed in the terminal. In the embodiments of this application, the chip system may be composed of chips, or may include chips and other discrete devices.
本申请实施例中的终端设备也可以称为：用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置等。The terminal equipment in the embodiment of this application may also be called: user equipment (UE), mobile station (MS), mobile terminal (mobile terminal, MT), access terminal, user unit, user station, Mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device, etc.
图4是本申请实施例适用的一种终端设备的结构示意图。如图4所示，该终端设备400可以包括：处理器110，外部存储器接口120，内部存储器121，通用串行总线(universal serial bus，USB)接口130，充电管理模块140，电源管理模块141，电池142，天线1，天线2，移动通信模块150，无线通信模块160，音频模块170，扬声器170A，受话器170B，麦克风170C，耳机接口170D，传感器180，按键190，马达191，指示器192，摄像头193，显示屏194，以及用户标识模块(subscriber identification module，SIM)卡接口195等。可以理解的是，本实施例示意的结构并不构成对终端设备400的具体限定。在本申请另一些实施例中，终端设备400可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。图示的部件可以以硬件，软件，或软件和硬件的组合实现。Figure 4 is a schematic structural diagram of a terminal device applicable to the embodiment of the present application. As shown in Figure 4, the terminal device 400 may include: a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, and a power management module 141. Battery 142, antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, headphone interface 170D, sensor 180, button 190, motor 191, indicator 192, camera 193, display screen 194, and subscriber identification module (subscriber identification module, SIM) card interface 195, etc. It can be understood that the structure illustrated in this embodiment does not constitute a specific limitation on the terminal device 400. In other embodiments of the present application, the terminal device 400 may include more or less components than shown in the figures, or combine some components, or split some components, or arrange different components. The components illustrated may be implemented in hardware, software, or a combination of software and hardware.
处理器110可以包括一个或多个处理单元，例如：处理器110可以包括应用处理器(application processor，AP)，调制解调处理器，图形处理器(graphics processing unit，GPU)，图像信号处理器(image signal processor，ISP)，控制器，视频编解码器，数字信号处理器(digital signal processor，DSP)，基带处理器，显示处理单元(display process unit，DPU)，和/或神经网络处理器(neural-network processing unit，NPU)等。其中，不同的处理单元可以是独立的器件，也可以集成在一个或多个处理器中。在一些实施例中，终端设备400也可以包括一个或多个处理器110。其中，处理器可以是终端设备400的神经中枢和指挥中心。处理器可以根据指令操作码和时序信号，产生操作控制信号，完成取指令和执行指令的控制。处理器110中还可以设置存储器，用于存储指令和数据。在一些实施 例中，处理器110中的存储器为高速缓冲存储器。该存储器可以保存处理器110用过或循环使用的指令或数据。如果处理器110需要再次使用该指令或数据，可从所述存储器中直接调用。这就避免了重复存取，减少了处理器110的等待时间，因而提高了终端设备400的效率。The processor 110 may include one or more processing units. For example, the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processing unit (GPU), and an image signal processor. (image signal processor, ISP), controller, video codec, digital signal processor (DSP), baseband processor, display process unit (DPU), and/or neural network processor (neural-network processing unit, NPU), etc. Among them, different processing units can be independent devices or integrated in one or more processors. In some embodiments, the terminal device 400 may also include one or more processors 110. The processor may be the nerve center and command center of the terminal device 400 . The processor can generate operation control signals based on the instruction opcode and timing signals to complete the control of fetching and executing instructions. The processor 110 may also be provided with a memory for storing instructions and data. In some implementations In this example, the memory in processor 110 is a cache memory. The memory may hold instructions or data used or recycled by processor 110 . If the processor 110 needs to use the instructions or data again, it can be called directly from the memory. This avoids repeated access and reduces the waiting time of the processor 110, thereby improving the efficiency of the terminal device 400.
在一些实施例中，处理器110可以包括一个或多个接口。接口可以包括集成电路(inter-integrated circuit，I2C)接口，集成电路内置音频(inter-integrated circuit sound，I2 S)接口，脉冲编码调制(pulse code modulation，PCM)接口，通用异步收发传输器(universal asynchronous receiver/transmitter，UART)接口，移动产业处理器接口(mobile industry processor interface，MIPI)，通用输入输出(general-purpose input/output，GPIO)接口，用户标识模块(subscriber identity module，SIM)接口，和/或USB接口等。其中，USB接口130是符合USB标准规范的接口，具体可以是Mini USB接口，Micro USB接口，USB Type C接口等。USB接口130可以用于连接充电器为终端设备400充电，也可以用于终端设备400与***设备之间传输数据。也可以用于连接耳机，通过耳机播放音频。In some embodiments, processor 110 may include one or more interfaces. Interfaces may include integrated circuit (inter-integrated circuit, I2C) interface, integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, pulse code modulation (pulse code modulation, PCM) interface, universal asynchronous receiver and transmitter (universal asynchronous receiver/transmitter (UART) interface, mobile industry processor interface (MIPI), general-purpose input/output (GPIO) interface, subscriber identity module (SIM) interface, and/or USB interface, etc. Among them, the USB interface 130 is an interface that complies with USB standard specifications, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc. The USB interface 130 can be used to connect a charger to charge the terminal device 400, and can also be used to transmit data between the terminal device 400 and peripheral devices. It can also be used to connect headphones to play audio through them.
可以理解的是，本申请实施例示意的各模块间的接口连接关系为示意性说明，并不构成对终端设备400的结构限定。在本申请另一些实施例中，终端设备400也可以采用上述实施例中不同的接口连接方式，或多种接口连接方式的组合。It can be understood that the interface connection relationships between the modules illustrated in the embodiment of the present application are schematic illustrations and do not constitute a structural limitation on the terminal device 400 . In other embodiments of the present application, the terminal device 400 may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.
终端设备400的无线通信功能可以通过天线1，天线2，移动通信模块150，无线通信模块160，调制解调处理器以及基带处理器等实现。天线1和天线2用于发射和接收电磁波信号。终端设备400中的每个天线可用于覆盖单个或多个通信频带。不同的天线还可以复用，以提高天线的利用率。例如：可以将天线1复用为无线局域网的分集天线。在另外一些实施例中，天线可以和调谐开关结合使用。The wireless communication function of the terminal device 400 can be implemented through the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modem processor and the baseband processor. Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in terminal device 400 may be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization. For example: Antenna 1 can be reused as a diversity antenna for a wireless LAN. In other embodiments, antennas may be used in conjunction with tuning switches.
移动通信模块150可以提供应用在终端设备400上的包括2G/3G/4G/5G等无线通信的解决方案。移动通信模块150可以包括至少一个滤波器，开关，功率放大器，低噪声放大器等。移动通信模块150可以由天线1接收电磁波，并对接收的电磁波进行滤波，放大等处理，传送至调制解调处理器进行解调。移动通信模块150还可以对经调制解调处理器调制后的信号放大，经天线1转为电磁波辐射出去。在一些实施例中，移动通信模块150的至少部分功能模块可以被设置于处理器110中。在一些实施例中，移动通信模块150的至少部分功能模块可以与处理器110的至少部分模块被设置在同一个器件中。The mobile communication module 150 can provide wireless communication solutions including 2G/3G/4G/5G applied to the terminal device 400. The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier, etc. The mobile communication module 150 can receive electromagnetic waves through the antenna 1, perform filtering, amplification and other processing on the received electromagnetic waves, and transmit them to the modem processor for demodulation. The mobile communication module 150 can also amplify the signal modulated by the modem processor and convert it into electromagnetic waves through the antenna 1 for radiation. In some embodiments, at least part of the functional modules of the mobile communication module 150 may be disposed in the processor 110 . In some embodiments, at least part of the functional modules of the mobile communication module 150 and at least part of the modules of the processor 110 may be provided in the same device.
调制解调处理器可以包括调制器和解调器。其中，调制器用于将待发送的低频基带信号调制成中高频信号。解调器用于将接收的电磁波信号解调为低频基带信号。随后解调器将解调得到的低频基带信号传送至基带处理器处理。低频基带信号经基带处理器处理后，被传递给应用处理器。应用处理器通过音频设备(不限于扬声器170A，受话器170B等)输出声音信号，或通过显示屏194显示图像或视频。在一些实施例中，调制解调处理器可以是独立的器件。在另一些实施例中，调制解调处理器可以独立于处理器110，与移动通信模块150或其他功能模块设置在同一个器件中。A modem processor may include a modulator and a demodulator. Among them, the modulator is used to modulate the low-frequency baseband signal to be sent into a medium-high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then transmits the demodulated low-frequency baseband signal to the baseband processor for processing. After the low-frequency baseband signal is processed by the baseband processor, it is passed to the application processor. The application processor outputs sound signals through audio devices (not limited to speaker 170A, receiver 170B, etc.), or displays images or videos through display screen 194. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be independent of the processor 110 and may be provided in the same device as the mobile communication module 150 or other functional modules.
无线通信模块160可以提供应用在终端设备400上的包括无线局域网(wireless local area networks，WLAN)，蓝牙，全球导航卫星***(global navigation satellite system，GNSS)，调频(frequency modulation，FM)，NFC，红外技术(infrared，IR)等无线通信的解决方案。无线通信模块160可以是集成至少一个通信处理模块的一个或多个器件。无线通信模 块160经由天线2接收电磁波，将电磁波信号调频以及滤波处理，将处理后的信号发送到处理器110。无线通信模块160还可以从处理器110接收到发送的信号，对其进行调频，放大，经天线2转为电磁波辐射出去。The wireless communication module 160 can provide applications on the terminal device 400 including wireless local area networks (WLAN), Bluetooth, global navigation satellite system (GNSS), frequency modulation (FM), NFC, Infrared technology (infrared, IR) and other wireless communication solutions. The wireless communication module 160 may be one or more devices integrating at least one communication processing module. wireless communication module Block 160 receives the electromagnetic wave via the antenna 2 , frequency modulates and filters the electromagnetic wave signal, and sends the processed signal to the processor 110 . The wireless communication module 160 can also receive the signal sent from the processor 110, frequency modulate it, amplify it, and convert it into electromagnetic waves through the antenna 2 for radiation.
在一些实施例中，终端设备400的天线1和移动通信模块150耦合，天线2和无线通信模块160耦合，使得终端设备400可以通过无线通信技术与网络以及其他设备通信。所述无线通信技术可以包括GSM，GPRS，CDMA，WCDMA，TD-SCDMA，LTE，GNSS，WLAN，NFC，FM，和/或IR技术等。上述GNSS可以包括全球卫星定位***(global positioning system，GPS)，全球导航卫星***(global navigation satellite system，GLONASS)，北斗卫星导航***(bei dou navigation satellite system，BDS)，准天顶卫星***(quasi-zenith satellite system，QZSS)和/或星基增强***(satellite based augmentation systems，SBAS)。In some embodiments, the antenna 1 of the terminal device 400 is coupled to the mobile communication module 150, and the antenna 2 is coupled to the wireless communication module 160, so that the terminal device 400 can communicate with the network and other devices through wireless communication technology. The wireless communication technology may include GSM, GPRS, CDMA, WCDMA, TD-SCDMA, LTE, GNSS, WLAN, NFC, FM, and/or IR technology, etc. The above-mentioned GNSS can include global positioning system (GPS), global navigation satellite system (GLONASS), Beidou navigation satellite system (BDS), quasi-zenith satellite system (quasi) -zenith satellite system (QZSS) and/or satellite based augmentation systems (SBAS).
传感器180可以包括压力传感器180A，陀螺仪传感器180B，气压传感器180C，磁传感器180D，加速度传感器180E，距离传感器180F，接近光传感器180G，指纹传感器180H，温度传感器180J，触摸传感器180K，环境光传感器180L，骨传导传感器180M等。The sensors 180 may include a pressure sensor 180A, a gyro sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, and an ambient light sensor 180L. , bone conduction sensor 180M, etc.
下面将结合附图详细说明本申请实施例提供的网络选择方法。The network selection method provided by the embodiment of the present application will be described in detail below with reference to the accompanying drawings.
图5是本申请实施例提供的一种网络选择方法500的示意性流程图。方法500可以应用于如图2或图3所示的网络架构，但本申请实施例对此不作限定。方法500包括如下步骤：Figure 5 is a schematic flow chart of a network selection method 500 provided by an embodiment of the present application. The method 500 can be applied to the network architecture shown in Figure 2 or Figure 3, but this is not limited in the embodiment of the present application. Method 500 includes the following steps:
S501，终端设备向第一VPLMN中的AMF网元(以下称为第一VPLMN AMF)发送第一消息。相应地，第一VPLMN AMF接收第一消息。S501: The terminal device sends the first message to the AMF network element in the first VPLMN (hereinafter referred to as the first VPLMN AMF). Accordingly, the first VPLMN AMF receives the first message.
在本申请实施例中，第一消息用于请求接入第一VPLMN，第一消息包括终端设备请求的NSSAI(Requested NSSAI)，该请求的NSSAI(Requested NSSAI)包括一个或多个S-NSSAI，S-NSSAI用于标识第一VPLMN的切片，也即，第一消息中包含的一个或多个S-NSSAI可以标识终端设备请求在第一VPLMN接入的一个或多个切片。In the embodiment of this application, the first message is used to request access to the first VPLMN. The first message includes the NSSAI (Requested NSSAI) requested by the terminal device. The requested NSSAI (Requested NSSAI) includes one or more S-NSSAI. The S-NSSAI is used to identify the slice of the first VPLMN. That is, one or more S-NSSAIs contained in the first message may identify one or more slices that the terminal device requests to access in the first VPLMN.
可选地，第一消息还包括请求的NSSAI的映射关系(mapping of Requested NSSAI)，请求的NSSAI的映射关系(mapping of Requested NSSAI)指的是请求的NSSAI中的每个S-NSSAI和HPLMN S-NSSAI之间的映射关系。其中，HPLMN是终端设备的归属地PLMN，HPLMN S-NSSAI用于标识HPLMN部署的切片，可以理解为，请求的NSSAI的映射关系(mapping of Requested NSSAI)用于表示终端设备请求在第一VPLMN中接入的一个或多个切片与HPLMN的一个或多个切片具有映射关系。Optionally, the first message also includes the mapping of the requested NSSAI (mapping of Requested NSSAI). The mapping of the requested NSSAI refers to each S-NSSAI and HPLMN S in the requested NSSAI. -Mapping relationship between NSSAI. Among them, HPLMN is the home PLMN of the terminal device, and HPLMN S-NSSAI is used to identify the slice of HPLMN deployment. It can be understood that the mapping of the requested NSSAI (mapping of Requested NSSAI) is used to indicate that the terminal device requests in the first VPLMN One or more slices of the access have a mapping relationship with one or more slices of the HPLMN.
举例说明，终端设备根据业务需求期望访问HPLMN S-NSSAI-A、HPLMN S-NSSAI-B和HPLMN S-NSSAI-C，但是由于终端设备处于漫游状态且位于VPLMN，该终端设备根据配置信息确定VPLMN S-NSSAI-1和HPLMN S-NSSAI-A具有映射关系，VPLMN S-NSSAI-2和HPLMN S-NSSAI-B具有映射关系，VPLMN S-NSSAI-3和HPLMN S-NSSAI-C具有映射关系。因此，终端设备可以向第一VPLMN AMF发送请求的NSSAI(Requested NSSAI)以及请求的NSSAI的映射关系(mapping of Requested NSSAI)，其中，请求的NSSAI(Requested NSSAI)包含VPLMN S-NSSAI-1、VPLMN S-NSSAI-2和VPLMN S-NSSAI-3，请求的NSSAI的映射关系(mapping of Requested NSSAI)包括HPLMN S-NSSAI-A、HPLMN S-NSSAI-B和HPLMN S-NSSAI-C。可以理解为，VPLMN并没有部署HPLMN  S-NSSAI-A、HPLMN S-NSSAI-B和HPLMN S-NSSAI-C分别所标识的切片，而是部署了与HPLMN S-NSSAI-A、HPLMN S-NSSAI-B和HPLMN S-NSSAI-C分别具有映射关系的切片，因此终端设备在第一消息中携带映射关系告诉第一VPLMN AMF该终端设备期望访问的切片到底是哪一个。For example, the terminal device expects to access HPLMN S-NSSAI-A, HPLMN S-NSSAI-B, and HPLMN S-NSSAI-C based on business requirements. However, because the terminal device is in roaming state and is located in the VPLMN, the terminal device determines the VPLMN based on the configuration information. S-NSSAI-1 and HPLMN S-NSSAI-A have a mapping relationship, VPLMN S-NSSAI-2 and HPLMN S-NSSAI-B have a mapping relationship, and VPLMN S-NSSAI-3 and HPLMN S-NSSAI-C have a mapping relationship. Therefore, the terminal device can send the requested NSSAI (Requested NSSAI) and the mapping of the requested NSSAI (mapping of Requested NSSAI) to the first VPLMN AMF, where the requested NSSAI (Requested NSSAI) includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3, the mapping of requested NSSAI includes HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C. It can be understood that VPLMN does not deploy HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C are respectively identified slices, but are deployed with HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C. Each slice has a mapping relationship, so the terminal device carries the mapping relationship in the first message to tell the first VPLMN AMF which slice the terminal device expects to access.
其中，第一VPLMN为终端设备在漫游场景下请求接入的VPLMN，也可以称为服务Serving VPLMN。终端设备可以按照预配置的PLMN选网优先级请求接入第一VPLMN。请求的NSSAI(Requested NSSAI)包含的一个或多个S-NSSAI对应的是第一VPLMN S-NSSAI。Among them, the first VPLMN is the VPLMN that the terminal device requests access to in a roaming scenario, and may also be called a serving VPLMN. The terminal device may request to access the first VPLMN according to the preconfigured PLMN network selection priority. One or more S-NSSAIs contained in the requested NSSAI (Requested NSSAI) correspond to the first VPLMN S-NSSAI.
示例性地，第一消息为终端设备在第一VPLMN发起的注册请求消息。For example, the first message is a registration request message initiated by the terminal device in the first VPLMN.
可选地，第一消息还可以包括第二指示信息，该第二指示信息用于指示若第一VPLMN不支持终端设备请求接入的切片，即第一VPLMN不支持请求的NSSAI(Requested NSSAI)中的至少一个S-NSSAI，为终端设备寻找支持终端设备请求接入的全部切片的其他VPLMN的信息，即，终端设备期望网络寻找到的VPLMN支持的切片包括与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的HPLMN S-NSSAI具有映射关系的切片。第一VPLMN AMF在接收到第二指示信息之后，第一VPLMN确定为终端设备寻找其他VPLMN，并且第一VPLMN AMF向终端设备返回寻找到的其他VPLMN的信息。这样，第二指示信息可以触发第一VPLMN AMF通过HPLMN NSSF尽可能地为终端设备寻找支持的切片包括与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的HPLMN S-NSSAI具有映射关系的切片的其他VPLMN，以期尽可能地满足终端设备的业务需求。Optionally, the first message may also include second indication information. The second indication information is used to indicate that if the first VPLMN does not support the slice requested by the terminal device to access, that is, the first VPLMN does not support the requested NSSAI (Requested NSSAI). At least one S-NSSAI in the network searches for information about other VPLMNs that support all slices that the terminal device requests to access. That is, the terminal device expects that the slices supported by the VPLMN found by the network include mapping relationships with the requested NSSAI. of Requested NSSAI) contains HPLMN S-NSSAI slices with mapping relationships. After the first VPLMN AMF receives the second indication information, the first VPLMN determines to search for other VPLMNs for the terminal device, and the first VPLMN AMF returns the information of the found other VPLMNs to the terminal device. In this way, the second indication information can trigger the first VPLMN AMF to use the HPLMN NSSF to find supported slices for the terminal device as much as possible, including slices that have a mapping relationship with the HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI). other VPLMNs in order to meet the business needs of terminal devices as much as possible.
S502，在第一VPLMN不支持终端设备请求接入的切片中的至少一个的情况下，第一VPLMN AMF向HPLMN UDM发送终端设备的位置信息和HPLMN的一个或多个切片的信息。相应地，UDM接收终端设备的位置信息和HPLMN的一个或多个切片的信息。S502. In the case where the first VPLMN does not support at least one of the slices requested by the terminal device to access, the first VPLMN AMF sends the location information of the terminal device and the information of one or more slices of the HPLMN to the HPLMN UDM. Correspondingly, the UDM receives the location information of the terminal device and the information of one or more slices of the HPLMN.
