WO2021233050A1 - Communication method and apparatus - Google Patents

Communication method and apparatus Download PDF

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Publication number
WO2021233050A1
WO2021233050A1 PCT/CN2021/088655 CN2021088655W WO2021233050A1 WO 2021233050 A1 WO2021233050 A1 WO 2021233050A1 CN 2021088655 W CN2021088655 W CN 2021088655W WO 2021233050 A1 WO2021233050 A1 WO 2021233050A1
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WIPO (PCT)
Prior art keywords
plmn
information
terminal
rejected
indication information
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PCT/CN2021/088655
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French (fr)
Chinese (zh)
Inventor
李岚涛
强鹂
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华为技术有限公司
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Publication of WO2021233050A1 publication Critical patent/WO2021233050A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration

Definitions

  • This application relates to the field of communication technology, and in particular to a communication method and device.
  • support user equipment according to the current public land mobile network (public land mobile network, PLMN) permitted (allowed) network slice selection assistance information (network slice selection assistance information, NSSAI), current PLMN
  • network slice selection assistance information network slice selection assistance information, NSSAI
  • the configured network slice selection assistance information (configured NSSAI) and/or the default configured network slice selection assistance information (default configured NSSAI) initiates registration in the current PLMN.
  • the aforementioned NSSAI may include at least one single network slice selection auxiliary information (single NSSAI, S-NSSAI), and each S-NSSAI may indicate one network slice.
  • the UE may carry the requested network slice selection assistance information (requested NSSAI) in the registration request message to request registration to the network slice indicated by the requested NSSAI, where the requested NSSAI may be allowed NSSAI, configured NSSAI And/or one or more S-NSSAIs in the default configured NSSAI.
  • the UE receives an instruction from the network side and learns that the S-NSSAI in allowed NSSAI, configured NSSAI, and/or default configured NSSAI belongs to the rejected NSSAI (rejected NSSAI), the UE will no longer choose to belong to the The S-NSSAI of the rejected NSSAI is regarded as the requested NSSAI.
  • the UE in the deregistered state may still choose the rejection indicated by the network side when it initiates registration.
  • the S-NSSAI is used as a requested NSSAI. According to these S-NSSAIs, the result of requesting registration can only be rejected, which reduces the efficiency of the UE registration process.
  • the present application provides a communication method and device to improve the efficiency of the UE registration process.
  • an embodiment of the present application provides a communication method, which may be executed by a UE or a component of the UE (such as a processor, a chip, or a chip system, etc.).
  • the UE can receive at least one rejected network slice information and first indication information from a network device deployed in the first PLMN (the first PLMN is the PLMN that the UE currently requests to register, or it can be Called the current PLMN (current PLMN)).
  • the first indication information after the first PLMN enters the deregistered state (enters state 5GMM-deregistered for the current PLMN), the UE retains the information of the rejected network slice associated with the first PLMN.
  • the UE can still retain the rejected network slice information associated with the first PLMN after the UE enters the deregistered state from the first PLMN according to the first indication information, so as to learn which network slice information is the rejected network
  • the sliced information can avoid repeated requests for registration based on the rejected network slice information, so as to improve registration efficiency.
  • the UE may receive a first registration rejection message from a network device, the first registration rejection message is used to indicate that the first registration request message is rejected, and the first registration rejection message may carry the at least one rejected Network slice information and the first indication information.
  • the UE may receive a first de-registration request message from the network device, where the first de-registration request message is used to instruct the UE to perform de-registration in the first PLMN.
  • the first deregistration request message may carry the information of the at least one rejected network slice and the first indication information.
  • the first indication information may be the re-registration indication information in the first de-registration request message.
  • the above rejected network slices may include network slices rejected because they are unavailable in the first PLMN, and network slices rejected because they are unavailable in the registration area where the UE is located. Or at least one of the network slices that was rejected due to the failure or revocation of authentication and authorization of the network slice.
  • the information of the network slices that are rejected due to being unavailable in the first PLMN may be retained.
  • the reservation is unavailable in the registration area where the UE is located. Information about rejected network slices.
  • the UE determines that the information of the network slice in the available network slice information set is the information of the rejected network slice, then the UE may send a second registration request message to the network device, the second registration request message Does not include network slice information, or in other words, the second registration request message does not carry requested NSSAI.
  • the available network slice information set includes information of network slices permitted by the first PLMN, information of network slices configured by the first PLMN, and information of network slices configured by default.
  • the available network slice information set may include allowed NSSAI (or referred to as allowed NSSAI (allowed NSSAI for the current PLMN) of the current PLMN (i.e., the first PLMN), configured NSSAI (or referred to as the configured NSSAI of the current PLMN). configured NSSAI for the current PLMN)) and default configured NSSAI.
  • allowed NSSAI for the current PLMN and configured NSSAI for the current PLMN can be indicated by the network device.
  • the UE may determine that the network slice information in the available network slice information set is all included in the rejected network slice information associated with the first PLMN.
  • the UE may receive second indication information from the network device, and the second indication information may be used to instruct the UE to turn off the N1 mode capability, and the UE may turn off the N1 mode capability according to the second indication information.
  • the UE After the UE determines that the information of the network slice in the available network slice information set is the information of the rejected network slice and sends the second registration request message, it can turn off the N1 mode capability according to the second indication information.
  • the UE When the network slice is rejected, the UE no longer attempts to register to the 5G network. After that, the UE may request to register to a long-term evolution (LTE) network to improve registration efficiency.
  • LTE long-term evolution
  • the UE may receive third indication information from the network device, and the third indication information is used to indicate that no default network slice is available, and the UE may turn off the N1 mode capability according to the third indication information, and Select from the first PLMN to the second PLMN.
  • the UE may turn off the N1 mode capability after receiving the third indication information for the first time, and select from the first PLMN to the second PLMN, or the UE may determine that the number of times the third indication information has been received reaches a threshold (such as 5 After), turn off the N1 mode capability, and select from the first PLMN to the second PLMN.
  • a threshold such as 5 After
  • the UE After the UE determines that the information of the network slice in the available network slice information set is the information of the rejected network slice and sends the second registration request message, it can turn off the N1 mode capability according to the third instruction information and execute the PLMN Choose not to try to register to the first PLMN but to try to register to other PLMNs to improve registration efficiency.
  • the UE may receive fourth indication information from the network device, where the fourth indication information is used to instruct the UE to perform PLMN selection. Then the UE can select from the first PLMN to the second PLMN according to the fourth indication information.
  • the UE After the UE determines that the network slice information in the available network slice information set is the information of the rejected network slice and sends the second registration request message, it can turn off the N1 mode capability according to the fourth instruction information, and execute PLMN Choose not to try to register to the first PLMN but to try to register to other PLMNs to improve registration efficiency.
  • the UE retains the information of the first PLMN after selecting from the first PLMN to the second PLMN.
  • the UE selects from the first PLMN to the second PLMN, it still retains the information of the first PLMN, so it can identify whether the second PLMN is still the first PLMN (or other PLMNs that were previously selected but failed to register).
  • the UE selects from the first PLMN to the second PLMN, and the first PLMN is different from the second PLMN, so as to avoid repeating requests for registration in the first PLMN.
  • the UE may store the information of the first PLMN in the first PLMN list.
  • the first PLMN list includes PLMNs with no available network slices. In other words, there are no available network slices for the PLMN in the first PLMN list.
  • the UE may determine the second PLMN according to the first PLMN list, where the second PLMN is not included in the first PLMN list. In other words, the UE may determine the second PLMN from the PLMNs that are not included in the first PLMN list, so as to avoid re-selecting PLMNs with no available network slices and improve registration efficiency.
  • the UE determines that the first PLMN is the same as the second PLMN according to the information of the first PLMN, and the UE turns off the N1 mode capability.
  • the UE recognizes that the first PLMN is consistent with the second PLMN, it can turn off the N1 mode capability, and no longer try to register to the first PLMN to improve registration efficiency, and the subsequent UE can perform PLMN selection again.
  • the UE determines that the second PLMN is the PLMN in the first PLMN list according to the information of the first PLMN, or in other words, the UE determines that the first PLMN list includes the second PLMN according to the information of the first PLMN, Then the UE turns off the N1 mode capability.
  • the UE recognizes that the second PLMN is the same as the PLMN in the first PLMN list that the UE tried to register but failed to register, it can turn off the N1 mode capability and no longer try to register to the PLMN to improve registration efficiency.
  • the subsequent UE can Perform PLMN selection again.
  • the UE determines that the candidate PLMNs searched when the N1 mode capability is turned on belong to the first PLMN list, the N1 mode capability is turned off, and the UE does not attempt to register to the PLMN to improve registration efficiency.
  • the UE may receive fifth indication information from the network device, and the fifth indication information may be used to indicate at least one information for guiding the network slice.
  • the UE may send a third registration request message to the network device according to the information for guiding the network slice, where the third registration request message includes at least one information for guiding the network slice.
  • the UE can request registration according to the guided network slice indicated by the network device to improve registration efficiency.
  • the UE may receive sixth indication information from the network device, the sixth indication information is used to indicate that the UE does not need to re-register, or to indicate that the UE does not need to re-register to the first PLMN, then The UE may delete the information of the rejected network slice associated with the first PLMN.
  • the UE can delete the stored information of the rejected network slice associated with the first PLMN according to the non-registration indication information.
  • the sixth indication information may be included in the second de-registration request message, which is used to instruct the UE to perform de-registration in the first PLMN, and the sixth indication information may specifically be non-re-registration indication information.
  • network equipment may include access and mobility management functions (AMF).
  • AMF access and mobility management functions
  • the embodiments of the present application provide a communication method, which may be executed by a UE, or may be executed by a component of the UE (such as a processor, a chip, or a chip system, etc.).
  • the UE can send a second registration request message to the network device.
  • the second registration request message does not include network slice information.
  • the second registration request message does not carry the requested NSSAI, and the network device is deployed in the first One PLMN.
  • the UE may receive the fourth indication information from the network device, and select from the first PLMN to the second PLMN according to the fourth indication information.
  • the UE After the UE sends the second registration request message that does not include network slice information, it shuts down the N1 mode capability according to the fourth instruction information from the network device, and performs PLMN selection, and tries to register under other PLMNs. Improve registration efficiency.
  • the UE retains the information of the first PLMN after selecting from the first PLMN to the second PLMN.
  • the UE selects from the first PLMN to the second PLMN, it still retains the information of the first PLMN, so it can identify whether the second PLMN is still the first PLMN (or other PLMNs that were previously selected but failed to register).
  • the UE selects from the first PLMN to the second PLMN, and the first PLMN is different from the second PLMN, so as to avoid repeating requests for registration in the first PLMN.
  • the UE may store the information of the first PLMN in the first PLMN list.
  • the first PLMN list includes PLMNs with no available network slices. In other words, there are no available network slices for the PLMN in the first PLMN list.
  • the UE may determine the second PLMN according to the first PLMN list, where the second PLMN is not included in the first PLMN list. In other words, the UE may determine the second PLMN from the PLMNs that are not included in the first PLMN list, so as to avoid re-selecting PLMNs with no available network slices and improve registration efficiency.
  • the UE determines that the first PLMN is the same as the second PLMN according to the information of the first PLMN, and the UE turns off the N1 mode capability.
  • the UE recognizes that the first PLMN is consistent with the second PLMN, it can turn off the N1 mode capability, and no longer try to register to the first PLMN to improve registration efficiency, and the subsequent UE can perform PLMN selection again.
  • the UE determines that the second PLMN is the PLMN in the first PLMN list according to the information of the first PLMN, or in other words, the UE determines that the first PLMN list includes the second PLMN according to the information of the first PLMN, Then the UE turns off the N1 mode capability.
  • the UE recognizes that the second PLMN is the same as the PLMN in the first PLMN list that the UE tried to register but failed to register, it can turn off the N1 mode capability and no longer try to register to the PLMN to improve registration efficiency.
  • the subsequent UE can Perform PLMN selection again.
  • the UE determines that the candidate PLMNs searched for when the N1 mode capability is turned on belong to the first PLMN list, the N1 mode capability is turned off, and the UE does not attempt to register to the PLMN to improve registration efficiency.
  • the UE may receive fifth indication information from the network device, and the fifth indication information may be used to indicate at least one information for guiding the network slice.
  • the UE may send a third registration request message to the network device according to the information for guiding the network slice, where the third registration request message includes at least one information for guiding the network slice.
  • the UE can request registration according to the guided network slice indicated by the network device to improve registration efficiency.
  • the UE may receive sixth indication information from the network device, where the sixth indication information is used to indicate that the UE does not need to re-register, or is used to indicate that the UE does not need to re-register with the first PLMN. Then the UE may delete the information of the rejected network slice associated with the first PLMN.
  • the sixth indication information may be included in the second de-registration request message, which is used to instruct the UE to perform de-registration in the first PLMN, and the sixth indication information may specifically be non-re-registration indication information.
  • the UE can delete the stored information of the rejected network slice associated with the first PLMN according to the non-registration indication information.
  • the UE may receive sixth indication information from the network device, the sixth indication information is used to indicate that the UE does not need to re-register, or to indicate that the UE does not need to re-register to the first PLMN, then The UE may delete the information of the rejected network slice associated with the first PLMN.
  • the UE can delete the stored information of the rejected network slice associated with the first PLMN according to the non-registration indication information.
  • the sixth indication information may be included in the second de-registration request message, which is used to instruct the UE to perform de-registration in the first PLMN, and the sixth indication information may specifically be non-re-registration indication information.
  • the above network equipment may include AMF.
  • the embodiments of the present application provide a communication method, which may be executed by a network device, or may be executed by a component of the network device (such as a processor, a chip, or a chip system, etc.).
  • the network device may be AMF.
  • the execution subject is AMF as an example for description.
  • the AMF can send the information of at least one rejected network slice and the first indication information to the UE.
  • AMF is deployed in the first PLMN.
  • the first indication information may be used to instruct the UE to retain the rejected network slice information associated with the first PLMN after the first PLMN enters the de-registration state.
  • the AMF may send a first registration rejection message or a first de-registration request message to the UE, and the first registration rejection message or the first de-registration request message includes information about at least one rejected network slice and The first instruction information.
  • the first registration rejection message is used to indicate that the first registration request message is rejected, and the first de-registration request message is used to instruct the UE to perform de-registration in the first PLMN.
  • the first indication information may be the re-registration indication information in the first de-registration request message.
  • the re-registration indication information may be used to indicate that the UE needs to re-register in the first PLMN after performing de-registration in the first PLMN.
  • the first indication information is specifically used to indicate that after the UE enters the de-registered state in the first PLMN, it retains information about the network slices that are rejected due to being unavailable in the first PLMN.
  • the first indication information may specifically indicate that the UE is in the de-registered state in the first PLMN and the registration area or tracking area where the UE resides remains unchanged. Information about rejected network slices.
  • the AMF may receive a second registration request message from a UE, and the second registration request message does not include network slice information, or in other words, the second registration request message does not carry the requested NSSAI.
  • the AMF may send second indication information to the UE, the second indication information is used to instruct the UE to turn off the N1 mode capability; or, the AMF may send third indication information to the UE, and the third indication information is used to indicate that no default network slice is available, And for instructing the UE to store the information of the first PLMN after the first PLMN performs PLMN selection; or, the AMF sends fourth indication information to the UE, the fourth indication information is used for instructing the UE to perform PLMN selection, and for Instruct the UE to store the information of the first PLMN after performing PLMN selection in the first PLMN.
  • the AMF may send fifth indication information to the UE, and the fifth indication information is used to indicate at least one boot network slice.
  • the AMF may also receive a third registration request message from the UE, where the third registration request message is used to request access to at least one guided network slice.
  • the third registration request message may include at least one piece of information for guiding the network slice.
  • the embodiments of the present application provide a communication method, which may be executed by a network device, or may be executed by a component of the network device (such as a processor, a chip, or a chip system, etc.).
  • the network device may be AMF.
  • the execution subject is AMF as an example for description.
  • the AMF can receive a second registration request message from a UE.
  • the second registration request message does not include network slice information, or in other words, the second registration request message does not carry the requested NSSAI.
  • the AMF may send second indication information to the UE, the second indication information is used to instruct the UE to turn off the N1 mode capability; or, the AMF may send third indication information to the UE, and the third indication information is used to indicate that no default network slice is available, And for instructing the UE to store the information of the first PLMN after the first PLMN performs PLMN selection; or, the AMF sends fourth indication information to the UE, the fourth indication information is used for instructing the UE to perform PLMN selection, and for Instruct the UE to store the information of the first PLMN after performing PLMN selection in the first PLMN.
  • the AMF may send fifth indication information to the UE, and the fifth indication information is used to indicate at least one boot network slice.
  • the AMF may also receive a third registration request message from the UE, where the third registration request message is used to request access to at least one guided network slice.
  • the third registration request message may include at least one piece of information for guiding the network slice.
  • an embodiment of the present application provides a communication device, which is configured to implement the function of the UE in the foregoing first aspect or each possible design example of the first aspect.
  • the function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the structure of the communication device may include a communication module and a processing module, and these modules may perform the corresponding functions of the UE in the first aspect or each possible design example of the first aspect.
  • these modules may perform the corresponding functions of the UE in the first aspect or each possible design example of the first aspect.
  • the first aspect The detailed description in the aspect will not be repeated here.
  • the structure of the communication device includes a processor, and optionally a transceiver and a memory.
  • the transceiver can be used to send and receive information or data, and to communicate and interact with other communication devices in the network system.
  • the processor is configured to support the communication device to perform the corresponding function of the UE in the foregoing first aspect or each possible design example of the first aspect.
  • the memory is coupled with the processor, and is used to store necessary program instructions and data of the first communication device.
  • the communication device is a UE or a component in the UE, such as a chip, a transceiver, and so on.
  • an embodiment of the present application provides a communication device, which is configured to implement the function of the UE in the foregoing second aspect or each possible design example of the second aspect.
  • the function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the structure of the communication device may include a communication module and a processing module, and these modules may perform the corresponding functions of the UE in the second aspect or each possible design example of the second aspect.
  • these modules may perform the corresponding functions of the UE in the second aspect or each possible design example of the second aspect.
  • the structure of the communication device may include a communication module and a processing module, and these modules may perform the corresponding functions of the UE in the second aspect or each possible design example of the second aspect.
  • the structure of the communication device includes a processor, and optionally a transceiver and a memory.
  • the transceiver can be used to send and receive information or data, and to communicate and interact with other communication devices in the network system.
  • the processor is configured to support the communication device to perform the corresponding function of the UE in the foregoing second aspect or each possible design example of the second aspect.
  • the memory is coupled with the processor, and is used to store necessary program instructions and data of the first communication device.
  • the communication device is a UE or a component in the UE, such as a chip, a transceiver, and so on.
  • an embodiment of the present application provides a communication device, which is configured to implement the function of the network device in the foregoing third aspect or each possible design example of the third aspect.
  • the function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the structure of the communication device may include a communication module and a processing module, and these modules can perform the corresponding functions of the network device in the third aspect or each possible design example of the third aspect.
  • these modules can perform the corresponding functions of the network device in the third aspect or each possible design example of the third aspect.
  • the method The detailed description in the example will not be repeated here.
  • the structure of the communication device includes a processor, and optionally a communication interface (such as a wireless transceiver) and a memory.
  • the communication interface can be used to send and receive information or data, and to communicate and interact with other communication devices in the network system.
  • the processor is configured to support the communication device to execute the corresponding function of the network device in the foregoing third aspect or each possible design example of the third aspect.
  • the memory is coupled with the processor, and is used to store necessary program instructions and data of the first communication device.
  • the communication device is a network device or a component in the network device, such as a chip, a transceiver, and so on.
  • the network device can be AMF.
  • an embodiment of the present application provides a communication device, where the communication device is configured to implement the function of the network device in the foregoing fourth aspect or each possible design example of the fourth aspect.
  • the function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the structure of the communication device may include a communication module and a processing module, and these modules can perform the corresponding functions of the network device in the fourth aspect or each possible design example of the fourth aspect.
  • these modules can perform the corresponding functions of the network device in the fourth aspect or each possible design example of the fourth aspect.
  • the method The detailed description in the example will not be repeated here.
  • the structure of the communication device includes a processor, and optionally a communication interface (such as a wireless transceiver) and a memory.
  • the communication interface can be used to send and receive information or data, and to communicate and interact with other communication devices in the network system.
  • the processor is configured to support the communication device to perform the corresponding function of the network device in the foregoing fourth aspect or each possible design example of the fourth aspect.
  • the memory is coupled with the processor, and is used to store necessary program instructions and data of the first communication device.
  • the communication device is a network device or a component in the network device, such as a chip, a transceiver, and so on.
  • the network device can be AMF.
  • an embodiment of the present application provides a communication system.
  • the communication system may include the communication device provided in the above fifth aspect and the communication device provided in the above seventh aspect, or the communication system may include the communication device provided in the above sixth aspect and the communication device provided in the above eighth aspect .
  • this application provides a computer storage medium in which a program is stored or, when it is invoked for execution on a computer, the computer can execute any one of the above-mentioned first aspect or the first aspect.
  • this application provides a computer program product.
  • the basic computing product may include a program or instruction.
  • the computer program product runs on a computer, the computer executes any one of the first aspect or the first aspect.
  • One of the possible designs, any one of the second or second aspects, any one of the third or third aspects, or any one of the fourth or fourth aspects The method described.
  • the present application provides a chip or a chip system including the chip, and the chip may include a processor.
  • the chip may also include a memory (or storage module) and/or a transceiver (or communication module).
  • the chip can be used to implement any possible design of the first aspect or the first aspect, any possible design of the second or second aspect, and any possible design of the third aspect or the third aspect. Or the method described in the fourth aspect or any one of the possible designs of the fourth aspect.
  • the chip system may be composed of the above-mentioned chips, or may include the above-mentioned chips and other discrete devices, such as a memory (or storage module) and/or a transceiver (or communication module).
  • beneficial effects of the third aspect to the twelfth aspect and its possible designs can be referred to the beneficial effects of the method described in the first aspect and any of its possible designs or the second aspect and any of its possible designs. describe.
  • FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of this application.
  • FIG. 2 is a schematic flowchart of a communication method provided by an embodiment of this application.
  • FIG. 3 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 4 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 5 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 6 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 7 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 9 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 10 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • this application provides a communication method.
  • the application will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific operation methods in the method embodiments introduced below may also be applied to the device embodiment or the system embodiment.
  • the communication method provided in this application may include an access network element, a mobility management network element, a network slice selection network element, a policy control network element, a session management network element, a user plane network element, a data management network element, or an application function network.
  • the communication system of some or all of the network elements in the element is realized. It should be understood that this application does not limit the communication system to include other network elements than those listed above.
  • the communication method provided in the embodiment of the present application may be used in the 5G mobile communication system as shown in FIG. 1.
  • the following describes the communication system to which the communication method provided in the embodiment of the present application may be applied according to the architecture shown in FIG. 1.
  • the network architecture shown in Figure 1 may include three parts: UE, data network (DN), and operator network.
  • the operator network may include network slice selection function (NSSF), policy control function (PCF), unified data management (UDM), application function (AF) , Access and mobility management function (access and mobility management function, AMF), session management function (session management function, SMF), (wireless) access network ((radio) access network, (R) AN), UPF, etc.
  • NSF network slice selection function
  • PCF policy control function
  • UDM unified data management
  • AF application function
  • AMF Access and mobility management function
  • AMF Access and mobility management function
  • session management function session management function
  • SMF session management function
  • (wireless) access network ((radio) access network, (R) AN), UPF, etc.
  • core network CN
  • core network CN
  • N1, N2, N3, N4, N6, N9, Nnssf, Nnef, Nnrf, Npcf, Nudm, Naf, Nausf, Namf, and Nsmf identify interfaces.
  • the meanings of these interfaces can be referred to the meanings defined in the 3rd generation partnership project (3rd generation partnership project, 3GPP) related standard protocols, which are not limited here.
  • the above-mentioned mobility management network element may be a control plane network element provided by the operator's network, which is responsible for access control and mobility management when the terminal accesses the operator's network. It has, for example, mobility status management and user allocation. Functions such as temporary identification, authentication and authorization of users.
  • the mobility management network element can be the above-mentioned AMF.
  • future communications such as the 6th generation (6G)
  • the mobility management network element can still be AMF or have other names. The application is not limited.
  • the UE can access the AMF to obtain services provided by the operator's network.
  • the process of the UE accessing the AMF may be referred to as registration in this application, such as initial registration.
  • the UE may send a registration request message to the AMF, and the requested NSSAI may be carried in the registration request message, thereby requesting registration to the network slice indicated by the requested NSSAI.
  • the network slice selection network element can be used to perform functions such as network slice selection, allowed NSSAI determination, and configured NSSAI determination.
  • the network slice selection network element can be NSSF.
  • future communications such as the 6th generation (6G)
  • the network slice selection network element can still be NSSF or have other names, which is not limited in this application. .
  • the policy control network element is a control plane function provided by the operator to provide a PDU session policy to the session management network element.
  • Strategies may include charging-related strategies, quality of service (QoS)-related strategies, data flow identification and orientation (or forwarding) strategies, authorization-related strategies, and the like.
  • QoS quality of service
  • the policy control network element may be PCF.
  • future communications such as 6G, the policy control network element may still be PCF or have other names, which is not limited by this application.
  • the session management network element is a control plane network element provided by the operator's network and is responsible for managing the PDU session of the terminal.
  • the session management network element serves the PDU session of the terminal.
  • the PDU session is a channel used to transmit PDUs, and the terminal needs to transmit PDUs to each other through the PDU session and the DN.
  • SMF is responsible for the establishment, maintenance and deletion of PDU sessions.
  • SMF includes session management (such as session establishment, modification and release, including tunnel maintenance between UPF and RAN), UPF selection and control, service and session continuity (SSC) mode selection, roaming and other session related Function.
  • SMF can be used to select the UPF that serves the user, such as selecting the UPF that is closer to the base station where the user is located, to reduce the user's packet sending and receiving delay.
  • the session management network element may be SMF.
  • the session management network element may still be SMF or have other names, which is not limited by this application.
  • the user plane network element is mainly responsible for the forwarding of user data.
  • the user plane network element may be UPF.
  • future communications such as 6G, the user plane network element may still be UPF or have other names, which is not limited by this application.
  • the data management network element stores the user's subscription data, such as the QoS data of the user's subscription, which is used to provide data storage and query functions.
  • the data management network element may be UDM.
  • future communications such as 6G, the data management network element may still be UDM or have other names, which is not limited by this application.
  • the above application function network elements can be used to select, reselect, locate, and relocate the application server (application service, AS) of the application, and interact with the core network.
  • the application function network element may be AF.
  • future communications such as 6G, the application function network element may still be AF or have other names, which is not limited by this application.
  • the access network elements can be used to support the UE's access to 5G and CN, as well as for the transmission of business data.
  • the access network element may be RAN.
  • future communications such as 6G, the access network element may still be RAN or have other names, which is not limited in this application.
  • an embodiment of the present application provides a communication method to improve the efficiency of UE registration with the network.
  • the communication method may be executed by the UE and the network device.
  • the network device may be a mobility management network element or a device or a network element that has the function of a mobility management network element.
  • the network device may be the AMF shown in FIG. 1.
  • the communication method provided by the embodiment of the present application may include the following steps:
  • the UE receives at least one rejected network slice information and first indication information from the AMF.
  • the AMF is deployed in the first PLMN.
  • Information about rejected network slices can include rejected NSSAI.
  • the UE keeps (keep) the information of the rejected network slice associated with the first PLMN after the first PLMN enters the deregistration state according to the first indication information.
  • the unregistered state refers to a state in which the UE is not registered in any PLMN, the 5GMM context is not established, the location of the UE is unknown to the network device, and the UE is not reachable to the network device.
  • the UE after the UE enters the deregistration state for the first PLMN, it retains the information of the rejected network slices associated with the first PLMN.
  • the information of the rejected network slice associated with the first PLMN includes the information of the rejected network slice indicated by the AMF in the process of the UE requesting to register with the first PLMN (including but not limited to at least the network slice from the AMF in S101).
  • a rejected network slice information includes: after the UE registers with the first PLMN, the information of the rejected network slices indicated by the AMF before the first PLMN goes to register.
  • the first indication information may be used to instruct the UE to retain the information of the rejected network slice associated with the first PLMN after the first PLMN enters the de-registration state.
  • the UE may reserve the information of the rejected network slice associated with the first PLMN after the first PLMN enters the de-registered state by default. That is, the first indication information may not directly indicate that the UE retains the information of the rejected network slice associated with the first PLMN after the first PLMN enters the de-registered state, or may indicate other content, but the UE After receiving the first indication information, after the first PLMN enters the de-registration state, the information of the rejected network slice associated with the first PLMN is retained.
  • the UE can still retain the rejected network slice information associated with the first PLMN after the UE enters the deregistered state from the first PLMN according to the first indication information, so as to learn which network slice information is the rejected network
  • the sliced information can avoid repeated requests for registration based on the rejected network slice information, so as to improve registration efficiency.
  • the UE may delete the rejected network slice information associated with the first PLMN after selecting from the first PLMN to a PLMN other than the first PLMN. Therefore, when the UE requests registration in the first PLMN, it will not The information of the rejected network slice associated with the first PLMN is selected as the requested NSSAI.
  • the UE may receive a first registration rejection message from the AMF, and the first registration rejection message may carry information of at least one rejected network slice and the first indication information.
  • the first registration rejection message may be sent by the AMF after receiving the first registration request message from the UE, and is used to instruct the AMF to reject the first registration request message.
  • the first registration request message may include at least one network slice information, such as at least one requested NSSAI, each NSSAI may provide at least one S-NSSAI, and each S-NSSAI indicates one network slice.
  • the AMF determines that none of the network slices indicated by the S-NSSAI included in the requested NSSAI in the first registration request message is available, it can send a first registration rejection message, where the cause value in the first registration rejection message ) Information element (IE) can be configured as "#62"no network slices available"".
  • IE Information element
  • the first registration rejection message may also carry information about at least one rejected network slice (for example, it carries rejected NSSAI, which is used to indicate at least one S-NSSAI), and the information about at least one rejected network slice may be carried in one or more IE.
  • the first registration rejection message may also carry first indication information, and the first indication information may be carried in one IE.
  • the first registration request message may not carry the information of the rejected network slice.
  • the UE receives a registration rejection message with a reason value of "#62"No network slice available"", it defaults to the first registration sent before.
  • the network slice information carried in the request message is the rejected network slice information. It should be understood that, in this example, the UE may use the network slice information carried in the first registration request message previously sent as the network slice information that is rejected because it is not available in the first PLMN, and because the terminal is located Any one of the information of the network slices that are not available in the registration area of the network slice that is rejected, or the information of the network slices that are rejected because of the verification and authorization failure or revocation of the network slice.
  • the UE may receive a first de-registration request (de-registration request) message from the AMF, and the first de-registration request message may carry information about at least one rejected network slice and The first indication information.
