WO2021196962A1 - Procédé de communication et dispositif de communication - Google Patents

Procédé de communication et dispositif de communication Download PDF

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Publication number
WO2021196962A1
WO2021196962A1 PCT/CN2021/078874 CN2021078874W WO2021196962A1 WO 2021196962 A1 WO2021196962 A1 WO 2021196962A1 CN 2021078874 W CN2021078874 W CN 2021078874W WO 2021196962 A1 WO2021196962 A1 WO 2021196962A1
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WIPO (PCT)
Prior art keywords
upf
information
address
routing
network
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PCT/CN2021/078874
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English (en)
Chinese (zh)
Inventor
陈曦
夏渊
钱宏
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华为技术有限公司
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Publication of WO2021196962A1 publication Critical patent/WO2021196962A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/248—Connectivity information update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure

Definitions

  • the present application relates to the field of communication, and more specifically, to a communication method and communication device.
  • the fifth-generation mobile communication technology is in a period of vigorous development.
  • the 5G wireless communication core network includes the following functions: user plane function (UPF); access and mobility management functions ( access and mobility management function, AMF); session management function (session management function, SMF) and other functions.
  • a user terminal (user equipment, UE) needs to access the UPF of the 5G core network through a radio access network (access network, AN), so that it can access the data network (DN).
  • UPF can also be called UPF entity or network element UPF, which is also applicable to network element SMF and network element AMF.
  • the network element SMF controls the selection and access of UPF.
  • the SMF manages one or more UPFs, and the UE can access and connect to the UPF through the internet protocol (Internet protocol) IP address.
  • Internet protocol internet protocol
  • the UPF when the UPF fails, the UPF will lose all user contexts. During the recovery process, the user's service transmission will be interrupted, and end-to-end awareness is required during the session recovery process of the UPF, and there will be a lot of signaling. The impact will exert greater pressure on the network.
  • This application provides a communication method.
  • Disaster-tolerant UPF publishes low-priority user routes, so that when the UPF fails and the high-priority user routes advertised by it become invalid, the terminal device can use the route conversion and use the disaster-tolerant UPF to publish the routes.
  • Low-priority users route and transmit data, thereby solving the problem of interruption of service transmission when UPF fails, thereby ensuring the continuity of service transmission.
  • a communication method includes: a disaster-tolerant user plane function UPF obtains a first network protocol IP address of a first UPF; and the disaster-tolerant UPF publishes the disaster-tolerant UPF to a first routing network
  • the first routing information the first routing network is a routing network between an access network and a core network, the first routing information corresponds to the first IP address, and the priority of the first routing information Lower than the priority of the second routing information, the second routing information is the uplink routing information of the first UPF, and the second routing information corresponds to the first IP address.
  • the uplink data can be routed, using the first UPF of the disaster-tolerant UPF.
  • the routing information is used for data transmission, thereby avoiding interruption of service transmission and ensuring the continuity of service transmission.
  • the first routing information further includes the tunnel endpoint identifier of the first terminal device served by the first UPF
  • the method further includes: the content
  • the disaster UPF receives the first information sent by the session management function SMF, where the first information includes the tunnel endpoint identifier of the first terminal device.
  • the method further includes: the disaster tolerance UPF acquiring third information, where the third information is used to indicate that each of the multiple UPFs corresponds to IP address segment; receiving fourth information sent by SMF, the fourth information including the second IP address of the first terminal device; sending fifth information to the SMF, the fifth information including the first UPF , Wherein the second IP address belongs to the IP address segment corresponding to the first UPF, so that the SMF can determine the first UPF as the first terminal device’s Service UPF.
  • the method further includes: the disaster-tolerant UPF acquiring sixth information, where the sixth information is used to indicate that each of the multiple UPFs corresponds to IP address segment; assign the second IP address to the first terminal device; send seventh information to the SMF, where the seventh information includes the identifier of the first UPF, where the second IP address belongs to all The IP address segment corresponding to the first UPF is so that the SMF determines the first UPF as the service UPF of the first terminal device according to the seventh information.
  • the disaster-tolerant UPF restores user data to the first UPF by way of private data encapsulation.
  • the disaster recovery UPF restores user data to the first UPF.
  • the restoration process only the information exchange between the SMF and the UPF is required, and the surrounding network elements have no perception, thereby reducing end-to-end perception and avoiding signaling impact.
  • a heartbeat message is maintained between the first UPF and the disaster-tolerant UPF when the first UPF is working normally.
  • a communication method includes: a disaster-tolerant user plane function UPF obtains a second network protocol IP address of a first terminal device served by a first UPF; Publish the third routing information of the disaster-tolerant UPF, the second routing network is a routing network between a core network and a data network, the third routing information corresponds to the second IP address, and the third The priority of the routing information is lower than the priority of the fourth routing information, the fourth routing information is the downlink routing information of the first UPF, and the fourth routing information corresponds to the second IP address.
  • the routing network By publishing the third routing information corresponding to the first UPF to the routing network, when the first UPF fails and the fourth routing information of the first UPF becomes invalid, the downstream data can be routed converted, and the third routing information of the disaster-tolerant UPF can be used.
  • the routing information is used for data transmission, thereby avoiding interruption of service transmission and ensuring the continuity of service transmission.