其中，第一VPLMN AMF确定HPLMN的一个或多个切片的信息的方法可以是：在一种可能的实现方式中，在S501中，终端设备在第一消息中携带请求的NSSAI(Requested NSSAI)以及请求的NSSAI的映射关系(mapping of Requested NSSAI)。其中，请求的NSSAI的映射关系(mapping of Requested NSSAI)指的是与请求的NSSAI(Requested NSSAI)中每一个S-NSSAI具有映射关系的HPLMN S-NSSAI，即可以理解为，请求的NSSAI的映射关系(mapping of Requested NSSAI)包含了与请求的NSSAI(Requested NSSAI)中的每个S-NSSAI具有映射关系的HPLMN S-NSSAI，第一VPLMN AMF将与请求的NSSAI(Requested NSSAI)中的每个S-NSSAI具有映射关系的HPLMN S-NSSAI发送至HPLMN UDM。当第一VPLMN AMF判断不支持终端设备请求接入的切片中的至少一个，即第一VPLMN不支持请求的NSSAI(Requested NSSAI)中的至少一个，那么第一VPLMN AMF可以根据终端设备在第一消息中携带的请求的NSSAI的映射关系(mapping of Requested NSSAI)确定HPLMN S-NSSAIs，即确定HPLMN的一个或多个切片的信息。The method for the first VPLMN AMF to determine the information of one or more slices of the HPLMN may be: In a possible implementation, in S501, the terminal device carries the requested NSSAI (Requested NSSAI) in the first message and Mapping of Requested NSSAI. Among them, the mapping of the requested NSSAI (mapping of Requested NSSAI) refers to the HPLMN S-NSSAI that has a mapping relationship with each S-NSSAI in the requested NSSAI (Requested NSSAI), which can be understood as the mapping of the requested NSSAI. The relationship (mapping of Requested NSSAI) contains the HPLMN S-NSSAI that has a mapping relationship with each S-NSSAI in the requested NSSAI (Requested NSSAI). The first VPLMN AMF will be associated with each S-NSSAI in the requested NSSAI (Requested NSSAI). S-NSSAI HPLMN S-NSSAI with mapping relationship is sent to HPLMN UDM. When the first VPLMN AMF determines that it does not support at least one of the slices requested by the terminal device to access, that is, the first VPLMN does not support at least one of the requested NSSAI (Requested NSSAI), then the first VPLMN AMF can determine whether the terminal device is in the first slice. The mapping of the requested NSSAI carried in the message determines the HPLMN S-NSSAIs, that is, the information that determines one or more slices of the HPLMN.
在一种可能的实现方式中，请求的NSSAI的映射关系(mapping of Requested NSSAI)可以预先配置在终端设备上。In a possible implementation, the mapping of requested NSSAI can be pre-configured on the terminal device.
在另一种可能的实现方式中，在执行S501之前，终端设备可以从第一VPLMN AMF获取请求的NSSAI的映射关系(mapping of Requested NSSAI)。 In another possible implementation, before performing S501, the terminal device may obtain the mapping relationship (mapping of Requested NSSAI) from the first VPLMN AMF.
举例说明，请求的NSSAI(Requested NSSAI)以及请求的NSSAI的映射关系(mapping of Requested NSSAI)如下表1所示。其中，请求的NSSAI包含VPLMN S-NSSAI-1、VPLMN S-NSSAI-2和VPLMN S-NSSAI-3，其中，VPLMN S-NSSAI-1和HPLMN S-NSSAI-A具有映射关系，VPLMN S-NSSAI-2和HPLMN S-NSSAI-B具有映射关系，VPLMN S-NSSAI-3和HPLMN S-NSSAI-C具有映射关系。当第一VPLMN不支持请求的NSSAI(Requested NSSAI)中的至少一个S-NSSAI时，第一VPLMN AMF可以将HPLMN S-NSSAI-A、HPLMN S-NSSAI-B以及HPLMN S-NSSAI-C发送至HPLMN UDM，即S502中的HPLMN的一个或多个切片的信息指的是HPLMN S-NSSAI-A、HPLMN S-NSSAI-B以及HPLMN S-NSSAI-C。For example, the mapping relationship between the requested NSSAI (Requested NSSAI) and the requested NSSAI (mapping of Requested NSSAI) is as shown in Table 1 below. Among them, the requested NSSAI includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3. Among them, VPLMN S-NSSAI-1 and HPLMN S-NSSAI-A have a mapping relationship, VPLMN S-NSSAI -2 has a mapping relationship with HPLMN S-NSSAI-B, and VPLMN S-NSSAI-3 has a mapping relationship with HPLMN S-NSSAI-C. When the first VPLMN does not support at least one S-NSSAI in the requested NSSAI (Requested NSSAI), the first VPLMN AMF may send HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C to HPLMN UDM, that is, the information of one or more slices of HPLMN in S502 refers to HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C.
表1
Table 1
作为另一种可能的实现方式，在S501中，终端设备在第一消息中携带请求的NSSAI(Requested NSSAI)，即S501中的第一消息未携带请求的NSSAI的映射关系(mapping of Requested NSSAI)。当第一VPLMN AMF判断不支持终端设备请求接入的切片中的至少一个，即第一VPLMN不支持请求的NSSAI(Requested NSSAI)中的至少一个，那么第一VPLMN AMF可以根据终端设备在第一消息中携带的请求的NSSAI以及第一VPLMN和HPLMN之间的漫游协议确定请求的NSSAI的映射关系(mapping of Requested NSSAI)，即确定与请求的NSSAI(Requested NSSAI)中每一个S-NSSAI具有映射关系的HPLMN S-NSSAI，即HPLMN的一个或多个切片的信息。As another possible implementation, in S501, the terminal device carries the requested NSSAI (Requested NSSAI) in the first message, that is, the first message in S501 does not carry the mapping of the requested NSSAI (mapping of Requested NSSAI). . When the first VPLMN AMF determines that it does not support at least one of the slices requested by the terminal device to access, that is, the first VPLMN does not support at least one of the requested NSSAI (Requested NSSAI), then the first VPLMN AMF can determine whether the terminal device is in the first slice. The requested NSSAI carried in the message and the roaming agreement between the first VPLMN and HPLMN determine the mapping relationship (mapping of Requested NSSAI) of the requested NSSAI, that is, it is determined that each S-NSSAI in the requested NSSAI (Requested NSSAI) has a mapping. The HPLMN S-NSSAI of the relationship is the information of one or more slices of HPLMN.
应理解，第一VPLMN和HPLMN之间的漫游协议包含了第一VPLMN S-NSSAI和HPLMN S-NSSAI之间的映射关系。It should be understood that the roaming agreement between the first VPLMN and the HPLMN includes the mapping relationship between the first VPLMN S-NSSAI and the HPLMN S-NSSAI.
举例说明，第一VPLMN和HPLMN之间的漫游协议预配置在第一VPLMN中，第一VPLMN和HPLMN之间的漫游协议包含了第一VPLMN S-NSSAI和HPLMN S-NSSAI之间的映射关系(如表2所示)。终端设备在第一消息中携带请求的NSSAI(Requested NSSAI)，其中，请求的NSSAI(Requested NSSAI)包含VPLMN S-NSSAI-1、VPLMN S-NSSAI-2和VPLMN S-NSSAI-3。当第一VPLMN不支持请求的NSSAI(Requested NSSAI)中的至少一个S-NSSAI时，第一VPLMN AMF根据第一VPLMN S-NSSAI和HPLMN S-NSSAI之间的映射关系(如表2所示)确定VPLMN S-NSSAI-1和HPLMN S-NSSAI-A具有映射关系，VPLMN S-NSSAI-2和HPLMN S-NSSAI-B具有映射关系，VPLMN S-NSSAI-3和HPLMN S-NSSAI-C具有映射关系。这样，第一VPLMN AMF可以将HPLMN S-NSSAI-A、HPLMN S-NSSAI-B以及HPLMN S-NSSAI-C发送至HPLMN UDM，即S502中的HPLMN的一个或多个切片的信息指的是HPLMN S-NSSAI-A、HPLMN S-NSSAI-B以及HPLMN S-NSSAI-C。For example, the roaming agreement between the first VPLMN and HPLMN is pre-configured in the first VPLMN, and the roaming agreement between the first VPLMN and HPLMN includes the mapping relationship between the first VPLMN S-NSSAI and HPLMN S-NSSAI ( As shown in table 2). The terminal device carries the requested NSSAI (Requested NSSAI) in the first message, where the requested NSSAI (Requested NSSAI) includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3. When the first VPLMN does not support at least one S-NSSAI in the requested NSSAI (Requested NSSAI), the first VPLMN AMF is based on the mapping relationship between the first VPLMN S-NSSAI and HPLMN S-NSSAI (as shown in Table 2) Determine that VPLMN S-NSSAI-1 and HPLMN S-NSSAI-A have a mapping relationship, VPLMN S-NSSAI-2 and HPLMN S-NSSAI-B have a mapping relationship, VPLMN S-NSSAI-3 and HPLMN S-NSSAI-C have a mapping relationship relation. In this way, the first VPLMN AMF can send HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C to HPLMN UDM, that is, the information of one or more slices of HPLMN in S502 refers to HPLMN S-NSSAI-A, HPLMN S-NSSAI-B, and HPLMN S-NSSAI-C.
表2
Table 2
综上所述，上述描述中的HPLMN的一个或多个切片的信息的含义也可以替换成与请求的NSSAI(Requested NSSAI)中的每个S-NSSAI具有映射关系的HPLMN S-NSSAI或者请求的NSSAI的映射关系(mapping of Requested NSSAI)。为了描述方便，以下将以请求的NSSAI的映射关系(mapping of Requested NSSAI)来表示HPLMN的一个或多个切片的信息。To sum up, the meaning of the information of one or more slices of HPLMN in the above description can also be replaced by HPLMN S-NSSAI or requested HPLMN S-NSSAI that has a mapping relationship with each S-NSSAI in the requested NSSAI (Requested NSSAI). Mapping of NSSAI (mapping of Requested NSSAI). For the convenience of description, the following will represent the information of one or more slices of HPLMN in terms of the mapping of Requested NSSAI.
在S502中，第一VPLMN AMF确定不支持终端设备请求接入的切片中的至少一个，也就是第一VPLMN无法支持终端设备请求接入的全部切片。在这种场景下，第一VPLMN AMF可以通过HPLMN尝试为终端设备寻找可以支持请求接入的全部切片的其他VPLMN的信息。In S502, the first VPLMN AMF determines that it does not support at least one of the slices that the terminal device requests to access, that is, the first VPLMN cannot support all the slices that the terminal device requests to access. In this scenario, the first VPLMN AMF can try to find information for the terminal device through HPLMN about other VPLMNs that can support all slices requested for access.
可选地，在S502之前，第一VPLMN AMF确定终端设备请求接入的一个或多个切片中是否存在第一VPLMN不支持的切片。Optionally, before S502, the first VPLMN AMF determines whether there are slices that the first VPLMN does not support in one or more slices that the terminal device requests to access.
在一种可能的实现方式中，第一VPLMN AMF可以根据终端设备的位置信息以及终端设备签约的网络切片信息判断是否存在第一VPLMN不支持的切片。In a possible implementation, the first VPLMN AMF can determine whether there is a slice that the first VPLMN does not support based on the location information of the terminal device and the network slice information contracted by the terminal device.
举例说明，终端设备可以向第一VPLMN AMF发送请求的NSSAI(Requested NSSAI)以及请求的NSSAI的映射关系(mapping of Requested NSSAI)，其中，请求的NSSAI(Requested NSSAI)包含VPLMN S-NSSAI-1、VPLMN S-NSSAI-2和VPLMN S-NSSAI-3。第一VPLMN AMF根据终端设备的位置信息以及终端设备签约的网络切片信息，确定在终端设备所在的位置部署有与HPLMN S-NSSAI-A具有映射关系的VPLMN S-NSSAI-1，与HPLMN S-NSSAI-B具有映射关系的VPLMN S-NSSAI-2，但是未部署有与HPLMN S-NSSAI-C具有映射关系的VPLMN S-NSSAI-3。因此，第一VPLMN仅支持与HPLMN S-NSSAI-A和HPLMN S-NSSAI-B具有映射关系的VPLMN S-NSSAI-1和VPLMN S-NSSAI-2，无法支持与HPLMN S-NSSAI-C具有映射关系的VPLMN S-NSSAI-3。For example, the terminal device can send the requested NSSAI (Requested NSSAI) and the mapping of the requested NSSAI (mapping of Requested NSSAI) to the first VPLMN AMF, where the requested NSSAI (Requested NSSAI) includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3. Based on the location information of the terminal device and the network slice information contracted by the terminal device, the first VPLMN AMF determines that VPLMN S-NSSAI-1 with a mapping relationship with HPLMN S-NSSAI-A is deployed at the location of the terminal device, and HPLMN S-NSSAI-1 NSSAI-B has VPLMN S-NSSAI-2 that has a mapping relationship, but VPLMN S-NSSAI-3 that has a mapping relationship with HPLMN S-NSSAI-C is not deployed. Therefore, the first VPLMN only supports VPLMN S-NSSAI-1 and VPLMN S-NSSAI-2 that have mapping relationships with HPLMN S-NSSAI-A and HPLMN S-NSSAI-B, and cannot support mapping with HPLMN S-NSSAI-C. Relationship of VPLMN S-NSSAI-3.
第一VPLMN AMF在确定第一VPLMN不支持终端设备请求接入的切片，即第一VPLMN不支持请求的NSSAI(Requested NSSAI)中的至少一个S-NSSAI的情况下，可以向HPLMN UDM发送第一指示信息，第一指示信息用于指示HPLMN UDM更新选网优先级。应理解，第一VPLMN不支持终端设备请求接入的切片中的至少一个，即第一VPLMN不支持请求的NSSAI(Requested NSSAI)中的至少一个S-NSSAI为触发第一VPLMN发送第一指示信息的条件。反之，如果第一VPLMN支持终端设备请求接入的全部切片，即第一VPLMN支持请求的NSSAI(Requested NSSAI)的全集，那么第一VPLMN AMF可以根据第一消息接受终端设备的接入请求，不再指示HPLMN重新选择其他的VPLMN。When the first VPLMN AMF determines that the first VPLMN does not support the slice requested by the terminal device to access, that is, the first VPLMN does not support at least one S-NSSAI in the requested NSSAI (Requested NSSAI), it may send the first S-NSSAI to the HPLMN UDM. Instruction information, the first instruction information is used to instruct HPLMN UDM to update the network selection priority. It should be understood that the first VPLMN does not support at least one of the slices requested by the terminal device to access, that is, the first VPLMN does not support at least one of the requested NSSAI (Requested NSSAI) S-NSSAI to trigger the first VPLMN to send the first indication information. conditions of. On the other hand, if the first VPLMN supports all the slices requested by the terminal device for access, that is, the first VPLMN supports the complete set of requested NSSAI (Requested NSSAI), then the first VPLMN AMF can accept the access request of the terminal device according to the first message. Then instruct HPLMN to select another VPLMN again.
示例性地，第一指示信息可以指示HPLMN UDM通过更新漫游引导(steering of roaming，SOR)信息以更新选网优先级。For example, the first indication information may instruct the HPLMN UDM to update the network selection priority by updating roaming guidance (steering of roaming, SOR) information.
其中，第一VPLMN AMF可以将第一指示信息、终端设备的位置信息以及请求的 NSSAI的映射关系(mapping of Requested NSSAI)封装在同一个消息中发送给HPLMN UDM，也可以将第一指示信息作为单独的消息发送给HPLMN UDM，本申请实施例对此不作限定。Wherein, the first VPLMN AMF may combine the first indication information, the location information of the terminal device and the requested The mapping of NSSAI (mapping of Requested NSSAI) is encapsulated in the same message and sent to the HPLMN UDM. The first indication information may also be sent to the HPLMN UDM as a separate message. This is not limited in the embodiment of the present application.
示例性地，第一VPLMN AMF可以先通过S502将终端设备的位置信息和请求的NSSAI的映射关系(mapping of Requested NSSAI)发送给HPLMN UDM，然后单独通过其他消息将第一指示信息发送给HPLMN UDM。For example, the first VPLMN AMF may first send the mapping relationship (mapping of Requested NSSAI) between the location information of the terminal device and the requested NSSAI to the HPLMN UDM through S502, and then send the first indication information to the HPLMN UDM through other messages separately. .
作为一种可能的示例，在第一VPLMN AMF发送第一指示信息之前，第一VPLMN AMF接收来自终端设备的第二指示信息，并根据第二指示信息确定需要为终端设备寻找其他的VPLMN。其中，第二指示信息可以携带在第一消息中，具体可参见在S501中对第二指示信息的描述，此处不再赘述。在S502中，第一VPLMN AMF向HPLMN UDM发送终端设备的位置信息可以是终端设备所在的物理位置，在一种可能的实现方式中，第一VPLMN AMF可以根据终端设备当前所在的追踪区域标识(tracking area identifier，TAI)确定该TAI对应的物理位置，其中，第一VPLMN中可以预配置TAI与物理区域之间的对应关系。As a possible example, before the first VPLMN AMF sends the first indication information, the first VPLMN AMF receives the second indication information from the terminal device, and determines that it is necessary to find other VPLMNs for the terminal device based on the second indication information. The second indication information may be carried in the first message. For details, please refer to the description of the second indication information in S501, which will not be described again here. In S502, the location information of the terminal device sent by the first VPLMN AMF to the HPLMN UDM may be the physical location of the terminal device. In a possible implementation, the first VPLMN AMF may identify the tracking area according to the current location of the terminal device ( tracking area identifier (TAI) determines the physical location corresponding to the TAI, where the corresponding relationship between the TAI and the physical area can be preconfigured in the first VPLMN.
在另一种可能的实现方式中，第一VPLMN AMF可以向位置管理功能(location management function，LMF)网元发送位置请求消息，以触发LMF网元对终端设备进行定位，得到终端设备的物理位置。其中，LMF对终端设备的定位流程可参考现有的实现方式，此处不多赘述。In another possible implementation, the first VPLMN AMF can send a location request message to a location management function (LMF) network element to trigger the LMF network element to locate the terminal device and obtain the physical location of the terminal device. . Among them, the positioning process of the terminal device by LMF can refer to the existing implementation method, and will not be described in detail here.
应理解，终端设备的位置信息用于HPLMN确定其他VPLMN是否在终端设备所在的位置部署了与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的HPLMN S-NSSAI具有映射关系的切片。It should be understood that the location information of the terminal device is used by the HPLMN to determine whether other VPLMNs have deployed slices with mapping relationships between the HPLMN S-NSSAI and the requested NSSAI (mapping of Requested NSSAI) at the location of the terminal device.
需要注意的是，在S502中，作为另一种可能的实现方式，在第一VPLMN不支持终端设备请求接入的切片中的至少一个的情况下，第一VPLMN AMF向HPLMN UDM发送终端设备的位置信息和VPLMN的一个或多个切片的信息，其中，VPLMN的一个或多个切片的信息指的是终端设备请求在第一VPLMN接入的一个或多个切片的信息，即请求的NSSAI(Requested NSSAI)。相应地，HPLMN UDM接收终端设备的位置信息和VPLMN的一个或多个切片的信息。可以理解为，这种实现方式下，第一VPLMN AMF可以不用确定HPLMN S-NSSAI(即mapping of Requested NSSAI)，第一VPLMN AMF直接向HPLMN UDM发送请求的NSSAI(Requested NSSAI)，然后HPLMN UDM根据第一VPLMN和HPLMN之间的漫游协议(如表2所示)进一步确定与请求的NSSAI(Requested NSSAI)中每一个S-NSSAI具有映射关系的HPLMN S-NSSAI，即HPLMN的一个或多个切片的信息(mapping of Requested NSSAI)。其中，第一VPLMN和HPLMN之间的漫游协议包含了第一VPLMN S-NSSAI和HPLMN S-NSSAI之间的映射关系。It should be noted that in S502, as another possible implementation manner, when the first VPLMN does not support at least one of the slices that the terminal device requests access to, the first VPLMN AMF sends the terminal device's UDM to the HPLMN UDM. Location information and information of one or more slices of VPLMN, where the information of one or more slices of VPLMN refers to the information of one or more slices that the terminal device requests to access in the first VPLMN, that is, the requested NSSAI ( Requested NSSAI). Accordingly, the HPLMN UDM receives the location information of the terminal device and the information of one or more slices of the VPLMN. It can be understood that under this implementation method, the first VPLMN AMF does not need to determine the HPLMN S-NSSAI (i.e. mapping of Requested NSSAI). The first VPLMN AMF directly sends the requested NSSAI (Requested NSSAI) to the HPLMN UDM, and then the HPLMN UDM The roaming agreement between the first VPLMN and HPLMN (as shown in Table 2) further determines the HPLMN S-NSSAI that has a mapping relationship with each S-NSSAI in the requested NSSAI (Requested NSSAI), that is, one or more slices of HPLMN Information (mapping of Requested NSSAI). Among them, the roaming agreement between the first VPLMN and HPLMN includes the mapping relationship between the first VPLMN S-NSSAI and HPLMN S-NSSAI.