  • the first de-registration request message may be sent by the AMF after the UE is registered to the first PLMN, and is used to instruct the UE to perform de-registration in the first PLMN.
  • the reason why the AMF sends the first de-registration request message may be that the subscription data of the UE is changed and the network slice-specific authentication and authorization (network slice-specific authentication and authorization, NSSAA) fails, and so on.
  • the reason value IE in the first deregistration request message may be configured as "#62"No network slices available"".
  • the first indication information may be the re-registration indication information in the first de-registration request message.
  • the re-registration indication information may be used to indicate that the UE needs to initiate re-registration of the first PLMN after the first PLMN enters the de-registration state.
  • the rejected network slice information associated with the first PLMN in S102 includes but is not limited to the information of at least one rejected network slice shown in S101.
  • the UE receives multiple rejected network slice information from the AMF multiple times, where the information of at least one rejected network slice shown in S101 is part of the information of the multiple rejected network slices. Then the rejected network slice information associated with the first PLMN includes the information of the multiple rejected network slices.
  • the UE may delete the stored information of the rejected network slice associated with the first PLMN according to the indication information.
  • the sixth indication information may be used to indicate that the UE does not need to re-register, or to indicate that the UE does not need to initiate re-registration of the first PLMN, so the UE will not repeatedly request registration to a network slice that has been rejected in the first PLMN.
  • the sixth indication information may be carried in the second de-registration request message.
  • the above re-registration instruction information and non-re-registration instruction information can occupy the same IE in the registration request message.
  • the IE is configured as "1”
  • the IE is the re-registration instruction information.
  • this IE is an indication of no re-registration.
  • the above rejected network slices may include network slices rejected because they are unavailable in the first PLMN, network slices rejected because they are not available in the registration area where the terminal is located, or network slices rejected because they are not available in the first PLMN. At least one of the network slices that was rejected due to authentication and authorization failure or revocation.
  • the UE can learn the rejection reason of the rejected network slice according to the rejection reason information from the AMF, so as to know that the rejected network slice is the network slice rejected because it is not available in the first PLMN (The corresponding rejection reason is not available in the first PLMN), network slices that are rejected because they are not available in the registration area where the terminal is located (the corresponding rejection reason is not available in the registration area where the terminal is located), or Network slices that are rejected due to network slice verification and authorization failure or revocation (corresponding rejection reason is network slice verification and authorization failure or revocation).
  • the rejection reason information corresponds to the S-NSSAI, and is used to indicate that the rejection reason of the network slice corresponding to the S-NSSAI is: rejected because it is not available in the first PLMN, because it is in the registration area where the terminal is located Rejected due to unavailability of the network, or rejected due to failure or revocation of verification and authorization of the network slice.
  • the correspondence between the information of the rejected network slice and the reason for rejection shown in Table 1 can be a registration rejection message, registration acceptance (registration accept) message, configuration update request message or deregistration request message instruct.
  • the information of the rejected network slice and the reason for rejection are carried in the same registration request message or de-registration request message, or the information of the rejected network slice, the reason for rejection, and the information used to indicate the relationship between the two
  • the information of the corresponding relationship is carried in the same registration request message or de-registration request message.
  • the UE may store the rejected network slice information associated with the first PLMN as the rejection reason shown in Table 2.
  • identification 1 indicates that the reason for rejection is unavailable in the first PLMN
  • identification 2 indicates that the reason for rejection is unavailable in the registration area where the terminal is located
  • identification 3 indicates that the reason for rejection is that the verification and authorization of the network slice failed. Or revoke.
  • the UE may store the corresponding relationship shown in Table 2 as the information of the rejected network slice associated with the first PLMN.
  • the UE after the UE enters the de-registered state for the first PLMN, it retains the information of the network slices rejected because it is not available in the first PLMN, for example, retains S-NSSAI_1 and S-NSSAI_1 shown in Table 2. S-NSSAI_2.
  • the first indication information may be used to instruct the UE to retain information about the network slices that are rejected because they are not available in the first PLMN after entering the de-registered state.
  • the UE receives the first indication information by default, after entering the first PLMN and entering the de-registered state, the information of the network slices that are rejected due to being unavailable in the first PLMN is retained.
  • the UE After the UE enters the de-registration state for the first PLMN and determines that the registration area or tracking area where the UE resides has not changed, it retains the information of the network slices that are rejected because they are not available in the registration area where the terminal is located. , For example, keep S-NSSAI_3 and S-NSSAI_4 shown in Table 2. Among them, the registration area or tracking area where the UE resides has not changed, which means that the registration area where the UE is located has not changed after entering the de-registered state with the first PLMN and when the first registration request message is sent to initiate registration, or the UE is located After entering the de-registration state and sending the first registration request message to initiate registration, there is no change in the registration area of.
  • the registration area corresponds to at least one tracking area (in other words, the registration area is composed of at least one tracking area), and the UE does not need to perform mobility registration (ie location registration) when roaming in a certain registration area, in other words, move out of a certain registration area. Mobility registration needs to be performed after each registration area.
  • the tracking area is an area composed of at least one cell and is used to track the location of the UE.
  • the first indication information may be used to instruct the UE to reserve the network rejected because it is unavailable in the registration area where the terminal is located after entering the de-registration state and determining that the registration area or tracking area where the UE resides has not changed Slice information.
  • the UE may enter the de-registration state for the first PLMN by default, and after it is determined that the registration area or tracking area where the UE resides has not changed, the network slices that are rejected because they are not available in the registration area where the terminal is located are reserved. information.
  • the UE may send a second registration request message to the AMF, the second registration request The message does not include network slice information, or in other words, the second registration request message does not carry requested NSSAI.
  • the available network slice information set is specifically an available NSSAI set, including one or more S-NSSAIs.
  • the available NSSAI set includes the information of the network slice permitted by the first PLMN (that is, the allowed NSSAI corresponding to the first PLMN), the information of the network slice configured by the first PLMN (that is, the configured NSSAI corresponding to the first PLMN), and the network configured by default Slice information (ie default configured NSSAI).
  • the UE determines that all the S-NSSAIs in the available network slice information set belong to the rejected NSSAI, the UE sends the second registration request message.
  • the sending of the above second registration request message may be performed after the UE sends the first registration request message.
  • the UE carries the information of the network slice other than the information of the rejected network slice in the available network slice information set in the first registration request message, and sends the first registration request message to the AMF.
  • the UE receives An instruction from AMF (such as the first registration rejection message or the first de-registration request message)
  • AMF an instruction from AMF
  • the UE receives An instruction from AMF (such as the first registration rejection message or the first de-registration request message)
  • the network slice information in the first registration request message is rejected, that is, the network slice information in the network slice information set can be used.
  • the information is the information of the rejected network slice, and the UE may send the second registration request message to the AMF.
  • the UE can send the second registration request message to the AMF, and The first registration request message is no longer sent.
  • the AMF may send the second indication information to the UE.
  • the second indication information may be used to instruct the UE to disable N1 mode capability (disable N1 mode capability).
  • the UE may turn off the N1 mode capability according to the second indication information.
  • the UE no longer attempts to register on the 5G network, and the UE can request registration from a long term evolution (LTE) network, etc., so as to improve the efficiency of the UE's network registration.
  • LTE long term evolution
  • the UE will not re-enable the ability to try the N1 mode in a short period of time (for example, a time length defined by the UE itself).
  • LTE long term evolution
  • the AMF may send the third indication information to the UE.
  • the third indication information may be used to indicate that there is no available default network slice, where there is no available default network slice, for example, no default configured NSSAI, or default configured NSSAI is not available.
  • the UE may turn off the N1 mode capability according to the third indication information, and select from the first PLMN to the second PLMN.
  • the first PLMN and the second PLMN may be the same or different.
  • the UE may save the information of the first PLMN.
  • the information of the first PLMN may be the identity (ID) of the first PLMN.
  • the third indication information is abnormal case indication information, which is used to indicate that the current abnormal situation is present.
  • the UE may turn off the N1 mode capability and select from the first PLMN to the second PLMN after the number of times of receiving the third indication information reaches a threshold (for example, 5 times).
  • the number of times the third indication information is received here may refer to the number of times the UE has received the third indication information during the process of requesting to register with the first PLMN.
  • the UE may increase the count value of the counter of the third indication information (such as the registration attempt counter) each time after receiving the third indication information, and when the count of the counter reaches the threshold, The UE turns off the N1 mode capability and performs PLMN selection. Among them, when the UE is successfully registered (for example, the registration success message is introduced) or PLMN selection is performed, the UE sets the count value of the counter to zero.
  • the UE can also turn off the N1 mode capability after receiving the third indication information for the first time, and select from the first PLMN to the second PLMN, without determining whether the number of times the third indication information has been received reaches the threshold, and further improve the registration efficient.
  • the third indication information may also be used to instruct the UE to turn off the N1 mode capability.
  • the third indication information may also be used to instruct the UE to retain the information of the first PLMN after performing PLMN selection from the first PLMN.
  • the AMF may send fourth indication information to the UE.
  • the fourth indication information may be used to instruct the UE to perform PLMN selection.
  • the UE may select from the first PLMN to the second PLMN according to the fourth indication information.
  • the first PLMN and the second PLMN may be the same or different.
  • the UE may save the information of the first PLMN.
  • the fourth indication information may also be used to instruct the UE to retain the information of the first PLMN after performing PLMN selection from the first PLMN.
  • the information of the first PLMN may be the identity of the first PLMN.
  • the UE may retain the information of the first PLMN after selecting from the first PLMN to the second PLMN.
  • the information of the first PLMN can be used to identify whether the second PLMN is consistent with the first PLMN. After the UE recognizes that the first PLMN is consistent with the second PLMN, the first PLMN can turn off the N1 mode capability to avoid repeated requests for registration in the first PLMN, which can improve registration efficiency.
  • the foregoing third indication information or fourth indication information may also be used to instruct the UE to retain the information of the first PLMN after performing PLMN selection from the first PLMN.
  • the UE may receive the third indication information or the fourth indication information by default, and after selecting from the first PLMN to the second PLMN, the information of the first PLMN is retained.
  • the UE may also turn off the N1 mode capability and select from the first PLMN to the second PLMN after determining that the information of the network slice in the available network slice information set is all the information of the rejected network slice. After selecting the second PLMN, the UE may save the information of the first PLMN.
  • the UE when the UE selects from the first PLMN to the second PLMN, it may also select a PLMN that is different from the first PLMN as the second PLMN according to the information of the first PLMN, so as to avoid repeating requests for registration in the first PLMN.
  • the UE may store the information of the first PLMN in the first PLMN list, and the first PLMN list includes PLMNs with no available network slices, or in other words, there are no available networks among the PLMNs in the first PLMN list. slice. It should be understood that the first PLMN list is retained at least until the UE selects the second PLMN.
  • the UE may store the information of the PLMN that tried to register but failed to register in the first PLMN list.
  • the PLMN that fails to register here refers to a PLMN that cannot be registered because the information of the network slice in the available network slice information set corresponding to the PLMN is rejected.
  • the UE attempts to register in the third PLMN, and because the network slice information in the available network slice information set is rejected by the third PLMN, the UE performs PLMN selection, selects from the third PLMN to the first PLMN, and selects the third PLMN The information is stored in the first PLMN list.
  • the UE may determine the second PLMN according to the first PLMN list, where the second PLMN is not included in the first PLMN list.
  • the UE may determine the second PLMN from the PLMNs that are not included in the first PLMN list, so as to avoid re-selecting PLMNs with no available network slices and improve registration efficiency.
  • the UE When the UE selects a PLMN in the first PLMN list from the first PLMN, the UE can turn off the N1 mode capability to avoid repeated requests to register to the PLMN in the first PLMN list, which can improve registration efficiency.
  • the AMF may also send fifth indication information to the UE, which is used to indicate the information of at least one network slice, and the at least one network slice.
  • the information can be referred to as steering network slice information or other names.
  • the information for guiding the network slice is a network slice that is determined by the AMF according to the slice type (Slice/Service type) and is the same as the type of the network slice that the UE requests to register.
  • the fifth indication information may include at least one guided NSSAI, each guided NSSAI includes at least one guided S-NSSAI, and the number of guided S-NSSAIs does not exceed the number of requested S-NSSAIs carried in the first registration request message.
  • the UE may send a third registration request message to the AMF, which carries at least one S-NSSAI included in the guided NSSAI, and is used to request registration to the network slice indicated by the at least one S-NSSAI.
  • the AMF may send fifth indication information to the UE to instruct the UE to initiate registration by guiding the network slice information, so as to improve registration efficiency.
  • the AMF may also carry the fifth indication information and the information of the at least one rejected network slice shown in S101 and the first indication information in the same message, such as the first registration rejection message or the first deregistration message. Request message.
  • a communication method provided in an embodiment of the present application may include the following steps:
  • S201 The UE sends a first registration request message to the AMF.
  • the requested NSSAI includes multiple S-NSSAIs, and the AMF determines that none of the multiple S-NSSAIs provided by the requested NSSAI are available, then the following steps S202-S204 are executed.
  • the requested NSSAI may include S-NSSAI in allowed NSSAI, configured NSSAI, and/or default configured NSSAI.
  • the AMF determines that there is no S-NSSAI with the default configuration available for the UE, the following steps S205-S206 are executed.
  • the AMF can determine that there is no S-NSSAI with the default configuration available for the UE; or, the UE does not support network-specific slice authentication and authorization.
  • the default subscription S-NSSAI is configured on the network side, all default subscription S-NSSAIs require network-specific slice verification and authorization. Since the UE does not support network-specific slice verification and authorization, AMF can determine that there is no such UE S-NSSAI with default configuration available.
  • S202 The AMF sends a registration rejection message to the UE.
  • the registration rejection message carries the reason value configured as "#62"No network slices available"", rejected NSSAI IE, and first indication information.
  • the rejected NSSAI IE is used to carry the rejected NSSAI
  • the first indication information is used to indicate that the rejected NSSAI carried in the rejected NSSAI IE needs to be saved.
  • S203 The UE stores the rejected NSSAI.
  • the UE can continue to try to register in the first PLMN. If the PLMN selection conditions are met, for example, the number of times the UE has received the third indication information reaches the threshold, or the PLMN selection indication information from the AMF is received, the UE may perform PLMN selection . After the UE performs PLMN selection, the UE will delete the rejected NSSAI.
  • S204 The UE sends a second registration request message to the AMF.
  • the second registration request message sent by the UE to the AMF does not include network slice information, or in other words, the second registration request message does not Carrying the requested NSSAI
  • the AMF determines that there is no S-NSSAI with the default configuration available for the UE according to the second registration request message, the above steps S204-S205 can be performed. If it is determined that the available NSSAI set includes the non-rejected S-NSSAI, the second registration request message sent by the UE to the AMF includes the non-rejected S-NSSAI to request registration to the non-rejected network slice.
  • the available NSSAIs in the NSSAI set include allowed NSSAI and configured NSSAI.
  • the non-rejected S-NSSAI does not belong to the rejected NSSAI.
  • the AMF determines that there is no S-NSSAI with a default configuration available for the UE, and then sends third indication information to the UE.
  • the third indication information is abnormal situation indication information.
  • S206 If the UE determines that the number of times of receiving the third indication information reaches the threshold (5 times), the UE turns off the N1 mode capability to perform PLMN selection. Otherwise, if the UE determines that the number of times the third indication information has been received has not reached the threshold, the UE continues to try to register in the first PLMN, for example, the UE performs S204 again.
  • the UE can determine the rejected NSSAI. If the UE determines that there is no S-NSSAI available in allowed NSSAI and configured NSSAI (such as allowed NSSAI and configured NSSAI, all S-NSSAIs are included in rejected NSSAI, or allowed NSSAI and configured NSSAI do not have S-NSSAI), then the UE The registration request sent when requesting registration does not carry the requested NSSAI.
  • allowed NSSAI and configured NSSAI such as allowed NSSAI and configured NSSAI, all S-NSSAIs are included in rejected NSSAI, or allowed NSSAI and configured NSSAI do not have S-NSSAI
  • the AMF can accept registration and provide new configured NSSAI, or the AMF can reject it and indicate to the UE that an abnormal situation has occurred.
  • the UE closes the N1 mode capability, switches to the S1 mode, performs PLMN reselection, and deletes the saved rejected NSSAI information.
  • a communication method provided by an embodiment of the present application may include the following steps:
  • S301 The UE sends a first registration request message to the AMF.
  • the requested NSSAI may include S-NSSAI in allowed NSSAI, configured NSSAI, and/or default configured NSSAI.
  • the AMF determines that there is no S-NSSAI with the default configuration available for the UE, the following steps S305-S306 are executed.
  • the AMF sends a registration rejection message to the UE.
  • the registration rejection message carries the reason value configured as "#62"No network slices available"", rejected NSSAI IE, and first indication information.
  • the rejected NSSAI IE is used to carry rejected NSSAI
  • the first indication information is used to indicate that the rejected NSSAI carried in the rejected NSSAI IE needs to be stored.
  • S303 The UE stores the rejected NSSAI. After that, the UE continues to try to register in the first PLMN.
  • the UE After the UE performs PLMN selection, the UE will delete the rejected NSSAI.
  • S304 The UE sends a second registration request message to the AMF.
  • the second registration request message sent by the UE to the AMF does not include network slice information, or in other words, the second registration request message does not Carrying the requested NSSAI
  • the AMF determines that there is no S-NSSAI with the default configuration available for the UE according to the second registration request message, steps S305-S306 can be performed. If the UE determines that the available NSSAI set includes the non-rejected S-NSSAI, the second registration request message sent by the UE to the AMF includes the non-rejected S-NSSAI to request registration to the non-rejected network slice.
  • S305 The AMF determines that there is no S-NSSAI with the default configuration available for the UE, and then sends third indication information to the UE.
  • the third indication information is abnormal situation indication information.
  • S306 The UE turns off the N1 mode capability according to the third indication information, and performs PLMN selection.
  • the UE can determine the rejected NSSAI. If the UE determines that there is no S-NSSAI available in allowed NSSAI and configured NSSAI, the registration request sent by the UE when requesting registration does not carry the requested NSSAI. After that, AMF can accept registration and provide new configured NSSAI, or AMF can reject it and send it to The UE indicates that an abnormal situation has occurred. When an abnormal situation occurs, the UE closes the N1 mode capability, switches to the S1 mode, performs PLMN reselection, and deletes the saved rejected NSSAI information.
  • the AMF may also provide a guided NSSAI to the UE, and the UE initiates a registration request according to at least one S-NSSAI in the guided NSSAI to improve registration efficiency.
  • a communication method provided by an embodiment of the present application may include the following steps:
  • S401 The UE sends a first registration request message to the AMF.
  • the requested NSSAI may include S-NSSAI in allowed NSSAI, configured NSSAI, and/or default configured NSSAI.
  • the AMF determines that there is no S-NSSAI with the default configuration available for the UE, the following steps S408-S409 are executed.
  • the AMF determines at least one guided NSSAI according to the requested NSSAI, and each guided NSSAI includes at least one guided S-NSSAI.
  • the type of the network slice indicated by the bootstrap S-NSSAI is the same as the type of the network slice indicated by the requested NSSAI.
  • the AMF sends a registration rejection message to the UE.
  • the registration rejection message includes a guided NSSAI IE, which is used to carry at least one guided NSSAI.
  • the registration rejection message carries the reason value configured as "#62"No network slices available"", rejected NSSAI IE, and first indication information.
  • the rejected NSSAI IE is used to carry rejected NSSAI
  • the first indication information is used to indicate that the rejected NSSAI carried in the rejected NSSAI IE needs to be saved.
  • S404 The UE stores the rejected NSSAI. After that, the UE continues to try to register in the first PLMN.
  • the UE After the UE performs PLMN selection, the UE will delete the rejected NSSAI.
  • S405 The UE adds a guided S-NSSAI to the allowed NSSAI.
  • the UE may replace the S-NSSAI belonging to the rejected NSSAI in the allowed NSSAI with the guided S-NSSAI.
  • the UE determines that the S-NSSAI belongs to rejected NSSAI.
  • the UE sends a third registration request message to the AMF, where the third registration request message includes at least one information for guiding the S-NSSAI.
  • the UE may perform S407. For example, the UE executes S407 after receiving a registration rejection message with a rejection reason of "#62"No network slices available"" for the third registration request message.
  • the AMF may send a registration acceptance message to the UE to indicate successful registration to the network slice corresponding to the guided NSSAI, and S407 is not executed any more.
  • S407 The UE sends a second registration request message to the AMF.
  • the second registration request message sent by the UE to the AMF does not include network slice information, or in other words, the second registration request message does not Carrying the requested NSSAI
  • the AMF determines that there is no S-NSSAI with the default configuration available for the UE according to the second registration request message, steps S408-S409 may be performed. If the UE determines that the available NSSAI set includes the non-rejected S-NSSAI, the second registration request message sent by the UE to the AMF includes the non-rejected S-NSSAI to request registration to the non-rejected network slice.
  • the available NSSAIs in the NSSAI set include allowed NSSAI and configured NSSAI.
  • the non-rejected NSSAI refers to the NSSAI other than the rejected NSSAI stored by the UE.
  • the AMF sends third indication information to the UE.
  • the third indication information is abnormal situation indication information.
  • S409 The UE turns off the N1 mode capability according to the third indication information, and performs PLMN selection.
  • the UE can determine the rejected NSSAI.
  • the AMF can provide the UE with a guided S-NASSI, and the UE will use the guided S-NASSI as the allowed S-NASSI in the NSSAI, and request registration based on the guided S-NASSI first. If the UE still judges that there is no S-NSSAI available in allowed NSSAI and configured NSSAI, the registration request sent by the UE when requesting registration does not carry the requested NSSAI.
  • AMF can accept registration and provide new configured NSSAI, or AMF can reject and Indicates to the UE that an abnormal situation has occurred.
  • the UE closes the N1 mode capability, switches to the S1 mode, performs PLMN reselection, and deletes the saved rejected NSSAI information.
  • a communication method provided by an embodiment of the present application may include the following steps:
  • S501 The UE sends a first registration request message to the AMF.
  • the AMF determines that none of the multiple S-NSSAIs provided by the requested NSSAI are available, then the following steps S502-S505 are executed.
  • the AMF determines that there is no S-NSSAI with the default configuration available for the UE, the following steps S507-S508 are executed.
  • the AMF sends a registration rejection message to the UE.
  • the registration rejection message carries the reason value configured as "#62"No network slices available"", rejected NSSAI IE, and first indication information.
  • the rejected NSSAI IE is used to carry rejected NSSAI
  • the first indication information is used to indicate that the rejected NSSAI carried in the rejected NSSAI IE needs to be stored.
  • S503 The UE stores the rejected NSSAI. After that, the UE continues to try to register in the first PLMN.
  • the UE After the UE performs PLMN selection, the UE will delete the rejected NSSAI.
  • S504-S505 are executed. If the UE determines that the available NSSAI set includes non-rejected S-NSSAI, S506 is executed.
  • S504 The UE selects from the first PLMN to the second PLMN, and retains the information of the first PLMN after the PLMN is selected.
  • the UE can successfully register the second PLMN in the N1 mode, or after the UE turns off the N1 mode, or In the N1 mode, after the UE selects from the second PLMN to another PLMN (may be referred to as the third PLMN), the information of the first PLMN is deleted.
  • the UE can successfully register a certain PLMN in the N1 mode, or delete the first PLMN after the UE turns off the N1 mode List.
  • S505 If the UE determines that the second PLMN is the same as the first PLMN according to the information of the first PLMN, the UE turns off the N1 mode capability, or the UE sends a second registration request message to the AMF, and the second registration request message does not include NSSAI, or That is, the second registration request message does not carry the requested NSSAI. If the AMF determines that there is no S-NSSAI with the default configuration available for the UE according to the second registration request message, S507-S508 can be executed.
  • the second registration request message sent by the UE to the AMF includes the non-rejected S-NSSAI to request registration to the non-rejected network slice. If the AMF determines that the S-NSSAI provided by the second registration request message is not available, steps S502-S505 are executed.
  • the available NSSAIs in the NSSAI set include allowed NSSAI and configured NSSAI.
  • the non-rejected NSSAI refers to the NSSAI other than the rejected NSSAI stored by the UE.
  • the AMF sends third indication information to the UE.
  • the third indication information is abnormal situation indication information.
  • S508 The UE turns off the N1 mode capability according to the third indication information, and performs PLMN selection.
  • the UE can determine the rejected NSSAI. If the UE determines that there is no S-NSSAI available in allowed NSSAI and configured NSSAI, the registration request sent by the UE when requesting registration does not carry the requested NSSAI. After that, AMF can accept registration and provide new configured NSSAI, or AMF can reject it and send it to The UE indicates that an abnormal situation has occurred.
  • the UE When an abnormal situation occurs, the UE closes the N1 mode capability, switches to the S1 mode, performs PLMN reselection, and deletes the saved rejected NSSAI information. In addition, since the UE still stores the information of the first PLMN after performing PLMN reselection, the UE can turn off the N1 mode capability after selecting the first PLMN again, or do not carry network slice information in the registration request message to avoid Repeated registration attempts in the first PLMN.
  • the registration rejection message sent by the AMF according to the first registration request may not carry the rejected NSSAI, and the UE uses the S-NSSAI carried in the first registration request as the rejected NSSAI.
  • a communication method provided by an embodiment of the present application may include the following steps:
  • S601 The UE sends a first registration request message to the AMF.
  • the AMF determines that none of the multiple S-NSSAIs provided by the requested NSSAI are available, then the following steps S302-S304 are executed.
  • the AMF determines that there is no S-NSSAI with the default configuration available for the UE, the following steps S605-S606 are executed.
  • the AMF sends a registration rejection message to the UE.
  • the registration rejection message carries the reason value configured as "#62"No network slices available"" and the first indication information.
  • the first indication information is used to indicate that the rejected NSSAI needs to be saved.
  • the registration rejection message may carry rejected NSSAI IE.
  • the rejected NSSAI IE is used to carry rejected NSSAI, including at least one S-NSSAI, or the UE may default that the S-NSSAI carried in the first registration request message belongs to rejected NSSAI.
  • the reason for rejection of the requested NSSAI is by default that it is unavailable in the registration area where the terminal is located, because it is unavailable in the first PLMN, or the verification and authorization of the network slice fails or is revoked.
  • S603 The UE stores the rejected NSSAI. After that, the UE continues to try to register in the first PLMN.
  • the UE After the UE performs PLMN selection, the UE will delete the rejected NSSAI.
  • S604 The UE sends a second registration request message to the AMF.
  • the UE determines that all S-NSSAIs in the available NSSAI set belong to rejected NSSAIs, the UE sends a second registration request message to AMF.
  • the second registration request message does not include network slice information, or in other words, the second registration request message.
  • the registration request message does not carry the requested NSSAI. If the AMF determines that there is no S-NSSAI with the default configuration available for the UE according to the second registration request message, steps S605-S606 can be performed.
  • the second registration request message sent by the UE to the AMF includes the non-rejected S-NSSAI to request registration to the non-rejected network slice.
  • the available NSSAIs in the NSSAI set include allowed NSSAI and configured NSSAI.
  • the non-rejected NSSAI refers to the NSSAI other than the rejected NSSAI stored by the UE.
  • the AMF sends third indication information to the UE.
  • the third indication information is abnormal situation indication information.
  • S606 The UE turns off the N1 mode capability according to the third indication information to perform PLMN selection.
  • the UE can determine the rejected NSSAI.
  • the rejected NSSAI is indicated by the AMF, or, after the UE receives the registration and message, it uses the requested NSSAI carried in the previous registration request message as the rejected NSSAI.
  • the method and method flow provided in the embodiments of the present application are introduced from the perspective of the functions implemented by the UE and the AMF.
  • the UE and the AMF may include a hardware structure and/or a software module, and the above functions are implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether a certain function among the above-mentioned functions is executed by a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
  • a communication device may include a communication module 801 and a processing module 802, and the communication module 801 and the processing module 802 are coupled with each other.
  • the communication device 800 can be used to perform the steps performed by the UE or the AMF shown in FIGS. 2-7 above.
  • the communication module 801 can be used to support the communication device 800 to communicate.
  • the communication module 801 can also be called a communication unit, a communication interface, a transceiver module or a transceiver unit.
  • the communication module 801 may have a wireless communication function, such as being able to communicate with other communication devices through wireless communication.
  • the processing module 802 can also be referred to as a processing unit, and can be used to support the communication device 800 to perform the processing actions of the session management network element in the above method embodiment, including but not limited to: generating information and messages sent by the communication module 801, and/ Or, demodulate and decode the signal received by the communication module 801 and so on.
  • the communication module 801 may be used to receive at least one rejected network slice information and first indication information from a network device that is deployed in the first PLMN.
  • the processing module 802 may be configured to retain the information of the rejected network slice associated with the first PLMN after the communication device 800 enters the de-registered state for the first PLMN according to the first indication information.
  • the communication module 801 may receive a first registration rejection message from a network device, the first registration rejection message is used to indicate that the first registration request message is rejected, and the first registration rejection message may carry the at least one registered rejection message.
  • the information of the rejected network slice and the first indication information may be received from a network device, the first registration rejection message is used to indicate that the first registration request message is rejected, and the first registration rejection message may carry the at least one registered rejection message.
  • the communication module 801 may receive a first de-registration request message from the network device, where the first de-registration request message is used to instruct the communication device 800 to perform de-registration in the first PLMN.
  • the first deregistration request message may carry the information of the at least one rejected network slice and the first indication information.
  • the first indication information may be the re-registration indication information in the first de-registration request message.
  • the above rejected network slices may include network slices rejected because they are not available in the first PLMN, and rejected because they are not available in the registration area where the communication device 800 is located.
  • the processing module 802 may retain the information of the network slices that are rejected due to being unavailable in the first PLMN after the communication device 800 enters the de-registered state for the first PLMN.
  • the processing module 802 may be in the unregistered state of the first PLMN by the communication device 800, and after it is determined that the registration area or the tracking area where the communication device 800 resides has not changed, the processing module 802 may retain the information on the communication device 800. Information about network slices that are not available and rejected in the registration area where they are located.
  • the processing module 802 determines that the network slice information in the available network slice information set is the information of the rejected network slice, and the communication module 801 may send a second registration request message to the network device. 2.
  • the registration request message does not include network slice information, in other words, the second registration request message does not carry requested NSSAI.
  • the available network slice information set includes information of network slices permitted by the first PLMN, information of network slices configured by the first PLMN, and information of network slices configured by default.
  • the available network slice information set may include allowed NSSAI, configured NSSAI, and default configured NSSAI. Allowed NSSAI and configured NSSAI can be indicated by the network device.
  • the processing module 802 may determine that the information of the network slice in the available network slice information set is all included in the information of the rejected network slice associated with the first PLMN.
  • the communication module 801 may receive second indication information from the network device, and the second indication information may be used to instruct the communication device 800 to turn off the N1 mode capability, and the processing module 802 may turn off according to the second indication information. N1 mode capability.
  • the communication module 801 may receive the third indication information from the network device, and the third indication information is used to indicate that no default network slice is available, and the processing module 802 may close N1 according to the third indication information. Mode capability, and select from the first PLMN to the second PLMN.