  • the method further includes: the disaster tolerance UPF receiving second information sent by the session management function SMF, the second information including channel information of the access network
  • the method further includes: the disaster tolerance UPF sending downlink data to the first terminal device according to the channel information.
  • the method further includes: the disaster tolerance UPF acquiring third information, where the third information is used to indicate the corresponding UPF of each of the multiple UPFs IP address segment; receiving fourth information sent by SMF, the fourth information including the second IP address of the first terminal device; sending fifth information to the SMF, the fifth information including the first UPF , Wherein the second IP address belongs to the IP address segment corresponding to the first UPF, so that the SMF can determine the first UPF as the first terminal device’s Service UPF.
  • the method further includes: the disaster tolerance UPF acquiring sixth information, where the sixth information is used to indicate the corresponding UPF of each of the multiple UPFs IP address segment; assign the second IP address to the first terminal device; send seventh information to the SMF, where the seventh information includes the identifier of the first UPF, where the second IP address belongs to all The IP address segment corresponding to the first UPF is so that the SMF determines the first UPF as the service UPF of the first terminal device according to the seventh information.
  • the disaster-tolerant UPF restores user data to the first UPF by way of private data encapsulation.
  • the disaster recovery UPF restores user data to the first UPF.
  • the restoration process only the information exchange between the SMF and the UPF is required, and the surrounding network elements have no perception, thereby reducing end-to-end perception and avoiding signaling impact.
  • a heartbeat message is maintained between the first UPF and the disaster-tolerant UPF when the first UPF is working normally.
  • a communication method includes: a session management function SMF sends first activation request information to a disaster tolerance user name function UPF, where the first activation request information is used to request activation of a first terminal device,
  • the disaster recovery UPF is used to obtain the first network protocol IP address of the first UPF, and publish the first routing information of the disaster recovery UPF to the first routing network
  • the first routing network is an access network and A routing network between core networks
  • the first routing information corresponds to the first IP address
  • the priority of the first routing information is lower than the priority of the second routing information
  • the second routing information is The uplink routing information of the first UPF
  • the second routing information corresponds to the first IP address
  • the disaster recovery UPF is used to obtain the second IP address of the first terminal device served by the first UPF
  • publish the third routing information of the disaster-tolerant UPF to a second routing network, where the second routing network is a routing network between a core network and a data network, and the third routing information is
  • the SMF receives the first response information sent by the disaster recovery UPF, and the response information includes The identifier of the first UPF; the SMF sends a second activation request to the first UPF according to the first response information, and the second activation request information is used to request activation of the first terminal device; the SMF Receiving second response information sent by the first UPF, where the second response information includes the first IP address; the SMF sends third activation request information to the disaster recovery UPF, the third activation request information Including channel information of the access network, the channel information is used for the downlink data transmission of the disaster-tolerant UPF; the SMF receives the third response information sent by the disaster-tolerant UPF, and the third response information is used to indicate the The disaster recovery UPF downlink channel has been opened; the SMF sends fourth activation request information to the first UPF, the fourth activation request information includes channel information of the access network, and the channel information is
  • SMF activates the same user in the first UPF and disaster-tolerant UPF respectively, so that when the first UPF fails and its routing fails, it can use the first routing information and the third routing information released by the disaster-tolerant UPF through route conversion. Realize data transmission, thereby avoiding the interruption of data transmission and ensuring the continuity of service transmission.
  • the first activation request information when the IP address of the first terminal device is allocated by the SMF, the first activation request information further includes the The second IP address.
  • the first response information when the IP address of the first terminal device is allocated by the disaster tolerance UPF, the first response information further includes the The second IP address.
  • the second response information and the third activation request The information also includes the tunnel endpoint identifier of the first terminal device.
  • the method further includes: after the first UPF failure is restored, the SMF restores user data to the first UPF by way of private data encapsulation .
  • a communication device in a fourth aspect, includes: an acquisition module, configured to acquire a first network protocol IP address of a first user plane function UPF; and a sending module, configured to publish a disaster-tolerant UPF to a first routing network
  • the first routing information is a routing network between an access network and a core network, the first routing information corresponds to the first IP address, and the priority of the first routing information Lower than the priority of the second routing information
  • the second routing information is the uplink routing information of the first UPF, and the second routing information corresponds to the first IP address.
  • the uplink data can be routed, using the first UPF of the disaster-tolerant UPF.
  • the routing information is used for data transmission, thereby avoiding interruption of service transmission and ensuring the continuity of service transmission.
  • the first routing information further includes the tunnel endpoint identifier of the first terminal device served by the first UPF
  • the apparatus further includes: a receiving module, It is used to receive the first information sent by the session management function SMF, where the first information includes the tunnel endpoint identifier of the first terminal device.
  • the acquiring module is further configured to: acquire third information, where the third information is used to indicate the IP address segment corresponding to each UPF of the multiple UPFs
  • the receiving module is also used to receive fourth information sent by SMF, the fourth information includes the second IP address of the first terminal device; the sending module is also used to: send fifth information to the SMF ,
  • the fifth information includes the identifier of the first UPF, wherein the second IP address belongs to the IP address segment corresponding to the first UPF, so that the SMF can combine the The first UPF is determined to be the serving UPF of the first terminal device.