举例说明，终端设备在第一消息中携带请求的NSSAI(Requested NSSAI)，其中，请求的NSSAI(Requested NSSAI)包含VPLMN S-NSSAI-1、VPLMN S-NSSAI-2和VPLMN S-NSSAI-3。当第一VPLMN不支持Requested NSSAI中的至少一个S-NSSAI时，第一VPLMN AMF可以将请求的NSSAI(Requested NSSAI，即表1中的VPLMN S-NSSAI-1、VPLMN S-NSSAI-2和VPLMN S-NSSAI-3)发送至HPLMN的UDM网元，HPLMN的UDM网元根据第一VPLMN S-NSSAI和HPLMN S-NSSAI之间的映射关系(如表2所示) 确定出VPLMN S-NSSAI-1和HPLMN S-NSSAI-A具有映射关系、VPLMN S-NSSAI-2和HPLMN S-NSSAI-B具有映射关系、VPLMN S-NSSAI-3和HPLMN S-NSSAI-C具有映射关系。进而HPLMN UDM可以根据映射关系确定HPLMN S-NSSAIs，即HPLMN的一个或多个切片的信息。For example, the terminal device carries the requested NSSAI (Requested NSSAI) in the first message, where the requested NSSAI (Requested NSSAI) includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3. When the first VPLMN does not support at least one S-NSSAI in the Requested NSSAI, the first VPLMN AMF may transfer the requested NSSAI (Requested NSSAI, that is, VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN in Table 1 S-NSSAI-3) is sent to the UDM network element of HPLMN. The UDM network element of HPLMN is based on the mapping relationship between the first VPLMN S-NSSAI and HPLMN S-NSSAI (as shown in Table 2) It is determined that VPLMN S-NSSAI-1 and HPLMN S-NSSAI-A have a mapping relationship, VPLMN S-NSSAI-2 and HPLMN S-NSSAI-B have a mapping relationship, VPLMN S-NSSAI-3 and HPLMN S-NSSAI-C have a mapping relationship Mapping relations. Then HPLMN UDM can determine HPLMN S-NSSAIs, that is, the information of one or more slices of HPLMN according to the mapping relationship.
S503，HPLMN UDM向HPLMN NSSF发送终端设备的位置信息和请求的NSSAI的映射关系(mapping of Requested NSSAI)。相应地，NSSF网元接收终端设备的位置信息和请求的NSSAI的映射关系(mapping of Requested NSSAI)。S503, HPLMN UDM sends the mapping relationship (mapping of Requested NSSAI) between the location information of the terminal device and the requested NSSAI to HPLMN NSSF. Correspondingly, the NSSF network element receives the mapping relationship (mapping of Requested NSSAI) between the location information of the terminal device and the requested NSSAI.
S504，HPLMN NSSF基于终端设备的位置信息和请求的NSSAI的映射关系(mapping of Requested NSSAI)，确定候选VPLMN。S504. The HPLMN NSSF determines the candidate VPLMN based on the mapping relationship (mapping of Requested NSSAI) between the location information of the terminal device and the requested NSSAI.
在S504中，候选VPLMN的数量为至少一个，具体包括以下两种情况：In S504, the number of candidate VPLMNs is at least one, including the following two situations:
情况1：候选VPLMN的数量为至少一个，且该候选VPLMN在终端设备所在的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的所有HPLMN S-NSSAI具有映射关系的切片，或者理解为，候选VPLMN在终端设备的位置部署的切片可以与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的所有HPLMN S-NSSAI进行映射，这种情况下可以将该候选VPLMN确定为第二VPLMN。下文将结合图6对针对情况1的网络选择方法进行介绍。Case 1: The number of candidate VPLMN is at least one, and the candidate VPLMN supports all HPLMN S-NSSAI slices with mapping relationships included in the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device, or It is understood that the slice deployed by the candidate VPLMN at the location of the terminal device can be mapped with all HPLMN S-NSSAI included in the mapping of Requested NSSAI. In this case, the candidate VPLMN can be determined as the second VPLMN. The network selection method for case 1 will be introduced below with reference to Figure 6.
举例说明，结合前面的示例，请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含HPLMN S-NSSAI-A、HPLMN S-NSSAI-B和HPLMN S-NSSAI-C。For example, based on the previous example, the mapping of requested NSSAI includes HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C.
候选VPLMN在终端设备所在的位置支持的切片包括：切片N1、切片N2和切片N3，其中，切片N1、切片N2和切片N3均是候选PLMN S-NSSAI标识的切片，候选VPLMN S-NSSAI-N1用于标识切片N1，候选VPLMN S-NSSAI-N2用于标识切片N2，候选VPLMN S-NSSAI-N3用于标识切片N3。其中，候选VPLMN S-NSSAI-N1与HPLMN S-NSSAI-A具有映射关系，候选VPLMN S-NSSAI-N2与HPLMN S-NSSAI-B具有映射关系，候选VPLMN S-NSSAI-N3与HPLMN S-NSSAI-C具有映射关系，即与候选VPLMN支持的切片具有映射关系的HPLMN的切片包括HPLMN S-NSSAI-A、HPLMN S-NSSAI-B以及HPLMN S-NSSAI-C，即，候选VPLMN在终端设备所在的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的所有HPLMN S-NSSAI具有映射关系的切片。The slices supported by the candidate VPLMN at the location of the terminal device include: slice N1, slice N2 and slice N3. Among them, slice N1, slice N2 and slice N3 are all slices identified by the candidate PLMN S-NSSAI, and the candidate VPLMN S-NSSAI-N1 It is used to identify slice N1, candidate VPLMN S-NSSAI-N2 is used to identify slice N2, and candidate VPLMN S-NSSAI-N3 is used to identify slice N3. Among them, candidate VPLMN S-NSSAI-N1 has a mapping relationship with HPLMN S-NSSAI-A, candidate VPLMN S-NSSAI-N2 has a mapping relationship with HPLMN S-NSSAI-B, candidate VPLMN S-NSSAI-N3 has a mapping relationship with HPLMN S-NSSAI -C has a mapping relationship, that is, the HPLMN slices that have a mapping relationship with the slices supported by the candidate VPLMN include HPLMN S-NSSAI-A, HPLMN S-NSSAI-B, and HPLMN S-NSSAI-C, that is, the candidate VPLMN is located where the terminal device is The location supports all HPLMN S-NSSAI slices that have a mapping relationship with the mapping of the requested NSSAI.
需要说明的是，候选VPLMN在终端设备所在的位置除了支持切片N1、切片N2和切片N3，还可以支持其他的切片，本申请在此并不限制。It should be noted that in addition to slice N1, slice N2 and slice N3, the candidate VPLMN may also support other slices at the location of the terminal device, which is not limited by this application.
可选地，存在多个候选VPLMN在终端设备所在的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的所有HPLMN S-NSSAI具有映射关系的切片。Optionally, there are multiple candidate VPLMNs that support slices with mapping relationships for all HPLMN S-NSSAIs contained in the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device.
作为一种可能的实现方式，HPLMN NSSF可以将多个候选VPLMN中的任意一个候选VPLMN确定为第二VPLMN，并向HPLMN UDM发送第二VPLMN的信息，以指示HPLMN UDM调整第二VPLMN的选网优先级高于第一VPLMN的选网优先级。As a possible implementation method, the HPLMN NSSF can determine any one of the multiple candidate VPLMNs as the second VPLMN, and send the second VPLMN information to the HPLMN UDM to instruct the HPLMN UDM to adjust the network selection of the second VPLMN. The priority is higher than the network selection priority of the first VPLMN.
作为另一种可能的实现方式，HPLMN NSSF可以向HPLMN UDM发送将这多个候选VPLMN确定为第二VPLMN，并向HPLMN UDM发送第二VPLMN的信息，以指示HPLMN UDM调整该多个第二VPLMN的选网优先级高于第一VPLMN的选网优先级。 As another possible implementation, the HPLMN NSSF may send information identifying the multiple candidate VPLMNs as the second VPLMN and send the second VPLMN information to the HPLMN UDM to instruct the HPLMN UDM to adjust the multiple second VPLMNs. The network selection priority of the VPLMN is higher than the network selection priority of the first VPLMN.
情况2：候选VPLMN的数量为至少一个，且该候选VPLMN在终端设备的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的部分HPLMN S-NSSAI具有映射关系的切片，或者理解为，候选VPLMN在终端设备的位置部署的切片可以与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的部分HPLMN S-NSSAI进行映射，这种情况下可以由终端设备在该至少一个候选VPLMN中确定出第二VPLMN。下文将结合图7对针对情况2的网络选择方法进行介绍。Case 2: The number of candidate VPLMN is at least one, and the candidate VPLMN supports the mapping relationship with the requested NSSAI (mapping of Requested NSSAI) at the location of the terminal device. Some HPLMN S-NSSAI slices that have a mapping relationship, or understand Therefore, the slice deployed by the candidate VPLMN at the location of the terminal device can be mapped with part of the HPLMN S-NSSAI included in the mapping of the requested NSSAI. In this case, the terminal device can be used in at least one candidate The second VPLMN is determined among the VPLMNs. The network selection method for case 2 will be introduced below with reference to Figure 7.
举例说明，结合前面的示例，请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含HPLMN S-NSSAI-A、HPLMN S-NSSAI-B和HPLMN S-NSSAI-C。For example, based on the previous example, the mapping of requested NSSAI includes HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C.
候选VPLMN包括候选VPLMN#1、候选VPLMN#2和候选VPLMN#3。其中，VPLMN#1在终端设备所在的位置支持的切片包括：切片B1和切片B3，候选VPLMN#2在终端设备所在的位置支持的切片包括：切片C2和切片C3，VPLMN#3在终端设备所在的位置支持的切片包括：切片D1和切片D2。其中，候选VPLMN#1 S-NSSAI-B1用于标识切片B1，候选VPLMN#1 S-NSSAI-B3用于标识切片B3。候选VPLMN#2 S-NSSAI-C2用于标识切片C2，候选VPLMN#2 S-NSSAI-C3用于标识切片C3。候选VPLMN#3 S-NSSAI-D1用于标识切片D1，候选VPLMN#3 S-NSSAI-D2用于标识切片D2。The candidate VPLMN includes candidate VPLMN#1, candidate VPLMN#2 and candidate VPLMN#3. Among them, the slices supported by VPLMN#1 at the location of the terminal device include: slice B1 and slice B3. The slices supported by candidate VPLMN#2 at the location of the terminal device include: slice C2 and slice C3. VPLMN#3 at the location of the terminal device. The slices supported by the position include: slice D1 and slice D2. Among them, candidate VPLMN#1 S-NSSAI-B1 is used to identify slice B1, and candidate VPLMN#1 S-NSSAI-B3 is used to identify slice B3. Candidate VPLMN#2 S-NSSAI-C2 is used to identify slice C2, and candidate VPLMN#2 S-NSSAI-C3 is used to identify slice C3. Candidate VPLMN#3 S-NSSAI-D1 is used to identify slice D1, and candidate VPLMN#3 S-NSSAI-D2 is used to identify slice D2.
候选VPLMN支持的S-NSSAI以及候选VPLMN S-NSSAI和HPLMN S-NSSAI之间的映射关系如表3所示。The S-NSSAI supported by candidate VPLMN and the mapping relationship between candidate VPLMN S-NSSAI and HPLMN S-NSSAI are shown in Table 3.
表3
table 3
其中，候选VPLMN#1 S-NSSAI-B1与HPLMN S-NSSAI-A具有映射关系，候选VPLMN#1 S-NSSAI-B3与HPLMN S-NSSAI-C具有映射关系，即与候选VPLMN#1支持的切片具有映射关系的HPLMN的切片包括HPLMN S-NSSAI-A以及HPLMN S-NSSAI-C，不包括HPLMN S-NSSAI-B，即，候选VPLMN#1在终端设备所在的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的部分HPLMN S-NSSAI具有映射关系的切片。Among them, candidate VPLMN#1 S-NSSAI-B1 has a mapping relationship with HPLMN S-NSSAI-A, and candidate VPLMN#1 S-NSSAI-B3 has a mapping relationship with HPLMN S-NSSAI-C, that is, with the candidate VPLMN#1 supported The slice of HPLMN with mapping relationship includes HPLMN S-NSSAI-A and HPLMN S-NSSAI-C, excluding HPLMN S-NSSAI-B, that is, candidate VPLMN#1 supports the requested NSSAI at the location of the terminal device. Some HPLMN S-NSSAI slices contained in the mapping relationship (mapping of Requested NSSAI) have mapping relationships.
其中，候选VPLMN#2 S-NSSAI-C2与HPLMN S-NSSAI-B具有映射关系，候选VPLMN#2 S-NSSAI-C3与HPLMN S-NSSAI-C具有映射关系，即与候选VPLMN#2支持的切片具有映射关系的HPLMN的切片包括HPLMN S-NSSAI-B以及HPLMN S-NSSAI-C，不包括HPLMN S-NSSAI-A，即，候选VPLMN在终端设备所在的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的部分HPLMN S-NSSAI具有映射关系的切片。 Among them, candidate VPLMN#2 S-NSSAI-C2 has a mapping relationship with HPLMN S-NSSAI-B, and candidate VPLMN#2 S-NSSAI-C3 has a mapping relationship with HPLMN S-NSSAI-C, that is, with the candidate VPLMN#2 supported Slices of HPLMN with mapping relationships include HPLMN S-NSSAI-B and HPLMN S-NSSAI-C, excluding HPLMN S-NSSAI-A. That is, the candidate VPLMN supports the mapping relationship with the requested NSSAI at the location of the terminal device. Some HPLMN S-NSSAI slices contained in (mapping of Requested NSSAI) have mapping relationships.
其中，候选VPLMN#3 S-NSSAI-D1与HPLMN S-NSSAI-A具有映射关系，候选VPLMN#3 S-NSSAI-D2与HPLMN S-NSSAI-B具有映射关系，即与候选VPLMN#3支持的切片具有映射关系的HPLMN的切片包括HPLMN S-NSSAI-A以及HPLMN S-NSSAI-B，不包括HPLMN S-NSSAI-C，即，候选VPLMN在终端设备所在的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的部分HPLMN S-NSSAI具有映射关系的切片。Among them, candidate VPLMN#3 S-NSSAI-D1 has a mapping relationship with HPLMN S-NSSAI-A, and candidate VPLMN#3 S-NSSAI-D2 has a mapping relationship with HPLMN S-NSSAI-B, that is, with the candidate VPLMN#3 supported The slice of HPLMN with mapping relationship includes HPLMN S-NSSAI-A and HPLMN S-NSSAI-B, excluding HPLMN S-NSSAI-C, that is, the candidate VPLMN supports the mapping relationship with the requested NSSAI at the location of the terminal device. Some HPLMN S-NSSAI slices contained in (mapping of Requested NSSAI) have mapping relationships.
应理解，本申请实施例中将最终确定的选网优先级高于第一VPLMN的VPLMN称为第二VPLMN。在情况1中，第二VPLMN由HPLMN NSSF确定，且第二VPLMN可以支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的所有HPLMN S-NSSAI具有映射关系的切片。在情况2中，第二VPLMN由终端设备确定，第二VPLMN可以支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的部分HPLMN S-NSSAI具有映射关系的切片。It should be understood that in the embodiment of the present application, the VPLMN whose final network selection priority is higher than the first VPLMN is called the second VPLMN. In case 1, the second VPLMN is determined by the HPLMN NSSF, and the second VPLMN can support slices that have a mapping relationship with all HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI) of the requested NSSAI. In case 2, the second VPLMN is determined by the terminal device, and the second VPLMN can support slices that have a mapping relationship with some HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI).
综上，根据上文示例性描述的映射关系可知，终端设备若想要访问HPLMN S-NSSAI-A、HPLMN S-NSSAI-B以及HPLMN S-NSSAI-C对应的业务，由于VPLMN S-NSSAI-1与HPLMN S-NSSAI-A具有映射关系，VPLMN S-NSSAI-2与HPLMN S-NSSAI-B具有映射关系，VPLMN S-NSSAI-3与HPLMN S-NSSAI-C具有映射关系，因此，终端设备可以请求在第一VPLMN中接入VPLMN S-NSSAI-1、VPLMN S-NSSAI-2以及VPLMN S-NSSAI-3即可。In summary, according to the mapping relationship illustratively described above, if the terminal device wants to access the services corresponding to HPLMN S-NSSAI-A, HPLMN S-NSSAI-B, and HPLMN S-NSSAI-C, since VPLMN S-NSSAI- 1 has a mapping relationship with HPLMN S-NSSAI-A, VPLMN S-NSSAI-2 has a mapping relationship with HPLMN S-NSSAI-B, VPLMN S-NSSAI-3 has a mapping relationship with HPLMN S-NSSAI-C, therefore, the terminal equipment You can request to access VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3 in the first VPLMN.
对第一VPLMN而言，第一VPLMN AMF可以根据与请求的NSSAI(Requested NSSAI)中每一个S-NSSAI具有映射关系的HPLMN S-NSSAI确定终端设备实际想要访问的请求的NSSAI的映射关系(mapping of Requested NSSAI)。第一VPLMN AMF可以将请求的NSSAI的映射关系(mapping of Requested NSSAI)通过HPLMN UDM发送给HPLMN NSSF，以使HPLMN NSSF根据终端设备的位置信息和请求的NSSAI的映射关系(mapping of Requested NSSAI)确定候选VPLMN。For the first VPLMN, the first VPLMN AMF can determine the mapping relationship of the requested NSSAI that the terminal device actually wants to access based on the HPLMN S-NSSAI that has a mapping relationship with each S-NSSAI in the requested NSSAI (Requested NSSAI) ( mapping of Requested NSSAI). The first VPLMN AMF can send the mapping of the requested NSSAI to the HPLMN NSSF through the HPLMN UDM, so that the HPLMN NSSF determines based on the location information of the terminal device and the mapping of the requested NSSAI. Candidate VPLMN.
下面针对S504中HPLMN NSSF具体如何确定候选VPLMN进行描述。The following describes how the HPLMN NSSF in S504 specifically determines the candidate VPLMN.
HPLMN NSSF存储有漫游协议，该漫游协议指示了多个不同的VPLMN部署的切片与HPLMN部署的切片之间的映射关系。结合图1所描述的不同VPLMN与HPLMN的切片的映射关系可以理解，终端设备在第一VPLMN请求的(NSSAI Requested NSSAI)中的每一个S-NSSAI分别与请求的NSSAI的映射关系(mapping of Requested NSSAI)中的HPLMN S-NSSAI具有映射关系，因此，第一VPLMN AMF可以将请求的NSSAI的映射关系(mapping of Requested NSSAI)发送给HPLMN NSSF，从而使HPLMN NSSF确定出哪些VPLMN支持的切片包括与请求的NSSAI的映射关系(mapping of Requested NSSAI)中的HPLMN S-NSSAI具有映射关系的切片。The HPLMN NSSF stores a roaming agreement, which indicates the mapping relationship between multiple different VPLMN deployed slices and HPLMN deployed slices. Combining the mapping relationships of different VPLMN and HPLMN slices described in Figure 1, it can be understood that the terminal device has a mapping relationship (mapping of Requested) between each S-NSSAI in the first VPLMN request (NSSAI Requested NSSAI) and the requested NSSAI respectively. The HPLMN S-NSSAI in the NSSAI has a mapping relationship. Therefore, the first VPLMN AMF can send the mapping of the requested NSSAI to the HPLMN NSSF, so that the HPLMN NSSF determines which slices supported by the VPLMN include and The HPLMN S-NSSAI in the mapping of Requested NSSAI has a slice of the mapping relationship.