  • the processing module 802 may turn off the N1 mode capability after the communication module 801 receives the third indication information for the first time, and select the first PLMN to the second PLMN, or the processing module 802 may determine that the communication module 801 receives the first PLMN. After the number of three indication messages reaches the threshold (for example, 5 times), the N1 mode capability is turned off, and the first PLMN is selected to the second PLMN.
  • the UE may receive fourth indication information from the network device, where the fourth indication information is used to instruct the communication device 800 to perform PLMN selection. Then the processing module 802 can select from the first PLMN to the second PLMN according to the fourth indication information.
  • the processing module 802 may determine the second PLMN according to the information of the first PLMN, and the first PLMN is different from the second PLMN. To avoid repeating the registration request in the first PLMN.
  • the processing module 802 retains the information of the first PLMN after selecting from the first PLMN to the second PLMN.
  • the processing module 802 may store the information of the first PLMN in the first PLMN list.
  • the first PLMN list includes PLMNs with no available network slices. In other words, there are no available network slices for the PLMN in the first PLMN list.
  • the processing module 802 may determine the second PLMN according to the first PLMN list, where the second PLMN is not included in the first PLMN list.
  • the processing module 802 determines that the first PLMN is the same as the second PLMN according to the information of the first PLMN, and the processing module 802 turns off the N1 mode capability.
  • the processing module 802 determines that the second PLMN is the PLMN in the first PLMN list according to the information of the first PLMN, or in other words, the processing module 802 determines that the first PLMN list includes the first PLMN according to the information of the first PLMN. For the second PLMN, the processing module 802 turns off the N1 mode capability.
  • the processing module 802 determines that the candidate PLMNs searched when the N1 mode capability is turned on belong to the first PLMN list, the processing module 802 turns off the N1 mode capability.
  • the communication module 801 may receive fifth indication information from the network device, and the fifth indication information may be used to indicate at least one piece of information for guiding the network slice.
  • the communication module 801 may send a third registration request message to the network device according to the information of the guiding network slicing, where the third registration request message includes at least one guiding network slicing information.
  • the communication module 801 may receive sixth indication information from the network device, the sixth indication information is used to indicate that the UE does not need to re-register, or to indicate that the UE does not need to re-register to the first PLMN . Then the processing module 802 may delete the information of the rejected network slice associated with the first PLMN.
  • the sixth indication information may be included in the second de-registration request message, which is used to instruct the UE to perform de-registration in the first PLMN, and the sixth indication information may specifically be non-re-registration indication information.
  • the above network equipment may include AMF.
  • the communication module 801 may send the information of at least one rejected network slice and the first indication information to the UE.
  • AMF is deployed in the first PLMN.
  • the first indication information may be used to instruct the UE to retain the rejected network slice information associated with the first PLMN after the first PLMN enters the de-registration state.
  • the communication module 801 may send a first registration rejection message or a first de-registration request message to the UE, and the first registration rejection message or the first de-registration request message includes at least one rejected network slice. Information and first instruction information.
  • the first registration rejection message is used to indicate that the first registration request message is rejected, and the first de-registration request message is used to instruct the UE to perform de-registration in the first PLMN.
  • the first indication information may be the re-registration indication information in the first de-registration request message.
  • the re-registration indication information may be used to indicate that the UE needs to re-register the first PLMN after performing de-registration in the first PLMN.
  • the first indication information is specifically used to indicate that after the UE enters the de-registered state in the first PLMN, it retains information about the network slices that are rejected due to being unavailable in the first PLMN.
  • the first indication information may specifically indicate that the UE is in the de-registered state in the first PLMN and the registration area or tracking area where the UE resides remains unchanged. Information about rejected network slices.
  • the communication module 801 may receive a second registration request message from a UE, the second registration request message does not include network slice information, or in other words, the second registration request message does not carry requested NSSAI .
  • the communication module 801 may send second indication information to the UE, the second indication information is used to instruct the UE to turn off the N1 mode capability; or, the communication module 801 may send third indication information to the UE, and the third indication information is used to indicate that there is no available
  • the default network slice and is used to instruct the UE to store the information of the first PLMN after the first PLMN performs PLMN selection; or, the communication module 801 sends fourth indication information to the UE, and the fourth indication information is used to instruct the UE to perform PLMN selection, and used to instruct the UE to store the information of the first PLMN after the first PLMN performs PLMN selection.
  • the communication module 801 may send fifth indication information to the UE, where the fifth indication information is used to indicate at least one boot network slice.
  • the communication module 801 may also receive a third registration request message from the UE, where the third registration request message is used to request access to at least one boot network slice.
  • the third registration request message may include at least one piece of information for guiding the network slice.
  • the communication module 801 may send sixth indication information to the UE, where the sixth indication information is used to indicate that the UE does not need to re-register, or to indicate that the UE does not need to re-register with the first PLMN.
  • the sixth indication information may also be used to instruct the UE to delete the rejected network slice information associated with the first PLMN.
  • the sixth indication information may be included in the second de-registration request message, which is used to instruct the UE to perform de-registration in the first PLMN, and the sixth indication information may specifically be non-re-registration indication information.
  • the communication device provided in the embodiment of the present application may also be composed of hardware components, such as a processor, a memory, or a transceiver, etc., to implement the UPF, the first UE, or the SMF in the present application. Function.
  • FIG. 9 only shows the structure required by the communication device 900 to perform the method shown in the present application, and the present application does not limit the communication device to be provided with more components.
  • the communication device 900 can be used to perform the steps performed by the AMF in the foregoing method embodiments.
  • the communication device 900 may include a communication interface 901, a memory 902, and a processor 903.
  • the communication interface 901 can be used for communication with a communication device, for example, for sending or receiving signals.
  • the memory 902 is coupled with the processor 903 and can be used to store programs and data necessary for the communication device 900 to implement various functions.
  • the processor 903 is configured to support the communication device 900 to perform the processing functions performed by the AMF in the foregoing method, such as determining to generate information and messages sent by the communication interface 901, and/or to demodulate and decode the signals received by the communication interface 901 and many more.
  • the above memory 902 and the processor 903 may be integrated or independent of each other.
  • the communication interface 901 may be a communication port, such as a communication port (or interface) used for communication between network elements.
  • the communication interface 901 may also be referred to as a transceiving unit or a communication unit.
  • the processor 903 can be implemented by a processing chip or a processing circuit.
  • the above communication interface 901 may be used to perform the steps performed by the communication module 801.
  • the processor 903 may be configured to execute the above steps executed by the processing module 802, and details are not described herein again.
  • the communication device 1000 may include a processor 1001, a memory 1002, and a transceiver 1003.
  • the communication device 1000 can be used to perform the steps performed by the UE in the above method embodiments.
  • the above processor 1001 can be used to process the communication protocol and communication data, and to control the first communication device, execute the software program, process the data of the software program, and so on.
  • the memory 1002 may be used to store programs and data, and the processor 1001 may execute the method executed by the first communication device in the embodiment of the present application based on the program.
  • the transceiver 1003 may include a radio frequency unit and an antenna.
  • the radio frequency unit can be used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals.
  • the antenna can be used to send and receive radio frequency signals in the form of electromagnetic waves.
  • the radio frequency unit can also be regarded as the transceiver 1003 only.
  • the communication device 1000 can include a processor 1001, a memory 1002, a transceiver 1003, and an antenna.
  • the communication device 1000 may also include an input and output device, such as a touch screen, a display screen, or a keyboard, etc., which can be used to receive data input by the user and output data to the user. It should be noted that some types of communication devices may not have input and output devices.
  • the processor 1001 can baseband processing the data to be sent and output the baseband signal to the radio frequency unit, and the radio frequency unit performs radio frequency processing on the baseband signal and passes the radio frequency signal through the antenna Send in the form of electromagnetic waves.
  • the radio frequency unit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1001, and the processor 1001 converts the baseband signal into data and applies the data to the baseband signal. To process.
  • the processor 1001 may be configured to execute the steps executed by the processing module 802 shown in FIG. 8.
  • the transceiver 1003 can be used to perform the steps performed by the communication module 801 shown in FIG. 8.
  • the communication device may include a processor, and the processor may call an external transceiver and/or memory to implement the above-mentioned functions or steps or operations.
  • the communication device may also include a memory, and the processor can call and execute a program stored in the memory to implement the above-mentioned functions or steps or operations.
  • the communication device may also include a processor and a transceiver (or a communication interface), and the processor calls and executes a program stored in an external memory to implement the above-mentioned functions or steps or operations.
  • the communication device may also include a processor, a memory, and a transceiver.
  • the embodiment of the present application also provides a computer-readable storage medium on which program instructions (or computer programs, instructions) are stored.
  • program instructions or computer programs, instructions
  • the The computer executes the operation performed by the UE or the AMF in the foregoing method embodiment and any one of the possible implementation manners of the method embodiment.
  • an embodiment of the present application also provides a communication method, which can be executed by the UE and the AMF.
  • the method may include the method shown in any one of FIGS. 2-7.
  • this application also provides a computer program product, including program instructions, which when called by a computer for execution, can make the computer implement any of the above method embodiments and method embodiments The operation performed by the UE or AMF in a possible implementation.
  • this application also provides a chip or chip system, which is coupled with a transceiver, and is used to implement the above method embodiment and any one of the possible implementation manners of the method embodiment. Operations performed by AMF.
  • the chip system may include the chip and components such as memory and communication interface.
  • the present application also provides a communication system that can be used to implement the foregoing method embodiment and operations performed by the UE or AMF in any possible implementation manner of the method embodiment.
  • the communication system has an architecture as shown in FIG. 1.
  • this application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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Abstract

Provided are a communication method and apparatus, which are used for improving the efficiency of a registration process of a user equipment (UE). In the present application, after a UE enters a deregistration state from a public land mobile network, the UE still reserves information of rejected network slices associated with the public land mobile network, so as to learn which items of information of network slices are information of the rejected network slices, and so can avoid making repeated registration requests according to the information of these rejected network slices, thereby improving the registration efficiency.

Description

一种通信方法及装置Communication method and device
相关申请的交叉引用Cross-references to related applications
本申请要求在2020年05月21日提交中国专利局、申请号为202010437539.9、申请名称为“一种通信方法及装置”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 the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 202010437539.9, and the application name is "a communication method and device" on May 21, 2020, the entire content of which is incorporated into this application by reference.
技术领域Technical field
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。This application relates to the field of communication technology, and in particular to a communication method and device.
背景技术Background technique
在目前的无线通信技术中，支持用户设备(UE)根据当前公共陆地移动网(public land mobile network，PLMN)准许的(allowed)网络切片选择辅助信息(network slice selection assistance information，NSSAI)、当前PLMN配置的网络切片选择辅助信息(configured NSSAI)和/或默认配置的网络切片选择辅助信息(default configured NSSAI)在当前PLMN发起注册。上述NSSAI中可包括至少一个单网络切片选择辅助信息(single NSSAI，S-NSSAI)，每个S-NSSAI可指示一个网络切片。In the current wireless communication technology, support user equipment (UE) according to the current public land mobile network (public land mobile network, PLMN) permitted (allowed) network slice selection assistance information (network slice selection assistance information, NSSAI), current PLMN The configured network slice selection assistance information (configured NSSAI) and/or the default configured network slice selection assistance information (default configured NSSAI) initiates registration in the current PLMN. The aforementioned NSSAI may include at least one single network slice selection auxiliary information (single NSSAI, S-NSSAI), and each S-NSSAI may indicate one network slice.
比如，UE可在注册请求(registration request)消息中携带请求的网络切片选择辅助信息(requested NSSAI)，用于请求注册到requested NSSAI所指示的网络切片，其中，requested NSSAI可以是allowed NSSAI、configured NSSAI和/或default configured NSSAI中的一个或多个S-NSSAI构成。此外，若UE接收到来自网络侧的指示，获知allowed NSSAI、configured NSSAI和/或default configured NSSAI中的S-NSSAI属于被拒绝的NSSAI(rejected NSSAI)，则UE在发起注册请求时不再选择属于被拒绝的NSSAI的S-NSSAI作为requested NSSAI。For example, the UE may carry the requested network slice selection assistance information (requested NSSAI) in the registration request message to request registration to the network slice indicated by the requested NSSAI, where the requested NSSAI may be allowed NSSAI, configured NSSAI And/or one or more S-NSSAIs in the default configured NSSAI. In addition, if the UE receives an instruction from the network side and learns that the S-NSSAI in allowed NSSAI, configured NSSAI, and/or default configured NSSAI belongs to the rejected NSSAI (rejected NSSAI), the UE will no longer choose to belong to the The S-NSSAI of the rejected NSSAI is regarded as the requested NSSAI.
然而对于处于去注册态(deregistered)的UE，是无法获知进入去注册态之前网络设备指示的被拒绝的NSSAI的，因此处于去注册态的UE在发起注册时仍可能选择此前网络侧指示的拒绝的S-NSSAI作为requested NSSAI，根据这些S-NSSAI请求注册的结果只能是被拒绝，导致UE注册过程效率降低。However, for a UE in the deregistered state, it is impossible to know the rejected NSSAI indicated by the network device before entering the deregistered state. Therefore, the UE in the deregistered state may still choose the rejection indicated by the network side when it initiates registration. The S-NSSAI is used as a requested NSSAI. According to these S-NSSAIs, the result of requesting registration can only be rejected, which reduces the efficiency of the UE registration process.
发明内容Summary of the invention
本申请提供一种通信方法及装置，用以提高UE注册过程的效率。The present application provides a communication method and device to improve the efficiency of the UE registration process.
第一方面，本申请实施例提供一种通信方法，该方法可以由UE执行，也可以由UE的部件(比如处理器、芯片或芯片***等)执行。In the first aspect, an embodiment of the present application provides a communication method, which may be executed by a UE or a component of the UE (such as a processor, a chip, or a chip system, etc.).
下面以执行主体为UE为例进行描述。根据该方法，UE可接收来自于网络设备的至少一个被拒绝的网络切片的信息和第一指示信息，该网络设备部署于第一PLMN(第一PLMN即UE当前请求注册的PLMN，也可被称为当前PLMN(current PLMN))。根据该第一指示信息，UE在该第一PLMN进入去注册态(enters state 5GMM-deregistered for the current PLMN)之后，保留与该第一PLMN相关联的被拒绝的网络切片的信息。The following description takes the UE as an example. According to this method, the UE can receive at least one rejected network slice information and first indication information from a network device deployed in the first PLMN (the first PLMN is the PLMN that the UE currently requests to register, or it can be Called the current PLMN (current PLMN)). According to the first indication information, after the first PLMN enters the deregistered state (enters state 5GMM-deregistered for the current PLMN), the UE retains the information of the rejected network slice associated with the first PLMN.
采用以上方式，UE可根据第一指示信息，在UE从第一PLMN进入去注册态后仍然 保留第一PLMN关联的被拒绝的网络切片的信息，以获知哪些网络切片的信息是被拒绝的网络切片的信息，可避免重复根据这些被拒绝的网络切片的信息请求注册，以提高注册效率。In the above manner, the UE can still retain the rejected network slice information associated with the first PLMN after the UE enters the deregistered state from the first PLMN according to the first indication information, so as to learn which network slice information is the rejected network The sliced information can avoid repeated requests for registration based on the rejected network slice information, so as to improve registration efficiency.
示例性的，UE可接收来自于网络设备的第一注册拒绝消息，该第一注册拒绝消息用于指示该第一注册请求消息被拒绝，该第一注册拒绝消息可承载该至少一个被拒绝的网络切片的信息以及该第一指示信息。Exemplarily, the UE may receive a first registration rejection message from a network device, the first registration rejection message is used to indicate that the first registration request message is rejected, and the first registration rejection message may carry the at least one rejected Network slice information and the first indication information.
或者，UE可接收来自于该网络设备的第一去注册请求消息，该第一去注册请求消息用于指示UE在该第一PLMN执行去注册。该第一去注册请求消息可承载该至少一个被拒绝的网络切片的信息以及该第一指示信息。其中，第一指示信息可以是第一去注册请求消息中的重新注册指示信息。Alternatively, the UE may receive a first de-registration request message from the network device, where the first de-registration request message is used to instruct the UE to perform de-registration in the first PLMN. The first deregistration request message may carry the information of the at least one rejected network slice and the first indication information. The first indication information may be the re-registration indication information in the first de-registration request message.
在一种可能的设计中，以上被拒绝的网络切片，可包括因在该第一PLMN内不可用而被拒绝的网络切片、因在该UE所在的注册区域内不可用而被拒绝的网络切片或者因网络切片的验证和授权失败或撤销而被拒绝的网络切片中的至少一个网络切片。In a possible design, the above rejected network slices may include network slices rejected because they are unavailable in the first PLMN, and network slices rejected because they are unavailable in the registration area where the UE is located. Or at least one of the network slices that was rejected due to the failure or revocation of authentication and authorization of the network slice.
在一种可能的设计中，UE可在对第一PLMN进入去注册态后，保留因在该第一PLMN内不可用而被拒绝的网络切片的信息。In a possible design, after the UE enters the de-registered state with the first PLMN, the information of the network slices that are rejected due to being unavailable in the first PLMN may be retained.
在一种可能的设计中，UE可在对第一PLMN进入去注册态，且确定UE驻留的注册区域或跟踪区域未发生变化后，保留因在该UE所在的注册区域内不可用而被拒绝的网络切片的信息。In a possible design, after the UE enters the de-registered state with the first PLMN and determines that the registration area or tracking area in which the UE resides has not changed, the reservation is unavailable in the registration area where the UE is located. Information about rejected network slices.
在一种可能的设计中，UE确定可用网络切片信息集合中的网络切片的信息均为被拒绝的网络切片的信息，则UE可向网络设备发送第二注册请求消息，该第二注册请求消息中不包括网络切片的信息，或者说，该第二注册请求消息中不携带requested NSSAI。其中，可用网络切片信息集合包括第一PLMN准许的网络切片的信息、第一PLMN配置的网络切片的信息以及默认配置的网络切片的信息。例如，可用网络切片信息集合可包括allowed NSSAI(或称为，当前PLMN(即第一PLMN)的allowed NSSAI(allowed NSSAI for the current PLMN))、configured NSSAI(或称为，当前PLMN的configured NSSAI(configured NSSAI for the current PLMN))以及default configured NSSAI。其中，allowed NSSAI for the current PLMN以及configured NSSAI for the current PLMN可由该网络设备指示。In a possible design, the UE determines that the information of the network slice in the available network slice information set is the information of the rejected network slice, then the UE may send a second registration request message to the network device, the second registration request message Does not include network slice information, or in other words, the second registration request message does not carry requested NSSAI. Wherein, the available network slice information set includes information of network slices permitted by the first PLMN, information of network slices configured by the first PLMN, and information of network slices configured by default. For example, the available network slice information set may include allowed NSSAI (or referred to as allowed NSSAI (allowed NSSAI for the current PLMN) of the current PLMN (i.e., the first PLMN), configured NSSAI (or referred to as the configured NSSAI of the current PLMN). configured NSSAI for the current PLMN)) and default configured NSSAI. Among them, allowed NSSAI for the current PLMN and configured NSSAI for the current PLMN can be indicated by the network device.
在一种可能的设计中，UE可确定可用网络切片信息集合中的网络切片的信息均包含在与第一PLMN相关联的被拒绝的网络切片的信息中。In a possible design, the UE may determine that the network slice information in the available network slice information set is all included in the rejected network slice information associated with the first PLMN.
在一种可能的设计中，UE可接收来自于网络设备的第二指示信息，该第二指示信息可用于指示UE关闭N1模式能力，则UE可根据第二指示信息关闭N1模式能力。In a possible design, the UE may receive second indication information from the network device, and the second indication information may be used to instruct the UE to turn off the N1 mode capability, and the UE may turn off the N1 mode capability according to the second indication information.
采用该设计，UE在确定可用网络切片信息集合中的网络切片的信息均为被拒绝的网络切片的信息并发送第二注册请求消息后，可根据第二指示信息关闭N1模式能力，因此在可用网络切片被拒绝的情况下，UE不再尝试注册到5G网络，此后UE可请求注册到长期演进(long term evolution，LTE)等网络，以提高注册效率。With this design, after the UE determines that the information of the network slice in the available network slice information set is the information of the rejected network slice and sends the second registration request message, it can turn off the N1 mode capability according to the second indication information. When the network slice is rejected, the UE no longer attempts to register to the 5G network. After that, the UE may request to register to a long-term evolution (LTE) network to improve registration efficiency.
在一种可能的设计中，UE可接收来自于网络设备的第三指示信息，该第三指示信息用于指示无可用的默认网络切片，则UE可根据第三指示信息关闭N1模式能力，并从第一PLMN选择至第二PLMN。其中，UE可在第一次接收到第三指示信息后，关闭N1模式能力，并从第一PLMN选择至第二PLMN，或者，UE在确定接收到第三指示信息的次数达到阈值(如5次)后，关闭N1模式能力，并从第一PLMN选择至第二PLMN。In a possible design, the UE may receive third indication information from the network device, and the third indication information is used to indicate that no default network slice is available, and the UE may turn off the N1 mode capability according to the third indication information, and Select from the first PLMN to the second PLMN. Among them, the UE may turn off the N1 mode capability after receiving the third indication information for the first time, and select from the first PLMN to the second PLMN, or the UE may determine that the number of times the third indication information has been received reaches a threshold (such as 5 After), turn off the N1 mode capability, and select from the first PLMN to the second PLMN.
采用该设计，UE在确定可用网络切片信息集合中的网络切片的信息均为被拒绝的网络切片的信息并发送第二注册请求消息后，可根据第三指示信息关闭N1模式能力，并执行PLMN选择，不再尝试注册到第一PLMN而在尝试注册至其他PLMN，以提高注册效率。With this design, after the UE determines that the information of the network slice in the available network slice information set is the information of the rejected network slice and sends the second registration request message, it can turn off the N1 mode capability according to the third instruction information and execute the PLMN Choose not to try to register to the first PLMN but to try to register to other PLMNs to improve registration efficiency.
在一种可能的设计中，UE可接收来自于网络设备的第四指示信息，该第四指示信息用于指示UE执行PLMN选择。则UE可根据第四指示信息，从第一PLMN选择至第二PLMN。In a possible design, the UE may receive fourth indication information from the network device, where the fourth indication information is used to instruct the UE to perform PLMN selection. Then the UE can select from the first PLMN to the second PLMN according to the fourth indication information.
采用该设计，UE在确定可用网络切片信息集合中的网络切片的信息均为被拒绝的网络切片的信息并发送第二注册请求消息后，可根据第四指示信息关闭N1模式能力，并执行PLMN选择，不再尝试注册到第一PLMN而在尝试注册至其他PLMN，以提高注册效率。With this design, after the UE determines that the network slice information in the available network slice information set is the information of the rejected network slice and sends the second registration request message, it can turn off the N1 mode capability according to the fourth instruction information, and execute PLMN Choose not to try to register to the first PLMN but to try to register to other PLMNs to improve registration efficiency.
在一种可能的设计中，UE在从第一PLMN选择至第二PLMN后，保留第一PLMN的信息。In a possible design, the UE retains the information of the first PLMN after selecting from the first PLMN to the second PLMN.
采用该设计，UE在从第一PLMN选择至第二PLMN后，仍然保留第一PLMN的信息，因此能够识别第二PLMN是否仍是第一PLMN(或者此前选择过但注册失败的其他PLMN)。With this design, after the UE selects from the first PLMN to the second PLMN, it still retains the information of the first PLMN, so it can identify whether the second PLMN is still the first PLMN (or other PLMNs that were previously selected but failed to register).
在一种可能的设计中，UE从第一PLMN选择至第二PLMN，且第一PLMN与第二PLMN不同，以避免重复在第一PLMN请求注册。In a possible design, the UE selects from the first PLMN to the second PLMN, and the first PLMN is different from the second PLMN, so as to avoid repeating requests for registration in the first PLMN.
在一种可能的设计中，UE可将第一PLMN的信息存储至第一PLMN列表中。该第一PLMN列表包括没有可用网络切片的PLMN。或者说，第一PLMN列表中的PLMN没有可用网络切片。In a possible design, the UE may store the information of the first PLMN in the first PLMN list. The first PLMN list includes PLMNs with no available network slices. In other words, there are no available network slices for the PLMN in the first PLMN list.
在一种可能的设计中，UE可根据第一PLMN列表确定该第二PLMN，其中，第二PLMN不包括在第一PLMN列表中。或者说，UE可从不包括在第一PLMN列表的PLMN中确定第二PLMN，以避免再次选择到没有可用网络切片的PLMN，提高注册效率。In a possible design, the UE may determine the second PLMN according to the first PLMN list, where the second PLMN is not included in the first PLMN list. In other words, the UE may determine the second PLMN from the PLMNs that are not included in the first PLMN list, so as to avoid re-selecting PLMNs with no available network slices and improve registration efficiency.
在一种可能的设计中，UE根据第一PLMN的信息确定第一PLMN与第二PLMN相同，则UE关闭N1模式能力。In a possible design, the UE determines that the first PLMN is the same as the second PLMN according to the information of the first PLMN, and the UE turns off the N1 mode capability.
采用该设计，若UE识别第一PLMN与第二PLMN一致，则可关闭N1模式能力，不再尝试注册到第一PLMN以提高注册效率，后续UE可再次执行PLMN选择。With this design, if the UE recognizes that the first PLMN is consistent with the second PLMN, it can turn off the N1 mode capability, and no longer try to register to the first PLMN to improve registration efficiency, and the subsequent UE can perform PLMN selection again.
在一种可能的设计中，UE根据第一PLMN的信息确定第二PLMN为第一PLMN列表中的PLMN，或者说，UE根据第一PLMN的信息确定该第一PLMN列表包括该第二PLMN，则UE关闭N1模式能力。In a possible design, the UE determines that the second PLMN is the PLMN in the first PLMN list according to the information of the first PLMN, or in other words, the UE determines that the first PLMN list includes the second PLMN according to the information of the first PLMN, Then the UE turns off the N1 mode capability.
采用该设计，若UE识别第二PLMN与第一PLMN列表中的UE此前尝试注册但注册失败的PLMN一致，则可关闭N1模式能力，不再尝试注册到该PLMN以提高注册效率，后续UE可再次执行PLMN选择。With this design, if the UE recognizes that the second PLMN is the same as the PLMN in the first PLMN list that the UE tried to register but failed to register, it can turn off the N1 mode capability and no longer try to register to the PLMN to improve registration efficiency. The subsequent UE can Perform PLMN selection again.
在一种可能的设计中，若UE确定在N1模式能力开启时搜索到的待选PLMN均属于第一PLMN列表，则关闭N1模式能力，UE不再尝试注册到该PLMN以提高注册效率。In a possible design, if the UE determines that the candidate PLMNs searched when the N1 mode capability is turned on belong to the first PLMN list, the N1 mode capability is turned off, and the UE does not attempt to register to the PLMN to improve registration efficiency.
在一种可能的设计中，UE可接收来自于网络设备的第五指示信息，该第五指示信息可用于指示至少一个引导网络切片的信息。UE可根据该引导网络切片的信息，向网络设备发送第三注册请求消息，该第三注册请求消息中包括至少一个引导网络切片的信息。In a possible design, the UE may receive fifth indication information from the network device, and the fifth indication information may be used to indicate at least one information for guiding the network slice. The UE may send a third registration request message to the network device according to the information for guiding the network slice, where the third registration request message includes at least one information for guiding the network slice.
采用该设计，UE可根据网络设备指示的引导网络切片请求注册以提高注册效率。With this design, the UE can request registration according to the guided network slice indicated by the network device to improve registration efficiency.
在一种可能的设计中，UE可接收来自于网络设备的第六指示信息，该第六指示信息 用于指示UE不需要重新注册，或用于指示UE不需要对第一PLMN重新注册，则UE可删除与第一PLMN相关联的被拒绝的网络切片的信息。In a possible design, the UE may receive sixth indication information from the network device, the sixth indication information is used to indicate that the UE does not need to re-register, or to indicate that the UE does not need to re-register to the first PLMN, then The UE may delete the information of the rejected network slice associated with the first PLMN.
采用该设计，UE可根据不重新注册指示信息，删除存储的与第一PLMN相关联的被拒绝的网络切片的信息。第六指示信息可包括在第二去注册请求消息中，该第二去注册请求消息用于指示UE在第一PLMN执行去注册，第六指示信息具体可以是不重新注册指示信息。With this design, the UE can delete the stored information of the rejected network slice associated with the first PLMN according to the non-registration indication information. The sixth indication information may be included in the second de-registration request message, which is used to instruct the UE to perform de-registration in the first PLMN, and the sixth indication information may specifically be non-re-registration indication information.
应理解，以上网络设备可包括接入与移动性管理功能(access and mobility management function，AMF)。It should be understood that the above network equipment may include access and mobility management functions (AMF).
第二方面，本申请实施例提供一种通信方法，该方法可以由UE执行，也可以由UE的部件(比如处理器、芯片或芯片***等)执行。In the second aspect, the embodiments of the present application provide a communication method, which may be executed by a UE, or may be executed by a component of the UE (such as a processor, a chip, or a chip system, etc.).
下面以执行主体为UE为例进行描述。根据该方法，UE可向网络设备发送第二注册请求消息，该第二注册请求消息不包括网络切片的信息，或者说，该第二注册请求消息中不携带requested NSSAI，该网络设备部署于第一PLMN。UE可接收来自于所述网络设备的第四指示信息，并根据该第四指示信息，从该第一PLMN选择至第二PLMN。The following description takes the UE as an example. According to this method, the UE can send a second registration request message to the network device. The second registration request message does not include network slice information. In other words, the second registration request message does not carry the requested NSSAI, and the network device is deployed in the first One PLMN. The UE may receive the fourth indication information from the network device, and select from the first PLMN to the second PLMN according to the fourth indication information.
采用该设计，UE在发送不包括网络切片的信息的第二注册请求消息后，根据来自于网络设备的第四指示信息关闭N1模式能力，并执行PLMN选择，尝试在其他PLMN下的注册，以提高注册效率。With this design, after the UE sends the second registration request message that does not include network slice information, it shuts down the N1 mode capability according to the fourth instruction information from the network device, and performs PLMN selection, and tries to register under other PLMNs. Improve registration efficiency.
在一种可能的设计中，UE在从第一PLMN选择至第二PLMN后，保留第一PLMN的信息。In a possible design, the UE retains the information of the first PLMN after selecting from the first PLMN to the second PLMN.
采用该设计，UE在从第一PLMN选择至第二PLMN后，仍然保留第一PLMN的信息，因此能够识别第二PLMN是否仍是第一PLMN(或者此前选择过但注册失败的其他PLMN)。With this design, after the UE selects from the first PLMN to the second PLMN, it still retains the information of the first PLMN, so it can identify whether the second PLMN is still the first PLMN (or other PLMNs that were previously selected but failed to register).