  • the acquiring module is further configured to: acquire sixth information, where the sixth information is used to indicate the IP address segment corresponding to each UPF of the multiple UPFs
  • the device further includes: a processing module, configured to allocate the second IP address to the first terminal device; the sending module is also configured to: send seventh information to the SMF, the seventh information includes the The identifier of the first UPF, where the second IP address belongs to the IP address segment corresponding to the first UPF, so that the SMF can determine the first UPF as the first UPF according to the seventh information.
  • Service UPF for terminal equipment is further configured to: acquire sixth information, where the sixth information is used to indicate the IP address segment corresponding to each UPF of the multiple UPFs
  • the device further includes: a processing module, configured to allocate the second IP address to the first terminal device; the sending module is also configured to: send seventh information to the SMF, the seventh information includes the The identifier of the first UPF, where the second IP address belongs to the IP address segment corresponding to the first UPF, so that the S
  • the device further includes: a data recovery module, configured to send a private data encapsulation method to the first UPF after the failure of the first UPF is recovered. Restore user data.
  • a data recovery module configured to send a private data encapsulation method to the first UPF after the failure of the first UPF is recovered. Restore user data.
  • the disaster recovery UPF restores user data to the first UPF.
  • the restoration process only the information exchange between the SMF and the UPF is required, and the surrounding network elements have no perception, thereby reducing end-to-end perception and avoiding signaling impact.
  • heartbeat messages are maintained during and between the disaster recovery UPF and the first UPF during normal operation.
  • a communication device in a fifth aspect, includes: an acquisition module, configured to acquire a second network protocol IP address of a first terminal device served by a first user plane function UPF; and a sending module, configured to send a second
  • the routing network publishes the third routing information of the disaster-tolerant UPF, the second routing network is a routing network between the core network and the data network, the third routing information corresponds to the second IP address, and the third The priority of the routing information is lower than the priority of the fourth routing information, the fourth routing information is the downlink routing information of the first UPF, and the fourth routing information corresponds to the second IP address.
  • the routing network By publishing the third routing information corresponding to the first UPF to the routing network, when the first UPF fails and the fourth routing information of the first UPF becomes invalid, the downstream data can be routed converted, and the third routing information of the disaster-tolerant UPF can be used.
  • the routing information is used for data transmission, thereby avoiding interruption of service transmission and ensuring the continuity of service transmission.
  • the device further includes: a receiving module, configured to receive second information sent by the session management function SMF, where the second information includes channel information of the access network
  • the sending module is further configured to send downlink data to the first terminal device according to the channel information.
  • the obtaining module is further configured to: obtain third information, where the third information is used to indicate the IP address segment corresponding to each UPF of the plurality of UPFs
  • the receiving module is also used to receive fourth information sent by SMF, the fourth information includes the second IP address of the first terminal device; the sending module is also used to: send fifth information to the SMF ,
  • the fifth information includes the identifier of the first UPF, wherein the second IP address belongs to the IP address segment corresponding to the first UPF, so that the SMF can combine the The first UPF is determined to be the serving UPF of the first terminal device.
  • the acquiring module is further configured to: acquire sixth information, where the sixth information is used to indicate the IP address segment corresponding to each UPF of the multiple UPFs
  • the device further includes: a processing module, configured to allocate the second IP address to the first terminal device; the sending module is also configured to: send seventh information to the SMF, the seventh information includes the The identifier of the first UPF, where the second IP address belongs to the IP address segment corresponding to the first UPF, so that the SMF can determine the first UPF as the first UPF according to the seventh information.
  • Service UPF for terminal equipment is further configured to: acquire sixth information, where the sixth information is used to indicate the IP address segment corresponding to each UPF of the multiple UPFs
  • the device further includes: a processing module, configured to allocate the second IP address to the first terminal device; the sending module is also configured to: send seventh information to the SMF, the seventh information includes the The identifier of the first UPF, where the second IP address belongs to the IP address segment corresponding to the first UPF, so that the S
  • the device further includes: a data recovery module, configured to send a private data encapsulation method to the first UPF after the failure of the first UPF is recovered. Restore user data.
  • a data recovery module configured to send a private data encapsulation method to the first UPF after the failure of the first UPF is recovered. Restore user data.
  • the disaster recovery UPF restores user data to the first UPF.
  • the restoration process only the information exchange between the SMF and the UPF is required, and the surrounding network elements have no perception, thereby reducing end-to-end perception and avoiding signaling impact.
  • heartbeat messages are maintained during and between the disaster recovery UPF and the first UPF during normal operation.
  • a communication device comprising: a sending module, configured to send first activation request information to a disaster-tolerant user plane function UPF, where the first activation request information is used to request activation of a first terminal device ,
  • the disaster tolerance UPF is used to obtain the first network protocol IP address of the first UPF and publish the first routing information of the disaster tolerance UPF to the first routing network
  • the first routing network is the access network and the core
  • the first routing information corresponds to the first IP address
  • the priority of the first routing information is lower than the priority of the second routing information
  • the second routing information is all The uplink routing information of the first UPF, the second routing information corresponds to the first IP address, or the disaster tolerance UPF is used to obtain the second IP address of the first terminal device served by the first UPF,
  • publish the third routing information of the disaster-tolerant UPF to a second routing network
  • the second routing network is a routing network between a core network and a data network
  • SMF activates the same user in the first UPF and disaster-tolerant UPF respectively, so that when the first UPF fails and its routing fails, it can use the first routing information and the third routing information released by the disaster-tolerant UPF through route conversion. Realize data transmission, thereby avoiding the interruption of data transmission and ensuring the continuity of service transmission.