S504可以具体为：HPLMN NSSF向一个或者多个其他VPLMN的NSSF网元发送第二消息，第二消息包括终端设备的位置信息和HPLMN的一个或多个切片的信息，即请求的NSSAI的映射关系(mapping of Requested NSSAI)，第二消息用于请求该一个或者多个其他VPLMN中每个NSSF判断是否在终端设备的位置信息所指示的位置部署了与请求的NSSAI的映射关系(mapping of Requested NSSAI)具有映射关系的切片；HPLMN NSSF从该一个或者多个其他VPLMN中的NSSF接收第二消息的响应消息，其中，第二消息的 响应消息可以指示一个或者多个其他VPLMN中每个其他VPLMN在终端设备所在的位置是否部署了与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的HPLMN S-NSSAI具有映射关系的切片；HPLMN NSSF根据第二消息的响应消息判断哪些VPLMN在终端设备所在的位置部署了与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的HPLMN S-NSSAI具有映射关系的切片，并将这些VPLMN确定为候选VPLMN。S504 may be specifically: the HPLMN NSSF sends a second message to the NSSF network elements of one or more other VPLMNs. The second message includes the location information of the terminal device and the information of one or more slices of the HPLMN, that is, the mapping relationship of the requested NSSAI. (mapping of Requested NSSAI), the second message is used to request each NSSF in one or more other VPLMNs to determine whether a mapping relationship with the requested NSSAI (mapping of Requested NSSAI) is deployed at the location indicated by the location information of the terminal device. ) a slice with a mapping relationship; the HPLMN NSSF receives the response message of the second message from the NSSF in the one or more other VPLMNs, where the The response message may indicate whether each of one or more other VPLMNs has deployed a slice with a mapping relationship with the HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI) at the location of the terminal device; The HPLMN NSSF determines, based on the response message of the second message, which VPLMNs have deployed the HPLMN S-NSSAI slices contained in the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device, and assigns these VPLMN Identified as a candidate VPLMN.
应理解，HPLMN NSSF是与一个或者多个其他VPLMN中的每个其他VPLMN单独进行交互。每个其他VPLMN可以将与在终端设备所在的位置支持的切片具有映射关系的HPLMN的切片的信息发送给HPLMN NSSF，由HPLMN NSSF根据接收到的每个其他VPLMN发送的HPLMN的切片的信息从一个或多个其他VPLMN中确定候选VPLMN。It should be understood that the HPLMN NSSF interacts individually with each of the one or more other VPLMNs. Each other VPLMN may send the information of the HPLMN's slice that has a mapping relationship with the slice supported at the location of the terminal device to the HPLMN NSSF, and the HPLMN NSSF sends the information of the HPLMN's slice based on the information received by each other VPLMN from one or multiple other VPLMNs to determine the candidate VPLMN.
例如，如果其他VPLMN判断在终端设备所在的位置部署了与请求的NSSAI的映射关系(mapping of Requested NSSAI)具有映射关系的一个或者多个切片，则在第二消息的响应消息中携带一个或者多个HPLMN S-NSSAI，其中，第二消息的响应消息中携带的一个或者多个HPLMN S-NSSAI属于请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的HPLMN S-NSSAI，该一个或者多个HPLMN S-NSSAI用于指示HPLMN NSSF：该VPLMN支持与该一个或者多个HPLMN S-NSSAI具有映射关系的一个或者多个切片。例如，如果其他VPLMN判断在终端设备所在的位置没有部署任一与请求的NSSAI的映射关系(mapping of Requested NSSAI)具有映射关系的切片，则在第二消息的响应消息中携带指示信息，该指示信息用于指示HPLMN NSSF：该VPLMN不支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)具有映射关系的切片。For example, if other VPLMN determines that one or more slices that have a mapping relationship with the requested NSSAI (mapping of Requested NSSAI) are deployed at the location of the terminal device, then the response message of the second message carries one or more slices. HPLMN S-NSSAI, wherein one or more HPLMN S-NSSAI carried in the response message of the second message belongs to the HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI) of the requested NSSAI, and the one or more HPLMN S-NSSAI An HPLMN S-NSSAI is used to indicate an HPLMN NSSF: the VPLMN supports one or more slices that have a mapping relationship with the one or more HPLMN S-NSSAI. For example, if other VPLMN determines that no slice with a mapping relationship (mapping of Requested NSSAI) is deployed at the location of the terminal device, the response message of the second message will carry indication information. The indication The information is used to indicate HPLMN NSSF: This VPLMN does not support slices with a mapping relationship (mapping of Requested NSSAI) to the requested NSSAI.
在一种可能的实现方式中，HPLMN NSSF根据漫游协议和请求的NSSAI的映射关系(mapping of Requested NSSAI)确定哪些VPLMN部署的切片可以与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的HPLMN S-NSSAI具有映射关系。可理解为，漫游协议可以只确定哪些VPLMN部署的切片可以与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的HPLMN S-NSSAI具有映射关系，但是无法确定是否在终端所在的位置部署了这些切片。在这种实现方式中，HPLMN NSSF确定部署了与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的HPLMN S-NSSAI具有映射关系的切片的VPLMN为该一个或多个其他VPLMN。进一步地，HPLMN NSSF根据终端设备的位置信息确定候选VPLMN。其中，候选VPLMN在终端设备的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的HPLMN S-NSSAI具有映射关系的切片。In a possible implementation, the HPLMN NSSF determines which VPLMN deployed slices can be included in the mapping of the requested NSSAI (mapping of Requested NSSAI) based on the roaming agreement and the requested NSSAI. HPLMN S-NSSAI has a mapping relationship. It can be understood that the roaming agreement can only determine which VPLMN deployed slices can have a mapping relationship with the HPLMN S-NSSAI included in the mapping of Requested NSSAI, but it cannot determine whether it is deployed at the location of the terminal. These slices. In this implementation, the HPLMN NSSF determines that the VPLMN deploying the slice that has a mapping relationship with the HPLMN S-NSSAI contained in the mapping of Requested NSSAI is one or more other VPLMNs. Further, the HPLMN NSSF determines the candidate VPLMN based on the location information of the terminal device. Among them, the candidate VPLMN supports a slice with a mapping relationship with the HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI) at the location of the terminal device.
举例说明，HPLMN NSSF从HPLMN UDM接收到的请求的NSSAI的映射关系(mapping of Requested NSSAI)包括HPLMN S-NSSAI-A、HPLMN S-NSSAI-B以及HPLMN S-NSSAI-C。HPLMN NSSF上预先配置了哪些VPLMN跟HPLMN具有漫游协议，如表4所示，VPLMN#1支持的切片包括VPLMN#1 S-NSSAI-X1、VPLMN#1 S-NSSAI-X2以及VPLMN#1 S-NSSAI-X3，VPLMN#2支持的切片包括VPLMN#2 S-NSSAI-Y1和VPLMN#2 S-NSSAI-Y2，VPLMN#3支持的切片包括VPLMN#3 S-NSSAI-Z1。其中，VPLMN#1 S-NSSAI与HPLMN S-NSSAI之间的映射关系、VPLMN#2 S-NSSAI与HPLMN S-NSSAI之间的映射关系、VPLMN#3 S-NSSAI与HPLMN S-NSSAI之间的映射关系如表4所示。 For example, the mapping of requested NSSAI received by HPLMN NSSF from HPLMN UDM includes HPLMN S-NSSAI-A, HPLMN S-NSSAI-B, and HPLMN S-NSSAI-C. Which VPLMNs have roaming agreements with HPLMN pre-configured on the HPLMN NSSF. As shown in Table 4, the slices supported by VPLMN#1 include VPLMN#1 S-NSSAI-X1, VPLMN#1 S-NSSAI-X2 and VPLMN#1 S- NSSAI-X3, the slices supported by VPLMN#2 include VPLMN#2 S-NSSAI-Y1 and VPLMN#2 S-NSSAI-Y2, and the slices supported by VPLMN#3 include VPLMN#3 S-NSSAI-Z1. Among them, the mapping relationship between VPLMN#1 S-NSSAI and HPLMN S-NSSAI, the mapping relationship between VPLMN#2 S-NSSAI and HPLMN S-NSSAI, the mapping relationship between VPLMN#3 S-NSSAI and HPLMN S-NSSAI The mapping relationship is shown in Table 4.
HPLMN NSSF向VPLMN#1、VPLMN#2以及VPLMN#3分别发送第二消息，该第二消息中包括终端设备的位置信息以及请求的NSSAI的映射关系(mapping of Requested NSSAI)。其中，VPLMN#1在接收到第二消息后，确定在终端设备所在的位置部署的VPLMN#1 S-NSSAI-X1与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的HPLMN S-NSSAI-A具有映射关系、在终端设备所在的位置部署的VPLMN#1 S-NSSAI-X2与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的HPLMN S-NSSAI-B具有映射关系、VPLMN#1 S-NSSAI-X3与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的HPLMN S-NSSAI-C具有映射关系。The HPLMN NSSF sends a second message to VPLMN#1, VPLMN#2, and VPLMN#3 respectively. The second message includes the location information of the terminal device and the mapping of the requested NSSAI (mapping of Requested NSSAI). Among them, after receiving the second message, VPLMN#1 determines the mapping relationship (mapping of Requested NSSAI) between the VPLMN#1 S-NSSAI-X1 deployed at the location of the terminal device and the HPLMN S-NSSAI- A has a mapping relationship, the mapping relationship between VPLMN#1 S-NSSAI-X2 deployed at the location of the terminal device and the requested NSSAI (mapping of Requested NSSAI) contains HPLMN S-NSSAI-B, which has a mapping relationship, VPLMN#1 S -NSSAI-X3 has a mapping relationship with HPLMN S-NSSAI-C contained in the mapping of Requested NSSAI.
类似的，VPLMN#2在接收到第二消息后，确定在终端设备所在的位置部署的VPLMN#2 S-NSSAI-Y1与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的HPLMN S-NSSAI-A具有映射关系、在终端设备所在的位置部署的VPLMN#2 S-NSSAI-Y2与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的HPLMN S-NSSAI-B具有映射关系。Similarly, after receiving the second message, VPLMN#2 determines the mapping relationship (mapping of Requested NSSAI) between the VPLMN#2 S-NSSAI-Y1 deployed at the location of the terminal device and the HPLMN S-NSSAI included in the requested NSSAI. -A has a mapping relationship. The VPLMN#2 S-NSSAI-Y2 deployed at the location of the terminal device has a mapping relationship with the HPLMN S-NSSAI-B included in the mapping of Requested NSSAI (mapping of Requested NSSAI).
类似的，VPLMN#3在接收到第二消息后，确定在终端设备所在的位置部署的VPLMN#3 S-NSSAI-Z1与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的HPLMN S-NSSAI-A具有映射关系。Similarly, after receiving the second message, VPLMN#3 determines the mapping relationship (mapping of Requested NSSAI) between the VPLMN#3 S-NSSAI-Z1 deployed at the location of the terminal device and the HPLMN S-NSSAI contained in the requested NSSAI. -A has a mapping relationship.
因此，VPLMN#1可以向HPLMN NSSF发送第二消息的响应消息，指示VPLMN#1在终端设备所在的位置支持的切片分别与HPLMN S-NSSAI-A、HPLMN S-NSSAI-B和HPLMN S-NSSAI-C具有映射关系。VPLMN#2可以向HPLMN NSSF发送第二消息的响应消息，指示VPLMN#2在终端设备所在的位置支持的切片分别与HPLMN S-NSSAI-A和HPLMN S-NSSAI-B具有映射关系。VPLMN#3可以向HPLMN NSSF发送第二消息的响应消息，指示VPLMN#3在终端设备所在的位置支持的切片与HPLMN S-NSSAI-A具有映射关系。Therefore, VPLMN #1 can send a response message of the second message to HPLMN NSSF, indicating that the slices supported by VPLMN #1 at the location of the terminal device are respectively the same as HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI. -C has a mapping relationship. VPLMN#2 may send a response message of the second message to HPLMN NSSF, indicating that the slices supported by VPLMN#2 at the location of the terminal device have mapping relationships with HPLMN S-NSSAI-A and HPLMN S-NSSAI-B respectively. VPLMN#3 may send a response message of the second message to HPLMN NSSF, indicating that the slice supported by VPLMN#3 at the location of the terminal device has a mapping relationship with HPLMN S-NSSAI-A.
HPLMN NSSF接收到VPLMN#1、VPLMN#2以及VPLMN#3发送的第二消息的响应消息之后，确定VPLMN#1在终端设备所在的位置支持的切片包括与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的所有HPLMN S-NSSAI具有映射关系的切片，确定VPLMN#2在终端设备所在的位置支持的切片包括与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的HPLMN S-NSSAI-A和HPLMN S-NSSAI-B具有映射关系的切片，VPLMN#3在终端设备所在的位置支持的切片包括与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的HPLMN S-NSSAI-A具有映射关系的切片。After receiving the response message of the second message sent by VPLMN#1, VPLMN#2 and VPLMN#3, the HPLMN NSSF determines that the slices supported by VPLMN#1 at the location of the terminal device include the mapping relationship with the requested NSSAI (mapping of Requested NSSAI) contains all HPLMN S-NSSAI slices with mapping relationships. Determine that the slices supported by VPLMN#2 at the location of the terminal device include the HPLMN S-NSSAI-A contained in the mapping relationship (mapping of Requested NSSAI). A slice that has a mapping relationship with HPLMN S-NSSAI-B. The slice supported by VPLMN#3 at the location of the terminal device includes a mapping relationship with the requested NSSAI (mapping of Requested NSSAI) and contains a mapping relationship with HPLMN S-NSSAI-A. of slices.
基于上文中描述的情况1可知，由于与HPLMN NSSF交互的VPLMN#1、VPLMN#2以及VPLMN#3中的VPLMN#1在终端设备的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的所有HPLMN S-NSSAI具有映射关系的切片，因此HPLMN NSSF可以将VPLMN#1确定为候选VPLMN。Based on the situation 1 described above, it can be seen that VPLMN#1, VPLMN#2 and VPLMN#1 in VPLMN#3 that interact with HPLMN NSSF support the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device. All HPLMN S-NSSAI contained slices have mapping relationships, so HPLMN NSSF can determine VPLMN#1 as a candidate VPLMN.
表4

Table 4

在另一种可能的实现方式中，HPLMN NSSF向一个或多个其他VPLMN分别发送请求消息，请求消息中携带终端设备的位置信息和请求的NSSAI的映射关系(mapping of Requested NSSAI)，请求该一个或多个其他VPLMN将在终端设备所在的位置部署的切片的信息发送至HPLMN NSSF。进一步地，HPLMN NSSF根据该一个或多个其他VPLMN在终端设备所在的位置部署的切片的信息以及mapping of Requested NSSAI，将部署了与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的HPLMN S-NSSAI具有映射关系的切片的VPLMN确定为候选VPLMN。In another possible implementation, the HPLMN NSSF sends request messages to one or more other VPLMNs respectively. The request messages carry the mapping relationship (mapping of Requested NSSAI) between the location information of the terminal device and the requested NSSAI. or multiple other VPLMNs send information about slices deployed at the location of the end device to the HPLMN NSSF. Further, the HPLMN NSSF deploys the HPLMN S contained in the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI based on the information of the slices deployed by one or more other VPLMNs at the location of the terminal device and the mapping of Requested NSSAI. - The VPLMN of the slice with NSSAI mapping relationship is determined as the candidate VPLMN.
应理解，在本实现方式中，HPLMN NSSF可以在不考虑哪些VPLMN部署的切片可以与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的HPLMN S-NSSAI具有映射关系的前提下与一个或多个其他VPLMN进行交互。也即，与HPLMN NSSF交互的一个或多个其他VPLMN部署的切片不一定与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的HPLMN S-NSSAI具有映射关系。It should be understood that in this implementation, the HPLMN NSSF can have a mapping relationship with one or more HPLMN S-NSSAIs contained in the mapping relationship (mapping of Requested NSSAI) of the VPLMN deployment without considering which slices deployed by the VPLMN can have a mapping relationship with the requested NSSAI. Multiple other VPLMNs interact. That is, the slices deployed by one or more other VPLMNs that interact with the HPLMN NSSF do not necessarily have a mapping relationship with the HPLMN S-NSSAI contained in the mapping of the requested NSSAI.
举例说明，结合前面描述的示例，与HPLMN NSSF交互的其他VPLMN除了VPLMN#1、VPLMN#2以及VPLMN#3之外，还包括VPLMN#4。HPLMN NSSF向VPLMN#4发送第二消息，第二消息包括终端设备的位置信息和请求的NSSAI的映射关系(mapping of Requested NSSAI)。VPLMN#4在接收到第二消息之后，VPLMN#4可以根据请求的NSSAI的映射关系(mapping of Requested NSSAI)确定在终端设备所在的位置部署的切片与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的HPLMN S-NSSAI-A、HPLMN S-NSSAI-B和HPLMN S-NSSAI-C均不具有映射关系，因此，VPLMN#4可以向HPLMN NSSF发送第二消息的响应消息，该第二消息的响应消息可以指示VPLMN#4在终端设备所在的位置部署的切片与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的HPLMN S-NSSAI均不具有映射关系。HPLMN NSSF接收到VPLMN#4的第二消息的响应消息，确定VPLMN#4在终端设备所在的位置部署的切片与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的HPLMN S-NSSAI均不具有映射关系，因此HPLMN NSSF可以排除VPLMN#4，从VPLMN#1、VPLMN#2和VPLMN#3中确定候选VPLMN。For example, combined with the example described above, other VPLMNs interacting with the HPLMN NSSF include VPLMN#4 in addition to VPLMN#1, VPLMN#2, and VPLMN#3. HPLMN NSSF sends a second message to VPLMN#4. The second message includes the mapping relationship (mapping of Requested NSSAI) between the location information of the terminal device and the requested NSSAI. After VPLMN#4 receives the second message, VPLMN#4 can determine the mapping relationship (mapping of Requested NSSAI) between the slice deployed at the location of the terminal device and the requested NSSAI based on the mapping of the requested NSSAI. ) contained in HPLMN S-NSSAI-A, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C have no mapping relationship. Therefore, VPLMN#4 can send the response message of the second message to HPLMN NSSF. The second message The response message of the message may indicate that none of the HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI) between the slice deployed by VPLMN#4 at the location of the terminal device and the requested NSSAI has a mapping relationship. HPLMN NSSF receives the response message of VPLMN#4's second message and determines that none of the HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI) between the slice deployed by VPLMN#4 at the location of the terminal device and the requested NSSAI There is a mapping relationship, so HPLMN NSSF can exclude VPLMN#4 and determine candidate VPLMN from VPLMN#1, VPLMN#2, and VPLMN#3.
上述示例结合图4描述了存在VPLMN#1可以在终端设备的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的所有HPLMN S-NSSAI具有映射关系的切片的情况，即对应上文中描述的情况1。The above example combined with Figure 4 describes the situation where VPLMN#1 can support all HPLMN S-NSSAI slices with mapping relationships (mapping of Requested NSSAI) at the location of the terminal device, which corresponds to the above Describe the situation 1.
示例性地，若与HPLMN NSSF交互的其他VPLMN中不包括VPLMN#1，仅包括VPLMN#2和VPLMN#3，那么基于上文中描述的情况2可知，HPLMN NSSF可以确定VPLMN#2和VPLMN#3为候选VPLMN，VPLMN#2和VPLMN#3在终端设备的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的部分HPLMN S- NSSAI具有映射关系的切片。For example, if the other VPLMNs interacting with the HPLMN NSSF do not include VPLMN#1, but only include VPLMN#2 and VPLMN#3, then based on the situation 2 described above, the HPLMN NSSF can determine VPLMN#2 and VPLMN#3 For candidate VPLMN, VPLMN#2 and VPLMN#3 support the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device. The partial HPLMN S- NSSAI has slices with mapping relationships.