在一种可能的设计中，UE从第一PLMN选择至第二PLMN，且第一PLMN与第二PLMN不同，以避免重复在第一PLMN请求注册。In a possible design, the UE selects from the first PLMN to the second PLMN, and the first PLMN is different from the second PLMN, so as to avoid repeating requests for registration in the first PLMN.
在一种可能的设计中，UE可将第一PLMN的信息存储至第一PLMN列表中。该第一PLMN列表包括没有可用网络切片的PLMN。或者说，第一PLMN列表中的PLMN没有可用网络切片。In a possible design, the UE may store the information of the first PLMN in the first PLMN list. The first PLMN list includes PLMNs with no available network slices. In other words, there are no available network slices for the PLMN in the first PLMN list.
在一种可能的设计中，UE可根据第一PLMN列表确定该第二PLMN，其中，第二PLMN不包括在第一PLMN列表中。或者说，UE可从不包括在第一PLMN列表的PLMN中确定第二PLMN，以避免再次选择到没有可用网络切片的PLMN，提高注册效率。In a possible design, the UE may determine the second PLMN according to the first PLMN list, where the second PLMN is not included in the first PLMN list. In other words, the UE may determine the second PLMN from the PLMNs that are not included in the first PLMN list, so as to avoid re-selecting PLMNs with no available network slices and improve registration efficiency.
在一种可能的设计中，UE根据第一PLMN的信息确定第一PLMN与第二PLMN相同，则UE关闭N1模式能力。In a possible design, the UE determines that the first PLMN is the same as the second PLMN according to the information of the first PLMN, and the UE turns off the N1 mode capability.
采用该设计，若UE识别第一PLMN与第二PLMN一致，则可关闭N1模式能力，不再尝试注册到第一PLMN以提高注册效率，后续UE可再次执行PLMN选择。With this design, if the UE recognizes that the first PLMN is consistent with the second PLMN, it can turn off the N1 mode capability, and no longer try to register to the first PLMN to improve registration efficiency, and the subsequent UE can perform PLMN selection again.
在一种可能的设计中，UE根据第一PLMN的信息确定第二PLMN为第一PLMN列表中的PLMN，或者说，UE根据第一PLMN的信息确定该第一PLMN列表包括该第二PLMN，则UE关闭N1模式能力。In a possible design, the UE determines that the second PLMN is the PLMN in the first PLMN list according to the information of the first PLMN, or in other words, the UE determines that the first PLMN list includes the second PLMN according to the information of the first PLMN, Then the UE turns off the N1 mode capability.
采用该设计，若UE识别第二PLMN与第一PLMN列表中的UE此前尝试注册但注册失败的PLMN一致，则可关闭N1模式能力，不再尝试注册到该PLMN以提高注册效率，后续UE可再次执行PLMN选择。With this design, if the UE recognizes that the second PLMN is the same as the PLMN in the first PLMN list that the UE tried to register but failed to register, it can turn off the N1 mode capability and no longer try to register to the PLMN to improve registration efficiency. The subsequent UE can Perform PLMN selection again.
在一种可能的设计中，若UE确定在N1模式能力开启时搜索到的待选PLMN均属于 第一PLMN列表，则关闭N1模式能力，UE不再尝试注册到该PLMN以提高注册效率。In a possible design, if the UE determines that the candidate PLMNs searched for when the N1 mode capability is turned on belong to the first PLMN list, the N1 mode capability is turned off, and the UE does not attempt to register to the PLMN to improve registration efficiency.
在一种可能的设计中，UE可接收来自于网络设备的第五指示信息，该第五指示信息可用于指示至少一个引导网络切片的信息。UE可根据该引导网络切片的信息，向网络设备发送第三注册请求消息，该第三注册请求消息中包括至少一个引导网络切片的信息。In a possible design, the UE may receive fifth indication information from the network device, and the fifth indication information may be used to indicate at least one information for guiding the network slice. The UE may send a third registration request message to the network device according to the information for guiding the network slice, where the third registration request message includes at least one information for guiding the network slice.
采用该设计，UE可根据网络设备指示的引导网络切片请求注册以提高注册效率。With this design, the UE can request registration according to the guided network slice indicated by the network device to improve registration efficiency.
在一种可能的设计中，UE可接收来自于网络设备的第六指示信息，该第六指示信息用于指示UE不需要重新注册，或用于指示UE不需要对第一PLMN重新注册。则UE可删除与第一PLMN相关联的被拒绝的网络切片的信息。第六指示信息可包括在第二去注册请求消息中，该第二去注册请求消息用于指示UE在第一PLMN执行去注册，第六指示信息具体可以是不重新注册指示信息。In a possible design, the UE may receive sixth indication information from the network device, where the sixth indication information is used to indicate that the UE does not need to re-register, or is used to indicate that the UE does not need to re-register with the first PLMN. Then the UE may delete the information of the rejected network slice associated with the first PLMN. The sixth indication information may be included in the second de-registration request message, which is used to instruct the UE to perform de-registration in the first PLMN, and the sixth indication information may specifically be non-re-registration indication information.
采用该设计，UE可根据不重新注册指示信息，删除存储的与第一PLMN相关联的被拒绝的网络切片的信息。With this design, the UE can delete the stored information of the rejected network slice associated with the first PLMN according to the non-registration indication information.
在一种可能的设计中，UE可接收来自于网络设备的第六指示信息，该第六指示信息用于指示UE不需要重新注册，或用于指示UE不需要对第一PLMN重新注册，则UE可删除与第一PLMN相关联的被拒绝的网络切片的信息。In a possible design, the UE may receive sixth indication information from the network device, the sixth indication information is used to indicate that the UE does not need to re-register, or to indicate that the UE does not need to re-register to the first PLMN, then The UE may delete the information of the rejected network slice associated with the first PLMN.
采用该设计，UE可根据不重新注册指示信息，删除存储的与第一PLMN相关联的被拒绝的网络切片的信息。第六指示信息可包括在第二去注册请求消息中，该第二去注册请求消息用于指示UE在第一PLMN执行去注册，第六指示信息具体可以是不重新注册指示信息。With this design, the UE can delete the stored information of the rejected network slice associated with the first PLMN according to the non-registration indication information. The sixth indication information may be included in the second de-registration request message, which is used to instruct the UE to perform de-registration in the first PLMN, and the sixth indication information may specifically be non-re-registration indication information.
应理解，以上网络设备可包括AMF。It should be understood that the above network equipment may include AMF.
第三方面，本申请实施例提供一种通信方法，该方法可以由网络设备执行，也可以由网络设备的部件(比如处理器、芯片或芯片***等)执行。例如，网络设备可以是AMF。In the third aspect, the embodiments of the present application provide a communication method, which may be executed by a network device, or may be executed by a component of the network device (such as a processor, a chip, or a chip system, etc.). For example, the network device may be AMF.
下面以执行主体为AMF为例进行描述。根据该方法，AMF可向UE发送至少一个被拒绝的网络切片的信息和第一指示信息。其中，AMF部署于第一PLMN。该第一指示信息可用于指示UE在该第一PLMN进入去注册态后，保留与该第一PLMN相关联的被拒绝的网络切片的信息。In the following, the execution subject is AMF as an example for description. According to this method, the AMF can send the information of at least one rejected network slice and the first indication information to the UE. Among them, AMF is deployed in the first PLMN. The first indication information may be used to instruct the UE to retain the rejected network slice information associated with the first PLMN after the first PLMN enters the de-registration state.
在一种可能的设计中，AMF可向UE发送第一注册拒绝消息或第一去注册请求消息，第一注册拒绝消息或第一去注册请求消息中包括至少一个被拒绝的网络切片的信息和第一指示信息。其中，第一注册拒绝消息用于指示该第一注册请求消息被拒绝，第一去注册请求消息用于指示UE在该第一PLMN执行去注册。例如，第一指示信息可以是第一去注册请求消息中的重新注册指示信息。该重新注册指示信息可用于指示UE在该第一PLMN执行去注册后，需要在该第一PLMN重新请求注册。In a possible design, the AMF may send a first registration rejection message or a first de-registration request message to the UE, and the first registration rejection message or the first de-registration request message includes information about at least one rejected network slice and The first instruction information. The first registration rejection message is used to indicate that the first registration request message is rejected, and the first de-registration request message is used to instruct the UE to perform de-registration in the first PLMN. For example, the first indication information may be the re-registration indication information in the first de-registration request message. The re-registration indication information may be used to indicate that the UE needs to re-register in the first PLMN after performing de-registration in the first PLMN.
在一种可能的设计中，第一指示信息具体用于指示，UE在第一PLMN进入去注册态后，保留因在第一PLMN内不可用而被拒绝的网络切片的信息。In a possible design, the first indication information is specifically used to indicate that after the UE enters the de-registered state in the first PLMN, it retains information about the network slices that are rejected due to being unavailable in the first PLMN.
在一种可能的设计中，第一指示信息可具体指示UE在第一PLMN处于去注册态且UE驻留的注册区域或跟踪区域不变后，保留因在UE所在的注册区域内不可用而被拒绝的网络切片的信息。In a possible design, the first indication information may specifically indicate that the UE is in the de-registered state in the first PLMN and the registration area or tracking area where the UE resides remains unchanged. Information about rejected network slices.
在一种可能的设计中，AMF可接收来自一UE的第二注册请求消息，该第二注册请求消息不包括网络切片的信息，或者说，该第二注册请求消息中不携带requested NSSAI。AMF可向UE发送第二指示信息，该第二指示信息用于指示UE关闭N1模式能力；或者，AMF 向UE发送第三指示信息，该第三指示信息用于指示无可用的默认网络切片，以及用于指示UE在所述第一PLMN执行PLMN选择后存储该第一PLMN的信息；或者，AMF向UE发送第四指示信息，该第四指示信息用于指示UE执行PLMN选择，以及用于指示UE在所述第一PLMN执行PLMN选择后存储该第一PLMN的信息。In a possible design, the AMF may receive a second registration request message from a UE, and the second registration request message does not include network slice information, or in other words, the second registration request message does not carry the requested NSSAI. The AMF may send second indication information to the UE, the second indication information is used to instruct the UE to turn off the N1 mode capability; or, the AMF may send third indication information to the UE, and the third indication information is used to indicate that no default network slice is available, And for instructing the UE to store the information of the first PLMN after the first PLMN performs PLMN selection; or, the AMF sends fourth indication information to the UE, the fourth indication information is used for instructing the UE to perform PLMN selection, and for Instruct the UE to store the information of the first PLMN after performing PLMN selection in the first PLMN.
在一种可能的设计中，AMF可向UE发送第五指示信息，第五指示信息用于指示至少一个引导网络切片。AMF还可接收来自于UE的第三注册请求消息，该第三注册请求消息用于请求接入至少一个引导网络切片。其中，第三注册请求消息可包括至少一个引导网络切片的信息。In a possible design, the AMF may send fifth indication information to the UE, and the fifth indication information is used to indicate at least one boot network slice. The AMF may also receive a third registration request message from the UE, where the third registration request message is used to request access to at least one guided network slice. Wherein, the third registration request message may include at least one piece of information for guiding the network slice.
第四方面，本申请实施例提供一种通信方法，该方法可以由网络设备执行，也可以由网络设备的部件(比如处理器、芯片或芯片***等)执行。例如，网络设备可以是AMF。In a fourth aspect, the embodiments of the present application provide a communication method, which may be executed by a network device, or may be executed by a component of the network device (such as a processor, a chip, or a chip system, etc.). For example, the network device may be AMF.
下面以执行主体为AMF为例进行描述。根据该方法，AMF可接收来自一UE的第二注册请求消息，该第二注册请求消息不包括网络切片的信息，或者说，该第二注册请求消息中不携带requested NSSAI。AMF可向UE发送第二指示信息，该第二指示信息用于指示UE关闭N1模式能力；或者，AMF向UE发送第三指示信息，该第三指示信息用于指示无可用的默认网络切片，以及用于指示UE在所述第一PLMN执行PLMN选择后存储该第一PLMN的信息；或者，AMF向UE发送第四指示信息，该第四指示信息用于指示UE执行PLMN选择，以及用于指示UE在所述第一PLMN执行PLMN选择后存储该第一PLMN的信息。In the following, the execution subject is AMF as an example for description. According to this method, the AMF can receive a second registration request message from a UE. The second registration request message does not include network slice information, or in other words, the second registration request message does not carry the requested NSSAI. The AMF may send second indication information to the UE, the second indication information is used to instruct the UE to turn off the N1 mode capability; or, the AMF may send third indication information to the UE, and the third indication information is used to indicate that no default network slice is available, And for instructing the UE to store the information of the first PLMN after the first PLMN performs PLMN selection; or, the AMF sends fourth indication information to the UE, the fourth indication information is used for instructing the UE to perform PLMN selection, and for Instruct the UE to store the information of the first PLMN after performing PLMN selection in the first PLMN.
在一种可能的设计中，AMF可向UE发送第五指示信息，第五指示信息用于指示至少一个引导网络切片。AMF还可接收来自于UE的第三注册请求消息，该第三注册请求消息用于请求接入至少一个引导网络切片。其中，第三注册请求消息可包括至少一个引导网络切片的信息。In a possible design, the AMF may send fifth indication information to the UE, and the fifth indication information is used to indicate at least one boot network slice. The AMF may also receive a third registration request message from the UE, where the third registration request message is used to request access to at least one guided network slice. Wherein, the third registration request message may include at least one piece of information for guiding the network slice.
第五方面，本申请实施例提供一种通信装置，所述通信装置用于实现上述第一方面或第一方面的各个可能的设计示例中UE的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。In a fifth aspect, an embodiment of the present application provides a communication device, which is configured to implement the function of the UE in the foregoing first aspect or each possible design example of the first aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.
在一个可能的设计中，所述通信装置的结构中可包括通信模块和处理模块，这些模块可以执行上述第一方面或第一方面的各个可能的设计示例中UE的相应功能，具体参见第一方面中的详细描述，此处不做赘述。In a possible design, the structure of the communication device may include a communication module and a processing module, and these modules may perform the corresponding functions of the UE in the first aspect or each possible design example of the first aspect. For details, refer to the first aspect. The detailed description in the aspect will not be repeated here.
在一个可能的设计中，所述通信装置的结构中包括处理器，可选的还包括收发器和存储器。所述收发器可用于收发信息或数据，以及用于该通信装置与网络***中的其他通信装置进行通信交互。所述处理器被配置为支持所述通信装置执行上述第一方面或第一方面的各个可能的设计示例中UE的相应的功能。所述存储器与所述处理器耦合，用于保存所述第一通信装置必要的程序指令和数据。In a possible design, the structure of the communication device includes a processor, and optionally a transceiver and a memory. The transceiver can be used to send and receive information or data, and to communicate and interact with other communication devices in the network system. The processor is configured to support the communication device to perform the corresponding function of the UE in the foregoing first aspect or each possible design example of the first aspect. The memory is coupled with the processor, and is used to store necessary program instructions and data of the first communication device.
示例性的，该通信装置为UE或UE中的组件，如芯片、收发器等等。Exemplarily, the communication device is a UE or a component in the UE, such as a chip, a transceiver, and so on.
第六方面，本申请实施例提供一种通信装置，所述通信装置用于实现上述第二方面或第二方面的各个可能的设计示例中UE的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。In a sixth aspect, an embodiment of the present application provides a communication device, which is configured to implement the function of the UE in the foregoing second aspect or each possible design example of the second aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.
在一个可能的设计中，所述通信装置的结构中可包括通信模块和处理模块，这些模块可以执行上述第二方面或第二方面的各个可能的设计示例中UE的相应功能，具体参见第一方面中的详细描述，此处不做赘述。In a possible design, the structure of the communication device may include a communication module and a processing module, and these modules may perform the corresponding functions of the UE in the second aspect or each possible design example of the second aspect. For details, refer to the first The detailed description in the aspect will not be repeated here.
在一个可能的设计中，所述通信装置的结构中包括处理器，可选的还包括收发器和存储器。所述收发器可用于收发信息或数据，以及用于该通信装置与网络***中的其他通信装置进行通信交互。所述处理器被配置为支持所述通信装置执行上述第二方面或第二方面的各个可能的设计示例中UE的相应的功能。所述存储器与所述处理器耦合，用于保存所述第一通信装置必要的程序指令和数据。In a possible design, the structure of the communication device includes a processor, and optionally a transceiver and a memory. The transceiver can be used to send and receive information or data, and to communicate and interact with other communication devices in the network system. The processor is configured to support the communication device to perform the corresponding function of the UE in the foregoing second aspect or each possible design example of the second aspect. The memory is coupled with the processor, and is used to store necessary program instructions and data of the first communication device.
示例性的，该通信装置为UE或UE中的组件，如芯片、收发器等等。Exemplarily, the communication device is a UE or a component in the UE, such as a chip, a transceiver, and so on.
第七方面，本申请实施例提供一种通信装置，所述通信装置用于实现上述第三方面或第三方面的各个可能的设计示例中网络设备的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。In a seventh aspect, an embodiment of the present application provides a communication device, which is configured to implement the function of the network device in the foregoing third aspect or each possible design example of the third aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.
在一个可能的设计中，所述通信装置的结构中可包括通信模块和处理模块，这些模块可以执行上述第三方面或第三方面的各个可能的设计示例中网络设备的相应功能，具体参见方法示例中的详细描述，此处不做赘述。In a possible design, the structure of the communication device may include a communication module and a processing module, and these modules can perform the corresponding functions of the network device in the third aspect or each possible design example of the third aspect. For details, refer to the method The detailed description in the example will not be repeated here.
在一个可能的设计中，所述通信装置的结构中包括处理器，可选的还包括通信接口(如无线收发器)和存储器。所述通信接口可用于收发信息或数据，以及用于该通信装置与网络***中的其他通信装置进行通信交互。所述处理器被配置为支持所述通信装置执行上述第三方面或第三方面的各个可能的设计示例中网络设备的相应的功能。所述存储器与所述处理器耦合，用于保存所述第一通信装置必要的程序指令和数据。In a possible design, the structure of the communication device includes a processor, and optionally a communication interface (such as a wireless transceiver) and a memory. The communication interface can be used to send and receive information or data, and to communicate and interact with other communication devices in the network system. The processor is configured to support the communication device to execute the corresponding function of the network device in the foregoing third aspect or each possible design example of the third aspect. The memory is coupled with the processor, and is used to store necessary program instructions and data of the first communication device.
示例性的，该通信装置为网络设备或网络设备中的组件，如芯片、收发器等等。网络设备可以是AMF。Exemplarily, the communication device is a network device or a component in the network device, such as a chip, a transceiver, and so on. The network device can be AMF.
第八方面，本申请实施例提供一种通信装置，所述通信装置用于实现上述第四方面或第四方面的各个可能的设计示例中网络设备的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。In an eighth aspect, an embodiment of the present application provides a communication device, where the communication device is configured to implement the function of the network device in the foregoing fourth aspect or each possible design example of the fourth aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.
在一个可能的设计中，所述通信装置的结构中可包括通信模块和处理模块，这些模块可以执行上述第四方面或第四方面的各个可能的设计示例中网络设备的相应功能，具体参见方法示例中的详细描述，此处不做赘述。In a possible design, the structure of the communication device may include a communication module and a processing module, and these modules can perform the corresponding functions of the network device in the fourth aspect or each possible design example of the fourth aspect. For details, refer to the method The detailed description in the example will not be repeated here.
在一个可能的设计中，所述通信装置的结构中包括处理器，可选的还包括通信接口(如无线收发器)和存储器。所述通信接口可用于收发信息或数据，以及用于该通信装置与网络***中的其他通信装置进行通信交互。所述处理器被配置为支持所述通信装置执行上述第四方面或第四方面的各个可能的设计示例中网络设备的相应的功能。所述存储器与所述处理器耦合，用于保存所述第一通信装置必要的程序指令和数据。In a possible design, the structure of the communication device includes a processor, and optionally a communication interface (such as a wireless transceiver) and a memory. The communication interface can be used to send and receive information or data, and to communicate and interact with other communication devices in the network system. The processor is configured to support the communication device to perform the corresponding function of the network device in the foregoing fourth aspect or each possible design example of the fourth aspect. The memory is coupled with the processor, and is used to store necessary program instructions and data of the first communication device.
示例性的，该通信装置为网络设备或网络设备中的组件，如芯片、收发器等等。网络设备可以是AMF。Exemplarily, the communication device is a network device or a component in the network device, such as a chip, a transceiver, and so on. The network device can be AMF.
第九方面，本申请实施例提供一种通信***。该通信***可包括以上第五方面及提供的通信装置以及包括以上第七方面提供的通信装置，或者，该通信***可包括以上第六方面提供的通信装置以及包括以上第八方面提供的通信装置。In a ninth aspect, an embodiment of the present application provides a communication system. The communication system may include the communication device provided in the above fifth aspect and the communication device provided in the above seventh aspect, or the communication system may include the communication device provided in the above sixth aspect and the communication device provided in the above eighth aspect .
第十方面，本申请提供一种计算机存储介质，所述计算机存储介质中存储有程序或，当其在计算机上被调用执行时，使得计算机执行上述第一方面或第一方面的任意一种可能的设计、第二方面或第二方面的任意一种可能的设计、第三方面或第三方面的任意一种可能的设计或第四方面或第四方面的任意一种可能的设计中所述的方法。In a tenth aspect, this application provides a computer storage medium in which a program is stored or, when it is invoked for execution on a computer, the computer can execute any one of the above-mentioned first aspect or the first aspect. The design, the second or the second aspect of any possible design, the third or the third aspect of any possible design, or the fourth or the fourth aspect of any one of the possible designs Methods.
第十一方面，本申请提供一种计算机程序产品，该计算基础产品可包含程序或指令， 当所述计算机程序产品在计算机上运行时，使得计算机执行上述第一方面或第一方面的任意一种可能的设计、第二方面或第二方面的任意一种可能的设计、第三方面或第三方面的任意一种可能的设计或第四方面或第四方面的任意一种可能的设计中所述的方法。In an eleventh aspect, this application provides a computer program product. The basic computing product may include a program or instruction. When the computer program product runs on a computer, the computer executes any one of the first aspect or the first aspect. One of the possible designs, any one of the second or second aspects, any one of the third or third aspects, or any one of the fourth or fourth aspects The method described.
第十二方面，本申请提供一种芯片或包含芯片的芯片***，该芯片可包括处理器。该芯片还可以包括存储器(或存储模块)和/或收发器(或通信模块)。该芯片可用于执行上述第一方面或第一方面的任意一种可能的设计、第二方面或第二方面的任意一种可能的设计、第三方面或第三方面的任意一种可能的设计或第四方面或第四方面的任意一种可能的设计中所述的方法。该芯片***可以由上述芯片构成，也可以包含上述芯片和其他分立器件，如存储器(或存储模块)和/或收发器(或通信模块)。In a twelfth aspect, the present application provides a chip or a chip system including the chip, and the chip may include a processor. The chip may also include a memory (or storage module) and/or a transceiver (or communication module). The chip can be used to implement any possible design of the first aspect or the first aspect, any possible design of the second or second aspect, and any possible design of the third aspect or the third aspect. Or the method described in the fourth aspect or any one of the possible designs of the fourth aspect. The chip system may be composed of the above-mentioned chips, or may include the above-mentioned chips and other discrete devices, such as a memory (or storage module) and/or a transceiver (or communication module).
上述第三方面至第十二方面及其可能的设计中的有益效果可以参考对第一方面及其任一可能的设计或第二方面及其任一可能的设计中所述方法的有益效果的描述。The beneficial effects of the third aspect to the twelfth aspect and its possible designs can be referred to the beneficial effects of the method described in the first aspect and any of its possible designs or the second aspect and any of its possible designs. describe.
附图说明Description of the drawings
图1为本申请实施例提供的一种通信***的架构示意图；FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of this application;
图2为本申请实施例提供的一种通信方法的流程示意图；FIG. 2 is a schematic flowchart of a communication method provided by an embodiment of this application;
图3为本申请实施例提供的另一种通信方法的流程示意图；FIG. 3 is a schematic flowchart of another communication method provided by an embodiment of this application;
图4为本申请实施例提供的另一种通信方法的流程示意图；FIG. 4 is a schematic flowchart of another communication method provided by an embodiment of this application;
图5为本申请实施例提供的另一种通信方法的流程示意图；FIG. 5 is a schematic flowchart of another communication method provided by an embodiment of this application;
图6为本申请实施例提供的另一种通信方法的流程示意图；FIG. 6 is a schematic flowchart of another communication method provided by an embodiment of this application;
图7为本申请实施例提供的另一种通信方法的流程示意图；FIG. 7 is a schematic flowchart of another communication method provided by an embodiment of this application;
图8为本申请实施例提供的一种通信装置的结构示意图；FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of this application;
图9为本申请实施例提供的另一种通信装置的结构示意图；FIG. 9 is a schematic structural diagram of another communication device provided by an embodiment of this application;
图10为本申请实施例提供的另一种通信装置的结构示意图。FIG. 10 is a schematic structural diagram of another communication device provided by an embodiment of this application.
具体实施方式Detailed ways
为了提高UE在注册过程的效率，本申请提供一种通信方法。下面将结合附图对本申请作进一步地详细描述。应理解，下面所介绍的方法实施例中的具体操作方法也可以应用于装置实施例或***实施例中。In order to improve the efficiency of the UE registration process, this application provides a communication method. The application will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific operation methods in the method embodiments introduced below may also be applied to the device embodiment or the system embodiment.
本申请提供的通信方法，可由包括接入网网元、移动性管理网元、网络切片选择网元、策略控制网元、会话管理网元、用户面网元、数据管理网元或者应用功能网元中的部分或全部网元的通信***实现。应理解，本不申请并不限制该通信***包含上述列举的网元以外的其他网元。The communication method provided in this application may include an access network element, a mobility management network element, a network slice selection network element, a policy control network element, a session management network element, a user plane network element, a data management network element, or an application function network. The communication system of some or all of the network elements in the element is realized. It should be understood that this application does not limit the communication system to include other network elements than those listed above.
例如，本申请实施例提供的通信方法可以用于如图1所示5G移动通信***。以下根据图1所示架构对本申请实施例提供的通信方法可能应用的通信***进行说明。For example, the communication method provided in the embodiment of the present application may be used in the 5G mobile communication system as shown in FIG. 1. The following describes the communication system to which the communication method provided in the embodiment of the present application may be applied according to the architecture shown in FIG. 1.
图1所示的网络架构中可包括三部分：UE、数据网络(data network，DN)和运营商网络。其中，运营商网络可包括网络切片选择功能(network slice selection function，NSSF)、策略控制功能(policy control function，PCF)、统一数据管理(unified data management，UDM)、应用功能(application function，AF)、接入与移动性管理功能(access and mobility management function，AMF)、会话管理功能(session management function，SMF)、(无线) 接入网((radio)access network，(R)AN)以及UPF等。上述运营商网络中，除(无线)接入网之外的部分可以包括在核心网络(core network，CN)的范畴内。为方便说明，后续以(R)AN称为RAN为例进行说明。The network architecture shown in Figure 1 may include three parts: UE, data network (DN), and operator network. Among them, the operator network may include network slice selection function (NSSF), policy control function (PCF), unified data management (UDM), application function (AF) , Access and mobility management function (access and mobility management function, AMF), session management function (session management function, SMF), (wireless) access network ((radio) access network, (R) AN), UPF, etc. . In the above-mentioned operator's network, parts other than the (wireless) access network may be included in the category of core network (core network, CN). For the convenience of description, the following takes (R)AN as RAN as an example for description.
此外在图1中，N1、N2、N3、N4、N6、N9、Nnssf、Nnef、Nnrf、Npcf、Nudm、Naf、Nausf、Namf以及Nsmf等标识接口。这些接***义可参见第三代合作伙伴计划(3rd generation partnership project，3GPP)相关标准协议中定义的含义，在此不做限制。In addition, in Figure 1, N1, N2, N3, N4, N6, N9, Nnssf, Nnef, Nnrf, Npcf, Nudm, Naf, Nausf, Namf, and Nsmf identify interfaces. The meanings of these interfaces can be referred to the meanings defined in the 3rd generation partnership project (3rd generation partnership project, 3GPP) related standard protocols, which are not limited here.
应理解，以上所述移动性管理网元可由是由运营商网络提供的控制面网元，负责终端接入运营商网络时的接入控制和移动性管理，其具备例如移动状态管理，分配用户临时身份标识，认证和授权用户等功能。在5G中，移动性管理网元可以是以上所述的AMF，在未来通信如第六代(the 6th generation，6G)中，移动性管理网元仍可以是AMF，或有其它的名称，本申请不做限定。It should be understood that the above-mentioned mobility management network element may be a control plane network element provided by the operator's network, which is responsible for access control and mobility management when the terminal accesses the operator's network. It has, for example, mobility status management and user allocation. Functions such as temporary identification, authentication and authorization of users. In 5G, the mobility management network element can be the above-mentioned AMF. In future communications, such as the 6th generation (6G), the mobility management network element can still be AMF or have other names. The application is not limited.
如图1所示，UE可接入至AMF以获得运营商网络提供的服务。UE接入AMF的过程在本申请中可称为注册，例如初始注册。例如，UE可向AMF发送注册请求消息，在该注册请求消息中可携带requested NSSAI，从而请求注册到requested NSSAI指示的网络切片。As shown in Figure 1, the UE can access the AMF to obtain services provided by the operator's network. The process of the UE accessing the AMF may be referred to as registration in this application, such as initial registration. For example, the UE may send a registration request message to the AMF, and the requested NSSAI may be carried in the registration request message, thereby requesting registration to the network slice indicated by the requested NSSAI.
网络切片选择网元可用于执行网络切片的选择、allowed NSSAI的确定、configured NSSAI的确定等功能。在5G中，网络切片选择网元可以是NSSF，在未来通信如第六代(the 6th generation，6G)中，网络切片选择网元仍可以是NSSF，或有其它的名称，本申请不做限定。The network slice selection network element can be used to perform functions such as network slice selection, allowed NSSAI determination, and configured NSSAI determination. In 5G, the network slice selection network element can be NSSF. In future communications such as the 6th generation (6G), the network slice selection network element can still be NSSF or have other names, which is not limited in this application. .
策略控制网元是由运营商提供的控制面功能，用于向会话管理网元提供PDU会话的策略。策略可以包括计费相关策略、服务质量(quality of service，QoS)相关策略、数据流识别和导向(或称转发)策略和授权相关策略等。在5G中，策略控制网元可以是PCF，在未来通信如6G中，策略控制网元仍可以是PCF，或有其它的名称，本申请不做限定。The policy control network element is a control plane function provided by the operator to provide a PDU session policy to the session management network element. Strategies may include charging-related strategies, quality of service (QoS)-related strategies, data flow identification and orientation (or forwarding) strategies, authorization-related strategies, and the like. In 5G, the policy control network element may be PCF. In future communications such as 6G, the policy control network element may still be PCF or have other names, which is not limited by this application.