  • the apparatus further includes: a processing module configured to allocate an IP address for the first terminal device; and the first activation request information further includes the The second IP address of the first terminal device.
  • the first response information when the IP address of the first terminal device is allocated by the disaster tolerance UPF, the first response information further includes the IP address.
  • the tunnel endpoint identifier of the first terminal device when allocated by the first UPF, the second response message and the third activation request message It also includes the tunnel endpoint identifier of the first terminal device.
  • the device further includes: a data recovery module, configured to send a private data package to the first UPF after the first UPF fails to recover. Restore user data.
  • a data recovery module configured to send a private data package to the first UPF after the first UPF fails to recover. Restore user data.
  • a communication device in a seventh aspect, includes a unit for implementing the method in the first aspect or any possible implementation of the first aspect; or for implementing the second aspect or any of the second aspects.
  • a computer-readable storage medium is provided, and a computer program is stored on the computer-readable storage medium.
  • the device executes any possible method as in the first aspect or the first aspect.
  • the method in the implementation manner, or causes the apparatus to execute the method in any possible implementation manner of the second aspect or the second aspect, or causes the apparatus to execute the method in any possible implementation manner of the third aspect or the third aspect
  • a chip system in a ninth aspect, includes a processor, configured to call and run a computer program from a memory, so that a communication device installed with the chip system executes the first aspect or the first aspect.
  • the method in any possible implementation manner; or the communication device installed with the chip system executes the method in the second aspect or any possible implementation manner of the second aspect, or the communication device installed with the chip system Perform the method in the third aspect or any possible implementation of the third aspect.
  • Fig. 1 is a schematic diagram of a 5G communication system architecture in the prior art.
  • Figure 2 is a schematic diagram of a UPF failure recovery process in the prior art.
  • Fig. 3 is a schematic diagram of a communication method according to an embodiment of the present application.
  • Fig. 4 is a schematic diagram of another communication method according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a partial architecture of a system according to an embodiment of the present application.
  • Fig. 6 is a schematic diagram of a user activation process according to an embodiment of the present application.
  • Fig. 7 is a schematic diagram of a data transmission path in the prior art.
  • FIG. 8 is a schematic diagram of a UPF failure detection and recovery process according to an embodiment of the present application.
  • Fig. 9 is a schematic diagram of a data transmission path according to an embodiment of the present application.
  • Fig. 10 is a schematic diagram of a communication device according to an embodiment of the present application.
  • Fig. 11 is a schematic diagram of another communication device according to an embodiment of the present application.
  • Fig. 12 is a schematic diagram of another communication device according to an embodiment of the present application.
  • the terminal equipment in the embodiments of this application may refer to user equipment, access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device.
  • the terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or future evolution of the public land mobile network (PLMN) Terminal equipment, etc., this embodiment of the present application is not limited thereto.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the network device in the embodiment of the present application may be a device used to communicate with terminal devices, and the network device may be a global system of mobile communication (GSM) system or code division multiple access (CDMA)
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • the base transceiver station (BTS) in the LTE system can also be the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolutionary base station (evolutional base station) in the LTE system.
  • NodeB, NB base station
  • WCDMA wideband code division multiple access
  • evolutional base station evolutionary base station
  • NodeB eNB or eNodeB
  • it can also be a wireless controller in a cloud radio access network (CRAN) scenario
  • the network device can be a relay station, an access point, a vehicle-mounted device, a wearable device, and the future
  • the network equipment in the 5G network or the network equipment in the future evolved PLMN network, etc., are not limited in the embodiment of the present application.
  • the 5G wireless communication core network includes the following functions: User plane function (UPF) is the entity that forwards user plane data.
  • the external protocol data unit (PUD) Session anchor point of the data network interconnection, with message routing and forwarding, message detection, user plane policy execution, legal monitoring, traffic usage report, quality of service (quality of service) service, QoS) processing and other functions; access and mobility management function (access and mobility management function, AMF) is mainly responsible for connecting with wireless, terminating the radio access network (RAN) CP interface (N2), terminating non- Access layer (non-access stratum, NAS) (N1) and NAS encryption and integrity protection, registration management, connection management, reachability management, mobility management, transfer of SM messages between UE and SMF, UE mobility events Notification and other functions; session management function (session management function, SMF), which provides session management functions such as session establishment, modification and release, including the tunnel maintenance function between UPF and
  • the user terminal UE needs to access the UPF of the 5G core network through a radio access network (RAN), so that it can access the data network (DN).
  • RAN radio access network
  • DN data network
  • the network element SMF controls the selection and access of UPF.
  • the SMF manages one or more UPFs, and the UE can access and connect with the UPF through an IP address.
  • the 5G protocol supports multiple UPF scenarios.
  • Figure 1 shows a schematic diagram of a 5G system architecture in the prior art.
  • the figure includes core network elements AMF, SMF, UPF, as well as UE and access network ( R) AN, data network DN, the solid line in the figure represents the actual data transmission path, UE-AN-UPF-DN, where the signal transmission between AN and UPF is through logical interface N3, and between SMF and UPF through logic
  • the interface N4 performs signal transmission.