下面首先结合图6对针对情况1的网络选择方法进行描述。The network selection method for case 1 is first described below with reference to Figure 6 .
图6是本申请实施例提供的一种网络选择方法600的示意图，方法600可以应用于如图2或图3所示的网络架构，方法600可以包括S601至S607，其中的S601至S604与上述步骤S501至S504类似，以情况1中所描述的HPLMN NSSF从候选VPLMN中确定第二VPLMN为例，该第二VPLMN在终端设备的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的所有HPLMN S-NSSAI具有映射关系的切片。关于S601至S604的相关内容可参看S501至S504中的相关说明，此处不再赘述。下面对S605至S607进行介绍：Figure 6 is a schematic diagram of a network selection method 600 provided by an embodiment of the present application. The method 600 can be applied to the network architecture shown in Figure 2 or Figure 3. The method 600 can include S601 to S607, where S601 to S604 are the same as the above. Steps S501 to S504 are similar. Taking the HPLMN NSSF described in case 1 to determine the second VPLMN from the candidate VPLMN as an example, the second VPLMN supports the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device, including All HPLMN S-NSSAI slices have mapping relationships. For the relevant contents of S601 to S604, please refer to the relevant descriptions in S501 to S504 and will not be repeated here. The following is an introduction to S605 to S607:
S605，HPLMN NSSF向HPLMN UDM发送第二VPLMN的信息，该第二VPLMN支持的切片包括与请求的NSSAI的映射关系(mapping of Requested NSSAI)具有映射关系的切片。相应地，HPLMN UDM接收该第二VPLMN的信息。S605, HPLMN NSSF sends the information of the second VPLMN to HPLMN UDM. The slices supported by the second VPLMN include slices that have a mapping relationship with the requested NSSAI (mapping of Requested NSSAI). Correspondingly, the HPLMN UDM receives the information of the second VPLMN.
在本步骤中，HPLMN NSSF在确定第二VPLMN的情况下，HPLMN NSSF向HPLMN UDM发送第二VPLMN的信息，该第二VPLMN的信息可以触发HPLMN UDM将第二VPLMN的选网优先级进行调整，调整后的第二VPLMN的选网优先级高于第一VPLMN的选网优先级。In this step, when the HPLMN NSSF determines the second VPLMN, the HPLMN NSSF sends the information of the second VPLMN to the HPLMN UDM. The information of the second VPLMN can trigger the HPLMN UDM to adjust the network selection priority of the second VPLMN. The adjusted network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
示例性地，第二VPLMN的信息可以包括第二VPLMN的标识。For example, the information of the second VPLMN may include the identification of the second VPLMN.
举例说明，结合上面描述的示例，终端设备在第一VPLMN请求的NSSAI(Requested NSSAI)包括VPLMN S-NSSAI-1、VPLMN S-NSSAI-2和VPLMN S-NSSAI-3，第一VPLMN在终端设备所在的位置支持VPLMN S-NSSAI-1和VPLMN S-NSSAI-2，不支持VPLMN S-NSSAI-3。示例性地，HPLMN NSSF确定表4中的VPLMN#1为第二VPLMN，HPLMN NSSF向HPLMN UDM发送VPLMN#1的信息。For example, based on the example described above, the NSSAI (Requested NSSAI) requested by the terminal device at the first VPLMN includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3. The first VPLMN is at the terminal device. The location supports VPLMN S-NSSAI-1 and VPLMN S-NSSAI-2, but does not support VPLMN S-NSSAI-3. For example, the HPLMN NSSF determines that VPLMN#1 in Table 4 is the second VPLMN, and the HPLMN NSSF sends the information of VPLMN#1 to the HPLMN UDM.
S606，HPLMN UDM向第一VPLMN AMF发送第二VPLMN的选网优先级，第二VPLMN的选网优先级高于第一VPLMN的选网优先级。相应地，第一VPLMN AMF接收第二VPLMN的选网优先级。S606. The HPLMN UDM sends the network selection priority of the second VPLMN to the first VPLMN AMF. The network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN. Correspondingly, the first VPLMN AMF receives the network selection priority of the second VPLMN.
可选地，在S606之前，方法600还包括：第一VPLMN AMF向HPLMN UDM发送第一指示信息，该第一指示信息用于指示HPLMN UDM更新PLMN选网优先级。S606包括：HPLMN UDM向第一VPLMN AMF发送更新后的PLMN选网优先级，更新后的PLMN选网优先级用于指示第二VPLMN的选网优先级高于第一VPLMN的选网优先级。Optionally, before S606, method 600 also includes: the first VPLMN AMF sending first indication information to the HPLMN UDM, the first indication information being used to instruct the HPLMN UDM to update the PLMN network selection priority. S606 includes: the HPLMN UDM sends the updated PLMN network selection priority to the first VPLMN AMF. The updated PLMN network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
可选地，HPLMN UDM可以通过SOR信息携带第二VPLMN的选网优先级。Optionally, the HPLMN UDM can carry the network selection priority of the second VPLMN through SOR information.
可选地，第一VPLMN AMF在确定不支持请求的NSSAI(Requested NSSAI)中的至少一个的情况下，第一VPLMN AMF可以向HPLMN UDM发送第一指示信息，指示HPLMN UDM需要调整PLMN选网优先级。Optionally, when the first VPLMN AMF determines that at least one of the requested NSSAIs (Requested NSSAI) is not supported, the first VPLMN AMF may send the first indication information to the HPLMN UDM, indicating that the HPLMN UDM needs to adjust the PLMN network selection priority. class.
举例说明，结合上面描述的示例，HPLMN UDM接收到VPLMN#1的信息之后，调整VPLMN#1的选网优先级高于第一VPLMN的选网优先级，之后HPLMN UDM可以通过SOR信息，将携带VPLMN#1的选网优先级的SOR信息发送给第一VPLMN AMF。示例性地，HPLMN UDM以优先级列表的形式向第一VPLMN AMF发送VPLMN#1的选网优先级，该优先级列表中还包括更新后的第一VPLMN的选网优先级。For example, based on the example described above, after HPLMN UDM receives the information of VPLMN#1, it adjusts the network selection priority of VPLMN#1 to be higher than the network selection priority of the first VPLMN. After that, HPLMN UDM can pass the SOR information to carry the The SOR information of the network selection priority of VPLMN#1 is sent to the first VPLMN AMF. For example, the HPLMN UDM sends the network selection priority of VPLMN#1 to the first VPLMN AMF in the form of a priority list, and the priority list also includes the updated network selection priority of the first VPLMN.
S607，第一VPLMN AMF向终端设备发送第二VPLMN的选网优先级。相应地，终 端设备接收第二VPLMN的选网优先级。S607: The first VPLMN AMF sends the network selection priority of the second VPLMN to the terminal device. Correspondingly, eventually The end device receives the network selection priority of the second VPLMN.
应理解，第一VPLMN AMF向终端设备发送的是更新后的第二VPLMN的选网优先级。It should be understood that what the first VPLMN AMF sends to the terminal device is the updated network selection priority of the second VPLMN.
在本步骤中，作为一种实现方式，第一VPLMN AMF可以向终端设备发送第四消息，第四消息为第一消息的响应消息，第四消息可以包括第二VPLMN的选网优先级。In this step, as an implementation manner, the first VPLMN AMF may send a fourth message to the terminal device. The fourth message is a response message to the first message, and the fourth message may include the network selection priority of the second VPLMN.
示例性地，第四消息为注册接受消息。For example, the fourth message is a registration acceptance message.
可选地，第四消息还可以指示第一VPLMN在请求的NSSAI(Requested NSSAI)中支持的S-NSSAI，即允许的NSSAI(Allowed NSSAI)，以及第一VPLMN在请求的NSSAI(Requested NSSAI)中不支持的S-NSSAI，即拒绝的NSSAI(Rejected NSSAI)。Optionally, the fourth message may also indicate the S-NSSAI supported by the first VPLMN in the requested NSSAI (Requested NSSAI), that is, the allowed NSSAI (allowed NSSAI), and the first VPLMN in the requested NSSAI (Requested NSSAI). Unsupported S-NSSAI, that is, rejected NSSAI (Rejected NSSAI).
举例说明，结合上面描述的示例，终端设备在第一VPLMN请求的NSSAI(Requested NSSAI)包括VPLMN S-NSSAI-1、VPLMN S-NSSAI-2和VPLMN S-NSSAI-3，第一VPLMN在终端设备所在的位置支持VPLMN S-NSSAI-1和VPLMN S-NSSAI-2，不支持VPLMN S-NSSAI-3。即，允许的NSSAI(Allowed NSSAI)包括：VPLMN S-NSSAI-1和VPLMN S-NSSAI-2，拒绝的NSSAI(Rejected NSSAI)包括VPLMN S-NSSAI-3。For example, based on the example described above, the NSSAI (Requested NSSAI) requested by the terminal device at the first VPLMN includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3. The first VPLMN is at the terminal device. The location supports VPLMN S-NSSAI-1 and VPLMN S-NSSAI-2, but does not support VPLMN S-NSSAI-3. That is, the allowed NSSAI (Allowed NSSAI) includes: VPLMN S-NSSAI-1 and VPLMN S-NSSAI-2, and the rejected NSSAI (Rejected NSSAI) includes VPLMN S-NSSAI-3.
在本申请实施例中，HPLMN NSSF可以为终端设备选择第二VPLMN，第二VPLMN在终端设备的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的所有HPLMN S-NSSAI具有映射关系的切片，之后HPLMN NSSF向HPLMN UDM发送第二VPLMN的信息，由HPLMN UDM将第二VPLMN的选网优先级调整至高于第一VPLMN的选网优先级，之后再通过第一VPLMN AMF将第二VPLMN的选网优先级发送给终端设备，终端设备可以根据更新后的PLMN选网优先级的顺序选择接入第二VPLMN。这样可以在更大程度上满足终端设备的请求，提升终端设备的使用体验。In the embodiment of this application, the HPLMN NSSF can select the second VPLMN for the terminal device. The second VPLMN supports the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device. All HPLMN S-NSSAI included in the terminal device have a mapping relationship. slice, then HPLMN NSSF sends the information of the second VPLMN to HPLMN UDM, and HPLMN UDM adjusts the network selection priority of the second VPLMN to be higher than the network selection priority of the first VPLMN, and then uses the first VPLMN AMF to adjust the network selection priority of the second VPLMN. The network selection priority of the VPLMN is sent to the terminal device, and the terminal device can choose to access the second VPLMN according to the order of the updated PLMN network selection priority. In this way, the requests of the terminal device can be satisfied to a greater extent and the user experience of the terminal device can be improved.
应理解，HPLMN NSSF可以从候选VPLMN中确定第二VPLMN，本申请实施例中的第二VPLMN的数量可以为一个或多个。若第二VPLMN的数量为一个，可以理解为：It should be understood that the HPLMN NSSF can determine the second VPLMN from the candidate VPLMN, and the number of the second VPLMN in the embodiment of the present application can be one or more. If the number of the second VPLMN is one, it can be understood as:
其一：在S504中，HPLMN NSSF确定的候选VPLMN的数量为一个，该候选VPLMN在终端设备所在的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的所有HPLMN S-NSSAI具有映射关系的切片。或者，One: In S504, the number of candidate VPLMNs determined by the HPLMN NSSF is one, and all HPLMN S-NSSAIs contained in the mapping relationship (mapping of Requested NSSAI) supported by the candidate VPLMN at the location of the terminal device have Slices of mapping relationships. or,
其二：HPLMN NSSF确定的候选VPLMN的数量为多个，这多个候选VPLMN在终端设备所在的位置均支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的所有HPLMN S-NSSAI具有映射关系的切片。HPLMN NSSF可以从这多个候选VPLMN中任意确定一个作为第二VPLMN。Second: The number of candidate VPLMNs determined by HPLMN NSSF is multiple. These multiple candidate VPLMNs support the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device. All HPLMN S-NSSAIs contained in it have Slices of mapping relationships. The HPLMN NSSF can randomly determine one of these candidate VPLMNs as the second VPLMN.
若第二VPLMN的数量为多个，可以理解为：HPLMN NSSF确定的候选VPLMN的数量为多个，这多个候选VPLMN在终端设备所在的位置均支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的所有HPLMN S-NSSAI具有映射关系的切片。HPLMN NSSF可以将这多个候选VPLMN确定为第二VPLMN，由终端设备在多个第二VPLMN中选择接入一个，即也可以参考后面图7所示的方法。If the number of second VPLMNs is multiple, it can be understood as: the number of candidate VPLMNs determined by HPLMN NSSF is multiple, and these multiple candidate VPLMNs support the mapping relationship (mapping of Requested) with the requested NSSAI at the location of the terminal device. NSSAI) contains all HPLMN S-NSSAI slices with mapping relationships. The HPLMN NSSF can determine these multiple candidate VPLMNs as the second VPLMN, and the terminal device can select one of the multiple second VPLMNs to access. That is, you can also refer to the method shown in Figure 7 below.
此外，除了第二VPLMN在终端设备所在的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的所有HPLMN S-NSSAI具有映射关系的切片之外，若HPLMN NSSF判断出存在一个VPLMN，其支持的与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的HPLMN S-NSSAI具有映射关系的切片比当前 VPLMN要多，即便只是部分的切片不是全部的切片，由于不存在其他更优的VPLMN，也可以将这个VPLMN直接确定为上述第二VPLMN。In addition, in addition to the second VPLMN supporting all HPLMN S-NSSAI slices with mapping relationships contained in the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device, if the HPLMN NSSF determines that there is a VPLMN , the slices that the HPLMN S-NSSAI included in the mapping of Requested NSSAI supported by it have a mapping relationship are larger than the current ones. There are more VPLMNs. Even if only some slices are not all slices, since there is no other better VPLMN, this VPLMN can be directly determined as the above-mentioned second VPLMN.
以上结合图6介绍了基于情况1的网络选择方法，但是，有可能如上文描述的情况2所示，HPLMN NSSF找到的候选VPLMN支持的切片和与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的部分HPLMN S-NSSAI具有映射关系。下面结合图7对基于情况2的网络选择方法进行介绍。The network selection method based on case 1 is introduced above in conjunction with Figure 6. However, it is possible that, as shown in case 2 described above, the slices supported by the candidate VPLMN found by HPLMN NSSF and the mapping relationship with the requested NSSAI (mapping of Requested NSSAI) The included part HPLMN S-NSSAI has a mapping relationship. The network selection method based on case 2 is introduced below with reference to Figure 7.
图7是本申请实施例提供的再一种网络选择方法700的示意性流程图，方法700可以包括S701至S714，其中的S701至S704与上述S501至S504类似，在S704中将候选VPLMN称为至少一个候选VPLMN，该至少一个候选VPLMN中的每个候选VPLMN在终端设备的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的部分HPLMN S-NSSAI具有映射关系的切片。关于S701至S704的相关内容可参看S501至S504中的相关说明，此处不再赘述。下面对S705至S714进行介绍：Figure 7 is a schematic flowchart of yet another network selection method 700 provided by an embodiment of the present application. The method 700 may include S701 to S714, where S701 to S704 are similar to the above S501 to S504. In S704, the candidate VPLMN is called At least one candidate VPLMN, each candidate VPLMN in the at least one candidate VPLMN supports, at the location of the terminal device, a slice that has a mapping relationship with a portion of the HPLMN S-NSSAI contained in the mapping relationship (mapping of Requested NSSAI). For the relevant contents of S701 to S704, please refer to the relevant descriptions in S501 to S504, which will not be described again here. The following is an introduction to S705 to S714:
S705，HPLMN NSSF向HPLMN UDM发送至少一个候选VPLMN的信息以及与该至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN切片。相应地，HPLMN UDM接收该至少一个候选VPLMN的信息以及与该至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN切片。S705, the HPLMN NSSF sends the information of at least one candidate VPLMN and the HPLMN slice that has a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN to the HPLMN UDM. Correspondingly, the HPLMN UDM receives the information of the at least one candidate VPLMN and the HPLMN slices that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN.
其中，与每个候选VPLMN支持的切片具有映射关系的HPLMN切片属于请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的HPLMN S-NSSAI所标识的切片。Among them, the HPLMN slices that have a mapping relationship with the slices supported by each candidate VPLMN belong to the slices identified by the HPLMN S-NSSAI included in the mapping of the requested NSSAI (mapping of Requested NSSAI).
举例说明，终端设备在第一VPLMN中请求的NSSAI(Requested NSSAI)包括VPLMN S-NSSAI-1、VPLMN S-NSSAI-2和VPLMN S-NSSAI-3，其中，VPLMN S-NSSAI-1、VPLMN S-NSSAI-2和VPLMN S-NSSAI-3与HPLMN S-NSSAI的映射关系如表1所示。For example, the NSSAI (Requested NSSAI) requested by the terminal device in the first VPLMN includes VPLMN S-NSSAI-1, VPLMN S-NSSAI-2 and VPLMN S-NSSAI-3, among which, VPLMN S-NSSAI-1, VPLMN S -The mapping relationship between NSSAI-2 and VPLMN S-NSSAI-3 and HPLMN S-NSSAI is shown in Table 1.
候选VPLMN包括候选VPLMN#1、候选VPLMN#2以及候选VPLMN#3。其中，候选VPLMN支持的S-NSSAI以及候选VPLMN S-NSSAI和HPLMN S-NSSAI之间的映射关系如表3所示。The candidate VPLMN includes candidate VPLMN#1, candidate VPLMN#2, and candidate VPLMN#3. Among them, the S-NSSAI supported by candidate VPLMN and the mapping relationship between candidate VPLMN S-NSSAI and HPLMN S-NSSAI are shown in Table 3.
HPLMN NSSF向HPLMN UDM发送的与每个候选VPLMN支持的切片具有映射关系的HPLMN的切片包括：与候选VPLMN#1支持的切片具有映射关系的HPLMN S-NSSAI-A和HPLMN S-NSSAI-C、与候选VPLMN#2支持的切片具有映射关系的HPLMN S-NSSAI-B和HPLMN S-NSSAI-C以及与候选VPLMN#3支持的切片具有映射关系的HPLMN S-NSSAI-A和HPLMN S-NSSAI-B。HPLMN NSSF向HPLMN UDM发送该至少一个候选VPLMN的信息，即发送候选VPLMN#1、候选VPLMN#2和候选VPLMN#3的信息，示例性地，可以发送候选VPLMN#1、候选VPLMN#2和候选VPLMN#3的标识。The HPLMN slices sent by HPLMN NSSF to HPLMN UDM that have a mapping relationship with the slices supported by each candidate VPLMN include: HPLMN S-NSSAI-A and HPLMN S-NSSAI-C that have a mapping relationship with the slices supported by candidate VPLMN#1, HPLMN S-NSSAI-B and HPLMN S-NSSAI-C that have a mapping relationship with slices supported by candidate VPLMN#2 and HPLMN S-NSSAI-A and HPLMN S-NSSAI-C that have a mapping relationship with slices supported by candidate VPLMN#3 B. The HPLMN NSSF sends the information of the at least one candidate VPLMN to the HPLMN UDM, that is, sends the information of the candidate VPLMN#1, the candidate VPLMN#2, and the candidate VPLMN#3. For example, the candidate VPLMN#1, the candidate VPLMN#2, and the candidate VPLMN#3 can be sent. Identification of VPLMN#3.
S706，HPLMN UDM向第一VPLMN AMF发送该至少一个候选VPLMN的信息以及与该至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN切片。相应地，第一VPLMN AMF接收该至少一个候选VPLMN的信息以及与该至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN切片。S706. The HPLMN UDM sends the information of the at least one candidate VPLMN and the HPLMN slices that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN to the first VPLMN AMF. Correspondingly, the first VPLMN AMF receives the information of the at least one candidate VPLMN and the HPLMN slices that have a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN.
具体示例可参见在S705中的描述，此处不再赘述。For specific examples, please refer to the description in S705, which will not be described again here.