会话管理网元是由运营商网络提供的控制面网元，负责管理终端的PDU会话，或称，会话管理网元服务于终端的PDU会话。PDU会话是一个用于传输PDU的通道，终端需要通过PDU会话与DN互相传送PDU。PDU会话由SMF负责建立、维护和删除等。SMF包括会话管理(如会话建立、修改和释放，包含UPF和RAN之间的隧道维护)、UPF的选择和控制、业务和会话连续性(service and session continuity，SSC)模式选择、漫游等会话相关的功能。SMF可用于选择为用户进行服务的UPF，比如选择更靠近用户所在基站的UPF，来降低用户收发包时延。在5G中，会话管理网元可以是SMF，在未来通信如6G中，会话管理网元仍可以是SMF，或有其它的名称，本申请不做限定。The session management network element is a control plane network element provided by the operator's network and is responsible for managing the PDU session of the terminal. In other words, the session management network element serves the PDU session of the terminal. The PDU session is a channel used to transmit PDUs, and the terminal needs to transmit PDUs to each other through the PDU session and the DN. SMF is responsible for the establishment, maintenance and deletion of PDU sessions. SMF includes session management (such as session establishment, modification and release, including tunnel maintenance between UPF and RAN), UPF selection and control, service and session continuity (SSC) mode selection, roaming and other session related Function. SMF can be used to select the UPF that serves the user, such as selecting the UPF that is closer to the base station where the user is located, to reduce the user's packet sending and receiving delay. In 5G, the session management network element may be SMF. In future communications such as 6G, the session management network element may still be SMF or have other names, which is not limited by this application.
用户面网元主要负责用户数据的转发。在5G中，用户面网元可以是UPF，在未来通信如6G中，用户面网元仍可以是UPF，或有其它的名称，本申请不做限定。The user plane network element is mainly responsible for the forwarding of user data. In 5G, the user plane network element may be UPF. In future communications such as 6G, the user plane network element may still be UPF or have other names, which is not limited by this application.
数据管理网元中保存有用户的签约数据，比如用户签约的QoS数据等，用于提供数据存储和查询功能。在5G中，数据管理网元可以是UDM，在未来通信如6G中，数据管理网元仍可以是UDM，或有其它的名称，本申请不做限定。The data management network element stores the user's subscription data, such as the QoS data of the user's subscription, which is used to provide data storage and query functions. In 5G, the data management network element may be UDM. In future communications such as 6G, the data management network element may still be UDM or have other names, which is not limited by this application.
以上应用功能网元可用于选择、重选、定位、重定位应用的应用服务器(application service，AS)，并与核心网进行交互。在5G中，应用功能网元可以是AF，在未来通信如6G中，应用功能网元仍可以是AF，或有其它的名称，本申请不做限定。The above application function network elements can be used to select, reselect, locate, and relocate the application server (application service, AS) of the application, and interact with the core network. In 5G, the application function network element may be AF. In future communications such as 6G, the application function network element may still be AF or have other names, which is not limited by this application.
接入网网元可用于支持UE接入5G CN，以及用于业务数据的传输。在5G中，接入 网网元可以是RAN，在未来通信如6G中，接入网网元仍可以是RAN，或有其它的名称，本申请不做限定。The access network elements can be used to support the UE's access to 5G and CN, as well as for the transmission of business data. In 5G, the access network element may be RAN. In future communications such as 6G, the access network element may still be RAN or have other names, which is not limited in this application.
基于以上通信***，本申请实施例提供一种通信方法，用以提高UE向网络进行注册的效率。示例性的，该通信方法可由UE以及网络设备执行。其中，网络设备可以是移动性管理网元或具备移动管理网元功能的设备、网元。例如，网络设备可以是图1所示AMF。Based on the above communication system, an embodiment of the present application provides a communication method to improve the efficiency of UE registration with the network. Exemplarily, the communication method may be executed by the UE and the network device. Among them, the network device may be a mobility management network element or a device or a network element that has the function of a mobility management network element. For example, the network device may be the AMF shown in FIG. 1.
以网络设备是AMF为例，如图2所示，本申请实施例提供的通信方法可包括以下步骤：Taking the network device as an AMF as an example, as shown in FIG. 2, the communication method provided by the embodiment of the present application may include the following steps:
S101：UE接收来自于AMF的至少一个被拒绝的网络切片的信息以及第一指示信息。S101: The UE receives at least one rejected network slice information and first indication information from the AMF.
其中，该AMF部署于第一PLMN内。Wherein, the AMF is deployed in the first PLMN.
被拒绝的网络切片的信息，可包括rejected NSSAI。Information about rejected network slices can include rejected NSSAI.
S102：UE根据第一指示信息，在第一PLMN进入去注册态后，保留(keep)与第一PLMN相关联的被拒绝的网络切片的信息。S102: The UE keeps (keep) the information of the rejected network slice associated with the first PLMN after the first PLMN enters the deregistration state according to the first indication information.
其中，去注册态是指UE没有注册于任何PLMN、没有建立5GMM上下文、UE的位置对于网络设备未知，以及UE对于网络设备不可及的一种状态。Among them, the unregistered state refers to a state in which the UE is not registered in any PLMN, the 5GMM context is not established, the location of the UE is unknown to the network device, and the UE is not reachable to the network device.
或者说，当UE对第一PLMN进入去注册态后，保留与该第一PLMN相关联的被拒绝的网络切片的信息。In other words, after the UE enters the deregistration state for the first PLMN, it retains the information of the rejected network slices associated with the first PLMN.
其中，第一PLMN相关联的被拒绝的网络切片的信息，包括UE在请求注册至第一PLMN的过程中AMF指示的被拒绝的网络切片的信息(包括但不限于S101中来自于AMF的至少一个被拒绝的网络切片的信息)。可选的，第一PLMN相关联的被拒绝的网络切片的信息还包括：UE在注册到第一PLMN后，在第一PLMN去注册之前AMF指示的被拒绝的网络切片的信息。Wherein, the information of the rejected network slice associated with the first PLMN includes the information of the rejected network slice indicated by the AMF in the process of the UE requesting to register with the first PLMN (including but not limited to at least the network slice from the AMF in S101). A rejected network slice information). Optionally, the information of the rejected network slices associated with the first PLMN further includes: after the UE registers with the first PLMN, the information of the rejected network slices indicated by the AMF before the first PLMN goes to register.
示例性的，第一指示信息可用于指示UE在第一PLMN进入去注册态后，保留与第一PLMN相关联的被拒绝的网络切片的信息。或者，可由UE默认在接收到第一指示信息后，在第一PLMN进入去注册态后，保留与第一PLMN相关联的被拒绝的网络切片的信息。也就是说，第一指示信息可以不直接指示UE在第一PLMN进入去注册态后，保留与第一PLMN相关联的被拒绝的网络切片的信息，或者，可以指示其他的内容，但是，UE收到第一指示信息后，在第一PLMN进入去注册态后，保留与第一PLMN相关联的被拒绝的网络切片的信息。Exemplarily, the first indication information may be used to instruct the UE to retain the information of the rejected network slice associated with the first PLMN after the first PLMN enters the de-registration state. Alternatively, after receiving the first indication information, the UE may reserve the information of the rejected network slice associated with the first PLMN after the first PLMN enters the de-registered state by default. That is, the first indication information may not directly indicate that the UE retains the information of the rejected network slice associated with the first PLMN after the first PLMN enters the de-registered state, or may indicate other content, but the UE After receiving the first indication information, after the first PLMN enters the de-registration state, the information of the rejected network slice associated with the first PLMN is retained.
采用以上方式，UE可根据第一指示信息，在UE从第一PLMN进入去注册态后仍然保留第一PLMN关联的被拒绝的网络切片的信息，以获知哪些网络切片的信息是被拒绝的网络切片的信息，可避免重复根据这些被拒绝的网络切片的信息请求注册，以提高注册效率。In the above manner, the UE can still retain the rejected network slice information associated with the first PLMN after the UE enters the deregistered state from the first PLMN according to the first indication information, so as to learn which network slice information is the rejected network The sliced information can avoid repeated requests for registration based on the rejected network slice information, so as to improve registration efficiency.
应理解，UE可在从第一PLMN选择至第一PLMN以外的其他PLMN后，删除与第一PLMN关联的被拒绝的网络切片的信息，因此，UE在第一PLMN内请求注册时，不会选择与第一PLMN关联的被拒绝的网络切片的信息作为requested NSSAI。It should be understood that the UE may delete the rejected network slice information associated with the first PLMN after selecting from the first PLMN to a PLMN other than the first PLMN. Therefore, when the UE requests registration in the first PLMN, it will not The information of the rejected network slice associated with the first PLMN is selected as the requested NSSAI.
在S101的一种可能的示例中，UE可接收来自于AMF的第一注册拒绝消息，该第一注册拒绝消息可携带至少一个被拒绝的网络切片的信息以及该第一指示信息。其中，该第一注册拒绝消息可以是AMF在接收到来自于UE的第一注册请求消息后发送的，用于指示AMF拒绝该第一注册请求消息。In a possible example of S101, the UE may receive a first registration rejection message from the AMF, and the first registration rejection message may carry information of at least one rejected network slice and the first indication information. The first registration rejection message may be sent by the AMF after receiving the first registration request message from the UE, and is used to instruct the AMF to reject the first registration request message.
例如，第一注册请求消息可包括至少一个网络切片的信息，例如至少一个requested  NSSAI，每个NSSAI可提供至少一个S-NSSAI，每个S-NSSAI指示一个网络切片。若AMF判断第一注册请求消息携带的requested NSSAI包含的S-NSSAI所指示的网络切片均不可用，则可发送第一注册拒绝消息，其中，该第一注册拒绝消息中的原因值(cause value)信息元素(information element，IE)可被配置为“#62"无网络切片可用(no network slices available)"”。该第一注册拒绝消息还可携带至少一个被拒绝的网络切片的信息(如携带rejected NSSAI，用于指示至少一个S-NSSAI)，该至少一个被拒绝的网络切片的信息可携带于一个或多个IE中。第一注册拒绝消息还可携带第一指示信息，第一指示信息可携带于一个IE中。For example, the first registration request message may include at least one network slice information, such as at least one requested NSSAI, each NSSAI may provide at least one S-NSSAI, and each S-NSSAI indicates one network slice. If the AMF determines that none of the network slices indicated by the S-NSSAI included in the requested NSSAI in the first registration request message is available, it can send a first registration rejection message, where the cause value in the first registration rejection message ) Information element (IE) can be configured as "#62"no network slices available"". The first registration rejection message may also carry information about at least one rejected network slice (for example, it carries rejected NSSAI, which is used to indicate at least one S-NSSAI), and the information about at least one rejected network slice may be carried in one or more IE. The first registration rejection message may also carry first indication information, and the first indication information may be carried in one IE.
此外，第一注册请求消息也可不携带被拒绝的网络切片的信息，当UE接收到携带有原因值为“#62"无网络切片可用"”的注册拒绝消息后，默认此前发送的第一注册请求消息中携带的网络切片的信息为被拒绝的网络切片的信息。应理解，该示例中，UE可将此前发送的第一注册请求消息中携带的网络切片的信息，作为因在该第一PLMN内不可用而被拒绝的网络切片的信息、因在该终端所在的注册区域内不可用而被拒绝的网络切片的信息或者因网络切片的验证和授权失败或撤销而被拒绝的网络切片的信息中的任意一种。In addition, the first registration request message may not carry the information of the rejected network slice. When the UE receives a registration rejection message with a reason value of "#62"No network slice available"", it defaults to the first registration sent before. The network slice information carried in the request message is the rejected network slice information. It should be understood that, in this example, the UE may use the network slice information carried in the first registration request message previously sent as the network slice information that is rejected because it is not available in the first PLMN, and because the terminal is located Any one of the information of the network slices that are not available in the registration area of the network slice that is rejected, or the information of the network slices that are rejected because of the verification and authorization failure or revocation of the network slice.
在S101的另一种可能的示例中，UE可接收来自于AMF的第一去注册请求(de-registration request)消息，该第一去注册请求消息可携带至少一个被拒绝的网络切片的信息以及该第一指示信息。其中，该第一去注册请求消息可以是UE注册到第一PLMN后，AMF发送的，用于指示UE在第一PLMN执行去注册。AMF发送该第一去注册请求消息的原因，可能是UE的签约数据改变而导致特定网络切片验证及授权(network slice-specific authentication and authorization，NSSAA)失败等等。可选地，该第一去注册请求消息中的原因值IE可被配置为“#62"No network slices available"”。In another possible example of S101, the UE may receive a first de-registration request (de-registration request) message from the AMF, and the first de-registration request message may carry information about at least one rejected network slice and The first indication information. The first de-registration request message may be sent by the AMF after the UE is registered to the first PLMN, and is used to instruct the UE to perform de-registration in the first PLMN. The reason why the AMF sends the first de-registration request message may be that the subscription data of the UE is changed and the network slice-specific authentication and authorization (network slice-specific authentication and authorization, NSSAA) fails, and so on. Optionally, the reason value IE in the first deregistration request message may be configured as "#62"No network slices available"".
此时，第一指示信息可以是第一去注册请求消息中的重新注册指示信息。该重新注册指示信息可用于指示UE在第一PLMN进入去注册状态后需要对第一PLMN发起重新注册。At this time, the first indication information may be the re-registration indication information in the first de-registration request message. The re-registration indication information may be used to indicate that the UE needs to initiate re-registration of the first PLMN after the first PLMN enters the de-registration state.
应理解，S102中的与第一PLMN相关联的被拒绝的网络切片信息，包括但不限于S101所示的至少一个被拒绝的网络切片的信息。比如，UE分别多次接收来自该AMF的多个被拒绝的网络切片的信息，其中，S101所示的至少一个被拒绝的网络切片的信息为多个被拒绝的网络切片的信息中的一部分，则与第一PLMN相关联的被拒绝的网络切片信息，包括该多个被拒绝的网络切片的信息。It should be understood that the rejected network slice information associated with the first PLMN in S102 includes but is not limited to the information of at least one rejected network slice shown in S101. For example, the UE receives multiple rejected network slice information from the AMF multiple times, where the information of at least one rejected network slice shown in S101 is part of the information of the multiple rejected network slices. Then the rejected network slice information associated with the first PLMN includes the information of the multiple rejected network slices.
此外，若UE接收来自于网络设备的第六指示信息(比如不重新注册指示信息)，则UE可根据该指示信息删除存储的与第一PLMN相关联的被拒绝的网络切片的信息。其中，第六指示信息可用于指示UE不需要重新注册，或用于指示UE不需要对第一PLMN发起重新注册，因此UE不会重复请求注册到第一PLMN中已经被拒绝的网络切片。第六指示信息可承载于第二去注册请求消息中。In addition, if the UE receives the sixth indication information (such as the non-re-registration indication information) from the network device, the UE may delete the stored information of the rejected network slice associated with the first PLMN according to the indication information. The sixth indication information may be used to indicate that the UE does not need to re-register, or to indicate that the UE does not need to initiate re-registration of the first PLMN, so the UE will not repeatedly request registration to a network slice that has been rejected in the first PLMN. The sixth indication information may be carried in the second de-registration request message.
应理解，以上重新注册指示信息和不重新注册指示信息可占用去注册请求消息中相同的IE，比如，当该IE被配置为“1”时，该IE为重新注册指示信息，当该IE被配置为“0”时，该IE为不重新注册指示信息。It should be understood that the above re-registration instruction information and non-re-registration instruction information can occupy the same IE in the registration request message. For example, when the IE is configured as "1", the IE is the re-registration instruction information. When it is set to "0", this IE is an indication of no re-registration.
应理解，以上被拒绝的网络切片，可包括因在该第一PLMN内不可用而被拒绝的网络切片、因在该终端所在的注册区域内不可用而被拒绝的网络切片或者因网络切片的验证和授权失败或撤销而被拒绝的网络切片中的至少一个网络切片。It should be understood that the above rejected network slices may include network slices rejected because they are unavailable in the first PLMN, network slices rejected because they are not available in the registration area where the terminal is located, or network slices rejected because they are not available in the first PLMN. At least one of the network slices that was rejected due to authentication and authorization failure or revocation.
例如，S101中，UE可根据来自于AMF的拒绝原因信息，获知被拒绝的网络切片的 拒绝原因，以获知被拒绝的网络切片为因在该第一PLMN内不可用而被拒绝的网络切片(对应的拒绝原因为在该第一PLMN内不可用)、因在该终端所在的注册区域内不可用而被拒绝的网络切片(对应的拒绝原因为在该终端所在的注册区域内不可用)或者因网络切片的验证和授权失败或撤销而被拒绝的网络切片(对应的拒绝原因为网络切片的验证和授权失败或撤销)。For example, in S101, the UE can learn the rejection reason of the rejected network slice according to the rejection reason information from the AMF, so as to know that the rejected network slice is the network slice rejected because it is not available in the first PLMN ( The corresponding rejection reason is not available in the first PLMN), network slices that are rejected because they are not available in the registration area where the terminal is located (the corresponding rejection reason is not available in the registration area where the terminal is located), or Network slices that are rejected due to network slice verification and authorization failure or revocation (corresponding rejection reason is network slice verification and authorization failure or revocation).
示例性的，拒绝原因信息对应于S-NSSAI，用于指示该S-NSSAI对应的网络切片的拒绝原因为：因在该第一PLMN内不可用而被拒绝、因在该终端所在的注册区域内不可用而被拒绝或者因网络切片的验证和授权失败或撤销而被拒绝。Exemplarily, the rejection reason information corresponds to the S-NSSAI, and is used to indicate that the rejection reason of the network slice corresponding to the S-NSSAI is: rejected because it is not available in the first PLMN, because it is in the registration area where the terminal is located Rejected due to unavailability of the network, or rejected due to failure or revocation of verification and authorization of the network slice.
应理解，一个被拒绝的网络切片的信息与拒绝原因之间的对应关系可以如表1所示。It should be understood that the correspondence between the information of a rejected network slice and the reason for rejection may be as shown in Table 1.
被拒绝的网络切片的信息Information about rejected network slices 拒绝原因Denial Reason
S-NSSAI_1S-NSSAI_1 在该第一PLMN内不可用Not available in this first PLMN
表1Table 1
其中，表1所示被拒绝的网络切片的信息与拒绝原因之间的对应关系，可由一个注册拒绝消息，注册接受(registration accept)消息，配置更新命令(configuration update request)消息或去注册请求消息指示。比如，该被拒绝的网络切片的信息与该拒绝原因携带于同一个注册请求消息或去注册请求消息中，或者，该被拒绝的网络切片的信息、该拒绝原因以及用于指示二者之间对应关系的信息携带于同一个注册请求消息或去注册请求消息中。Among them, the correspondence between the information of the rejected network slice and the reason for rejection shown in Table 1 can be a registration rejection message, registration acceptance (registration accept) message, configuration update request message or deregistration request message instruct. For example, the information of the rejected network slice and the reason for rejection are carried in the same registration request message or de-registration request message, or the information of the rejected network slice, the reason for rejection, and the information used to indicate the relationship between the two The information of the corresponding relationship is carried in the same registration request message or de-registration request message.
基于拒绝原因，UE可存储如表2所示的拒绝原因与第一PLMN关联的被拒绝的网络切片的信息。Based on the rejection reason, the UE may store the rejected network slice information associated with the first PLMN as the rejection reason shown in Table 2.
拒绝原因Denial Reason 被拒绝的网络切片的信息Information about rejected network slices
在该第一PLMN内不可用Not available in this first PLMN S-NSSAI_1、S-NSSAI_2S-NSSAI_1, S-NSSAI_2
在该终端所在的注册区域内不可用Not available in the registration area where the terminal is located S-NSSAI_3、S-NSSAI_4S-NSSAI_3, S-NSSAI_4
网络切片的验证和授权失败或撤销Network slice verification and authorization failed or revoked S-NSSAI_5S-NSSAI_5
表2Table 2
应理解，表2所示的拒绝原因，也可替换为拒绝原因对应的标识、编号或索引等。例如，通过标识1表示拒绝原因为在该第一PLMN内不可用，通过标识2表示拒绝原因为在该终端所在的注册区域内不可用，通过标识3表示拒绝原因为网络切片的验证和授权失败或撤销。It should be understood that the rejection reasons shown in Table 2 can also be replaced with the identification, number or index corresponding to the rejection reason. For example, identification 1 indicates that the reason for rejection is unavailable in the first PLMN, identification 2 indicates that the reason for rejection is unavailable in the registration area where the terminal is located, and identification 3 indicates that the reason for rejection is that the verification and authorization of the network slice failed. Or revoke.
当UE在第一PLMN进入去注册态后，UE可存储表2所示对应关系作为与第一PLMN相关联的被拒绝的网络切片的信息。After the UE enters the de-registered state in the first PLMN, the UE may store the corresponding relationship shown in Table 2 as the information of the rejected network slice associated with the first PLMN.
在S102的实施中，UE可在对第一PLMN进入去注册态后，保留因在该第一PLMN内不可用而被拒绝的网络切片的信息，例如，保留表2所示的S-NSSAI_1以及S-NSSAI_2。可选的，第一指示信息可用于指示UE在进入去注册态后，保留因在该第一PLMN内不可用而被拒绝的网络切片的信息。或者，可由UE默认接收到第一指示信息后，在进入第一PLMN进入去注册态后，保留因在该第一PLMN内不可用而被拒绝的网络切片的信息。In the implementation of S102, after the UE enters the de-registered state for the first PLMN, it retains the information of the network slices rejected because it is not available in the first PLMN, for example, retains S-NSSAI_1 and S-NSSAI_1 shown in Table 2. S-NSSAI_2. Optionally, the first indication information may be used to instruct the UE to retain information about the network slices that are rejected because they are not available in the first PLMN after entering the de-registered state. Alternatively, after the UE receives the first indication information by default, after entering the first PLMN and entering the de-registered state, the information of the network slices that are rejected due to being unavailable in the first PLMN is retained.
此外，UE可在对第一PLMN进入去注册态，且确定UE驻留的注册区域或跟踪区域未发生变化后，保留因在该终端所在的注册区域内不可用而被拒绝的网络切片的信息，例如，保留表2所示的S-NSSAI_3以及S-NSSAI_4。其中，UE驻留的注册区域或跟踪区域未发生变化，是指UE所在的注册区域在对第一PLMN进入去注册态后与发送第一注册请求消息以发起注册时未发生变化，或者UE所在的注册区域在进入去注册态后与发送第一注册请求消息以发起注册时未发生变化。其中，注册区域对应于至少一个跟踪区域(或者 说，注册区域由至少一个跟踪区域组成)，UE在某个注册区域内漫游时无需执行移动性注册(即位置注册)，换句话说，移出某个注册区域后需要执行移动性注册，跟踪区域由至少一个小区构成的区域，用于追踪UE的位置。In addition, after the UE enters the de-registration state for the first PLMN and determines that the registration area or tracking area where the UE resides has not changed, it retains the information of the network slices that are rejected because they are not available in the registration area where the terminal is located. , For example, keep S-NSSAI_3 and S-NSSAI_4 shown in Table 2. Among them, the registration area or tracking area where the UE resides has not changed, which means that the registration area where the UE is located has not changed after entering the de-registered state with the first PLMN and when the first registration request message is sent to initiate registration, or the UE is located After entering the de-registration state and sending the first registration request message to initiate registration, there is no change in the registration area of. Among them, the registration area corresponds to at least one tracking area (in other words, the registration area is composed of at least one tracking area), and the UE does not need to perform mobility registration (ie location registration) when roaming in a certain registration area, in other words, move out of a certain registration area. Mobility registration needs to be performed after each registration area. The tracking area is an area composed of at least one cell and is used to track the location of the UE.
可选的，第一指示信息可用于指示UE在进入去注册态且确定UE驻留的注册区域或跟踪区域未发生变化后，保留因在该终端所在的注册区域内不可用而被拒绝的网络切片的信息。或者，可由UE默认在对第一PLMN进入去注册态，且确定UE驻留的注册区域或跟踪区域未发生变化后，保留因在该终端所在的注册区域内不可用而被拒绝的网络切片的信息。Optionally, the first indication information may be used to instruct the UE to reserve the network rejected because it is unavailable in the registration area where the terminal is located after entering the de-registration state and determining that the registration area or tracking area where the UE resides has not changed Slice information. Alternatively, the UE may enter the de-registration state for the first PLMN by default, and after it is determined that the registration area or tracking area where the UE resides has not changed, the network slices that are rejected because they are not available in the registration area where the terminal is located are reserved. information.
在一种可能的示例中，若UE确定可用网络切片信息集合中的全部网络切片的信息均为被拒绝的网络切片的信息，则UE可向AMF发送第二注册请求消息，该第二注册请求消息中不包括网络切片的信息，或者说，该第二注册请求消息中不携带requested NSSAI。其中，可用网络切片信息集合具体是可用NSSAI集合，包括一个或多个S-NSSAI。可用NSSAI集合包括该第一PLMN准许的网络切片的信息(即第一PLMN对应的allowed NSSAI)、该第一PLMN配置的网络切片的信息(即第一PLMN对应的configured NSSAI)以及默认配置的网络切片的信息(即default configured NSSAI)。In a possible example, if the UE determines that the information of all network slices in the available network slice information set is the information of the rejected network slice, the UE may send a second registration request message to the AMF, the second registration request The message does not include network slice information, or in other words, the second registration request message does not carry requested NSSAI. Among them, the available network slice information set is specifically an available NSSAI set, including one or more S-NSSAIs. The available NSSAI set includes the information of the network slice permitted by the first PLMN (that is, the allowed NSSAI corresponding to the first PLMN), the information of the network slice configured by the first PLMN (that is, the configured NSSAI corresponding to the first PLMN), and the network configured by default Slice information (ie default configured NSSAI).
示例性的，若UE确定可用网络切片信息集合中的S-NSSAI，均属于被拒绝的NSSAI，则UE发送该第二注册请求消息。Exemplarily, if the UE determines that all the S-NSSAIs in the available network slice information set belong to the rejected NSSAI, the UE sends the second registration request message.
应理解，以上第二注册请求消息的发送，可在UE发送第一注册请求消息之后执行。比如，UE将可用网络切片信息集合中被拒绝的网络切片的信息以外的网络切片的信息，携带在第一注册请求消息中，并将第一注册请求消息发送至AMF，此后，若UE接收到来自于AMF的指示(如第一注册拒绝消息或第一去注册请求消息)，获知第一注册请求消息中的网络切片的信息均被拒绝，也就是，可用网络切片信息集合中的网络切片的信息均为被拒绝的网络切片的信息，则UE可向AMF发送该第二注册请求消息。此外，若UE在发送第一注册请求消息之前，可以确定可用网络切片信息集合中的网络切片的信息均为被拒绝的网络切片的信息，则UE可向AMF发送该第二注册请求消息，而不再发送第一注册请求消息。It should be understood that the sending of the above second registration request message may be performed after the UE sends the first registration request message. For example, the UE carries the information of the network slice other than the information of the rejected network slice in the available network slice information set in the first registration request message, and sends the first registration request message to the AMF. Thereafter, if the UE receives An instruction from AMF (such as the first registration rejection message or the first de-registration request message), it is learned that the network slice information in the first registration request message is rejected, that is, the network slice information in the network slice information set can be used. The information is the information of the rejected network slice, and the UE may send the second registration request message to the AMF. In addition, if the UE can determine that the network slice information in the available network slice information set is the information of the rejected network slice before sending the first registration request message, the UE can send the second registration request message to the AMF, and The first registration request message is no longer sent.
当AMF接收到该第二注册请求消息后，AMF可向UE发送第二指示信息。其中，第二指示信息可用于指示UE关闭N1模式能力(disable N1mode capability)。UE可在接收到该第二指示信息后，根据第二指示信息关闭N1模式能力。此后UE不再尝试在5G网络进行注册，UE可向长期演进(long term evolution，LTE)网络等请求注册，提高UE的网络注册的效率。比如，UE在短时间(例如UE自己定义的一个时间长度)内不会重新启用尝试N1模式能力。应理解，当N1模式能力开启时，UE处于N1模式，处于N1模式的UE才能通过5G接入网接入5G核心网。After the AMF receives the second registration request message, the AMF may send the second indication information to the UE. Among them, the second indication information may be used to instruct the UE to disable N1 mode capability (disable N1 mode capability). After receiving the second indication information, the UE may turn off the N1 mode capability according to the second indication information. After that, the UE no longer attempts to register on the 5G network, and the UE can request registration from a long term evolution (LTE) network, etc., so as to improve the efficiency of the UE's network registration. For example, the UE will not re-enable the ability to try the N1 mode in a short period of time (for example, a time length defined by the UE itself). It should be understood that when the N1 mode capability is enabled, the UE is in the N1 mode, and the UE in the N1 mode can access the 5G core network through the 5G access network.
或者，在AMF接收到该第二注册请求消息后，AMF可向UE发送第三指示信息。第三指示信息可用于指示无可用的默认网络切片，其中，无可用的默认网络切片例如，无default configured NSSAI，或者default configured NSSAI均不可用。UE可在接收到该第三指示信息后，根据第三指示信息关闭N1模式能力，并从第一PLMN选择至第二PLMN。其中，第一PLMN和第二PLMN可以相同或不同。Alternatively, after the AMF receives the second registration request message, the AMF may send the third indication information to the UE. The third indication information may be used to indicate that there is no available default network slice, where there is no available default network slice, for example, no default configured NSSAI, or default configured NSSAI is not available. After receiving the third indication information, the UE may turn off the N1 mode capability according to the third indication information, and select from the first PLMN to the second PLMN. Wherein, the first PLMN and the second PLMN may be the same or different.
示例性的，在从第一PLMN选择至第二PLMN后，UE可保存第一PLMN的信息。例如，第一PLMN的信息可以是第一PLMN的标识(identity，ID)。Exemplarily, after selecting from the first PLMN to the second PLMN, the UE may save the information of the first PLMN. For example, the information of the first PLMN may be the identity (ID) of the first PLMN.
示例性的，第三指示信息为异常情况(abnormal case)指示信息，用于指示当前为异常情况。Exemplarily, the third indication information is abnormal case indication information, which is used to indicate that the current abnormal situation is present.
例如，UE可在接收到该第三指示信息的次数达到阈值(如5次)后，关闭N1模式能力，并从第一PLMN选择至第二PLMN。这里接收到该第三指示信息的次数，可以是指UE在请求注册到第一PLMN的过程中，接收到第三指示信息的次数。For example, the UE may turn off the N1 mode capability and select from the first PLMN to the second PLMN after the number of times of receiving the third indication information reaches a threshold (for example, 5 times). The number of times the third indication information is received here may refer to the number of times the UE has received the third indication information during the process of requesting to register with the first PLMN.
其中，UE可在每次接收到第三指示信息后，对第三指示信息的计数器(如注册尝试计数器(registration attempt counter))的计数值进行增一处理，当该计数器的计数达到阈值后，UE关闭N1模式能力，并执行PLMN选择。其中，当UE注册成功(如介绍到注册成功消息)或执行PLMN选择后，UE将该计数器的计数值置为零。Wherein, the UE may increase the count value of the counter of the third indication information (such as the registration attempt counter) each time after receiving the third indication information, and when the count of the counter reaches the threshold, The UE turns off the N1 mode capability and performs PLMN selection. Among them, when the UE is successfully registered (for example, the registration success message is introduced) or PLMN selection is performed, the UE sets the count value of the counter to zero.