  • the SMF will re-establish a connection with the UPF and resume the user session. If the UPF failure cannot be recovered, the SMF will reselect the UPF and then recreate the PDU Session for the user.
  • FIG. 2 shows a schematic diagram of a UPF failure recovery process in the prior art.
  • the method 200 includes steps S210 to S280.
  • S210 The SMF sends a heartbeat request to the UPF to determine whether the UPF is alive.
  • S220 The UPF receives the heartbeat request from the SMF, and replies to the heartbeat response, and the response carries a recovery time stamp.
  • S230 the UPF fails and restarts.
  • S240 After the UPF is restored, receive the heartbeat request message from the SMF.
  • S250 UPF replies with a heartbeat response, and carries a new recovery value in the recovery time stamp.
  • S260 The SMF discovers that the new recover value is received, deletes all user contexts, and sends a packet forwarding control protocol (PFCP) link setup request (association setup request) to establish an N4 association.
  • PFCP packet forwarding control protocol
  • association setup request UPF returns a response (PFCP association setup response).
  • S280 After the link is established, restore the PFCP session in the UPF.
  • PFCP packet forwarding control protocol
  • FIG. 3 shows a schematic diagram of a communication method according to an embodiment of the present application. As shown in FIG. 3, the method 300 includes steps S310 and S320, which are described in detail below.
  • the disaster tolerance user plane function UPF obtains the first network protocol IP address of the first UPF.
  • the disaster-tolerant UPF publishes the first routing information of the disaster-tolerant UPF to a first routing network.
  • the first routing network is a routing network between an access network and a core network
  • the first routing information corresponds to the first IP address
  • the priority of the first routing information is low
  • the second routing information is the uplink routing information of the first UPF
  • the second routing information corresponds to the first IP address.
  • Disaster recovery UPF publishes low-priority first routing information corresponding to the second routing information of the first UPF to the first routing network, so that when the first UPF fails and the second route fails, the uplink data can be routed Conversion, using the first routing information issued by the disaster recovery UPF for data transmission, thereby avoiding service transmission interruption and ensuring the continuity of service transmission.
  • the first routing information may also include the tunnel endpoint identifier of the first terminal device served by the first UPF.
  • the disaster-tolerant UPF may receive the first terminal device sent by the SMF.
  • the first information may include the tunnel endpoint identifier of the first terminal device.
  • the disaster-tolerant UPF may obtain third information, which is used to indicate the IP address segment corresponding to each of the multiple UPFs; then the disaster-tolerant UPF receives the fourth information sent by the SMF, the fourth information It may include the second IP address of the first terminal device; the disaster recovery UPF sends fifth information to the SMF, and the fifth information may include the identification of the first UPF, where the second IP address belongs to the IP address segment corresponding to the first UPF, so that According to the fifth information, the SMF determines the first UPF as the serving UPF of the first terminal device.
  • the disaster-tolerant UPF can acquire sixth information, and the sixth information is used to indicate the IP address segment corresponding to each UPF in the multiple UPFs; the disaster-tolerant UPF can allocate the second IP to the first terminal device
  • the disaster recovery UPF sends seventh information to the SMF.
  • the seventh information includes the identifier of the first UPF, where the second IP address belongs to the IP address segment corresponding to the first UPF, so that the SMF can follow the seventh Information, the first UPF is determined as the service UPF of the first terminal device.
  • the seventh information may include the second IP address segment.
  • each UPF is configured with an IP address segment belonging to itself and an address segment assigned to the UE.
  • the disaster-tolerant UPF may restore user data to the first UPF through private data encapsulation.
  • the private data encapsulation format may be in the form of a table, which may include F-TEID, session management (SM) policy, IP address, tunnel information set, etc.
  • data can also be restored to the first UPF through SMF.
  • the restoration process shown in S260 to S280 of FIG. A UPF restores user data.
  • the disaster-tolerant UPF and/or SMF restore data to the first UPF user-by-user recovery may be adopted.
  • the heartbeat message may be maintained with the disaster recovery UPF.
  • Fig. 4 is a schematic diagram of another communication method according to an embodiment of the present application. As shown in FIG. 4, the method 400 includes S410 and S420.
  • the disaster tolerance user plane function UPF obtains the second network protocol IP address of the first terminal device served by the first UPF.
  • the second IP address of the above-mentioned first terminal device may be allocated by SMF, or may be allocated by disaster-tolerant UPF.
  • the disaster-tolerant UPF publishes third routing information of the disaster-tolerant UPF to a second routing network.
  • the second routing network is a routing network between the core network and the data network
  • the third routing information corresponds to the second IP address
  • the priority of the third routing information is lower than the priority of the fourth routing information
  • the fourth routing information is downlink routing information of the first UPF
  • the fourth routing information corresponds to the second IP address.
  • the downlink data can be Perform route conversion and use the third route information issued by the disaster recovery UPF for data transmission, thereby avoiding service transmission interruption and ensuring the continuity of service transmission.
  • the disaster recovery UPF may receive a second message sent by the SMF, where the second message includes channel information of the access network, and the disaster recovery UPF may forward downlink data to the access network according to the channel information of the access network.
  • the channel information here is the same as the process and content of the UPF receiving the channel information sent by the SMF in the prior art, and the embodiment of the present application will not repeat it too much.