S707，第一VPLMN AMF向终端设备发送该至少一个候选VPLMN的信息以及与该至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN切片。相 应地，终端设备接收该至少一个候选VPLMN的信息以及与该至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN切片。S707: The first VPLMN AMF sends the information of the at least one candidate VPLMN and the HPLMN slice that has a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN to the terminal device. Mutually Accordingly, the terminal device receives the information of the at least one candidate VPLMN and the HPLMN slice that has a mapping relationship with the slices supported by each candidate VPLMN in the at least one candidate VPLMN.
具体示例可参见在S705中的描述，此处不再赘述。For specific examples, please refer to the description in S705, which will not be described again here.
在本步骤中，作为一种实现方式，第一VPLMN AMF可以向终端设备发送第五消息，第五消息为第一消息的响应消息，第五消息可以包括该至少一个候选VPLMN的信息以及该至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的HPLMN切片。In this step, as an implementation manner, the first VPLMN AMF may send a fifth message to the terminal device. The fifth message is a response message to the first message. The fifth message may include the information of the at least one candidate VPLMN and the at least one candidate VPLMN. Each slice supported by the candidate VPLMN in a candidate VPLMN has an HPLMN slice with a mapping relationship.
示例性地，第五消息为注册接受(registration sccept)消息。Illustratively, the fifth message is a registration acceptance (registration sccept) message.
可选地，第五消息还可以指示第一VPLMN在请求的NSSAI(Requested NSSAI)中支持的S-NSSAI，即允许的NSSAI(Allowed NSSAI)，以及第一VPLMN在请求的NSSAI(Requested NSSAI)中不支持的S-NSSAI，即拒绝的NSSAI(Rejected NSSAI)。Optionally, the fifth message may also indicate the S-NSSAI supported by the first VPLMN in the requested NSSAI (Requested NSSAI), that is, the allowed NSSAI (allowed NSSAI), and the first VPLMN in the requested NSSAI (Requested NSSAI). Unsupported S-NSSAI, that is, rejected NSSAI (Rejected NSSAI).
S708，终端设备从该至少一个候选VPLMN中确定第二VPLMN。S708: The terminal device determines a second VPLMN from the at least one candidate VPLMN.
作为一种可能的实现方式，终端设备根据用户的业务需求，从该至少一个候选VPLMN中确定第二VPLMN。在该至少一个候选VPLMN中的每个候选VPLMN支持终端设备请求接入的部分切片的情况下，终端设备可以根据用户的业务需求来确定第二VPLMN。As a possible implementation manner, the terminal device determines the second VPLMN from the at least one candidate VPLMN according to the user's service requirements. In the case where each candidate VPLMN in the at least one candidate VPLMN supports the partial slice requested by the terminal device for access, the terminal device may determine the second VPLMN according to the user's service requirements.
举例说明，结合S705中描述的示例，终端设备接收到候选VPLMN#1、候选VPLMN#2以及候选VPLMN#3的信息以及与候选VPLMN#1、候选VPLMN#2和候选VPLMN#3支持的切片具有映射关系的HPLMN切片，并从候选VPLMN#1、候选VPLMN#2以及候选VPLMN#3中确定第二VPLMN。以终端设备更期望访问HPLMN NSSAI-A和HPLMN NSSAI-C的业务为例，终端设备确定与候选VPLMN#1支持的切片具有映射关系的HPLMN切片包括HPLMN S-NSSAI-A和HPLMN S-NSSAI-C，因此，终端设备可以确定候选VPLMN#1为第二VPLMN。For example, combined with the example described in S705, the terminal device receives information about the candidate VPLMN#1, the candidate VPLMN#2, and the candidate VPLMN#3 and the slices supported by the candidate VPLMN#1, the candidate VPLMN#2, and the candidate VPLMN#3. HPLMN slices of the mapping relationship, and determine the second VPLMN from candidate VPLMN#1, candidate VPLMN#2, and candidate VPLMN#3. Taking the service that the terminal device prefers to access HPLMN NSSAI-A and HPLMN NSSAI-C as an example, the terminal device determines that the HPLMN slices that have a mapping relationship with the slices supported by candidate VPLMN#1 include HPLMN S-NSSAI-A and HPLMN S-NSSAI- C. Therefore, the terminal device can determine candidate VPLMN#1 as the second VPLMN.
在一种可能的场景下，本申请实施例中确定的第二VPLMN可能为第一VPLMN，在这种情况下，可选地，终端设备确定该第二VPLMN和第一VPLMN为同一个VPLMN，终端设备继续驻留在第一VPLMN，无需请求更改选网优先级。In a possible scenario, the second VPLMN determined in the embodiment of this application may be the first VPLMN. In this case, optionally, the terminal device determines that the second VPLMN and the first VPLMN are the same VPLMN, The terminal device continues to reside in the first VPLMN without requesting a change in network selection priority.
S709，终端设备向第一VPLMN AMF发送第二VPLMN的信息，以请求HPLMN UDM更新第二VPLMN的选网优先级。相应地，第一VPLMN AMF接收该第二VPLMN的信息。S709: The terminal device sends the information of the second VPLMN to the first VPLMN AMF to request the HPLMN UDM to update the network selection priority of the second VPLMN. Correspondingly, the first VPLMN AMF receives the information of the second VPLMN.
可选地，终端设备通过注册完成(registration complete)消息携带第二VPLMN的信息并向第一VPLMN AMF发送注册完成消息。Optionally, the terminal device carries the information of the second VPLMN through a registration complete message and sends the registration complete message to the first VPLMN AMF.
示例性地，第二VPLMN的信息包括第二VPLMN的标识，第二VPLMN的标识可以指示HPLMN UDM调整第二VPLMN的选网优先级高于第一VPLMN的选网优先级。For example, the information of the second VPLMN includes the identifier of the second VPLMN, and the identifier of the second VPLMN may instruct the HPLMN UDM to adjust the network selection priority of the second VPLMN to be higher than the network selection priority of the first VPLMN.
S710，第一VPLMN AMF向HPLMN UDM发送第二VPLMN的信息，以请求更新第二VPLMN的选网优先级。相应地，HPLMN UDM接收该第二VPLMN的信息。S710, the first VPLMN AMF sends the information of the second VPLMN to the HPLMN UDM to request to update the network selection priority of the second VPLMN. Correspondingly, the HPLMN UDM receives the information of the second VPLMN.
应理解，本申请实施例中的第二VPLMN不同于图6所描述的实施例中的第二VPLMN，本申请实施例中的第二VPLMN在终端设备的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)包含的部分HPLMN S-NSSAI具有映射关系的切片，并且本申请实施例中的第二VPLMN是由终端设备从该至少一个候选VPLMN中确定的。It should be understood that the second VPLMN in the embodiment of the present application is different from the second VPLMN in the embodiment described in Figure 6. The second VPLMN in the embodiment of the present application supports the mapping relationship with the requested NSSAI at the location of the terminal device ( Part of the HPLMN S-NSSAI included in mapping of Requested NSSAI has slices of mapping relationships, and the second VPLMN in the embodiment of this application is determined by the terminal device from the at least one candidate VPLMN.
在本申请实施例中，HPLMN NSSF可以确定至少一个候选VPLMN，该至少一个候选VPLMN中每个候选VPLMN在终端设备的位置支持的切片与请求的NSSAI的映射关系 (mapping of Requested NSSAI)包含的部分HPLMN S-NSSAI具有映射关系。在这种情况下，HPLMN NSSF可以将该至少一个候选VPLMN中每个候选VPLMN在终端设备的位置支持的切片具有映射关系的HPLMN切片发送至终端设备。终端设备从该至少一个候选VPLMN中确定第二VPLMN，并请求HPLMN UDM更新第二VPLMN的选网优先级，该第二VPLMN为终端设备期望接入的VPLMN。这样，网络可以尽量满足终端设备的需求，使得终端设备在第二VPLMN中接入期望请求的切片。In this embodiment of the present application, the HPLMN NSSF can determine at least one candidate VPLMN, and the mapping relationship between the slices supported by each candidate VPLMN at the location of the terminal device and the requested NSSAI in the at least one candidate VPLMN. (mapping of Requested NSSAI) contains some HPLMN S-NSSAI that have mapping relationships. In this case, the HPLMN NSSF may send to the terminal device an HPLMN slice that has a mapping relationship with the slices supported by each candidate VPLMN at the location of the terminal device in the at least one candidate VPLMN. The terminal device determines a second VPLMN from the at least one candidate VPLMN, and requests the HPLMN UDM to update the network selection priority of the second VPLMN. The second VPLMN is the VPLMN that the terminal device desires to access. In this way, the network can try its best to meet the needs of the terminal device, so that the terminal device can access the desired requested slice in the second VPLMN.
可选地，在S710之前，方法700包括S711：第一VPLMN AMF向HPLMN UDM发送第一指示信息，第一指示信息用于指示HPLMN UDM更新选网优先级。Optionally, before S710, method 700 includes S711: the first VPLMN AMF sends first indication information to the HPLMN UDM, and the first indication information is used to instruct the HPLMN UDM to update the network selection priority.
应理解，第一VPLMN不支持终端设备请求接入的切片中的至少一个，即第一VPLMN不支持请求的NSSAI(Requested NSSAI)中的至少一个S-NSSAI为触发第一VPLMN发送第一指示信息的条件。反之，如果第一VPLMN支持终端设备请求接入的全部切片，即支持请求的NSSAI(Requested NSSAI)的全集，那么第一VPLMN AMF可以根据第一消息接受终端设备的接入请求，不再指示HPLMN重新选择其他的VPLMN。It should be understood that the first VPLMN does not support at least one of the slices requested by the terminal device to access, that is, the first VPLMN does not support at least one of the requested NSSAI (Requested NSSAI) S-NSSAI to trigger the first VPLMN to send the first indication information. conditions of. On the contrary, if the first VPLMN supports all slices requested by the terminal device for access, that is, supports the full set of requested NSSAI (Requested NSSAI), then the first VPLMN AMF can accept the access request of the terminal device according to the first message and no longer instruct the HPLMN Select another VPLMN again.
还应理解，HPLMN UDM负责确定至少一个候选VPLMN的选网优先级，在漫游场景下，终端设备可以优先考虑接入选网优先级高的候选VPLLMN。在本申请实施例中，第一VPLMN AMF可以通过第一指示信息指示HPLMN UDM更新选网优先级，为第二VPLMN配置高于第一VPLMN的选网优先级，这样终端设备可以根据更新后的选网优先级优先接入第二VPLMN。It should also be understood that the HPLMN UDM is responsible for determining the network selection priority of at least one candidate VPLMN. In a roaming scenario, the terminal device can give priority to access the candidate VPLLMN with a high network selection priority. In the embodiment of this application, the first VPLMN AMF can instruct the HPLMN UDM to update the network selection priority through the first indication information, and configure the second VPLMN with a higher network selection priority than the first VPLMN, so that the terminal device can according to the updated network selection priority. Select the network priority to access the second VPLMN first.
其中，第一VPLMN AMF可以将第一指示信息、终端设备的位置信息以及请求的NSSAI的映射关系(mapping of Requested NSSAI)封装在同一个消息中发送给HPLMN UDM，也可以将第一指示信息作为单独的消息发送给HPLMN UDM，本申请实施例对此不作限定。Among them, the first VPLMN AMF can encapsulate the mapping relationship (mapping of Requested NSSAI) of the first indication information, the terminal device's location information, and the requested NSSAI in the same message and send it to the HPLMN UDM, or it can also use the first indication information as A separate message is sent to HPLMN UDM, which is not limited in the embodiment of this application.
示例性地，第一VPLMN AMF可以先将终端设备的位置信息和请求的NSSAI的映射关系(mapping of Requested NSSAI)发送给HPLMN UDM，然后单独通过其他消息将第一指示信息发送给HPLMN UDM。For example, the first VPLMN AMF may first send the mapping relationship (mapping of Requested NSSAI) between the terminal device's location information and the requested NSSAI to the HPLMN UDM, and then send the first indication information to the HPLMN UDM through other messages alone.
可选地，方法700还可以包括S712：HPLMN UDM向第一VPLMN AMF发送第二VPLMN的选网优先级，该第二VPLMN的选网优先级高于第一VPLMN的选网优先级。相应地，第一VPLMN AMF接收该第二VPLMN的选网优先级。Optionally, method 700 may also include S712: HPLMN UDM sends the network selection priority of the second VPLMN to the first VPLMN AMF, and the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN. Correspondingly, the first VPLMN AMF receives the network selection priority of the second VPLMN.
可选地，HPLMN UDM在接收到第二VPLMN的信息和第一指示信息之后，可以调整第二VPLMN的选网优先级高于第一VPLMN的选网优先级，在调整之后，将调整后的第二VPLMN的选网优先级发送给第一VPLMN AMF。因此，在S712中，HPLMN UDM向第一VPLMN AMF发送的是更新后的第二VPLMN的选网优先级。Optionally, after receiving the information of the second VPLMN and the first indication information, the HPLMN UDM can adjust the network selection priority of the second VPLMN to be higher than the network selection priority of the first VPLMN. After the adjustment, the adjusted The network selection priority of the second VPLMN is sent to the first VPLMN AMF. Therefore, in S712, what the HPLMN UDM sends to the first VPLMN AMF is the updated network selection priority of the second VPLMN.
在一种可能的实现方式中，HPLMN UDM可以通过SOR信息携带调整后的选网优先级发送给第一VPLMN AMF。In a possible implementation, the HPLMN UDM can carry the adjusted network selection priority and send it to the first VPLMN AMF through the SOR message.
可选地，在S710之后，方法700还包括S713：第一VPLMN AMF向终端设备发送第三消息，该第三消息携带第二VPLMN的选网优先级，第二VPLMN的选网优先级为更新后的选网优先级。相应地，终端设备接收该第三消息。Optionally, after S710, method 700 also includes S713: the first VPLMN AMF sends a third message to the terminal device, the third message carries the network selection priority of the second VPLMN, and the network selection priority of the second VPLMN is updated. The subsequent network selection priority. Correspondingly, the terminal device receives the third message.
终端设备在接收到第三消息之后，在当前的位置搜索VPLMN，并根据更新后的选网优先级确定第二VPLMN的选网优先级高于第一VPLMN的选网优先级，因此终端设备可 以按照选网优先级的指示重新入网。After receiving the third message, the terminal device searches for the VPLMN at the current location, and determines based on the updated network selection priority that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN, so the terminal device can To re-enter the network according to the instructions of network selection priority.
在一种可能的实现方式中，第三消息为DL NAS传输消息，第三消息包括SOR信息，SOR信息中携带第二VPLMN的选网优先级。In a possible implementation manner, the third message is a DL NAS transmission message, and the third message includes SOR information, and the SOR information carries the network selection priority of the second VPLMN.
可选地，终端设备在确定第二VPLMN的选网优先级高于第一VPLMN的选网优先级之后，终端设备可以选择从第一VPLMN去注册，注册接入第二VPLMN。Optionally, after the terminal device determines that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN, the terminal device may choose to register from the first VPLMN and register to access the second VPLMN.
上文结合图7介绍了基于情况2的网络选择方法，其中，可以由HPLMN NSSF通过HPLMN UDM以及第一VPLMN将该至少一个候选VPLMN的信息发送给终端设备，由终端设备从该至少一个候选VPLMN中确定第二VPLMN，并请求HPLMN UDM更新第二VPLMN的选网优先级。然而，该至少一个候选VPLMN无法满足终端设备的期望，即无法找到一个可以在终端设备的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的全部HPLMN S-NSSAI具有映射关系的切片的VPLMN。基于此，下面结合图8对基于情况2的另一种网络选择方法进行介绍。The network selection method based on situation 2 is introduced above in conjunction with Figure 7, in which the HPLMN NSSF can send the information of the at least one candidate VPLMN to the terminal device through the HPLMN UDM and the first VPLMN, and the terminal device can select the at least one candidate VPLMN from the Determine the second VPLMN and request the HPLMN UDM to update the network selection priority of the second VPLMN. However, the at least one candidate VPLMN cannot meet the expectations of the terminal device, that is, it cannot find one that can support all HPLMN S-NSSAIs contained in the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device. Sliced VPLMN. Based on this, another network selection method based on case 2 is introduced below with reference to Figure 8 .
图8是本申请实施例提供的又一种网络选择方法800的示意性流程图，方法800可以包括S801至S808，其中的S801至S804与上述S501至S504类似，在S804中将候选VPLMN称为至少一个候选VPLMN，该至少一个候选VPLMN中的每个候选VPLMN在终端设备的位置支持与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的部分HPLMN S-NSSAI具有映射关系的切片。关于S801至S804的相关内容可参看S501至S504中的相关说明，此处不再赘述。下面对S805至S808进行介绍：Figure 8 is a schematic flow chart of yet another network selection method 800 provided by an embodiment of the present application. The method 800 may include S801 to S808, where S801 to S804 are similar to the above S501 to S504. In S804, the candidate VPLMN is called At least one candidate VPLMN, each candidate VPLMN in the at least one candidate VPLMN supports a slice having a mapping relationship with a portion of the HPLMN S-NSSAI included in the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI at the location of the terminal device. For the relevant contents of S801 to S804, please refer to the relevant descriptions in S501 to S504, and will not be repeated here. The following is an introduction to S805 to S808:
S805，HPLMN NSSF向HPLMN UDM发送第三指示信息，该第三指示信息用于指示未找到可以支持终端设备请求接入的全部切片的其他VPLMN。相应地，HPLMN UDM接收该第三指示信息。S805, HPLMN NSSF sends third indication information to HPLMN UDM. The third indication information is used to indicate that no other VPLMN that can support all slices requested by the terminal device to access is found. Correspondingly, HPLMN UDM receives the third indication information.
S806，HPLMN UDM向第一VPLMN AMF发送第三指示信息。相应地，第一VPLMN AMF接收该第三指示信息。S806, HPLMN UDM sends the third instruction information to the first VPLMN AMF. Correspondingly, the first VPLMN AMF receives the third indication information.
在本申请实施例中，HPLMN NSSF如上文中的情况2所述，未寻找到可以支持终端设备请求在第一VPLMN中接入的全部切片的VPLMN。在这种情况下，HPLMN NSSF可以通过HPLMN UDM向第一VPLMN AMF发送第三指示信息，指示寻找失败，这样HPLMN UDM无需调整VPLMN的选网优先级，终端设备可以继续驻留在第一VPLMN中。In this embodiment of the present application, as described in case 2 above, the HPLMN NSSF has not found a VPLMN that can support all the slices that the terminal device requested to access in the first VPLMN. In this case, the HPLMN NSSF can send the third indication message to the first VPLMN AMF through the HPLMN UDM to indicate that the search failed. In this way, the HPLMN UDM does not need to adjust the network selection priority of the VPLMN, and the terminal device can continue to reside in the first VPLMN. .
可选地，在一种可能的实现方式中，方法800还包括S807：第一VPLMN AMF向终端设备发送第三指示信息。相应地，终端设备接收该第三指示信息。Optionally, in a possible implementation, method 800 also includes S807: the first VPLMN AMF sends third indication information to the terminal device. Correspondingly, the terminal device receives the third indication information.
可选地，第一VPLMN AMF可以向终端设备发送第六消息，第六消息为第一消息的响应消息，第六消息可以包括第三指示信息。Optionally, the first VPLMN AMF may send a sixth message to the terminal device, where the sixth message is a response message to the first message, and the sixth message may include third indication information.
示例性地，第六消息为注册接受消息。For example, the sixth message is a registration acceptance message.
可选地，第六消息还可以指示在终端设备请求接入的一个或多个切片中第一VPLMN支持的切片的信息，即允许的NSSAI(allowed NSSAI)，以及在终端设备请求接入的一个或多个切片中第一VPLMN不支持的切片的信息，即拒绝的NSSAI(rejected NSSAI)。其中，终端设备请求接入的一个或多个切片、允许的NSSAI以及拒绝的NSSAI具体可参照图7所描述的实施例中的示例，此处不再赘述。Optionally, the sixth message may also indicate information about the slices supported by the first VPLMN in one or more slices that the terminal device requests access to, that is, allowed NSSAI (allowed NSSAI), and one of the slices that the terminal device requests to access. Or information about the slice that is not supported by the first VPLMN among multiple slices, that is, rejected NSSAI (rejected NSSAI). The details of the one or more slices that the terminal device requests to access, the allowed NSSAI, and the rejected NSSAI may refer to the example in the embodiment described in FIG. 7 , and will not be described again here.