此外，UE也可在首次接收到第三指示信息后，关闭N1模式能力，并从第一PLMN选择至第二PLMN，而无需判断接收到该第三指示信息的次数是否达到阈值，进一步提高注册效率。In addition, the UE can also turn off the N1 mode capability after receiving the third indication information for the first time, and select from the first PLMN to the second PLMN, without determining whether the number of times the third indication information has been received reaches the threshold, and further improve the registration efficient.
应理解，第三指示信息还可用于指示UE关闭N1模式能力。第三指示信息还可用于指示UE在从第一PLMN执行PLMN选择后，保留第一PLMN的信息。It should be understood that the third indication information may also be used to instruct the UE to turn off the N1 mode capability. The third indication information may also be used to instruct the UE to retain the information of the first PLMN after performing PLMN selection from the first PLMN.
或者，在AMF接收到该第二注册请求消息后，AMF可向UE发送第四指示信息。第四指示信息可用于指示UE执行PLMN选择。UE可在接收到该第四指示信息后，根据第四指示信息从第一PLMN选择至第二PLMN。其中，第一PLMN和第二PLMN可以相同或不同。Alternatively, after the AMF receives the second registration request message, the AMF may send fourth indication information to the UE. The fourth indication information may be used to instruct the UE to perform PLMN selection. After receiving the fourth indication information, the UE may select from the first PLMN to the second PLMN according to the fourth indication information. Wherein, the first PLMN and the second PLMN may be the same or different.
示例性的，在从第一PLMN选择至第二PLMN后，UE可保存第一PLMN的信息。Exemplarily, after selecting from the first PLMN to the second PLMN, the UE may save the information of the first PLMN.
应理解，第四指示信息还可用于指示UE在从第一PLMN执行PLMN选择后，保留第一PLMN的信息。例如，第一PLMN的信息可以是第一PLMN的标识。It should be understood that the fourth indication information may also be used to instruct the UE to retain the information of the first PLMN after performing PLMN selection from the first PLMN. For example, the information of the first PLMN may be the identity of the first PLMN.
在接收上述第三指示信息或第四指示信息后，UE可在从第一PLMN选择至第二PLMN之后，保留第一PLMN的信息。该第一PLMN的信息可用于识别第二PLMN是否与第一PLMN一致。当UE识别第一PLMN与第二PLMN一致后，第一PLMN可关闭N1模式能力，以避免重复地在第一PLMN中请求注册，能够提高注册效率。After receiving the above-mentioned third indication information or fourth indication information, the UE may retain the information of the first PLMN after selecting from the first PLMN to the second PLMN. The information of the first PLMN can be used to identify whether the second PLMN is consistent with the first PLMN. After the UE recognizes that the first PLMN is consistent with the second PLMN, the first PLMN can turn off the N1 mode capability to avoid repeated requests for registration in the first PLMN, which can improve registration efficiency.
可选的，上述第三指示信息或第四指示信息还可用于指示UE在从第一PLMN执行PLMN选择后，保留第一PLMN的信息。或者，可由UE默认接收到第三指示信息或第四指示信息，且在从第一PLMN选择至第二PLMN后，保留第一PLMN的信息。Optionally, the foregoing third indication information or fourth indication information may also be used to instruct the UE to retain the information of the first PLMN after performing PLMN selection from the first PLMN. Alternatively, the UE may receive the third indication information or the fourth indication information by default, and after selecting from the first PLMN to the second PLMN, the information of the first PLMN is retained.
此外，UE也可在确定可用网络切片信息集合中的网络切片的信息均为被拒绝的网络切片的信息后，关闭N1模式能力，并从第一PLMN选择至第二PLMN。在选择至第二PLMN后，UE可保存第一PLMN的信息。In addition, the UE may also turn off the N1 mode capability and select from the first PLMN to the second PLMN after determining that the information of the network slice in the available network slice information set is all the information of the rejected network slice. After selecting the second PLMN, the UE may save the information of the first PLMN.
另外，UE在从第一PLMN选择至第二PLMN时，也可根据第一PLMN的信息选择与第一PLMN不同的PLMN作为第二PLMN，以避免重复在第一PLMN请求注册。In addition, when the UE selects from the first PLMN to the second PLMN, it may also select a PLMN that is different from the first PLMN as the second PLMN according to the information of the first PLMN, so as to avoid repeating requests for registration in the first PLMN.
在一种可能的示例中，UE可将第一PLMN的信息存储至第一PLMN列表，该第一PLMN列表包括没有可用网络切片的PLMN，或者说，第一PLMN列表中的PLMN中没有可用网络切片。应理解，该第一PLMN列表至少保留到UE选择至第二PLMN之后。In a possible example, the UE may store the information of the first PLMN in the first PLMN list, and the first PLMN list includes PLMNs with no available network slices, or in other words, there are no available networks among the PLMNs in the first PLMN list. slice. It should be understood that the first PLMN list is retained at least until the UE selects the second PLMN.
应理解，UE可将尝试注册但注册失败的PLMN的信息存储至第一PLMN列表。这里的注册失败的PLMN是指，因为PLMN对应的可用网络切片信息集合中的网络切片的信息均被拒绝而无法注册的PLMN。比如，UE在第三PLMN尝试注册，由于可用网络切片信息集合中的网络切片的信息均被第三PLMN拒绝，则UE执行PLMN选择，从第三PLMN 选择至第一PLMN，并将第三PLMN的信息存储至该第一PLMN列表。It should be understood that the UE may store the information of the PLMN that tried to register but failed to register in the first PLMN list. The PLMN that fails to register here refers to a PLMN that cannot be registered because the information of the network slice in the available network slice information set corresponding to the PLMN is rejected. For example, the UE attempts to register in the third PLMN, and because the network slice information in the available network slice information set is rejected by the third PLMN, the UE performs PLMN selection, selects from the third PLMN to the first PLMN, and selects the third PLMN The information is stored in the first PLMN list.
示例性的，在从第一PLMN选择到第二PLMN的过程中，UE可根据第一PLMN列表确定该第二PLMN，其中，第二PLMN不包括在第一PLMN列表中。或者说，UE可从不包括在第一PLMN列表的PLMN中确定第二PLMN，以避免再次选择到没有可用网络切片的PLMN，提高注册效率。Exemplarily, in the process of selecting from the first PLMN to the second PLMN, the UE may determine the second PLMN according to the first PLMN list, where the second PLMN is not included in the first PLMN list. In other words, the UE may determine the second PLMN from the PLMNs that are not included in the first PLMN list, so as to avoid re-selecting PLMNs with no available network slices and improve registration efficiency.
当UE从第一PLMN选择至第一PLMN列表中的PLMN时，UE可关闭N1模式能力，以避免重复地请求注册到第一PLMN列表中PLMN，能够提高注册效率。When the UE selects a PLMN in the first PLMN list from the first PLMN, the UE can turn off the N1 mode capability to avoid repeated requests to register to the PLMN in the first PLMN list, which can improve registration efficiency.
在另外的可能的示例中，若AMF接收到来自于UE的注册请求消息(如前述第一注册请求消息或第二注册请求消息)，且确定UE无网络切片可用(比如，AMF确定注册请求消息携带的网络切片的信息均被拒绝，或确定该注册请求消息未携带网络切片的信息)，还可由AMF向UE发送第五指示信息，用于指示至少一个网络切片的信息，该至少一个网络切片的信息可被称为引导(steering)网络切片的信息或其他名称。比如，引导网络切片的信息为AMF根据切片类型(Slice/Service type)确定的与该UE请求注册的网络切片的类型相同的网络切片。In another possible example, if the AMF receives a registration request message from the UE (such as the aforementioned first registration request message or the second registration request message), and it is determined that the UE has no network slice available (for example, the AMF determines that the registration request message The carried network slice information is rejected, or it is determined that the registration request message does not carry network slice information), and the AMF may also send fifth indication information to the UE, which is used to indicate the information of at least one network slice, and the at least one network slice The information can be referred to as steering network slice information or other names. For example, the information for guiding the network slice is a network slice that is determined by the AMF according to the slice type (Slice/Service type) and is the same as the type of the network slice that the UE requests to register.
示例性的，第五指示信息可包括至少一个引导NSSAI，每个引导NSSAI包括至少一个引导S-NSSAI，引导S-NSSAI的数量不超过第一注册请求消息中携带的requested S-NSSAI的数量。UE在接收到引导NSSAI后，可向AMF发送第三注册请求消息，其中携带引导NSSAI包括的至少一个S-NSSAI，用于请求注册到至少一个S-NSSAI指示的网络切片。Exemplarily, the fifth indication information may include at least one guided NSSAI, each guided NSSAI includes at least one guided S-NSSAI, and the number of guided S-NSSAIs does not exceed the number of requested S-NSSAIs carried in the first registration request message. After receiving the guided NSSAI, the UE may send a third registration request message to the AMF, which carries at least one S-NSSAI included in the guided NSSAI, and is used to request registration to the network slice indicated by the at least one S-NSSAI.
应理解，AMF可在接收到第一注册请求消息或第二注册请求消息后，向UE发送第五指示信息，以指示UE通过引导网络切片的信息发起注册，以提高注册效率。其中，AMF还可将第五指示信息以及S101所示的至少一个被拒绝的网络切片的信息以及第一指示信息携带在同一消息中发生，该同一消息例如第一注册拒绝消息或第一去注册请求消息。It should be understood that after receiving the first registration request message or the second registration request message, the AMF may send fifth indication information to the UE to instruct the UE to initiate registration by guiding the network slice information, so as to improve registration efficiency. Wherein, the AMF may also carry the fifth indication information and the information of the at least one rejected network slice shown in S101 and the first indication information in the same message, such as the first registration rejection message or the first deregistration message. Request message.
下面以AMF为第一PLMN中的AMF为例，结合流程图对本申请实施例提供的通信方法进行说明。In the following, taking AMF as the AMF in the first PLMN as an example, the communication method provided in the embodiment of the present application will be described with reference to a flowchart.
示例性的，如图3所示，本申请实施例提供的一种通信方法可包括以下步骤：Exemplarily, as shown in FIG. 3, a communication method provided in an embodiment of the present application may include the following steps:
S201：UE向AMF发送第一注册请求消息。S201: The UE sends a first registration request message to the AMF.
其中，若第一注册请求消息中携带了requested NSSAI，requested NSSAI包括多个S-NSSAI，且AMF判断requested NSSAI提供的多个S-NSSAI皆不可用，则执行以下步骤S202-S204。requested NSSAI可包括allowed NSSAI、configured NSSAI和/或default configured NSSAI中的S-NSSAI。Wherein, if the first registration request message carries the requested NSSAI, the requested NSSAI includes multiple S-NSSAIs, and the AMF determines that none of the multiple S-NSSAIs provided by the requested NSSAI are available, then the following steps S202-S204 are executed. The requested NSSAI may include S-NSSAI in allowed NSSAI, configured NSSAI, and/or default configured NSSAI.
若第一注册请求消息中未携带requested NSSAI，且AMF确定无该UE可用的默认配置的S-NSSAI，则执行以下步骤S205-S206。If the first registration request message does not carry the requested NSSAI, and the AMF determines that there is no S-NSSAI with the default configuration available for the UE, the following steps S205-S206 are executed.
其中，若网络侧没有配置默认的订阅S-NSSAI(default subscribed S-NSSAI)，则AMF可确定无该UE可用的默认配置的S-NSSAI；或者，在UE不支持网络特定切片验证及授权的情况下，网络侧虽然配置有默认的订阅S-NSSAI，但所有默认的订阅S-NSSAI都需要进行网络特定切片验证及授权，由于UE不支持网络特定切片验证及授权，AMF可确定无该UE可用的默认配置的S-NSSAI。Among them, if the network side does not configure the default subscribed S-NSSAI (default subscribed S-NSSAI), the AMF can determine that there is no S-NSSAI with the default configuration available for the UE; or, the UE does not support network-specific slice authentication and authorization. In this case, although the default subscription S-NSSAI is configured on the network side, all default subscription S-NSSAIs require network-specific slice verification and authorization. Since the UE does not support network-specific slice verification and authorization, AMF can determine that there is no such UE S-NSSAI with default configuration available.
S202：AMF向UE发送注册拒绝消息。S202: The AMF sends a registration rejection message to the UE.
该注册拒绝消息中，携带配置为“#62"No network slices available"”的原因值、rejected  NSSAI IE以及第一指示信息。其中，rejected NSSAI IE用于携带被拒绝的NSSAI，第一指示信息用于指示rejected NSSAI IE中携带的被拒绝的NSSAI需保存。The registration rejection message carries the reason value configured as "#62"No network slices available"", rejected NSSAI IE, and first indication information. Among them, the rejected NSSAI IE is used to carry the rejected NSSAI, and the first indication information is used to indicate that the rejected NSSAI carried in the rejected NSSAI IE needs to be saved.
S203：UE存储rejected NSSAI。S203: The UE stores the rejected NSSAI.
之后UE可以继续在第一PLMN尝试注册，如果满足PLMN选择条件，比如，UE接收到的第三指示信息的次数达到阈值，或者接收到来自于AMF的PLMN选择指示信息，则UE可执行PLMN选择。当UE执行PLMN选择后，UE才会删除被拒绝的NSSAI。After that, the UE can continue to try to register in the first PLMN. If the PLMN selection conditions are met, for example, the number of times the UE has received the third indication information reaches the threshold, or the PLMN selection indication information from the AMF is received, the UE may perform PLMN selection . After the UE performs PLMN selection, the UE will delete the rejected NSSAI.
S204：UE向AMF发送第二注册请求消息。S204: The UE sends a second registration request message to the AMF.
其中，若UE确定可用NSSAI集合中的S-NSSAI均属于被拒绝的NSSAI，则UE向AMF发送的第二注册请求消息中不包括网络切片的信息，或者说，该第二注册请求消息中不携带requested NSSAI，若AMF根据第二注册请求消息，确定无该UE可用的默认配置的S-NSSAI，则可执行以上步骤S204-S205。若确定可用NSSAI集合包括非被拒绝的S-NSSAI，则UE向AMF发送的第二注册请求消息中包括非被拒绝的S-NSSAI，以请求注册到非被拒绝的网络切片。Among them, if the UE determines that all S-NSSAIs in the available NSSAI set belong to rejected NSSAIs, the second registration request message sent by the UE to the AMF does not include network slice information, or in other words, the second registration request message does not Carrying the requested NSSAI, if the AMF determines that there is no S-NSSAI with the default configuration available for the UE according to the second registration request message, the above steps S204-S205 can be performed. If it is determined that the available NSSAI set includes the non-rejected S-NSSAI, the second registration request message sent by the UE to the AMF includes the non-rejected S-NSSAI to request registration to the non-rejected network slice.
其中，可用NSSAI集合中的NSSAI，包括allowed NSSAI以及configured NSSAI。非被拒绝的S-NSSAI不属于被拒绝的NSSAI。Among them, the available NSSAIs in the NSSAI set include allowed NSSAI and configured NSSAI. The non-rejected S-NSSAI does not belong to the rejected NSSAI.
S205：AMF确定无该UE可用的默认配置的S-NSSAI，则向UE发送第三指示信息。S205: The AMF determines that there is no S-NSSAI with a default configuration available for the UE, and then sends third indication information to the UE.
例如，第三指示信息为异常情况指示信息。For example, the third indication information is abnormal situation indication information.
S206：若UE确定接收到第三指示信息的次数达到阈值(5次)，则UE关闭N1模式能力，以执行PLMN选择。否则，若UE确定接收到第三指示信息的次数未达到阈值，则UE继续在第一PLMN尝试注册，例如，UE再次执行S204。S206: If the UE determines that the number of times of receiving the third indication information reaches the threshold (5 times), the UE turns off the N1 mode capability to perform PLMN selection. Otherwise, if the UE determines that the number of times the third indication information has been received has not reached the threshold, the UE continues to try to register in the first PLMN, for example, the UE performs S204 again.
采用以上图3所示流程，在尝试根据所有属于allowed NSSAI以及configured NSSAI的S-NSSAI进行注册的基础上，由于UE在执行PLMN选择之前均保存rejected NSSAI，UE能够判断被拒NSSAI。假如UE判断allowed NSSAI以及configured NSSAI中没有可用的S-NSSAI(如allowed NSSAI以及configured NSSAI中全部的S-NSSAI均包括在rejected NSSAI中，或者allowed NSSAI以及configured NSSAI中没有S-NSSAI)，则UE在请求注册时发送的registration request中不携带requested NSSAI，此后AMF可接受注册并提供new configured NSSAI，或者，AMF可拒绝并向UE指示发生异常情况。当发生异常情况次数达到阈值后，UE关闭N1模式能力，切换到S1模式，执行PLMN重选，删除保存的rejected NSSAI信息。Using the process shown in Figure 3 above, after attempting to register based on all S-NSSAIs belonging to allowed NSSAI and configured NSSAI, since the UE saves rejected NSSAI before performing PLMN selection, the UE can determine the rejected NSSAI. If the UE determines that there is no S-NSSAI available in allowed NSSAI and configured NSSAI (such as allowed NSSAI and configured NSSAI, all S-NSSAIs are included in rejected NSSAI, or allowed NSSAI and configured NSSAI do not have S-NSSAI), then the UE The registration request sent when requesting registration does not carry the requested NSSAI. After that, the AMF can accept registration and provide new configured NSSAI, or the AMF can reject it and indicate to the UE that an abnormal situation has occurred. When the number of occurrences of abnormal situations reaches the threshold, the UE closes the N1 mode capability, switches to the S1 mode, performs PLMN reselection, and deletes the saved rejected NSSAI information.
此外，与图3所示流程不同，UE也可在收到第三指示信息后执行PLMN选择，而无须判断接收第三指示信息的次数是否达到阈值。例如图4所示，本申请实施例提供的一种通信方法可包括以下步骤：In addition, unlike the process shown in FIG. 3, the UE may also perform PLMN selection after receiving the third indication information, without determining whether the number of times of receiving the third indication information reaches the threshold. For example, as shown in FIG. 4, a communication method provided by an embodiment of the present application may include the following steps:
S301：UE向AMF发送第一注册请求消息。S301: The UE sends a first registration request message to the AMF.
其中，若第一注册请求消息中携带了requested NSSAI，requested NSSAI包括多个S-NSSAI，且AMF判断requested NSSAI提供的多个S-NSSAI皆不可用，则执行以下步骤S302-S304。requested NSSAI可包括allowed NSSAI、configured NSSAI和/或default configured NSSAI中的S-NSSAI。Wherein, if the first registration request message carries the requested NSSAI, the requested NSSAI includes multiple S-NSSAIs, and the AMF determines that none of the multiple S-NSSAIs provided by the requested NSSAI are available, then the following steps S302-S304 are executed. The requested NSSAI may include S-NSSAI in allowed NSSAI, configured NSSAI, and/or default configured NSSAI.
若第一注册请求消息中未携带requested NSSAI，且AMF确定无该UE可用的默认配置的S-NSSAI，则执行以下步骤S305-S306。If the first registration request message does not carry the requested NSSAI, and the AMF determines that there is no S-NSSAI with the default configuration available for the UE, the following steps S305-S306 are executed.
S302：AMF向UE发送注册拒绝消息。S302: The AMF sends a registration rejection message to the UE.
该注册拒绝消息中，携带配置为“#62"No network slices available"”的原因值、rejected NSSAI IE以及第一指示信息。其中，rejected NSSAI IE用于携带rejected NSSAI，第一指示信息用于指示rejected NSSAI IE中携带的rejected NSSAI需保存。The registration rejection message carries the reason value configured as "#62"No network slices available"", rejected NSSAI IE, and first indication information. Among them, the rejected NSSAI IE is used to carry rejected NSSAI, and the first indication information is used to indicate that the rejected NSSAI carried in the rejected NSSAI IE needs to be stored.
S303：UE存储rejected NSSAI。之后UE继续在第一PLMN尝试注册。S303: The UE stores the rejected NSSAI. After that, the UE continues to try to register in the first PLMN.
当UE执行PLMN选择后，UE才会删除rejected NSSAI。After the UE performs PLMN selection, the UE will delete the rejected NSSAI.
S304：UE向AMF发送第二注册请求消息。S304: The UE sends a second registration request message to the AMF.
其中，若UE确定可用NSSAI集合中的S-NSSAI均属于被拒绝的NSSAI，则UE向AMF发送的第二注册请求消息中不包括网络切片的信息，或者说，该第二注册请求消息中不携带requested NSSAI，若AMF根据第二注册请求消息，确定无该UE可用的默认配置的S-NSSAI，则可执行步骤S305-S306。若UE确定可用NSSAI集合包括非被拒绝的S-NSSAI，则UE向AMF发送的第二注册请求消息中包括非被拒绝的S-NSSAI，以请求注册到非被拒绝的网络切片。Among them, if the UE determines that all S-NSSAIs in the available NSSAI set belong to rejected NSSAIs, the second registration request message sent by the UE to the AMF does not include network slice information, or in other words, the second registration request message does not Carrying the requested NSSAI, if the AMF determines that there is no S-NSSAI with the default configuration available for the UE according to the second registration request message, steps S305-S306 can be performed. If the UE determines that the available NSSAI set includes the non-rejected S-NSSAI, the second registration request message sent by the UE to the AMF includes the non-rejected S-NSSAI to request registration to the non-rejected network slice.
S305：AMF确定无该UE可用的默认配置的S-NSSAI，则向UE发送第三指示信息。S305: The AMF determines that there is no S-NSSAI with the default configuration available for the UE, and then sends third indication information to the UE.
例如，第三指示信息为异常情况指示信息。For example, the third indication information is abnormal situation indication information.
S306：UE根据第三指示信息关闭N1模式能力，执行PLMN选择。S306: The UE turns off the N1 mode capability according to the third indication information, and performs PLMN selection.
采用以上图4所示流程，在尝试根据所有属于allowed NSSAI以及configured NSSAI的S-NSSAI进行注册的基础上，由于UE在执行PLMN选择之前均保存rejected NSSAI，UE能够判断被拒NSSAI。假如UE判断allowed NSSAI以及configured NSSAI中没有可用的S-NSSAI，则UE在请求注册时发送的registration request中不携带requested NSSAI，此后AMF可接受注册并提供new configured NSSAI，或者，AMF可拒绝并向UE指示发生异常情况。当发生异常情况后，UE关闭N1模式能力，切换到S1模式，执行PLMN重选，删除保存的rejected NSSAI信息。Using the process shown in Figure 4 above, after attempting to register based on all S-NSSAIs belonging to allowed NSSAI and configured NSSAI, since the UE saves rejected NSSAI before performing PLMN selection, the UE can determine the rejected NSSAI. If the UE determines that there is no S-NSSAI available in allowed NSSAI and configured NSSAI, the registration request sent by the UE when requesting registration does not carry the requested NSSAI. After that, AMF can accept registration and provide new configured NSSAI, or AMF can reject it and send it to The UE indicates that an abnormal situation has occurred. When an abnormal situation occurs, the UE closes the N1 mode capability, switches to the S1 mode, performs PLMN reselection, and deletes the saved rejected NSSAI information.
在图3或图4基础上，AMF还可向UE提供引导NSSAI，由UE根据引导NSSAI中的至少一个S-NSSAI发起注册请求，以提高注册效率。如图5所示，本申请实施例提供的一种通信方法可包括以下步骤：On the basis of FIG. 3 or FIG. 4, the AMF may also provide a guided NSSAI to the UE, and the UE initiates a registration request according to at least one S-NSSAI in the guided NSSAI to improve registration efficiency. As shown in FIG. 5, a communication method provided by an embodiment of the present application may include the following steps:
S401：UE向AMF发送第一注册请求消息。S401: The UE sends a first registration request message to the AMF.
其中，若第一注册请求消息中携带了requested NSSAI，requested NSSAI包括多个S-NSSAI，且AMF判断requested NSSAI提供的多个S-NSSAI皆不可用，则执行以下步骤S402-S407。requested NSSAI可包括allowed NSSAI、configured NSSAI和/或default configured NSSAI中的S-NSSAI。Wherein, if the first registration request message carries the requested NSSAI, the requested NSSAI includes multiple S-NSSAIs, and the AMF determines that none of the multiple S-NSSAIs provided by the requested NSSAI are available, then the following steps S402-S407 are executed. The requested NSSAI may include S-NSSAI in allowed NSSAI, configured NSSAI, and/or default configured NSSAI.
若第一注册请求消息中未携带requested NSSAI，且AMF确定无该UE可用的默认配置的S-NSSAI，则执行以下步骤S408-S409。If the first registration request message does not carry the requested NSSAI, and the AMF determines that there is no S-NSSAI with the default configuration available for the UE, the following steps S408-S409 are executed.
S402：AMF根据requested NSSAI确定至少一个引导NSSAI，每个引导NSSAI包括至少一个引导S-NSSAI。S402: The AMF determines at least one guided NSSAI according to the requested NSSAI, and each guided NSSAI includes at least one guided S-NSSAI.
比如，引导S-NSSAI指示的网络切片的类型与requested NSSAI指示的网络切片的类型相同。For example, the type of the network slice indicated by the bootstrap S-NSSAI is the same as the type of the network slice indicated by the requested NSSAI.
S403：AMF向UE发送注册拒绝消息，注册拒绝消息中包括引导NSSAI IE，用于携带至少一个引导NSSAI。S403: The AMF sends a registration rejection message to the UE. The registration rejection message includes a guided NSSAI IE, which is used to carry at least one guided NSSAI.
该注册拒绝消息中，携带配置为“#62"No network slices available"”的原因值、rejected NSSAI IE以及第一指示信息。其中，rejected NSSAI IE用于携带rejected NSSAI，第一指 示信息用于指示rejected NSSAI IE中携带的rejected NSSAI需保存。The registration rejection message carries the reason value configured as "#62"No network slices available"", rejected NSSAI IE, and first indication information. Among them, the rejected NSSAI IE is used to carry rejected NSSAI, and the first indication information is used to indicate that the rejected NSSAI carried in the rejected NSSAI IE needs to be saved.
S404：UE存储rejected NSSAI。之后UE继续在第一PLMN尝试注册。S404: The UE stores the rejected NSSAI. After that, the UE continues to try to register in the first PLMN.
当UE执行PLMN选择后，UE才会删除rejected NSSAI。After the UE performs PLMN selection, the UE will delete the rejected NSSAI.
S405：UE在allowed NSSAI中添加引导S-NSSAI。S405: The UE adds a guided S-NSSAI to the allowed NSSAI.
比如，若allowed NSSAI中包括属于rejected NSSAI的S-NSSAI，则UE可将allowed NSSAI中且属于rejected NSSAI的S-NSSAI，替换为引导S-NSSAI。其中，若第一注册请求中包括属于allowed NSSAI的S-NSSAI，且该S-NSSAI属于注册拒绝消息中的rejected NSSAI IE，则UE确定该S-NSSAI属于rejected NSSAI。For example, if the allowed NSSAI includes the S-NSSAI belonging to the rejected NSSAI, the UE may replace the S-NSSAI belonging to the rejected NSSAI in the allowed NSSAI with the guided S-NSSAI. Wherein, if the first registration request includes an S-NSSAI belonging to allowed NSSAI, and the S-NSSAI belongs to the rejected NSSAI IE in the registration rejection message, the UE determines that the S-NSSAI belongs to rejected NSSAI.
S406：UE向AMF发送第三注册请求消息，第三注册请求消息包括至少一个引导S-NSSAI的信息。S406: The UE sends a third registration request message to the AMF, where the third registration request message includes at least one information for guiding the S-NSSAI.
如果第三注册请求消息仍然被拒绝，且拒绝原因为“#62"No network slices available"”，则UE可执行S407。比如，UE在接收到针对第三注册请求消息的拒绝原因为“#62"No network slices available"”的注册拒绝消息后，执行S407。If the third registration request message is still rejected, and the rejection reason is "#62"No network slices available"", the UE may perform S407. For example, the UE executes S407 after receiving a registration rejection message with a rejection reason of "#62"No network slices available"" for the third registration request message.
如果第三注册请求消息被接受，则在S406之后AMF可向UE发送注册接受消息，标识成功注册到引导NSSAI对应的网络切片，不再执行S407。If the third registration request message is accepted, after S406, the AMF may send a registration acceptance message to the UE to indicate successful registration to the network slice corresponding to the guided NSSAI, and S407 is not executed any more.
S407：UE向AMF发送第二注册请求消息。S407: The UE sends a second registration request message to the AMF.
其中，若UE确定可用NSSAI集合中的S-NSSAI均属于被拒绝的NSSAI，则UE向AMF发送的第二注册请求消息中不包括网络切片的信息，或者说，该第二注册请求消息中不携带requested NSSAI，若AMF根据第二注册请求消息，确定无该UE可用的默认配置的S-NSSAI，则可执行步骤S408-S409。若UE确定可用NSSAI集合包括非被拒绝的S-NSSAI，则UE向AMF发送的第二注册请求消息中包括非被拒绝的S-NSSAI，以请求注册到非被拒绝的网络切片。Among them, if the UE determines that all S-NSSAIs in the available NSSAI set belong to rejected NSSAIs, the second registration request message sent by the UE to the AMF does not include network slice information, or in other words, the second registration request message does not Carrying the requested NSSAI, if the AMF determines that there is no S-NSSAI with the default configuration available for the UE according to the second registration request message, steps S408-S409 may be performed. If the UE determines that the available NSSAI set includes the non-rejected S-NSSAI, the second registration request message sent by the UE to the AMF includes the non-rejected S-NSSAI to request registration to the non-rejected network slice.
其中，可用NSSAI集合中的NSSAI，包括allowed NSSAI以及configured NSSAI。非被拒绝的NSSAI，是指UE存储的rejected NSSAI以外的NSSAI。Among them, the available NSSAIs in the NSSAI set include allowed NSSAI and configured NSSAI. The non-rejected NSSAI refers to the NSSAI other than the rejected NSSAI stored by the UE.
S408：AMF向UE发送第三指示信息。S408: The AMF sends third indication information to the UE.
例如，第三指示信息为异常情况指示信息。For example, the third indication information is abnormal situation indication information.
S409：UE根据第三指示信息关闭N1模式能力，执行PLMN选择。S409: The UE turns off the N1 mode capability according to the third indication information, and performs PLMN selection.