  • the disaster recovery UPF may also determine the first UPF through information interaction with the SMF, or restore user data to the first UPF through a private data encapsulation format, and the content is the same as that described in the above method 300. I won't go into too much detail here.
  • the disaster-tolerant UPF in this application can be used as a centralized point of UE address allocation of a group of UPF in architecture.
  • Correspondence such as UPF1, UPF2, UPF3, UPF4 and the address segment (segment) seg1, seg2, seg3, seg4, respectively.
  • the UPF may use corresponding identifiers to indicate these correspondences, for example, UPF1-seg1 is indicated by 1, or UPF1, and the form of the identifier is not limited in this application.
  • the disaster recovery UPF can directly obtain the correspondences maintained by the disaster recovery UPF, and return the corresponding identification to the SMF according to the correspondences and the assigned IP addresses of the terminal devices.
  • the correspondence between a group of UPFs is maintained in a disaster-tolerant UPF
  • the group of UPFs may not be selected as the UPF for data transmission. After the disaster recovery UPF is restored, the group of UPFs can be selected. It should be understood that the corresponding relationship maintained by the disaster recovery UPF in the embodiment of the present application may be implemented in the form of local configuration.
  • the SMF can be more efficient when activating users in the disaster recovery UPF and UPF, and the reliability of data transmission can be improved.
  • Fig. 6 shows a schematic diagram of a user activation process in an embodiment of the present application.
  • the first IP address, the second IP address, and the first terminal device are also used for description in the embodiments of the present application.
  • the method includes steps S610 to S6170, where S610 to S630 are the same as in the prior art.
  • the user initiates a PDU session establishment request message, and the AMF calls the service interface to notify the SMF to activate the user.
  • the SMF initiates a session establishment request to the disaster recovery UPF.
  • the request message sent by the SMF may carry the second IP address and F-TEID of the first terminal device.
  • the SMF can obtain the binding relationship between each UPF and the user address segment by means of local configuration.
  • the SMF can also obtain the correspondence between the disaster-tolerant UPF and a group of user address segments of the UPF by means of local configuration.
  • the disaster recovery UPF returns a session establishment request response message.
  • the response message may include the identifier of the first UPF.
  • the identifier of the first UPF is used to indicate the correspondence between the first UPF and the address segment of the terminal device.
  • the identifier of the UPF may be represented by the ID, index, or name of the first UPF.
  • the response message may also include the allocated second IP address of the first terminal device.
  • the disaster recovery UPF can Publish low-priority user routing information, because the low-priority user routing is determined by the disaster recovery UPF according to the assigned second IP address of the terminal device.
  • the disaster recovery UPF can learn the correspondence between a group of UPFs and user address segments through local configuration, and the correspondence can be represented by the UPF identifier, and the disaster recovery UPF can also acquire a group of UPFs through local configuration. Own IP address.
  • the SMF selects a first UPF from multiple UPFs according to the first UPF identifier received in the above steps, and sends a session establishment request message to the first UPF, where the request message carries the second IP address allocated by the first terminal device And local traffic offloading rules, and then the first UPF can publish high-priority user routes.
  • the first UPF returns a session establishment response message to the SMF.
  • the response message may carry the allocated F-TEID of the terminal device.
  • the SMF sends an N1 N2 message transfer message to the AMF, where N1 message is sent to the terminal device to inform the UE of the default Qos rule (rule), the second IP address assigned to the terminal device, etc. , N2 message is sent to the RAN side, used to inform the RAN side of the selected first UPF tunnel address and the F-TEID of the corresponding terminal device, that is, uplink channel information, and QOS flow, etc.
  • AMF is mainly used for information Transit.
  • the AMF sends a N2 PDU session request message to the RAN side.
  • the AMF sends the NAS message including the PDU session ID for the terminal device, the NAS message received for establishing the PUD session, etc., to the RAN side.
  • the message also carries the N2 message in the previous step.
  • the RAN side sends an AN-specific signaling exchange related to the information received from the SMF to the UE.
  • the RAN sends an N2 PDU session response message to the SMF.
  • the response message may include tunnel information of the RAN.
  • the RAN channel information is the downlink access network address of the N3 channel corresponding to the PDU session.
  • the channel information of this RAN is Determined by the RAN side. Go to step S6110, and the data uplink channel is opened.
  • S6120 The AMF sends update request information to the SMF, and the information may include the channel information of the AN. S6130.
  • the SMF sends an N4 session modification request message to the disaster recovery UPF.
  • the message can carry the corresponding forwarding rule and the channel information on the RAN side.
  • the F-TEID of the terminal device is allocated by the first UPF
  • the channel information on the local side allocated by the first UPF may also be carried here, and the channel information on the local side may include the first UPF tunnel address and the F-TEID of the terminal device.
  • S6140 The disaster recovery UPF sends an N4 session modification response message to the SMF.
  • S6150 The SMF sends an N4 session modification request message to the selected first UPF.
  • the message may carry the corresponding forwarding rule and the channel information on the RAN side.
  • S6160 The selected first UPF sends an N4 session modification response message. At this point, the downlink data has also been opened up.
  • FIG. 7 shows the data uplink and downlink path when the UPF is working normally in the prior art.