可选地，方法800还包括S808：终端设备基于该第三指示信息，确定继续驻留在第一 VPLMN。Optionally, method 800 also includes S808: based on the third indication information, the terminal device determines to continue to reside on the first VPLMN.
可选地，在另一种可能的实现方式中，若终端设备未向第一VPLMN发送第二指示信息指示若第一VPLMN不支持请求的NSSAI(Requested NSSAI)中的至少一个S-NSSAI，为终端设备寻找支持终端设备请求接入的全部切片的其他VPLMN的信息，那么在S806中第一VPLMN AMF接收第三指示信息之后，第一VPLMN可以选择不向终端设备发送该第三指示信息，即第一VPLMN可以不指示终端设备未寻找到支持终端设备请求的NSSAI(Requested NSSAI)中的全部切片的其他VPLMN。终端设备可以在未接收到第三指示信息的情况下继续驻留在第一VPLMN中。Optionally, in another possible implementation, if the terminal device does not send the second indication information to the first VPLMN indicating that the first VPLMN does not support at least one S-NSSAI in the requested NSSAI (Requested NSSAI), it is The terminal device searches for information about other VPLMNs that support all slices requested by the terminal device to access. Then, after the first VPLMN AMF receives the third indication information in S806, the first VPLMN may choose not to send the third indication information to the terminal device, that is, The first VPLMN may not indicate that the terminal device has not found other VPLMNs that support all slices in the NSSAI (Requested NSSAI) requested by the terminal device. The terminal device may continue to camp in the first VPLMN without receiving the third indication information.
以上结合图8介绍了存在至少一个候选VPLMN在终端设备的位置支持和与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的部分HPLMN S-NSSAI具有映射关系的切片的情况，其中，可以由HPLMN NSSF通过HPLMN UDM以及第一VPLMN向终端设备发送第三指示信息，指示终端设备未寻找到在终端设备的位置支持和与请求的NSSAI的映射关系(mapping of Requested NSSAI)中包含的全部HPLMN S-NSSAI具有映射关系的切片的其他VPLMN。The above combined with Figure 8 introduces the situation where there is at least one candidate VPLMN supported by the location of the terminal device and some HPLMN S-NSSAI slices with mapping relationships included in the mapping relationship with the requested NSSAI (mapping of Requested NSSAI), where, it can be The HPLMN NSSF sends the third indication information to the terminal device through the HPLMN UDM and the first VPLMN, indicating that the terminal device has not found all HPLMN contained in the location support of the terminal device and the mapping relationship (mapping of Requested NSSAI) with the requested NSSAI. S-NSSAI has other VPLMNs of the slices with mapping relationships.
应理解，在上文各实施例中，各网元可以执行各实施例中的部分或全部步骤。这些步骤或操作仅是示例，本申请实施例还可以执行其它操作或者各种操作的变形。此外，各个步骤可以按照各实施例呈现的不同的顺序来执行，并且有可能并非要执行本申请实施例中的全部操作。且，各步骤的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。It should be understood that in each of the above embodiments, each network element may perform some or all of the steps in each embodiment. These steps or operations are only examples, and embodiments of the present application may also perform other operations or variations of various operations. In addition, various steps may be performed in a different order presented in each embodiment, and it is possible that not all operations in the embodiments of the present application are performed. Moreover, the size of the serial number of each step does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.
上文中结合图2至图8，详细描述了根据本申请实施例的网络选择方法，下面将结合图9和图10详细描述根据本申请实施例的网络选择装置。The network selection method according to the embodiment of the present application is described in detail above with reference to FIGS. 2 to 8 . Next, the network selection device according to the embodiment of the present application will be described in detail with reference to FIGS. 9 and 10 .
图9示出了本申请实施例提供的一种网络选择装置900的示意性框图，该装置900包括收发模块910和确定模块920。Figure 9 shows a schematic block diagram of a network selection device 900 provided by an embodiment of the present application. The device 900 includes a transceiver module 910 and a determination module 920.
可选地，该网络选择装置900可对应于上述实施例中的第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备，例如，可以为第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备中的部件(如电路、芯片或芯片***等)。Optionally, the network selection device 900 may correspond to the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal device in the above embodiment, for example, it may be the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal device. Components (such as circuits, chips or chip systems, etc.).
应理解，该网络选择装置900可对应于根据本申请实施例的方法500至800中的第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备，该网络选择装置900可以包括用于执行图5中的方法500至图8中的方法800中第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备执行的方法的模块。并且，该网络选择装置900中的各模块和上述其他操作和/或功能分别为了实现图5中的方法500至图8中的方法800的相应流程。It should be understood that the network selection device 900 may correspond to the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal device in the methods 500 to 800 according to the embodiment of the present application, and the network selection device 900 may include a device for executing the steps in Figure 5 The method 500 to the method 800 in Figure 8 is a module of the method executed by the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal device. Moreover, each module in the network selection device 900 and the above-mentioned other operations and/or functions are respectively intended to implement the corresponding processes of the method 500 in FIG. 5 to the method 800 in FIG. 8 .
应理解，该网络选择装置900为第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备时，该网络选择装置900中的收发模块910可以通过收发器实现，例如可对应于图10中示出的网络选择装置1000中的收发器1020。该网络选择装置900中的确定模块920可通过至少一个处理器实现，例如可对应于图10中示出的通信装置网络选择装置1000中的处理器1010。It should be understood that when the network selection device 900 is the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal equipment, the transceiver module 910 in the network selection device 900 can be implemented by a transceiver, for example, it can correspond to the one shown in Figure 10 Transceiver 1020 in network selection device 1000. The determination module 920 in the network selection device 900 may be implemented by at least one processor, for example, may correspond to the processor 1010 in the communication device network selection device 1000 shown in FIG. 10 .
还应理解，该网络选择装置900为配置于第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备中的芯片或芯片***时，该网络选择装置900中的收发模块910可以通过输入/输出接口、电路等实现，该网络选择装置900中的确定模块920可以通过该芯片 或芯片***上集成的处理器、微处理器或集成电路等实现。It should also be understood that when the network selection device 900 is a chip or chip system configured in the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal equipment, the transceiver module 910 in the network selection device 900 can use the input/output interface, circuit etc., the determination module 920 in the network selection device 900 can pass the chip Or a processor, microprocessor or integrated circuit integrated on a chip system.
图10是本申请实施例提供的另一种网络选择装置1000的示意性框图。如图10所示，该网络选择装置1000包括处理器1010、收发器1020和存储器1030。其中，处理器1010、收发器1020和存储器1030通过内部连接通路互相通信，该存储器1030用于存储指令，该处理器1010用于执行该存储器1030存储的指令，以控制该收发器1020发送信号和/或接收信号。Figure 10 is a schematic block diagram of another network selection device 1000 provided by an embodiment of the present application. As shown in FIG. 10 , the network selection device 1000 includes a processor 1010 , a transceiver 1020 and a memory 1030 . Among them, the processor 1010, the transceiver 1020 and the memory 1030 communicate with each other through internal connection paths. The memory 1030 is used to store instructions. The processor 1010 is used to execute the instructions stored in the memory 1030 to control the transceiver 1020 to send signals and /or receive a signal.
应理解，网络选择装置1000可以对应于第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备，并且可以用于执行上述方法实施例中第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备执行的各个步骤和/或流程。可选地，该存储器1030可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。存储器1030可以是一个单独的器件，也可以集成在处理器1010中。该处理器1010可以用于执行存储器1030中存储的指令，并且当该处理器1010执行存储器中存储的指令时，该处理器1010用于执行上述方法实施例中与第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备对应的各个步骤和/或流程。It should be understood that the network selection device 1000 may correspond to the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal equipment, and may be used to perform each of the steps performed by the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal equipment in the above method embodiments. steps and/or processes. Optionally, the memory 1030 may include read-only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. The memory 1030 may be a separate device or integrated into the processor 1010. The processor 1010 can be used to execute instructions stored in the memory 1030, and when the processor 1010 executes the instructions stored in the memory, the processor 1010 is used to execute the first VPLMN AMF, HPLMN UDM, Each step and/or process corresponding to HPLMN NSSF or terminal equipment.
可选地，该网络选择装置1000是第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备。Optionally, the network selection device 1000 is the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal equipment.
其中，收发器1020可以包括发射机和接收机。收发器1020还可以进一步包括天线，天线的数量可以为一个或多个。该处理器1010和存储器1030与收发器1020可以是集成在不同芯片上的器件。如，处理器1010和存储器1030可以集成在基带芯片中，收发器1020可以集成在射频芯片中。该处理器1010和存储器1030与收发器1020也可以是集成在同一个芯片上的器件。本申请对此不作限定。Among them, the transceiver 1020 may include a transmitter and a receiver. The transceiver 1020 may further include an antenna, and the number of antennas may be one or more. The processor 1010, the memory 1030 and the transceiver 1020 may be devices integrated on different chips. For example, the processor 1010 and the memory 1030 can be integrated in a baseband chip, and the transceiver 1020 can be integrated in a radio frequency chip. The processor 1010, the memory 1030 and the transceiver 1020 may also be devices integrated on the same chip. This application does not limit this.
可选地，该网络选择装置1000是配置在第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备中的部件，如电路、芯片、芯片***等。Optionally, the network selection device 1000 is a component configured in the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal equipment, such as a circuit, a chip, a chip system, etc.
其中，收发器1020也可以是通信接口，如输入/输出接口、电路等。该收发器1020与处理器1010和存储器1030都可以集成在同一个芯片中，如集成在基带芯片中。The transceiver 1020 may also be a communication interface, such as an input/output interface, a circuit, etc. The transceiver 1020, the processor 1010 and the memory 1030 can be integrated in the same chip, such as a baseband chip.
本申请还提供了一种处理装置，包括至少一个处理器，所述至少一个处理器用于执行存储器中存储的计算机程序，以使得所述处理装置执行上述任一方法实施例中第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备所执行的方法。This application also provides a processing device, including at least one processor, the at least one processor is used to execute a computer program stored in the memory, so that the processing device executes the first VPLMN AMF, HPLMN UDM, HPLMN NSSF, or the method executed by the end device.
本申请实施例还提供了一种处理装置，包括处理器和通信接口。所述通信接口与所述处理器耦合。所述通信接口用于输入和/或输出信息。所述信息包括指令和数据中的至少一项。所述处理器用于执行计算机程序，以使得所述处理装置执行上述任一方法实施例中第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备所执行的方法。An embodiment of the present application also provides a processing device, including a processor and a communication interface. The communication interface is coupled to the processor. The communication interface is used to input and/or output information. The information includes at least one of instructions and data. The processor is used to execute a computer program, so that the processing device executes the method executed by the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal device in any of the above method embodiments.
本申请实施例还提供了一种处理装置，包括处理器和存储器。所述存储器用于存储计算机程序，所述处理器用于从所述存储器调用并运行所述计算机程序，以使得所述处理装置执行上述任一方法实施例中第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备所执行的方法。An embodiment of the present application also provides a processing device, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the processing device executes the first VPLMN AMF, HPLMN UDM, HPLMN NSSF in any of the above method embodiments. Or the method executed by the terminal device.
应理解，上述处理装置可以是一个或多个芯片。例如，该处理装置可以是现场可编程门阵列(field programmable gate array，FPGA)，可以是专用集成芯片(application specific integrated circuit，ASIC)，还可以是***芯片(system on chip，SoC)，还可以是中央处 理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。It should be understood that the above-mentioned processing device may be one or more chips. For example, the processing device can be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), or It's the central office It can be a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), or a microcontroller unit (MCU). ), or it can be a programmable logic device (PLD) or other integrated chip.
在实现过程中，上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。During the implementation process, each step of the above method can be completed by instructions in the form of hardware integrated logic circuits or software in the processor. The steps of the methods disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware processor for execution, or can be executed by a combination of hardware and software modules in the processor. The software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
应注意，本申请实施例中的处理器可以是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. During the implementation process, each step of the above method embodiment can be completed through an integrated logic circuit of hardware in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. . Each method, step and logical block diagram disclosed in the embodiment of this application can be implemented or executed. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的***和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。It can be understood that the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of illustration, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.
根据本申请实施例提供的方法，本申请还提供一种计算机程序产品，该计算机程序产品包括：计算机程序代码，当该计算机程序代码在计算机上运行时，使得该计算机执行图5至图8所示实施例中的第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备执行的方法。According to the method provided by the embodiment of the present application, the present application also provides a computer program product. The computer program product includes: computer program code. When the computer program code is run on a computer, it causes the computer to execute the steps shown in Figures 5 to 8. The method executed by the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal device in the illustrated embodiment.
根据本申请实施例提供的方法，本申请还提供一种计算机可读存储介质，该计算机可读存储介质存储有程序代码，当该程序代码在计算机上运行时，使得该计算机执行图5至 图8所示实施例中的第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备执行的方法。According to the method provided by the embodiment of the present application, the present application also provides a computer-readable storage medium. The computer-readable storage medium stores program code. When the program code is run on a computer, it causes the computer to execute Figures 5 to 5. The method executed by the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal device in the embodiment shown in FIG. 8 .
上述各个装置实施例中的通信装置或基站和方法实施例中的第一VPLMN AMF、HPLMN UDM、HPLMN NSSF或终端设备完全对应，由相应的模块或单元执行相应的步骤，例如收发模块(收发器)执行方法实施例中接收或发送的步骤，除发送、接收外的其它步骤可以由确定模块(处理器)执行。具体单元的功能可以参考相应的方法实施例。其中，处理器可以为一个或多个。The communication device or base station in each of the above device embodiments corresponds completely to the first VPLMN AMF, HPLMN UDM, HPLMN NSSF or terminal equipment in the method embodiment, and the corresponding steps are performed by the corresponding modules or units, such as the transceiver module (transceiver ) perform the steps of receiving or sending in the method embodiment. Other steps except sending and receiving may be executed by the determination module (processor). For the functions of specific units, please refer to the corresponding method embodiments. There can be one or more processors.
在本说明书中使用的术语“部件”、“模块”、“***”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。通过图示，在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中，部件可位于一个计算机上和/或分布在2个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读介质执行。部件可例如根据具有一个或多个数据分组(例如来自与本地***、分布式***和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它***交互的互联网)的信号通过本地和/或远程进程来通信。The terms "component", "module", "system", etc. used in this specification are used to refer to computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to, a process, a processor, an object, an executable file, a thread of execution, a program and/or a computer running on a processor. Through the illustrations, both applications running on the computing device and the computing device may be components. One or more components can reside in a process and/or thread of execution and a component can be localized on one computer and/or distributed between 2 or more computers. Additionally, these components can execute from various computer-readable media having various data structures stored thereon. A component may, for example, be based on a signal having one or more data packets (eg, data from two components interacting with another component, a local system, a distributed system, and/or a network, such as the Internet, which interacts with other systems via signals) Communicate through local and/or remote processes.
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的***、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.
在本申请所提供的几个实施例中，应该理解到，所揭露的***、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而 前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. and The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes.
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。 The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (28)

  1. 一种网络选择方法，其特征在于，包括：A network selection method, characterized by including:
    从终端设备接收第一消息，所述第一消息用于请求接入第一拜访地公共陆地移动通信网络VPLMN，所述第一消息包括所述终端设备请求在所述第一VPLMN接入的一个或多个切片；A first message is received from a terminal device. The first message is used to request access to a first visited public land mobile communication network VPLMN. The first message includes a request by the terminal device to access the first VPLMN. or multiple slices;
    在所述第一VPLMN不支持所述终端设备请求接入的切片中的至少一个的情况下，向归属地公共陆地移动通信网络HPLMN的统一数据管理UDM网元发送所述终端设备的位置信息和所述HPLMN的一个或多个切片的信息，其中，所述HPLMN的一个或多个切片与所述终端设备请求在所述第一VPLMN接入的一个或多个切片具有映射关系；In the case that the first VPLMN does not support at least one of the slices requested by the terminal device to access, send the location information of the terminal device and the unified data management UDM network element of the home public land mobile communication network HPLMN. Information about one or more slices of the HPLMN, wherein the one or more slices of the HPLMN have a mapping relationship with the one or more slices that the terminal device requests to access in the first VPLMN;
    从所述UDM接收第二VPLMN的选网优先级，所述第二VPLMN的选网优先级高于所述第一VPLMN的选网优先级，所述第二VPLMN支持的切片包括分别与所述HPLMN的一个或多个切片具有映射关系的切片；The network selection priority of the second VPLMN is received from the UDM. The network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN. The slices supported by the second VPLMN include slices corresponding to the network selection priority of the second VPLMN. One or more slices of HPLMN have slices with mapping relationships;
    向所述终端设备发送所述第二VPLMN的选网优先级。Send the network selection priority of the second VPLMN to the terminal device.
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：The method of claim 1, further comprising:
    向所述UDM发送第一指示信息，所述第一指示信息用于指示更新选网优先级；Send first indication information to the UDM, where the first indication information is used to indicate updating the network selection priority;
    所述从所述UDM接收第二VPLMN的选网优先级，包括：The receiving the network selection priority of the second VPLMN from the UDM includes:
    从所述UDM接收更新后的选网优先级，所述更新后的选网优先级用于指示所述第二VPLMN的选网优先级高于所述第一VPLMN的选网优先级。An updated network selection priority is received from the UDM, and the updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  3. 根据权利要求2所述方法，其特征在于，所述向所述UDM发送第一指示信息，包括：The method according to claim 2, characterized in that sending the first indication information to the UDM includes:
    在确定所述第一VPLMN不支持所述终端设备请求接入的切片中的至少一个的情况下，向所述UDM发送所述第一指示信息。If it is determined that the first VPLMN does not support at least one of the slices that the terminal device requests to access, the first indication information is sent to the UDM.
  4. 根据权利要求1-3中任一项所述方法，其特征在于，所述第一消息还包括第二指示信息，所述第二指示信息用于指示若所述第一VPLMN不支持所述终端设备请求接入的切片中的至少一个，为所述终端设备寻找支持所述终端设备请求接入的全部切片的其他VPLMN的信息。The method according to any one of claims 1-3, characterized in that the first message further includes second indication information, the second indication information is used to indicate if the first VPLMN does not support the terminal For at least one of the slices that the device requests access to, search for information about other VPLMNs that support all slices that the terminal device requests to access for the terminal device.
  5. 一种网络选择方法，其特征在于，包括：A network selection method, characterized by including:
    从终端设备接收第一消息，所述第一消息用于请求接入第一拜访地公共陆地移动通信网络VPLMN，所述第一消息包括所述终端设备请求在所述第一VPLMN接入的一个或多个切片；A first message is received from a terminal device. The first message is used to request access to a first visited public land mobile communication network VPLMN. The first message includes a request by the terminal device to access the first VPLMN. or multiple slices;
    在所述第一VPLMN不支持所述终端设备请求接入的切片中的至少一个的情况下，向归属地公共陆地移动通信网络HPLMN的统一数据管理UDM网元发送所述终端设备的位置信息和所述HPLMN的一个或多个切片的信息，其中，所述HPLMN的一个或多个切片与所述终端设备请求在所述第一VPLMN接入的一个或多个切片具有映射关系；In the case that the first VPLMN does not support at least one of the slices requested by the terminal device to access, send the location information of the terminal device and the unified data management UDM network element of the home public land mobile communication network HPLMN. Information about one or more slices of the HPLMN, wherein the one or more slices of the HPLMN have a mapping relationship with the one or more slices that the terminal device requests to access in the first VPLMN;
    从所述UDM接收至少一个候选VPLMN的信息以及与所述至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的所述HPLMN的切片的信息，其中，与所述每个候选VPLMN支持的切片具有映射关系的所述HPLMN的切片包括部分与所述终端设备请求在第一VPLMN接入的切片具有映射关系的所述HPLMN的切片； Receive from the UDM information of at least one candidate VPLMN and information of slices of the HPLMN that have a mapping relationship with slices supported by each candidate VPLMN in the at least one candidate VPLMN, where, with the slices supported by each candidate VPLMN The slices of the HPLMN that have a mapping relationship include a portion of the HPLMN slices that have a mapping relationship with the slice that the terminal device requests to access in the first VPLMN;
    向所述终端设备发送所述至少一个候选VPLMN的信息以及与所述每个候选VPLMN支持的切片具有映射关系的所述HPLMN的切片的信息；Send to the terminal device information about the at least one candidate VPLMN and information about slices of the HPLMN that have a mapping relationship with slices supported by each candidate VPLMN;
    从所述终端设备接收第二VPLMN的信息，所述第二VPLMN为所述至少一个候选VPLMN中的一个；Receive information of a second VPLMN from the terminal device, where the second VPLMN is one of the at least one candidate VPLMN;
    向所述UDM发送所述第二VPLMN的信息，以请求更新所述第二VPLMN的选网优先级。Send the information of the second VPLMN to the UDM to request updating the network selection priority of the second VPLMN.