采用以上图5所示流程，在尝试根据所有属于allowed NSSAI以及configured NSSAI的S-NSSAI进行注册的基础上，由于UE在执行PLMN选择之前均保存rejected NSSAI，UE能够判断被拒NSSAI。此外，可由AMF向UE提供引导S-NASSI，由UE将引导S-NASSI作为allowed NSSAI中的S-NASSI，并优先根据引导S-NASSI请求注册。如果UE仍然判断allowed NSSAI以及configured NSSAI中没有可用的S-NSSAI，则UE在请求注册时发送的registration request中不携带requested NSSAI，此后AMF可接受注册并提供new configured NSSAI，或者，AMF可拒绝并向UE指示发生异常情况。当发生异常情况次数达到阈值后，UE关闭N1模式能力，切换到S1模式，执行PLMN重选，删除保存的rejected NSSAI信息。Using the process shown in Figure 5 above, after attempting to register based on all S-NSSAIs belonging to allowed NSSAI and configured NSSAI, since the UE saves rejected NSSAI before performing PLMN selection, the UE can determine the rejected NSSAI. In addition, the AMF can provide the UE with a guided S-NASSI, and the UE will use the guided S-NASSI as the allowed S-NASSI in the NSSAI, and request registration based on the guided S-NASSI first. If the UE still judges that there is no S-NSSAI available in allowed NSSAI and configured NSSAI, the registration request sent by the UE when requesting registration does not carry the requested NSSAI. After that, AMF can accept registration and provide new configured NSSAI, or AMF can reject and Indicates to the UE that an abnormal situation has occurred. When the number of occurrences of abnormal situations reaches the threshold, the UE closes the N1 mode capability, switches to the S1 mode, performs PLMN reselection, and deletes the saved rejected NSSAI information.
在图3-图5基础上，若UE无法成功注册到第一PLMN，则可在执行PLMN选择后保留第一PLMN的信息，以便识别执行PLMN选择后是否仍然选择到了该第一PLMN。例如图6所示，本申请实施例提供的一种通信方法可包括以下步骤：On the basis of Figure 3 to Figure 5, if the UE cannot successfully register to the first PLMN, the information of the first PLMN can be retained after the PLMN selection is performed, so as to identify whether the first PLMN is still selected after the PLMN selection is performed. For example, as shown in FIG. 6, a communication method provided by an embodiment of the present application may include the following steps:
S501：UE向AMF发送第一注册请求消息。S501: The UE sends a first registration request message to the AMF.
其中，若第一注册请求消息中携带了requested NSSAI，requested NSSAI包括多个S-NSSAI，且AMF判断requested NSSAI提供的多个S-NSSAI皆不可用，则执行以下步骤S502-S505。Wherein, if the first registration request message carries the requested NSSAI, the requested NSSAI includes multiple S-NSSAIs, and the AMF determines that none of the multiple S-NSSAIs provided by the requested NSSAI are available, then the following steps S502-S505 are executed.
若第一注册请求消息中未携带requested NSSAI，且AMF确定无该UE可用的默认配置的S-NSSAI，则执行以下步骤S507-S508。If the first registration request message does not carry the requested NSSAI, and the AMF determines that there is no S-NSSAI with the default configuration available for the UE, the following steps S507-S508 are executed.
S502：AMF向UE发送注册拒绝消息。S502: The AMF sends a registration rejection message to the UE.
该注册拒绝消息中，携带配置为“#62"No network slices available"”的原因值、rejected NSSAI IE以及第一指示信息。其中，rejected NSSAI IE用于携带rejected NSSAI，第一指示信息用于指示rejected NSSAI IE中携带的rejected NSSAI需保存。The registration rejection message carries the reason value configured as "#62"No network slices available"", rejected NSSAI IE, and first indication information. Among them, the rejected NSSAI IE is used to carry rejected NSSAI, and the first indication information is used to indicate that the rejected NSSAI carried in the rejected NSSAI IE needs to be stored.
S503：UE存储rejected NSSAI。之后UE继续在第一PLMN尝试注册。S503: The UE stores the rejected NSSAI. After that, the UE continues to try to register in the first PLMN.
当UE执行PLMN选择后，UE才会删除rejected NSSAI。After the UE performs PLMN selection, the UE will delete the rejected NSSAI.
若UE确定可用NSSAI集合中的S-NSSAI均属于被拒绝的NSSAI，则执行S504-S505。若UE确定可用NSSAI集合包括非被拒绝的S-NSSAI，则执行S506。If the UE determines that all S-NSSAIs in the available NSSAI set belong to rejected NSSAIs, S504-S505 are executed. If the UE determines that the available NSSAI set includes non-rejected S-NSSAI, S506 is executed.
S504：UE从第一PLMN选择至第二PLMN，并在PLMN选择后保留第一PLMN的信息。S504: The UE selects from the first PLMN to the second PLMN, and retains the information of the first PLMN after the PLMN is selected.
若UE仅保存了第一PLMN的信息(未将第一PLMN的信息存储至第一PLMN列表)，则UE可在N1模式下对第二PLMN注册成功后，或在UE关闭N1模式后，或者在N1模式下UE从第二PLMN选择至其它PLMN(可称为第三PLMN)后，删除第一PLMN的信息。If the UE only saves the information of the first PLMN (the information of the first PLMN is not stored in the first PLMN list), the UE can successfully register the second PLMN in the N1 mode, or after the UE turns off the N1 mode, or In the N1 mode, after the UE selects from the second PLMN to another PLMN (may be referred to as the third PLMN), the information of the first PLMN is deleted.
若UE保留第一PLMN的信息的方式为将第一PLMN的信息保存到第一PLMN列表，则UE可在N1模式下对某个PLMN注册成功后，或者在UE关闭N1模式后删除第一PLMN列表。If the way for the UE to retain the information of the first PLMN is to save the information of the first PLMN to the first PLMN list, the UE can successfully register a certain PLMN in the N1 mode, or delete the first PLMN after the UE turns off the N1 mode List.
S505：若UE根据第一PLMN的信息确定第二PLMN与第一PLMN相同，则UE关闭N1模式能力，或者，UE向AMF发送第二注册请求消息，第二注册请求消息中不包括NSSAI，或者说，该第二注册请求消息中不携带requested NSSAI，若AMF根据第二注册请求消息，确定无该UE可用的默认配置的S-NSSAI，则可执行S507-S508。S505: If the UE determines that the second PLMN is the same as the first PLMN according to the information of the first PLMN, the UE turns off the N1 mode capability, or the UE sends a second registration request message to the AMF, and the second registration request message does not include NSSAI, or That is, the second registration request message does not carry the requested NSSAI. If the AMF determines that there is no S-NSSAI with the default configuration available for the UE according to the second registration request message, S507-S508 can be executed.
S506：UE向AMF发送的第二注册请求消息中包括非被拒绝的S-NSSAI，以请求注册到非被拒绝的网络切片。若AMF判断第二注册请求消息提供的S-NSSAI皆不可用，则执行步骤S502-S505。S506: The second registration request message sent by the UE to the AMF includes the non-rejected S-NSSAI to request registration to the non-rejected network slice. If the AMF determines that the S-NSSAI provided by the second registration request message is not available, steps S502-S505 are executed.
其中，可用NSSAI集合中的NSSAI，包括allowed NSSAI以及configured NSSAI。非被拒绝的NSSAI，是指UE存储的rejected NSSAI以外的NSSAI。Among them, the available NSSAIs in the NSSAI set include allowed NSSAI and configured NSSAI. The non-rejected NSSAI refers to the NSSAI other than the rejected NSSAI stored by the UE.
S507：AMF向UE发送第三指示信息。S507: The AMF sends third indication information to the UE.
例如，第三指示信息为异常情况指示信息。For example, the third indication information is abnormal situation indication information.
S508：UE根据第三指示信息关闭N1模式能力，执行PLMN选择。S508: The UE turns off the N1 mode capability according to the third indication information, and performs PLMN selection.
采用以上图6所示流程，在尝试根据所有属于allowed NSSAI以及configured NSSAI的S-NSSAI进行注册的基础上，由于UE在执行PLMN选择之前均保存rejected NSSAI，UE能够判断被拒NSSAI。假如UE判断allowed NSSAI以及configured NSSAI中没有可用的S-NSSAI，则UE在请求注册时发送的registration request中不携带requested NSSAI，此后AMF可接受注册并提供new configured NSSAI，或者，AMF可拒绝并向UE指示发生异常情况。当发生异常情况后，UE关闭N1模式能力，切换到S1模式，执行PLMN重选， 删除保存的rejected NSSAI信息。此外，由于执行PLMN重选后，UE仍然存第一PLMN的信息，从而UE可在再次选择至第一PLMN后，关闭N1模式能力，或者在注册请求消息中不携带网络切片的信息，以避免在第一PLMN中重复尝试注册。Using the process shown in Figure 6 above, after attempting to register based on all S-NSSAIs belonging to allowed NSSAI and configured NSSAI, since the UE saves rejected NSSAI before performing PLMN selection, the UE can determine the rejected NSSAI. If the UE determines that there is no S-NSSAI available in allowed NSSAI and configured NSSAI, the registration request sent by the UE when requesting registration does not carry the requested NSSAI. After that, AMF can accept registration and provide new configured NSSAI, or AMF can reject it and send it to The UE indicates that an abnormal situation has occurred. When an abnormal situation occurs, the UE closes the N1 mode capability, switches to the S1 mode, performs PLMN reselection, and deletes the saved rejected NSSAI information. In addition, since the UE still stores the information of the first PLMN after performing PLMN reselection, the UE can turn off the N1 mode capability after selecting the first PLMN again, or do not carry network slice information in the registration request message to avoid Repeated registration attempts in the first PLMN.
在图3基础上，AMF根据第一注册请求发送的注册拒绝消息也可不携带被拒绝的NSSAI，由UE将第一注册请求中携带的S-NSSAI作为被拒绝的NSSAI。如图7所示，本申请实施例提供的一种通信方法可包括以下步骤：On the basis of FIG. 3, the registration rejection message sent by the AMF according to the first registration request may not carry the rejected NSSAI, and the UE uses the S-NSSAI carried in the first registration request as the rejected NSSAI. As shown in FIG. 7, a communication method provided by an embodiment of the present application may include the following steps:
S601：UE向AMF发送第一注册请求消息。S601: The UE sends a first registration request message to the AMF.
其中，若第一注册请求消息中携带了requested NSSAI，requested NSSAI包括多个S-NSSAI，且AMF判断requested NSSAI提供的多个S-NSSAI皆不可用，则执行以下步骤S302-S304。Wherein, if the first registration request message carries the requested NSSAI, the requested NSSAI includes multiple S-NSSAIs, and the AMF determines that none of the multiple S-NSSAIs provided by the requested NSSAI are available, then the following steps S302-S304 are executed.
若第一注册请求消息中未携带requested NSSAI，且AMF确定无该UE可用的默认配置的S-NSSAI，则执行以下步骤S605-S606。If the first registration request message does not carry the requested NSSAI, and the AMF determines that there is no S-NSSAI with the default configuration available for the UE, the following steps S605-S606 are executed.
S602：AMF向UE发送注册拒绝消息。S602: The AMF sends a registration rejection message to the UE.
该注册拒绝消息中，携带配置为“#62"No network slices available"”的原因值以及第一指示信息。其中，第一指示信息用于指示rejected NSSAI需要保存。此外，该注册拒绝消息中可以携带rejected NSSAI IE，rejected NSSAI IE用于携带rejected NSSAI，包括至少一个S-NSSAI，或者，可由UE默认第一注册请求消息中携带的S-NSSAI属于rejected NSSAI。进一步的，requested NSSAI的拒绝原因默认为在所述终端所在的注册区域内不可用、因在第一PLMN内不可用或者网络切片的验证和授权失败或撤销。The registration rejection message carries the reason value configured as "#62"No network slices available"" and the first indication information. Among them, the first indication information is used to indicate that the rejected NSSAI needs to be saved. In addition, the registration rejection message may carry rejected NSSAI IE. The rejected NSSAI IE is used to carry rejected NSSAI, including at least one S-NSSAI, or the UE may default that the S-NSSAI carried in the first registration request message belongs to rejected NSSAI. Further, the reason for rejection of the requested NSSAI is by default that it is unavailable in the registration area where the terminal is located, because it is unavailable in the first PLMN, or the verification and authorization of the network slice fails or is revoked.
S603：UE存储rejected NSSAI。之后UE继续在第一PLMN尝试注册。S603: The UE stores the rejected NSSAI. After that, the UE continues to try to register in the first PLMN.
当UE执行PLMN选择后，UE才会删除rejected NSSAI。After the UE performs PLMN selection, the UE will delete the rejected NSSAI.
S604：UE向AMF发送第二注册请求消息。S604: The UE sends a second registration request message to the AMF.
其中，若UE确定可用NSSAI集合中的S-NSSAI均属于被拒绝的NSSAI，则UE向AMF发送第二注册请求消息，第二注册请求消息中不包括网络切片的信息，或者说，该第二注册请求消息中不携带requested NSSAI，若AMF根据第二注册请求消息，确定无该UE可用的默认配置的S-NSSAI，则可执行步骤S605-S606。若UE确定可用NSSAI集合包括非被拒绝的S-NSSAI，则UE向AMF发送的第二注册请求消息中包括非被拒绝的S-NSSAI，以请求注册到非被拒绝的网络切片。Among them, if the UE determines that all S-NSSAIs in the available NSSAI set belong to rejected NSSAIs, the UE sends a second registration request message to AMF. The second registration request message does not include network slice information, or in other words, the second registration request message. The registration request message does not carry the requested NSSAI. If the AMF determines that there is no S-NSSAI with the default configuration available for the UE according to the second registration request message, steps S605-S606 can be performed. If the UE determines that the available NSSAI set includes the non-rejected S-NSSAI, the second registration request message sent by the UE to the AMF includes the non-rejected S-NSSAI to request registration to the non-rejected network slice.
其中，可用NSSAI集合中的NSSAI，包括allowed NSSAI以及configured NSSAI。非被拒绝的NSSAI，是指UE存储的rejected NSSAI以外的NSSAI。Among them, the available NSSAIs in the NSSAI set include allowed NSSAI and configured NSSAI. The non-rejected NSSAI refers to the NSSAI other than the rejected NSSAI stored by the UE.
S605：AMF向UE发送第三指示信息。S605: The AMF sends third indication information to the UE.
例如，第三指示信息为异常情况指示信息。For example, the third indication information is abnormal situation indication information.
S606：UE根据第三指示信息关闭N1模式能力，以执行PLMN选择。S606: The UE turns off the N1 mode capability according to the third indication information to perform PLMN selection.
采用以上图7所示流程，在尝试根据所有属于allowed NSSAI以及configured NSSAI的S-NSSAI进行注册的基础上，由于UE在执行PLMN选择之前均保存rejected NSSAI，UE能够判断被拒NSSAI。其中，rejected NSSAI由AMF指示，或者，UE在接收到注册及消息后，将此前的注册请求消息中携带的requested NSSAI作为rejected NSSAI。Using the process shown in Figure 7 above, after trying to register based on all S-NSSAIs belonging to allowed NSSAI and configured NSSAI, since the UE saves rejected NSSAI before performing PLMN selection, the UE can determine the rejected NSSAI. Among them, the rejected NSSAI is indicated by the AMF, or, after the UE receives the registration and message, it uses the requested NSSAI carried in the previous registration request message as the rejected NSSAI.
上述本申请提供的实施例中，从UE以及AMF所实现的功能的角度对本申请实施例提供的方法及方法流程进行了介绍。为了实现上述本申请实施例提供的方法中的各功能，UE以及AMF可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加 软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。In the above-mentioned embodiments provided in the present application, the method and method flow provided in the embodiments of the present application are introduced from the perspective of the functions implemented by the UE and the AMF. In order to realize the functions in the methods provided in the above embodiments of the present application, the UE and the AMF may include a hardware structure and/or a software module, and the above functions are implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether a certain function among the above-mentioned functions is executed by a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
如图8所示，本申请实施例提供的一种通信装置可以包括通信模块801以及处理模块802，以上通信模块801以及处理模块802之间相互耦合。该通信装置800可用于执行以上图2-图7中所示的由UE或AMF执行的步骤。该通信模块801可用于支持通信装置800进行通信，通信模块801也可被称为通信单元、通信接口、收发模块或收发单元。通信模块801可具备无线通信功能，例如能够通过无线通信方式与其他通信装置进行通信。处理模块802也可被称为处理单元，可用于支持该通信装置800执行上述方法实施例中会话管理网元的处理动作，包括但不限于：生成由通信模块801发送的信息、消息，和/或，对通信模块801接收的信号进行解调解码等等。As shown in FIG. 8, a communication device provided by an embodiment of the present application may include a communication module 801 and a processing module 802, and the communication module 801 and the processing module 802 are coupled with each other. The communication device 800 can be used to perform the steps performed by the UE or the AMF shown in FIGS. 2-7 above. The communication module 801 can be used to support the communication device 800 to communicate. The communication module 801 can also be called a communication unit, a communication interface, a transceiver module or a transceiver unit. The communication module 801 may have a wireless communication function, such as being able to communicate with other communication devices through wireless communication. The processing module 802 can also be referred to as a processing unit, and can be used to support the communication device 800 to perform the processing actions of the session management network element in the above method embodiment, including but not limited to: generating information and messages sent by the communication module 801, and/ Or, demodulate and decode the signal received by the communication module 801 and so on.
例如，在执行上述方法实施例中由UE执行的步骤时，通信模块801可用于接收来自于网络设备的至少一个被拒绝的网络切片的信息和第一指示信息，该网络设备部署于第一PLMN。处理模块802可用于根据该第一指示信息，在通信装置800对该第一PLMN进入去注册态之后，保留与该第一PLMN相关联的被拒绝的网络切片的信息。For example, when performing the steps performed by the UE in the foregoing method embodiment, the communication module 801 may be used to receive at least one rejected network slice information and first indication information from a network device that is deployed in the first PLMN. . The processing module 802 may be configured to retain the information of the rejected network slice associated with the first PLMN after the communication device 800 enters the de-registered state for the first PLMN according to the first indication information.
示例性的，通信模块801可接收来自于网络设备的第一注册拒绝消息，该第一注册拒绝消息用于指示该第一注册请求消息被拒绝，该第一注册拒绝消息可承载该至少一个被拒绝的网络切片的信息以及该第一指示信息。Exemplarily, the communication module 801 may receive a first registration rejection message from a network device, the first registration rejection message is used to indicate that the first registration request message is rejected, and the first registration rejection message may carry the at least one registered rejection message. The information of the rejected network slice and the first indication information.
或者，通信模块801可接收来自于该网络设备的第一去注册请求消息，该第一去注册请求消息用于指示通信装置800在该第一PLMN执行去注册。该第一去注册请求消息可承载该至少一个被拒绝的网络切片的信息以及该第一指示信息。其中，第一指示信息可以是第一去注册请求消息中的重新注册指示信息。Alternatively, the communication module 801 may receive a first de-registration request message from the network device, where the first de-registration request message is used to instruct the communication device 800 to perform de-registration in the first PLMN. The first deregistration request message may carry the information of the at least one rejected network slice and the first indication information. The first indication information may be the re-registration indication information in the first de-registration request message.
在一种可能的设计中，以上被拒绝的网络切片，可包括因在该第一PLMN内不可用而被拒绝的网络切片、因在该通信装置800所在的注册区域内不可用而被拒绝的网络切片或者因网络切片的验证和授权失败或撤销而被拒绝的网络切片中的至少一个网络切片。In a possible design, the above rejected network slices may include network slices rejected because they are not available in the first PLMN, and rejected because they are not available in the registration area where the communication device 800 is located. A network slice or at least one network slice in a network slice that is rejected due to a failure or revocation of verification and authorization of the network slice.
在一种可能的设计中，处理模块802可通信装置800在对第一PLMN进入去注册态后，保留因在该第一PLMN内不可用而被拒绝的网络切片的信息。In a possible design, the processing module 802 may retain the information of the network slices that are rejected due to being unavailable in the first PLMN after the communication device 800 enters the de-registered state for the first PLMN.
在一种可能的设计中，处理模块802可在通信装置800对第一PLMN进入去注册态，且确定通信装置800驻留的注册区域或跟踪区域未发生变化后，保留因在该通信装置800所在的注册区域内不可用而被拒绝的网络切片的信息。In a possible design, the processing module 802 may be in the unregistered state of the first PLMN by the communication device 800, and after it is determined that the registration area or the tracking area where the communication device 800 resides has not changed, the processing module 802 may retain the information on the communication device 800. Information about network slices that are not available and rejected in the registration area where they are located.
在一种可能的设计中，处理模块802确定可用网络切片信息集合中的网络切片的信息均为被拒绝的网络切片的信息，则通信模块801可向网络设备发送第二注册请求消息，该第二注册请求消息中不包括网络切片的信息，或者说，该第二注册请求消息中不携带requested NSSAI。其中，可用网络切片信息集合包括第一PLMN准许的网络切片的信息、第一PLMN配置的网络切片的信息以及默认配置的网络切片的信息。例如，可用网络切片信息集合可包括allowed NSSAI、configured NSSAI以及default configured NSSAI。allowed NSSAI以及configured NSSAI可由该网络设备指示。In a possible design, the processing module 802 determines that the network slice information in the available network slice information set is the information of the rejected network slice, and the communication module 801 may send a second registration request message to the network device. 2. The registration request message does not include network slice information, in other words, the second registration request message does not carry requested NSSAI. Wherein, the available network slice information set includes information of network slices permitted by the first PLMN, information of network slices configured by the first PLMN, and information of network slices configured by default. For example, the available network slice information set may include allowed NSSAI, configured NSSAI, and default configured NSSAI. Allowed NSSAI and configured NSSAI can be indicated by the network device.
在一种可能的设计中，处理模块802可确定可用网络切片信息集合中的网络切片的信息均包含在与第一PLMN相关联的被拒绝的网络切片的信息中。In a possible design, the processing module 802 may determine that the information of the network slice in the available network slice information set is all included in the information of the rejected network slice associated with the first PLMN.
在一种可能的设计中，通信模块801可接收来自于网络设备的第二指示信息，该第二指示信息可用于指示通信装置800关闭N1模式能力，则处理模块802可根据第二指示信 息关闭N1模式能力。In a possible design, the communication module 801 may receive second indication information from the network device, and the second indication information may be used to instruct the communication device 800 to turn off the N1 mode capability, and the processing module 802 may turn off according to the second indication information. N1 mode capability.
在一种可能的设计中，通信模块801可接收来自于网络设备的第三指示信息，该第三指示信息用于指示无可用的默认网络切片，则处理模块802可根据第三指示信息关闭N1模式能力，并从第一PLMN选择至第二PLMN。其中，处理模块802可在通信模块801第一次接收到第三指示信息后，关闭N1模式能力，并从第一PLMN选择至第二PLMN，或者，处理模块802在确定通信模块801接收到第三指示信息的次数达到阈值(如5次)后，关闭N1模式能力，并从第一PLMN选择至第二PLMN。In a possible design, the communication module 801 may receive the third indication information from the network device, and the third indication information is used to indicate that no default network slice is available, and the processing module 802 may close N1 according to the third indication information. Mode capability, and select from the first PLMN to the second PLMN. The processing module 802 may turn off the N1 mode capability after the communication module 801 receives the third indication information for the first time, and select the first PLMN to the second PLMN, or the processing module 802 may determine that the communication module 801 receives the first PLMN. After the number of three indication messages reaches the threshold (for example, 5 times), the N1 mode capability is turned off, and the first PLMN is selected to the second PLMN.
在一种可能的设计中，UE可接收来自于网络设备的第四指示信息，该第四指示信息用于指示通信装置800执行PLMN选择。则处理模块802可根据第四指示信息，从第一PLMN选择至第二PLMN。In a possible design, the UE may receive fourth indication information from the network device, where the fourth indication information is used to instruct the communication device 800 to perform PLMN selection. Then the processing module 802 can select from the first PLMN to the second PLMN according to the fourth indication information.
在一种可能的设计中，处理模块802可根据第一PLMN的信息确定该第二PLMN，第一PLMN与第二PLMN不同。以避免重复在第一PLMN请求注册。In a possible design, the processing module 802 may determine the second PLMN according to the information of the first PLMN, and the first PLMN is different from the second PLMN. To avoid repeating the registration request in the first PLMN.
在一种可能的设计中，处理模块802在从第一PLMN选择至第二PLMN后，保留第一PLMN的信息。In a possible design, the processing module 802 retains the information of the first PLMN after selecting from the first PLMN to the second PLMN.
在一种可能的设计中，处理模块802可将第一PLMN的信息存储至第一PLMN列表中。该第一PLMN列表包括没有可用网络切片的PLMN。或者说，第一PLMN列表中的PLMN没有可用网络切片。In a possible design, the processing module 802 may store the information of the first PLMN in the first PLMN list. The first PLMN list includes PLMNs with no available network slices. In other words, there are no available network slices for the PLMN in the first PLMN list.
在一种可能的设计中，处理模块802可根据第一PLMN列表确定该第二PLMN，其中，第二PLMN不包括在第一PLMN列表中。In a possible design, the processing module 802 may determine the second PLMN according to the first PLMN list, where the second PLMN is not included in the first PLMN list.
在一种可能的设计中，处理模块802根据第一PLMN的信息确定第一PLMN与第二PLMN相同，则处理模块802关闭N1模式能力。In a possible design, the processing module 802 determines that the first PLMN is the same as the second PLMN according to the information of the first PLMN, and the processing module 802 turns off the N1 mode capability.
在一种可能的设计中，处理模块802根据第一PLMN的信息确定第二PLMN为第一PLMN列表中的PLMN，或者说，处理模块802根据第一PLMN的信息确定该第一PLMN列表包括该第二PLMN，则处理模块802关闭N1模式能力。In a possible design, the processing module 802 determines that the second PLMN is the PLMN in the first PLMN list according to the information of the first PLMN, or in other words, the processing module 802 determines that the first PLMN list includes the first PLMN according to the information of the first PLMN. For the second PLMN, the processing module 802 turns off the N1 mode capability.
在一种可能的设计中，若处理模块802确定在N1模式能力开启时搜索到的待选PLMN均属于第一PLMN列表，则处理模块802关闭N1模式能力。In a possible design, if the processing module 802 determines that the candidate PLMNs searched when the N1 mode capability is turned on belong to the first PLMN list, the processing module 802 turns off the N1 mode capability.
在一种可能的设计中，通信模块801可接收来自于网络设备的第五指示信息，该第五指示信息可用于指示至少一个引导网络切片的信息。通信模块801可根据该引导网络切片的信息，向网络设备发送第三注册请求消息，该第三注册请求消息中包括至少一个引导网络切片的信息。In a possible design, the communication module 801 may receive fifth indication information from the network device, and the fifth indication information may be used to indicate at least one piece of information for guiding the network slice. The communication module 801 may send a third registration request message to the network device according to the information of the guiding network slicing, where the third registration request message includes at least one guiding network slicing information.
在一种可能的设计中，通信模块801可接收来自于网络设备的第六指示信息，该第六指示信息用于指示UE不需要重新注册，或用于指示UE不需要对第一PLMN重新注册。则处理模块802可删除与第一PLMN相关联的被拒绝的网络切片的信息。第六指示信息可包括在第二去注册请求消息中，该第二去注册请求消息用于指示UE在第一PLMN执行去注册，第六指示信息具体可以是不重新注册指示信息。In a possible design, the communication module 801 may receive sixth indication information from the network device, the sixth indication information is used to indicate that the UE does not need to re-register, or to indicate that the UE does not need to re-register to the first PLMN . Then the processing module 802 may delete the information of the rejected network slice associated with the first PLMN. The sixth indication information may be included in the second de-registration request message, which is used to instruct the UE to perform de-registration in the first PLMN, and the sixth indication information may specifically be non-re-registration indication information.
应理解，以上网络设备可包括AMF。It should be understood that the above network equipment may include AMF.
在执行上述方法实施例中由AMF执行的步骤时，通信模块801可向UE发送至少一个被拒绝的网络切片的信息和第一指示信息。其中，AMF部署于第一PLMN。该第一指示信息可用于指示UE在该第一PLMN进入去注册态后，保留与该第一PLMN相关联的被拒绝的网络切片的信息。When performing the steps performed by the AMF in the foregoing method embodiment, the communication module 801 may send the information of at least one rejected network slice and the first indication information to the UE. Among them, AMF is deployed in the first PLMN. The first indication information may be used to instruct the UE to retain the rejected network slice information associated with the first PLMN after the first PLMN enters the de-registration state.
在一种可能的设计中，通信模块801可向UE发送第一注册拒绝消息或第一去注册请求消息，第一注册拒绝消息或第一去注册请求消息中包括至少一个被拒绝的网络切片的信息和第一指示信息。其中，第一注册拒绝消息用于指示该第一注册请求消息被拒绝，第一去注册请求消息用于指示UE在该第一PLMN执行去注册。例如，第一指示信息可以是第一去注册请求消息中的重新注册指示信息。该重新注册指示信息可用于指示UE在该第一PLMN执行去注册后，需要对第一PLMN重新请求注册。In a possible design, the communication module 801 may send a first registration rejection message or a first de-registration request message to the UE, and the first registration rejection message or the first de-registration request message includes at least one rejected network slice. Information and first instruction information. The first registration rejection message is used to indicate that the first registration request message is rejected, and the first de-registration request message is used to instruct the UE to perform de-registration in the first PLMN. For example, the first indication information may be the re-registration indication information in the first de-registration request message. The re-registration indication information may be used to indicate that the UE needs to re-register the first PLMN after performing de-registration in the first PLMN.
在一种可能的设计中，第一指示信息具体用于指示，UE在第一PLMN进入去注册态后，保留因在第一PLMN内不可用而被拒绝的网络切片的信息。In a possible design, the first indication information is specifically used to indicate that after the UE enters the de-registered state in the first PLMN, it retains information about the network slices that are rejected due to being unavailable in the first PLMN.
在一种可能的设计中，第一指示信息可具体指示UE在第一PLMN处于去注册态且UE驻留的注册区域或跟踪区域不变后，保留因在UE所在的注册区域内不可用而被拒绝的网络切片的信息。In a possible design, the first indication information may specifically indicate that the UE is in the de-registered state in the first PLMN and the registration area or tracking area where the UE resides remains unchanged. Information about rejected network slices.
在一种可能的设计中，通信模块801可接收来自一UE的第二注册请求消息，该第二注册请求消息不包括网络切片的信息，或者说，该第二注册请求消息中不携带requested NSSAI。通信模块801可向UE发送第二指示信息，该第二指示信息用于指示UE关闭N1模式能力；或者，通信模块801向UE发送第三指示信息，该第三指示信息用于指示无可用的默认网络切片，以及用于指示UE在所述第一PLMN执行PLMN选择后存储该第一PLMN的信息；或者，通信模块801向UE发送第四指示信息，该第四指示信息用于指示UE执行PLMN选择，以及用于指示UE在所述第一PLMN执行PLMN选择后存储该第一PLMN的信息。In a possible design, the communication module 801 may receive a second registration request message from a UE, the second registration request message does not include network slice information, or in other words, the second registration request message does not carry requested NSSAI . The communication module 801 may send second indication information to the UE, the second indication information is used to instruct the UE to turn off the N1 mode capability; or, the communication module 801 may send third indication information to the UE, and the third indication information is used to indicate that there is no available The default network slice, and is used to instruct the UE to store the information of the first PLMN after the first PLMN performs PLMN selection; or, the communication module 801 sends fourth indication information to the UE, and the fourth indication information is used to instruct the UE to perform PLMN selection, and used to instruct the UE to store the information of the first PLMN after the first PLMN performs PLMN selection.