  • the RAN side discards the data message to the corresponding uplink channel information according to the uplink channel information in the N2 message obtained in S690 in Figure 6 Data routing.
  • the high-priority user route advertised by it is effective, so the data message reaches the N3 logical interface of the corresponding selected UPF through the high-priority user route.
  • the first UPF Remove the IP header belonging to the first UPF of the data packet, and only keep the destination IP that the user visits. After the UPF forwards the data packet with the removed UPF IP address, the data packet reaches the data network DN corresponding to the destination IP, and the uplink ends. .
  • the data network sends a downlink message that carries the second IP address of the terminal device.
  • the data message reaches the first UPF through the first UPF's high-priority user route.
  • the data packet is encapsulated with the IP header of the first UPF and arrives at the RAN according to the RAN channel information in step S6110 in FIG. 6. It should be understood that this application does not improve the data transmission between the UE and the RAN.
  • the data transmission process is an existing technology, and this application will not go into details here.
  • Fig. 8 shows a schematic diagram of the UPF failure detection and recovery process of an embodiment of the present application. As shown in Fig. 8, S810, data transmission before the UPF failure, the data transmission process is shown in Fig. 7, and will not be repeated here.
  • S820 The disaster recovery UPF sends an N4 heartbeat request message to the UPF.
  • S830 the UPF sends an N4 heartbeat response message to the disaster recovery UPF, and the disaster recovery UPF confirms the UPF alive according to the heartbeat response message.
  • the SMF may also send a heartbeat request message to the UPF.
  • the specific steps are shown in Figure 2.
  • a schematic diagram of a UPF failure recovery process in the prior art is presented.
  • S840 UPF is faulty.
  • S850 The disaster recovery UPF sends an N4 heartbeat request message to the UPF to confirm whether the UPF returns to normal.
  • S860 when the UPF is still in a fault state, the low-priority user route of the disaster-tolerant UPF takes effect, and the low-priority user route may be advertised by the disaster-tolerant UPF during the activation process in FIG. 6, or the low-priority user The route can also be advertised in this step.
  • FIG. 9 shows a schematic diagram of data transmission through disaster recovery UPF during a UPF failure in an embodiment of the present application.
  • the route of high priority users of UPF fails, and data packets pass disaster recovery.
  • UPF performs transmission.
  • the RAN receives the uplink message from the UE, it will discard the data message to the corresponding user route according to the uplink channel information obtained in S690 in Figure 6.
  • the UPF The high-priority user route of the data packet fails, so the data message is transmitted to the N3 logical interface of the disaster-tolerant UPF through the low-priority user route advertised by the disaster-tolerant UPF.
  • the disaster recovery UPF also removes the UPF IP header of the data message, and then discards the data message that retains the access destination IP address, and the data message arrives according to the access destination IP address Data network DN.
  • the message carries an identifier such as QFI, during disaster recovery UPF-C data transmission, special processing without packet loss is required to ensure that the service flow is not damaged and the service is not interrupted.
  • the DN sends a data message carrying the IP address of the terminal device.
  • the data message reaches the disaster recovery UPF through the low-priority user route, and the disaster recovery UPF seals the IP header of the data message with UPF IP
  • the RAN channel information forwarded in step S6110 in Figure 6 to the RAN side, and then to the corresponding UE through the AN side, it should be understood that the data transmission process between the UE and the AN is an existing technology, and this application will not do it here. Too much detail.
  • S880 user context recovery
  • the UPF sends a heartbeat response message to the disaster recovery UPF, and the disaster recovery UPF confirms that the UPF has returned to normal.
  • the UPF can also send a heartbeat response message to the SMF, and the SMF confirms that the UPF has returned to normal;
  • S880b SMF or disaster recovery UPF restores user data to UPF.
  • User data can include F-TEID, SM policy, tunnel information set, etc.
  • SMF can initiate an activation process to UPF and send user data to UPF according to steps S660 and S670 in Figure 6, or SMF can also encapsulate user context information in a private data encapsulation format (optional
  • the context information can be a table), interact with the user, and restore the user data; or the user data can be restored to the UPF through the disaster recovery UPF.
  • the disaster recovery UPF can use the private data encapsulation format to perform the user context information.
  • Encapsulation (optionally, the context information can be a table), interact with the user, and restore the user's data. It should be understood that when the user data is restored to the UPF through the SMF or the disaster-tolerant UPF, the user data information is stored in the SMF or the disaster-tolerant UPF.
  • SMF or disaster recovery UPF restores user data to UPF until all user data is restored.
  • S890, SMF or disaster recovery UPF notifies UPF that the information is restored, and UPF publishes high-priority user routes and N3 logical interfaces. It should be understood that the user routes and logical interfaces are the same as before the UPF failure.
  • S8100 after the high-priority user route is released, the UPF resumes data transmission, and the transmission path becomes: uplink RAN->UPF->DN, and downlink DN->UPF->RAN. The transmission process is the same as the foregoing process, and will not be repeated here.
  • FIG. 10 shows a schematic diagram of a communication device according to an embodiment of the present application.
  • the device 1000 includes an acquiring module 1100 and a sending module 1200.
  • the obtaining module is used to obtain the first network protocol IP address of the first user plane function UPF; the sending module is used to publish the first routing information of the disaster recovery UPF to the first routing network, and the first routing network is the access network and the core
  • the first routing information corresponds to the first IP address, and the priority of the first routing information is lower than the priority of the second routing information, and the second routing information is all
  • the second routing information corresponds to the first IP address.