  6. 根据权利要求5所述的方法，其特征在于，在所述向所述UDM发送所述第二VPLMN的信息之后，所述方法还包括：The method according to claim 5, characterized in that, after sending the information of the second VPLMN to the UDM, the method further includes:
    从所述UDM接收所述第二VPLMN的选网优先级，所述第二VPLMN的选网优先级高于所述第一VPLMN的选网优先级；Receive the network selection priority of the second VPLMN from the UDM, and the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN;
    向所述终端设备发送所述第二VPLMN的选网优先级。Send the network selection priority of the second VPLMN to the terminal device.
  7. 根据权利要求6所述的方法，其特征在于，所述方法还包括：The method of claim 6, further comprising:
    向所述UDM发送第一指示信息，所述第一指示信息用于指示更新选网优先级；Send first indication information to the UDM, where the first indication information is used to indicate updating the network selection priority;
    所述从所述UDM接收所述第二VPLMN的选网优先级，包括：The receiving the network selection priority of the second VPLMN from the UDM includes:
    从所述UDM接收更新后的选网优先级，所述更新后的选网优先级用于指示所述第二VPLMN的选网优先级高于所述第一VPLMN的选网优先级。An updated network selection priority is received from the UDM, and the updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  8. 根据权利要求7所述的方法，其特征在于，所述向所述UDM发送第一指示信息，包括：The method according to claim 7, wherein sending the first indication information to the UDM includes:
    在确定所述第一VPLMN不支持请求接入的切片中的至少一个的情况下，向所述UDM发送所述第一指示信息。If it is determined that the first VPLMN does not support at least one of the slices requested for access, the first indication information is sent to the UDM.
  9. 根据权利要求5-8中任一项所述方法，其特征在于，所述第一消息还包括第二指示信息，所述第二指示信息用于指示若所述第一VPLMN不支持所述终端设备请求接入的切片中的至少一个，为所述终端设备寻找支持所述终端设备请求接入的全部切片的其他VPLMN的信息。The method according to any one of claims 5 to 8, characterized in that the first message further includes second indication information, the second indication information is used to indicate if the first VPLMN does not support the terminal For at least one of the slices that the device requests access to, search for information about other VPLMNs that support all slices that the terminal device requests to access for the terminal device.
  10. 一种网络选择方法，其特征在于，包括：A network selection method, characterized by including:
    从第一拜访地公共陆地移动通信网络VPLMN接收终端设备的位置信息和归属地公共陆地移动通信网络HPLMN的一个或多个切片的信息，其中，所述HPLMN的一个或多个切片与所述终端设备请求在所述第一VPLMN接入的一个或多个切片具有映射关系；Receive location information of the terminal device and information of one or more slices of the home public land mobile communications network HPLMN from the first visited public land mobile communications network VPLMN, wherein the one or more slices of the HPLMN are consistent with the terminal The device requests that one or more slices accessed by the first VPLMN have a mapping relationship;
    向HPLMN的网络切片选择功能NSSF网元发送所述终端设备的位置信息和所述HPLMN的一个或多个切片的信息；Send the location information of the terminal device and the information of one or more slices of the HPLMN to the network slice selection function NSSF network element of the HPLMN;
    从所述NSSF接收第二VPLMN的信息，所述第二VPLMN支持的切片包括分别与所述HPLMN的一个或多个切片具有映射关系的切片；Receive information of a second VPLMN from the NSSF, where the slices supported by the second VPLMN include slices that respectively have a mapping relationship with one or more slices of the HPLMN;
    向所述第一VPLMN发送所述第二VPLMN的选网优先级，所述第二VPLMN的选网优先级高于所述第一VPLMN的选网优先级。Send the network selection priority of the second VPLMN to the first VPLMN, where the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  11. 根据权利要求10所述的方法，其特征在于，所述方法还包括：The method of claim 10, further comprising:
    从所述第一VPLMN接收第一指示信息，所述第一指示信息用于指示更新选网优先级；Receive first indication information from the first VPLMN, where the first indication information is used to indicate updating the network selection priority;
    所述向所述第一VPLMN发送第二VPLMN的选网优先级，包括：The sending the network selection priority of the second VPLMN to the first VPLMN includes:
    向所述第一VPLMN发送更新后的选网优先级，所述更新后的选网优先级用于指示所述第二VPLMN的选网优先级高于所述第一VPLMN的选网优先级。 Send an updated network selection priority to the first VPLMN, where the updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  12. 一种网络选择方法，其特征在于，包括：A network selection method, characterized by including:
    从第一拜访地公共陆地移动通信网络VPLMN接收终端设备的位置信息和归属地公共陆地移动通信网络HPLMN的一个或多个切片的信息，其中，所述HPLMN的一个或多个切片与所述终端设备请求在所述第一VPLMN接入的一个或多个切片具有映射关系；Receive location information of the terminal device and information of one or more slices of the home public land mobile communications network HPLMN from the first visited public land mobile communications network VPLMN, wherein the one or more slices of the HPLMN are consistent with the terminal The device requests that one or more slices accessed by the first VPLMN have a mapping relationship;
    向HPLMN的网络切片选择功能NSSF网元发送所述终端设备的位置信息和所述HPLMN的一个或多个切片的信息；Send the location information of the terminal device and the information of one or more slices of the HPLMN to the network slice selection function NSSF network element of the HPLMN;
    从所述NSSF接收至少一个候选VPLMN的信息以及与所述至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的所述HPLMN的切片的信息，其中，与所述每个候选VPLMN支持的切片具有映射关系的HPLMN的切片包括部分与所述终端设备请求在第一VPLMN接入的切片具有映射关系的所述HPLMN的切片；Receive from the NSSF information of at least one candidate VPLMN and information of slices of the HPLMN that have a mapping relationship with slices supported by each candidate VPLMN in the at least one candidate VPLMN, where, with the slices supported by each candidate VPLMN The HPLMN slices that have a mapping relationship include a portion of the HPLMN slices that have a mapping relationship with the slice that the terminal device requests to access in the first VPLMN;
    向所述第一VPLMN发送所述至少一个候选VPLMN的信息以及与所述每个候选VPLMN支持的切片具有映射关系的所述HPLMN的切片的信息；Send to the first VPLMN information about the at least one candidate VPLMN and information about slices of the HPLMN that have a mapping relationship with slices supported by each candidate VPLMN;
    从所述第一VPLMN接收第二VPLMN的信息，所述第二VPLMN为所述至少一个候选VPLMN中的一个。Information of a second VPLMN is received from the first VPLMN, and the second VPLMN is one of the at least one candidate VPLMN.
  13. 根据权利要求12所述的方法，其特征在于，在所述从所述第一VPLMN接收第二VPLMN的信息之后，所述方法还包括：The method according to claim 12, characterized in that, after receiving the information of the second VPLMN from the first VPLMN, the method further includes:
    向所述第一VPLMN发送所述第二VPLMN的选网优先级，所述第二VPLMN的选网优先级高于所述第一VPLMN的选网优先级。Send the network selection priority of the second VPLMN to the first VPLMN, where the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  14. 根据权利要求13所述的方法，其特征在于，所述方法还包括：The method of claim 13, further comprising:
    从所述第一VPLMN接收第一指示信息，所述第一指示信息用于指示更新选网优先级；Receive first indication information from the first VPLMN, where the first indication information is used to indicate updating the network selection priority;
    所述向所述第一VPLMN发送所述第二VPLMN的选网优先级，包括：The sending the network selection priority of the second VPLMN to the first VPLMN includes:
    向所述第一VPLMN发送更新后的选网优先级，所述更新后的选网优先级用于指示所述第二VPLMN的选网优先级高于所述第一VPLMN的选网优先级。Send an updated network selection priority to the first VPLMN, where the updated network selection priority is used to indicate that the network selection priority of the second VPLMN is higher than the network selection priority of the first VPLMN.
  15. 一种网络选择方法，其特征在于，包括：A network selection method, characterized by including:
    从归属地公共陆地移动通信网络HPLMN的统一数据管理功能UDM网元接收终端设备的位置信息和HPLMN的一个或多个切片的信息，其中，所述HPLMN的一个或多个切片与所述终端设备请求在第一VPLMN接入的一个或多个切片具有映射关系；Receives the location information of the terminal device and the information of one or more slices of the HPLMN from the unified data management function UDM network element of the home public land mobile communication network HPLMN, wherein the one or more slices of the HPLMN are related to the terminal device Request that one or more slices accessed by the first VPLMN have a mapping relationship;
    基于所述终端设备的位置信息和所述HPLMN的一个或多个切片的信息，确定候选拜访地公共陆地移动通信网络VPLMN，其中，与所述候选VPLMN支持的切片具有映射关系的HPLMN的切片包括部分与所述终端设备请求在第一VPLMN接入的切片具有映射关系的所述HPLMN的切片。Based on the location information of the terminal device and the information of one or more slices of the HPLMN, a candidate visited public land mobile communication network VPLMN is determined, wherein the slices of the HPLMN that have a mapping relationship with the slices supported by the candidate VPLMN include A portion of the slice of the HPLMN that has a mapping relationship with the slice of the first VPLMN requested by the terminal device.
  16. 根据权利要求15所述的方法，其特征在于，所述确定候选VPLMN，包括：The method according to claim 15, characterized in that determining the candidate VPLMN includes:
    向一个或者多个其他VPLMN的网络切片选择网元NSSF网元发送第二消息，所述第二消息用于请求所述一个或者多个其他VPLMN中每个其他VPLMN支持的切片的信息；Send a second message to the network slice selection network element NSSF network element of one or more other VPLMNs, where the second message is used to request information about slices supported by each other VPLMN in the one or more other VPLMNs;
    从所述一个或者多个其他VPLMN接收所述每个其他VPLMN支持的切片的信息；Receive information from the one or more other VPLMNs about the slices supported by each other VPLMN;
    将与所述一个或者多个其他VPLMN中支持的切片具有映射关系的所述HPLMN的切片包括部分与所述终端设备请求在第一VPLMN接入的切片具有映射关系的所述HPLMN的切片的VPLMN确定为所述候选VPLMN。 The slices of the HPLMN that have a mapping relationship with the slices supported in the one or more other VPLMNs include part of the VPLMNs that have a mapping relationship with the slices of the HPLMN that the terminal device requests to access in the first VPLMN. determined as the candidate VPLMN.
  17. 根据权利要求16所述的方法，其特征在于，所述每个其他VPLMN支持的切片包括与所述HPLMN的一个或多个切片具有映射关系的切片。The method of claim 16, wherein the slices supported by each other VPLMN include slices having a mapping relationship with one or more slices of the HPLMN.
  18. 根据权利要求15-17中任一项所述的方法，其特征在于，所述方法还包括：The method according to any one of claims 15-17, characterized in that the method further includes:
    当所述候选VPLMN在所述终端设备的位置支持所述HPLMN的一个或多个切片中的全部切片时，向所述UDM发送所述候选VPLMN的信息。When the candidate VPLMN supports all slices of one or more slices of the HPLMN at the location of the terminal device, the information of the candidate VPLMN is sent to the UDM.
  19. 根据权利要求15-17中任一项所述的方法，其特征在于，所述方法还包括：The method according to any one of claims 15-17, characterized in that the method further includes:
    当所述候选VPLMN在所述终端设备的位置支持所述HPLMN的一个或多个切片中的部分切片时，向所述UDM发送所述候选VPLMN的信息以及所述候选VPLMN支持的切片的信息。When the candidate VPLMN supports part of the one or more slices of the HPLMN at the location of the terminal device, the information of the candidate VPLMN and the information of the slices supported by the candidate VPLMN are sent to the UDM.
  20. 一种网络选择方法，其特征在于，包括：A network selection method, characterized by including:
    向第一拜访地公共陆地移动通信网络VPLMN发送第一消息，所述第一消息用于请求接入所述第一VPLMN，所述第一消息包括终端设备请求在所述第一VPLMN接入的一个或多个切片；Send a first message to the first visited public land mobile communication network VPLMN, where the first message is used to request access to the first VPLMN, where the first message includes a terminal device requesting access to the first VPLMN. one or more slices;
    从所述第一VPLMN接收至少一个候选VPLMN的信息以及与所述至少一个候选VPLMN中每个候选VPLMN支持的切片具有映射关系的归属地公共陆地移动通信网络HPLMN的切片的信息，其中，与所述每个候选VPLMN支持的切片具有映射关系的所述HPLMN的切片包括部分与所述终端设备请求在第一VPLMN接入的切片具有映射关系的所述HPLMN的切片；Information of at least one candidate VPLMN and information of slices of the home public land mobile communication network HPLMN having a mapping relationship with slices supported by each candidate VPLMN in the at least one candidate VPLMN are received from the first VPLMN, wherein, with the slices supported by the at least one candidate VPLMN, The slices of the HPLMN that have a mapping relationship with the slices supported by each candidate VPLMN include some of the slices of the HPLMN that have a mapping relationship with the slices that the terminal device requests to access in the first VPLMN;
    从所述至少一个候选VPLMN中确定第二VPLMN；Determine a second VPLMN from the at least one candidate VPLMN;
    向所述第一VPLMN发送所述第二VPLMN的信息，以请求更新所述第二VPLMN的选网优先级。Send the information of the second VPLMN to the first VPLMN to request updating the network selection priority of the second VPLMN.
  21. 根据权利要求20所述的方法，其特征在于，所述从至少一个候选VPLMN中确定第二VPLMN，包括：The method of claim 20, wherein determining the second VPLMN from at least one candidate VPLMN includes:
    根据用户的业务需求，从所述至少一个候选VPLMN中确定所述第二VPLMN。The second VPLMN is determined from the at least one candidate VPLMN according to the user's service requirements.
  22. 根据权利要求20或21所述的方法，其特征在于，所述方法还包括：The method according to claim 20 or 21, characterized in that, the method further includes:
    从所述第一VPLMN接收第三消息，所述第三消息携带所述第二VPLMN的选网优先级。A third message is received from the first VPLMN, where the third message carries the network selection priority of the second VPLMN.
  23. 根据权利要求权20-22中任一项所述的方法，其特征在于，所述第一消息还包括第二指示信息，所述第二指示信息用于指示若所述第一VPLMN不支持所述终端设备请求接入的切片中的至少一个，为所述终端设备寻找支持所述终端设备请求接入的全部切片的其他VPLMN的信息。The method according to any one of claims 20-22, characterized in that the first message further includes second indication information, and the second indication information is used to indicate that if the first VPLMN does not support all For at least one of the slices that the terminal device requests to access, search for information about other VPLMNs that support all slices that the terminal device requests to access for the terminal device.
  24. 一种网络选择方法，其特征在于，包括：A network selection method, characterized by including:
    向第一拜访地公共陆地移动通信网络VPLMN发送第一消息，所述第一消息用于请求接入所述第一VPLMN，所述第一消息包括终端设备在所述第一VPLMN请求接入的一个或多个切片；Send a first message to the first visited public land mobile communication network VPLMN, where the first message is used to request access to the first VPLMN, where the first message includes the information that the terminal device requests access to the first VPLMN. one or more slices;
    其中，所述第一消息还用于指示若所述第一VPLMN不支持所述终端设备请求接入的切片中的至少一个，为所述终端设备寻找支持所述终端设备请求接入的全部切片的其他VPLMN的信息。Wherein, the first message is also used to indicate that if the first VPLMN does not support at least one of the slices requested by the terminal device to access, find for the terminal device all slices that support the access requested by the terminal device. Information about other VPLMNs.
  25. 一种网络选择装置，其特征在于，包括用于执行如权利要求1-4中任一项所述方 法的模块，或者用于执行如权利要求5-9中任一项所述方法的模块，或者用于执行如权利要求10或11所述方法的模块，用于执行如权利要求12-14中任一项所述方法的模块，用于执行如权利要求15-19中任一项所述方法的模块，用于执行如权利要求20-23中任一项所述方法的模块，用于执行如权利要求24所述方法的模块。A network selection device, characterized in that it includes a method for executing the method as described in any one of claims 1-4. A module for performing the method, or a module for performing the method as claimed in any one of claims 5-9, or a module for performing the method as claimed in claims 10 or 11, or a module for performing the method as claimed in claims 12-14 A module for executing the method according to any one of claims 15-19, a module for executing the method according to any one of claims 20-23, for executing A module for the method of claim 24.
  26. 一种网络选择装置，其特征在于，包括：处理器和存储器，其中，所述处理器与存储器耦合，所述存储器用于存储计算机程序，当所述处理器调用所述计算机程序时，使得所述装置执行如权利要求1-4中任一项所述的方法，或使得所述装置执行如权利要求5-9中任一项所述的方法，或使得所述装置执行如权利要求10或11所述的方法，或使得所述装置执行如权利要求12-14中任一项所述的方法，或使得所述装置执行如权利要求15-19中任一项所述的方法，或使得所述装置执行如权利要求20-23中任一项所述的方法，或使得所述装置执行如权利要求24所述的方法。A network selection device, characterized by comprising: a processor and a memory, wherein the processor is coupled to the memory, and the memory is used to store a computer program. When the processor calls the computer program, the The device performs the method according to any one of claims 1-4, or causes the device to perform the method according to any one of claims 5-9, or causes the device to perform the method according to claim 10 or The method according to claim 11, or causing the device to perform the method according to any one of claims 12-14, or causing the device to perform the method according to any one of claims 15-19, or making The device performs the method according to any one of claims 20-23, or causes the device to perform the method according to claim 24.
  27. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1-4中任一项所述的方法，或使得所述计算机执行如权利要求5-9中任一项所述的方法，或使得所述计算机执行如权利要求10或11所述的方法，或使得所述计算机执行如权利要求12-14中任一项所述的方法，或使得所述计算机执行如权利要求15-19中任一项所述的方法，或使得所述计算机执行如权利要求20-23中任一项所述的方法，或使得所述计算机执行如权利要求24所述的方法。A computer-readable storage medium, characterized in that it is used to store a computer program, which when the computer program is run on a computer, causes the computer to perform the method according to any one of claims 1-4, or causing the computer to perform the method as claimed in any one of claims 5-9, or causing the computer to perform the method as claimed in claims 10 or 11, or causing the computer to perform the method as claimed in claims 12-14 The method of any one of the claims, or causing the computer to perform the method of any one of claims 15-19, or causing the computer to perform the method of any one of claims 20-23, Or causing the computer to perform the method according to claim 24.
  28. 一种计算机程序产品，其特征在于，所述计算机程序产品中包括计算机程序代码，当所述计算机程序代码在计算机上运行时，使得所述计算机执行如权利要求1-4中任一项所述的方法，或使得所述计算机执行如权利要求5-9中任一项所述的方法，或使得所述计算机执行如权利要求10或11所述的方法，或使得所述计算机执行如权利要求12-14中任一项所述的方法，或使得所述计算机执行如权利要求15-19中任一项所述的方法，或使得所述计算机执行如权利要求20-23中任一项所述的方法，或使得所述计算机执行如权利要求24所述的方法。 A computer program product, characterized in that the computer program product includes computer program code, and when the computer program code is run on a computer, it causes the computer to execute as described in any one of claims 1-4 method, or causing the computer to perform the method as claimed in any one of claims 5-9, or causing the computer to perform the method as claimed in claim 10 or 11, or causing the computer to perform the method as claimed in claim 10 or 11. The method according to any one of claims 12-14, or causing the computer to perform the method according to any one of claims 15-19, or causing the computer to perform the method according to any one of claims 20-23. The method described in claim 24, or causing the computer to perform the method described in claim 24.
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