在一种可能的设计中，通信模块801可向UE发送第五指示信息，第五指示信息用于指示至少一个引导网络切片。通信模块801还可接收来自于UE的第三注册请求消息，该第三注册请求消息用于请求接入至少一个引导网络切片。其中，第三注册请求消息可包括至少一个引导网络切片的信息。In a possible design, the communication module 801 may send fifth indication information to the UE, where the fifth indication information is used to indicate at least one boot network slice. The communication module 801 may also receive a third registration request message from the UE, where the third registration request message is used to request access to at least one boot network slice. Wherein, the third registration request message may include at least one piece of information for guiding the network slice.
在一种可能的设计中，通信模块801可向UE发送第六指示信息，该第六指示信息用于指示UE不需要重新注册，或用于指示UE不需要对第一PLMN重新注册。该第六指示信息还可用于指示UE删除与第一PLMN相关联的被拒绝的网络切片的信息。第六指示信息可包括在第二去注册请求消息中，该第二去注册请求消息用于指示UE在第一PLMN执行去注册，第六指示信息具体可以是不重新注册指示信息。In a possible design, the communication module 801 may send sixth indication information to the UE, where the sixth indication information is used to indicate that the UE does not need to re-register, or to indicate that the UE does not need to re-register with the first PLMN. The sixth indication information may also be used to instruct the UE to delete the rejected network slice information associated with the first PLMN. The sixth indication information may be included in the second de-registration request message, which is used to instruct the UE to perform de-registration in the first PLMN, and the sixth indication information may specifically be non-re-registration indication information.
在另一种可能的实现方式中，本申请实施例提供的通信装置还可由硬件组件构成，这些硬件组件例如处理器、存储器或者收发器等，以实现本申请中UPF、第一UE或SMF的功能。In another possible implementation manner, the communication device provided in the embodiment of the present application may also be composed of hardware components, such as a processor, a memory, or a transceiver, etc., to implement the UPF, the first UE, or the SMF in the present application. Function.
为便于理解，图9中仅示出了通信装置900执行本申请所示方法所需的结构，本申请并不限制通信装置可具备更多组件。该通信装置900可用于执行上述方法实施例中AMF执行的步骤。该通信装置900可包括通信接口901、存储器902以及处理器903。该通信接口901可以用于通信装置进行通信，如用于发送或接收信号。该存储器902与所述处理器903耦合，可用于保存通信装置900实现各功能所必要的程序和数据。该处理器903被配置为支持通信装置900执行上述方法中由AMF执行的处理功能，如确定生成由通信接口901发送的信息、消息，和/或，对通信接口901接收的信号进行解调解码等等。以上存储器902以及处理器903可集成于一体也可相互独立。For ease of understanding, FIG. 9 only shows the structure required by the communication device 900 to perform the method shown in the present application, and the present application does not limit the communication device to be provided with more components. The communication device 900 can be used to perform the steps performed by the AMF in the foregoing method embodiments. The communication device 900 may include a communication interface 901, a memory 902, and a processor 903. The communication interface 901 can be used for communication with a communication device, for example, for sending or receiving signals. The memory 902 is coupled with the processor 903 and can be used to store programs and data necessary for the communication device 900 to implement various functions. The processor 903 is configured to support the communication device 900 to perform the processing functions performed by the AMF in the foregoing method, such as determining to generate information and messages sent by the communication interface 901, and/or to demodulate and decode the signals received by the communication interface 901 and many more. The above memory 902 and the processor 903 may be integrated or independent of each other.
示例性的，该通信接口901可以是通信端口，如网元之间用于通信的通信端口(或称 接口)。通信接口901也可被称为收发单元或通信单元。该处理器903可通过处理芯片或处理电路实现。Exemplarily, the communication interface 901 may be a communication port, such as a communication port (or interface) used for communication between network elements. The communication interface 901 may also be referred to as a transceiving unit or a communication unit. The processor 903 can be implemented by a processing chip or a processing circuit.
例如，在执行上述方法实施例中AMF执行的步骤时，以上通信接口901可用于执行通信模块801执行的步骤。处理器903可用于执行上述由处理模块802执行的步骤，这里不再赘述。For example, when performing the steps performed by the AMF in the foregoing method embodiment, the above communication interface 901 may be used to perform the steps performed by the communication module 801. The processor 903 may be configured to execute the above steps executed by the processing module 802, and details are not described herein again.
图10中，以手机为例说明通信装置1000可能的结构。如图10所示，该通信装置1000可包括处理器1001、存储器1002以及收发器1003。该通信装置1000可用于执行以上方法实施例中由UE执行的步骤。In FIG. 10, a possible structure of the communication device 1000 is illustrated by taking a mobile phone as an example. As shown in FIG. 10, the communication device 1000 may include a processor 1001, a memory 1002, and a transceiver 1003. The communication device 1000 can be used to perform the steps performed by the UE in the above method embodiments.
以上处理器1001可用于对通信协议以及通信数据进行处理，以及对第一通信装置进行控制，执行软件程序，处理软件程序的数据等。存储器1002可用于存储程序和数据，处理器1001可基于该程序执行本申请实施例中由第一通信装置执行的方法。The above processor 1001 can be used to process the communication protocol and communication data, and to control the first communication device, execute the software program, process the data of the software program, and so on. The memory 1002 may be used to store programs and data, and the processor 1001 may execute the method executed by the first communication device in the embodiment of the present application based on the program.
收发器1003可包括射频单元以及天线。其中，射频单元可用于基带信号与射频信号的转换以及对射频信号的处理。天线可用于收发电磁波形式的射频信号。另外，也可仅将射频单元视为收发器1003，则此时通信装置1000可包括处理器1001、存储器1002、收发器1003以及天线。The transceiver 1003 may include a radio frequency unit and an antenna. Among them, the radio frequency unit can be used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals. The antenna can be used to send and receive radio frequency signals in the form of electromagnetic waves. In addition, the radio frequency unit can also be regarded as the transceiver 1003 only. In this case, the communication device 1000 can include a processor 1001, a memory 1002, a transceiver 1003, and an antenna.
另外，该通信装置1000还可包括输入输出装置，如触摸屏、显示屏或者键盘等可用于接收用户输入的数据以及对用户输出数据的组件。需要说明的是，有些种类的通信装置可以不具有输入输出装置。In addition, the communication device 1000 may also include an input and output device, such as a touch screen, a display screen, or a keyboard, etc., which can be used to receive data input by the user and output data to the user. It should be noted that some types of communication devices may not have input and output devices.
基于图10所示结构，当通信装置1000需要发送数据时，处理器1001可对待发送的数据进行基带处理后，输出基带信号至射频单元，射频单元将基带信号进行射频处理后将射频信号通过天线以电磁波的形式进行发送。当有数据发送到通信装置1000时，射频单元通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器1001，处理器1001将基带信号转换为数据并对该数据进行处理。Based on the structure shown in FIG. 10, when the communication device 1000 needs to send data, the processor 1001 can baseband processing the data to be sent and output the baseband signal to the radio frequency unit, and the radio frequency unit performs radio frequency processing on the baseband signal and passes the radio frequency signal through the antenna Send in the form of electromagnetic waves. When data is sent to the communication device 1000, the radio frequency unit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1001, and the processor 1001 converts the baseband signal into data and applies the data to the baseband signal. To process.
示例性的，处理器1001可用于执行由图8所示处理模块802执行的步骤。收发器1003可用于执行由图8所示通信模块801执行的步骤。Exemplarily, the processor 1001 may be configured to execute the steps executed by the processing module 802 shown in FIG. 8. The transceiver 1003 can be used to perform the steps performed by the communication module 801 shown in FIG. 8.
另外，根据实际使用的需要，本申请实施例提供的通信装置可包括处理器，由该处理器调用外接的收发器和/或存储器以实现上述功能或步骤或操作。通信装置也可包括存储器，由处理器调用并执行存储器中存储的程序实现上述功能或步骤或操作。或者，通信装置也可包括处理器及收发器(或通信接口)，由处理器调用并执行外接的存储器中存储的程序实现上述功能或步骤或操作。或者，通信装置也可包括处理器、存储器以及收发器。In addition, according to actual needs, the communication device provided in the embodiments of the present application may include a processor, and the processor may call an external transceiver and/or memory to implement the above-mentioned functions or steps or operations. The communication device may also include a memory, and the processor can call and execute a program stored in the memory to implement the above-mentioned functions or steps or operations. Alternatively, the communication device may also include a processor and a transceiver (or a communication interface), and the processor calls and executes a program stored in an external memory to implement the above-mentioned functions or steps or operations. Alternatively, the communication device may also include a processor, a memory, and a transceiver.
基于与上述方法实施例相同构思，本申请实施例中还提供一种计算机可读存储介质，其上存储有程序指令(或称计算机程序、指令)，该程序指令被处理器执行时，使该计算机执行上述方法实施例、方法实施例的任意一种可能的实现方式中由UE或AMF执行的操作。Based on the same idea as the above method embodiment, the embodiment of the present application also provides a computer-readable storage medium on which program instructions (or computer programs, instructions) are stored. When the program instructions are executed by the processor, the The computer executes the operation performed by the UE or the AMF in the foregoing method embodiment and any one of the possible implementation manners of the method embodiment.
基于与上述方法实施例相同构思，本申请实施例中还提供一种通信方法，该通信方法可由UE以及AMF执行。例如，该方法可包括图2-图7中任一附图所示的方法。Based on the same concept as the foregoing method embodiment, an embodiment of the present application also provides a communication method, which can be executed by the UE and the AMF. For example, the method may include the method shown in any one of FIGS. 2-7.
基于与上述方法实施例相同构思，本申请还提供一种计算机程序产品，包括程序指令，该计算机程序产品在被计算机调用执行时，可以使得计算机实现上述方法实施例、方法实施例的任意一种可能的实现方式中由UE或AMF执行的操作。Based on the same concept as the above method embodiment, this application also provides a computer program product, including program instructions, which when called by a computer for execution, can make the computer implement any of the above method embodiments and method embodiments The operation performed by the UE or AMF in a possible implementation.
基于与上述方法实施例相同构思，本申请还提供一种芯片或芯片***，该芯片与收发 器耦合，用于实现上述方法实施例、方法实施例的任意一种可能的实现方式中由UE或AMF执行的操作。该芯片***可包括该芯片，以及包括存储器、通信接口等组件。Based on the same concept as the above method embodiment, this application also provides a chip or chip system, which is coupled with a transceiver, and is used to implement the above method embodiment and any one of the possible implementation manners of the method embodiment. Operations performed by AMF. The chip system may include the chip and components such as memory and communication interface.
基于与上述方法实施例相同构思，本申请还提供一种通信***，该通信***可用于实现上述方法实施例、方法实施例的任意一种可能的实现方式中由UE或AMF执行的操作。示例性的，该通信***具有如图1所示的架构。Based on the same concept as the foregoing method embodiment, the present application also provides a communication system that can be used to implement the foregoing method embodiment and operations performed by the UE or AMF in any possible implementation manner of the method embodiment. Exemplarily, the communication system has an architecture as shown in FIG. 1.
本领域内的技术人员应明白，本申请的实施例可提供为方法、***、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
本申请是参照根据本申请的方法、设备(***)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are used to generate It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的保护范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。Obviously, those skilled in the art can make various changes and modifications to this application without departing from the protection scope of this application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, then this application is also intended to include these modifications and variations.

Claims (37)

  1. 一种通信方法，其特征在于，包括：A communication method, characterized in that it comprises:
    终端接收来自于网络设备的至少一个被拒绝的网络切片的信息和第一指示信息，所述网络设备部署于第一PLMN；The terminal receives at least one rejected network slice information and first indication information from a network device that is deployed in the first PLMN;
    所述终端根据所述第一指示信息，在所述第一PLMN进入去注册态后，保留与所述第一PLMN相关联的被拒绝的网络切片的信息。According to the first indication information, the terminal retains the information of the rejected network slice associated with the first PLMN after the first PLMN enters the de-registered state.
  2. 如权利要求1所述的方法，其特征在于，所述终端接收来自于网络设备的至少一个被拒绝的网络切片的信息和第一指示信息，包括：The method according to claim 1, wherein the terminal receiving at least one rejected network slice information and first indication information from a network device comprises:
    所述终端接收来自于所述网络设备的第一注册拒绝消息，所述第一注册拒绝消息用于指示所述第一注册请求被拒绝，所述第一注册拒绝消息包括所述至少一个被拒绝的网络切片的信息以及所述第一指示信息；或者，The terminal receives a first registration rejection message from the network device, the first registration rejection message is used to indicate that the first registration request is rejected, and the first registration rejection message includes the at least one rejected Information about the network slicing of and the first indication information; or,
    所述终端接收来自于所述网络设备的第一去注册请求消息，所述第一去注册请求消息用于指示所述终端在所述第一PLMN执行去注册，所述第一去注册请求消息包括所述至少一个被拒绝的网络切片的信息以及所述第一指示信息。The terminal receives a first de-registration request message from the network device, the first de-registration request message is used to instruct the terminal to perform de-registration in the first PLMN, the first de-registration request message Including the information of the at least one rejected network slice and the first indication information.
  3. 如权利要求2所述的方法，其特征在于，若所述第一去注册请求消息包括所述至少一个被拒绝的网络切片的信息以及所述第一指示信息，则所述第一指示信息为重新注册指示信息。The method of claim 2, wherein if the first deregistration request message includes the information of the at least one rejected network slice and the first indication information, the first indication information is Re-registration instructions.
  4. 如权利要求1-3中任一所述的方法，其特征在于，所述至少一个被拒绝的网络切片包括：因在所述第一PLMN内不可用而被拒绝的网络切片；因在所述终端所在的注册区域内不可用而被拒绝的网络切片；或者，因网络切片的验证和授权失败或撤销而被拒绝的网络切片。The method according to any one of claims 1-3, wherein the at least one rejected network slice comprises: a network slice rejected because it is not available in the first PLMN; Network slices that are rejected because they are unavailable in the registration area where the terminal is located; or, network slices that are rejected because of failure or revocation of verification and authorization of the network slice.
  5. 如权利要求1-4中任一所述的方法，其特征在于，所述终端根据所述第一指示信息，在所述第一PLMN进入去注册态后，保留与所述第一PLMN相关联的被拒绝的网络切片的信息，包括：The method according to any one of claims 1-4, wherein the terminal retains the association with the first PLMN after the first PLMN enters the de-registered state according to the first indication information Information about rejected network slices, including:
    所述终端在所述第一PLMN进入去注册态后，保留因在所述第一PLMN内不可用而被拒绝的网络切片的信息。After the terminal enters the de-registered state in the first PLMN, the terminal retains the information of the network slices that are rejected because they are not available in the first PLMN.
  6. 如权利要求1-4中任一所述的方法，其特征在于，所述终端根据所述第一指示信息，在所述第一PLMN进入去注册态后，保留与所述第一PLMN相关联的被拒绝的网络切片的信息，包括：The method according to any one of claims 1-4, wherein the terminal retains the association with the first PLMN after the first PLMN enters the de-registered state according to the first indication information Information about rejected network slices, including:
    所述终端在所述第一PLMN处于去注册态且所述终端驻留的注册区域或跟踪区域不变后，保留因在所述终端所在的注册区域内不可用而被拒绝的网络切片的信息。After the terminal is in the deregistered state of the first PLMN and the registration area or tracking area where the terminal resides remains unchanged, the terminal retains information about the network slices that are rejected because they are not available in the registration area where the terminal is located .
  7. 如权利要求1-6中任一所述的方法，其特征在于，所述方法还包括：The method according to any one of claims 1-6, wherein the method further comprises:
    所述终端确定可用网络切片信息集合中的网络切片的信息均为被拒绝的网络切片的信息，所述可用网络切片信息集合包括所述第一PLMN准许的网络切片的信息、所述第一PLMN配置的网络切片的信息以及默认配置的网络切片的信息；The terminal determines that the information of the network slice in the available network slice information set is all the information of the rejected network slice, and the available network slice information set includes the information of the network slice approved by the first PLMN, and the first PLMN Information of configured network slices and information of default configured network slices;
    所述终端向所述网络设备发送第二注册请求消息，所述第二注册请求消息不包括网络切片的信息。The terminal sends a second registration request message to the network device, where the second registration request message does not include network slice information.
  8. 如权利要求7所述的方法，其特征在于，所述终端确定网络切片集合中的网络切片均为被拒绝的网络切片，包括：The method according to claim 7, wherein the determining by the terminal that the network slices in the network slice set are all rejected network slices comprises:
    所述终端确定所述与所述第一PLMN相关联的被拒绝的网络切片的信息包括所述可用网络切片信息集合中的每一个网络切片的信息。The terminal determines that the information of the rejected network slice associated with the first PLMN includes information of each network slice in the set of available network slice information.
  9. 如权利要求7或8所述的方法，其特征在于，所述方法还包括：The method according to claim 7 or 8, wherein the method further comprises:
    所述终端接收来自于所述网络设备的第二指示信息，所述第二指示信息用于指示所述终端关闭N1模式能力；Receiving, by the terminal, second indication information from the network device, where the second indication information is used to instruct the terminal to turn off the N1 mode capability;
    所述终端根据所述第二指示信息关闭N1模式能力。The terminal turns off the N1 mode capability according to the second instruction information.
  10. 如权利要求7或8所述的方法，其特征在于，所述方法还包括：The method according to claim 7 or 8, wherein the method further comprises:
    所述终端接收到来自于所述网络设备的第三指示信息，所述第三指示信息用于指示无可用的默认网络切片；The terminal receives third indication information from the network device, where the third indication information is used to indicate that no default network slice is available;
    所述终端根据所述第三指示信息关闭N1模式能力，并从所述第一PLMN选择至第二PLMN。The terminal turns off the N1 mode capability according to the third instruction information, and selects from the first PLMN to the second PLMN.
  11. 如权利要求10所述的方法，其特征在于，还包括：The method of claim 10, further comprising:
    所述终端确定接收到所述第三指示信息的次数达到阈值。The terminal determines that the number of times of receiving the third indication information reaches a threshold.
  12. 如权利要求7或8所述的方法，其特征在于，所述方法还包括：The method according to claim 7 or 8, wherein the method further comprises:
    所述终端接收到来自于所述网络设备的第四指示信息，所述第四指示信息用于指示所述终端执行PLMN选择；The terminal receives fourth indication information from the network device, where the fourth indication information is used to instruct the terminal to perform PLMN selection;
    所述终端根据所述第四指示信息从所述第一PLMN选择至第二PLMN。The terminal selects from the first PLMN to the second PLMN according to the fourth indication information.
  13. 一种通信方法，其特征在于，包括：A communication method, characterized in that it comprises:
    终端向网络设备发送第二注册请求消息，所述第二注册请求不包括网络切片的信息，所述网络设备部署于第一PLMN；The terminal sends a second registration request message to the network device, the second registration request does not include network slice information, and the network device is deployed in the first PLMN;
    所述终端接收来自于所述网络设备的第四指示信息；Receiving, by the terminal, fourth indication information from the network device;
    所述终端根据所述第四指示信息，从所述第一PLMN选择至第二PLMN。The terminal selects from the first PLMN to the second PLMN according to the fourth indication information.
  14. 如权利要求10-13中任一所述的方法，其特征在于，所述方法还包括：The method according to any one of claims 10-13, wherein the method further comprises:
    所述终端在从所述第一PLMN选择至所述第二PLMN后，保留所述第一PLMN的信息。After selecting from the first PLMN to the second PLMN, the terminal retains the information of the first PLMN.
  15. 如权利要求14所述的方法，其特征在于，所述终端保留所述第一PLMN的信息，包括：The method according to claim 14, wherein the retaining information of the first PLMN by the terminal comprises:
    所述终端存储所述第一PLMN的信息至第一PLMN列表，其中，所述PLMN列表包括没有可用网络切片的PLMN。The terminal stores the information of the first PLMN in a first PLMN list, where the PLMN list includes PLMNs with no available network slices.
  16. 如权利要求15所述的方法，其特征在于，所述终端根据所述第四指示信息，从所述第一PLMN选择至第二PLMN，包括：The method according to claim 15, wherein the terminal selecting from the first PLMN to the second PLMN according to the fourth indication information comprises:
    所述终端根据所述第一PLMN列表确定所述第二PLMN，所述第一PLMN列表不包括所述第二PLMN。The terminal determines the second PLMN according to the first PLMN list, and the first PLMN list does not include the second PLMN.
  17. 如权利要求12至15中任一项所述的方法，其特征在于，还包括：The method according to any one of claims 12 to 15, further comprising:
    若所述终端确定所述第一PLMN与所述第二PLMN相同，则关闭N1模式能力。If the terminal determines that the first PLMN is the same as the second PLMN, the N1 mode capability is turned off.
  18. 如权利要求15所述的方法，其特征在于，还包括：The method of claim 15, further comprising:
    若所述终端确定所述第一PLMN列表包括所述第二PLMN，则关闭N1模式能力；或者If the terminal determines that the first PLMN list includes the second PLMN, turn off the N1 mode capability; or
    若所述终端确定在N1模式能力开启时搜索到的待选PLMN均属于所述第一PLMN列表，则关闭N1模式能力。If the terminal determines that the candidate PLMNs searched when the N1 mode capability is turned on belong to the first PLMN list, the N1 mode capability is turned off.
  19. 如权利要求1-18中任一所述的方法，其特征在于，所述方法还包括：The method according to any one of claims 1-18, wherein the method further comprises:
    所述终端接收来自于所述网络设备的第六指示信息，所述第六指示信息用于指示所述终端不需要重新注册；The terminal receives sixth indication information from the network device, where the sixth indication information is used to indicate that the terminal does not need to re-register;
    所述终端删除所述与所述第一PLMN相关联的被拒绝的网络切片的信息。The terminal deletes the information of the rejected network slice associated with the first PLMN.
  20. 如权利要求1-19中任一所述的方法，其特征在于，所述方法还包括：The method according to any one of claims 1-19, wherein the method further comprises:
    所述终端接收到来自于所述网络设备的第五指示信息，所述第五指示信息用于指示至少一个引导网络切片的信息；The terminal receives fifth indication information from the network device, where the fifth indication information is used to indicate at least one piece of information for guiding network slices;
    所述终端根据所述引导网络切片的信息，向所述网络设备发送第三注册请求，所述第三注册请求包括至少一个所述引导网络切片的信息。The terminal sends a third registration request to the network device according to the information of the guided network slice, where the third registration request includes at least one information of the guided network slice.
  21. 一种通信方法，其特征在于，包括：A communication method, characterized in that it comprises:
    网络设备向所述终端发送至少一个被拒绝的网络切片的信息和第一指示信息，所述网络设备部署于第一PLMN；所述第一指示信息用于指示所述终端在所述第一PLMN进入去注册态后，保留与所述第一PLMN相关联的被拒绝的网络切片的信息。The network device sends at least one rejected network slice information and first indication information to the terminal. The network device is deployed in the first PLMN; the first indication information is used to indicate that the terminal is in the first PLMN. After entering the de-registration state, the rejected network slice information associated with the first PLMN is retained.
  22. 如权利要求21所述的方法，其特征在于，所述网络设备向所述终端发送至少一个被拒绝的网络切片的信息和第一指示信息，包括：The method according to claim 21, wherein the sending, by the network device, to the terminal at least one rejected network slice information and the first indication information comprises:
    所述网络设备向所述终端发送第一注册拒绝消息，所述第一注册拒绝消息用于指示所述第一注册请求被拒绝，所述第一注册拒绝消息包括所述至少一个被拒绝的网络切片的信息以及所述第一指示信息；或者，The network device sends a first registration rejection message to the terminal, where the first registration rejection message is used to indicate that the first registration request is rejected, and the first registration rejection message includes the at least one rejected network Slice information and the first indication information; or,
    所述网络设备向所述终端发送第一去注册请求消息，所述第一去注册请求消息用于指示所述终端在所述第一PLMN执行去注册，所述第一去注册请求消息包括所述至少一个被拒绝的网络切片的信息以及所述第一指示信息。The network device sends a first de-registration request message to the terminal, where the first de-registration request message is used to instruct the terminal to perform de-registration in the first PLMN, and the first de-registration request message includes all The information of the at least one rejected network slice and the first indication information.
  23. 如权利要求22所述的方法，其特征在于，若所述第一去注册请求消息包括所述至少一个被拒绝的网络切片的信息以及所述第一指示信息，所述第一指示信息为重新注册指示信息。The method according to claim 22, wherein if the first deregistration request message includes the information of the at least one rejected network slice and the first indication information, the first indication information is re-registration Registration instructions.
  24. 如权利要求21-23中任一所述的方法，其特征在于，所述第一指示信息用于指示所述终端在所述第一PLMN进入去注册态后，保留因在所述第一PLMN内不可用而被拒绝的网络切片的信息。The method according to any one of claims 21-23, wherein the first indication information is used to instruct the terminal to retain the information in the first PLMN after the first PLMN enters the de-registered state. Information about the network slices that are not available and rejected.
  25. 如权利要求21-23中任一所述的方法，其特征在于，所述第一指示信息用于指示所述终端在所述第一PLMN处于去注册态且所述终端驻留的注册区域或跟踪区域不变后，保留因在所述终端所在的注册区域内不可用而被拒绝的网络切片的信息。The method according to any one of claims 21-23, wherein the first indication information is used to indicate that the terminal is in a de-registered state in the first PLMN and the registration area where the terminal resides or After the tracking area remains unchanged, the information of the network slices rejected due to unavailability in the registration area where the terminal is located is retained.
  26. 如权利要求21-25中任一所述的方法，其特征在于，所述方法还包括：The method according to any one of claims 21-25, wherein the method further comprises:
    所述网络设备接收来自于所述终端的第二注册请求，所述第二注册请求不包括网络切片的信息；Receiving, by the network device, a second registration request from the terminal, where the second registration request does not include network slice information;
    所述网络设备向所述终端发送第二指示信息，所述第二指示信息用于指示所述终端关闭N1模式能力；或者，所述网络设备向所述终端发送第三指示信息，所述第三指示信息用于指示无可用的默认网络切片，以及用于指示所述终端在所述第一PLMN执行PLMN选择后存储所述第一PLMN的信息；或者，所述网络设备向所述终端发送第四指示信息，所述第四指示信息用于指示所述终端执行PLMN选择，以及用于指示所述终端在所述第一PLMN执行PLMN选择后存储所述第一PLMN的信息。The network device sends second instruction information to the terminal, where the second instruction information is used to instruct the terminal to turn off the N1 mode capability; or, the network device sends third instruction information to the terminal, and the first Three indication information is used to indicate that no default network slice is available, and used to instruct the terminal to store the information of the first PLMN after the first PLMN performs PLMN selection; or, the network device sends to the terminal Fourth indication information, where the fourth indication information is used to instruct the terminal to perform PLMN selection, and to instruct the terminal to store the information of the first PLMN after the first PLMN performs PLMN selection.
  27. 一种通信方法，其特征在于，包括：A communication method, characterized in that it comprises:
    网络设备接收来自于终端的第二注册请求消息，所述第二注册请求不包括网络切片的信息，所述网络设备部署于第一PLMN；The network device receives a second registration request message from the terminal, the second registration request does not include network slice information, and the network device is deployed in the first PLMN;
    所述网络设备向所述终端发送第四指示信息，所述第四指示信息用于指示所述终端执行PLMN选择，以及用于指示所述终端在所述第一PLMN执行PLMN选择后存储所述第一PLMN的信息。The network device sends fourth indication information to the terminal, where the fourth indication information is used to instruct the terminal to perform PLMN selection, and to instruct the terminal to store the PLMN selection after the first PLMN performs PLMN selection. Information of the first PLMN.
  28. 如权利要求21-27中任一所述的方法，其特征在于，所述方法还包括：The method according to any one of claims 21-27, wherein the method further comprises:
    所述网络设备向所述终端发送第六指示信息，所述第六指示信息用于指示所述终端不需要重新注册，以及用于指示所述终端删除所述与所述第一PLMN相关联的被拒绝的网络切片的信息。The network device sends sixth indication information to the terminal, where the sixth indication information is used to indicate that the terminal does not need to re-register, and is used to instruct the terminal to delete the information associated with the first PLMN Information about rejected network slices.
  29. 如权利要求21-28中任一所述的方法，其特征在于，所述方法还包括：The method according to any one of claims 21-28, wherein the method further comprises:
    所述网络设备向所述终端发送第五指示信息，所述第五指示信息用于指示至少一个引导网络切片；Sending, by the network device, fifth indication information to the terminal, where the fifth indication information is used to indicate at least one boot network slice;
    所述网络设备接收来自于所述终端的第三注册请求消息，所述第三注册请求消息用于请求接入至少一个所述引导网络切片。The network device receives a third registration request message from the terminal, where the third registration request message is used to request access to at least one of the boot network slices.
  30. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得所述装置执行如权利要求1至20中任一项所述的方法。A communication device, characterized by comprising: a processor, the processor is coupled with a memory, the memory is used to store a program or instruction, when the program or instruction is executed by the processor, the device Perform the method according to any one of claims 1 to 20.
  31. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得所述装置执行如权利要求21至29中任一项所述的方法。A communication device, characterized by comprising: a processor, the processor is coupled with a memory, the memory is used to store a program or instruction, when the program or instruction is executed by the processor, the device Perform the method according to any one of claims 21 to 29.
  32. 一种通信装置，其特征在于，包括用于执行如权利要求1至20中任一所述的方法的单元或模块。A communication device, characterized by comprising a unit or module for executing the method according to any one of claims 1 to 20.
  33. 一种通信装置，其特征在于，包括用于执行如权利要求21至29中任一所述的方法的单元或模块。A communication device, characterized by comprising a unit or module for executing the method according to any one of claims 21 to 29.
  34. 一种通信***，其特征在于，包括如权利要求30或32所述的通信装置以及如权利要求31或33所述的通信装置。A communication system, characterized by comprising the communication device according to claim 30 or 32 and the communication device according to claim 31 or 33.
  35. 一种计算机可读介质，其上存储有程序或指令，其特征在于，所述程序或指令被执行时使得计算机执行如权利要求1至29中任一项所述的方法。A computer-readable medium with a program or instruction stored thereon, wherein the program or instruction when executed causes a computer to execute the method according to any one of claims 1 to 29.
  36. 一种计算机程序产品，其特征在于，当所述计算机程序产品被计算设备执行时，使得所述计算设备执行如权利要求1至29中任一项所述的方法。A computer program product, characterized in that, when the computer program product is executed by a computing device, the computing device is caused to execute the method according to any one of claims 1 to 29.
  37. 一种芯片，其特征在于，包括至少一个处理器和接口；A chip, characterized in that it includes at least one processor and an interface;
    所述接口，用于为所述至少一个处理器提供计算机程序、指令或者数据；The interface is used to provide computer programs, instructions or data for the at least one processor;
    所述至少一个处理器用于执行所述计算机程序或指令，以使得如权利要求1至29中任一项所述的方法被执行。The at least one processor is used to execute the computer program or instruction to cause the method according to any one of claims 1 to 29 to be executed.
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