  • the first routing information further includes the tunnel endpoint identifier of the first terminal device served by the first UPF
  • the apparatus further includes: a receiving module for receiving the first information sent by the session management function SMF, The first information includes the tunnel endpoint identifier of the first terminal device.
  • the acquiring module is further configured to: acquire third information, where the third information is used to indicate the IP address segment corresponding to each UPF in a plurality of UPFs; the receiving module is also configured to receive SMF sent Fourth information, where the fourth information includes the second IP address of the first terminal device; the sending module is further configured to: send fifth information to the SMF, where the fifth information includes the first UPF , Wherein the second IP address belongs to the IP address segment corresponding to the first UPF, so that the SMF can determine the first UPF as the first terminal device’s Service UPF.
  • the acquisition module is further configured to: acquire sixth information, where the sixth information is used to indicate the IP address segment corresponding to each UPF among the multiple UPFs;
  • the device further includes: a processing module, configured to Allocate the second IP address to the first terminal device;
  • the sending module is further configured to: send seventh information to the SMF, where the seventh information includes the identifier of the first UPF, where the second The IP address belongs to the IP address segment corresponding to the first UPF, so that the SMF determines the first UPF as the service UPF of the first terminal device according to the seventh information.
  • the device further includes: a data recovery module, configured to recover user data to the first UPF by way of private data encapsulation after the failure of the first UPF is recovered.
  • a data recovery module configured to recover user data to the first UPF by way of private data encapsulation after the failure of the first UPF is recovered.
  • a heartbeat message is maintained between the disaster recovery UPF and the first UPF during normal operation.
  • FIG. 11 shows a schematic diagram of another communication device according to an embodiment of the present application.
  • the device 1100 includes an obtaining module 1110 and a sending module 1120.
  • the obtaining module is used to obtain the second network protocol IP address of the first terminal device served by the first user plane function UPF; the sending module is used to publish the third routing information of the disaster-tolerant UPF to the second routing network, the second routing network Is the routing network between the core network and the data network, the third routing information corresponds to the second IP address, and the priority of the third routing information is lower than the priority of the fourth routing information, the first The fourth routing information is downlink routing information of the first UPF, and the fourth routing information corresponds to the second IP address.
  • the device further includes: a receiving module, configured to receive second information sent by the session management function SMF, the second information includes channel information of the access network, and the sending module is further configured to: Channel information, sending downlink data to the first terminal device.
  • a receiving module configured to receive second information sent by the session management function SMF, the second information includes channel information of the access network
  • the sending module is further configured to: Channel information, sending downlink data to the first terminal device.
  • the acquiring module is further configured to: acquire third information, where the third information is used to indicate the IP address segment corresponding to each UPF in a plurality of UPFs; the receiving module is also configured to receive SMF sent Fourth information, where the fourth information includes the second IP address of the first terminal device; the sending module is further configured to: send fifth information to the SMF, where the fifth information includes the first UPF , Wherein the second IP address belongs to the IP address segment corresponding to the first UPF, so that the SMF can determine the first UPF as the first terminal device’s Service UPF.
  • the acquisition module is further configured to: acquire sixth information, where the sixth information is used to indicate the IP address segment corresponding to each UPF among the multiple UPFs;
  • the device further includes: a processing module, configured to Allocate the second IP address to the first terminal device;
  • the sending module is further configured to: send seventh information to the SMF, where the seventh information includes the identifier of the first UPF, where the second The IP address belongs to the IP address segment corresponding to the first UPF, so that the SMF determines the first UPF as the service UPF of the first terminal device according to the seventh information.
  • the device further includes: a data recovery module, configured to recover user data to the first UPF by way of private data encapsulation after the failure of the first UPF is recovered.
  • a data recovery module configured to recover user data to the first UPF by way of private data encapsulation after the failure of the first UPF is recovered.
  • a heartbeat message is maintained between the disaster recovery UPF and the first UPF during normal operation.
  • FIG. 12 shows a schematic diagram of another communication device according to an embodiment of the present application.
  • the device 1200 includes a sending module 1210 and a receiving module 1220.
  • the sending module is configured to send first activation request information to the disaster tolerance user plane function UPF, where the first activation request information is used to request activation of the first terminal device, wherein the disaster tolerance UPF is used to obtain the first network protocol of the first UPF IP address, and publish the first routing information of the disaster-tolerant UPF to the first routing network.
  • the first routing network is the routing network between the access network and the core network.
  • the first routing information is related to the first routing information.
  • the second routing information is the uplink routing information of the first UPF, and the second routing information is The first IP address corresponds, or the disaster recovery UPF is used to obtain the second IP address of the first terminal device served by the first UPF, and the disaster recovery UPF publishes the information of the disaster recovery UPF to the second routing network.
  • the second routing network is a routing network between a core network and a data network, the third routing information corresponds to the second IP address, and the priority of the third routing information is lower than Priority of the fourth routing information, the fourth routing information is the downlink routing information of the first UPF, the fourth routing information corresponds to the second IP address, and the first terminal device
  • the second IP address belongs to the IP address segment corresponding to the first UPF
  • the receiving module is configured to receive first response information sent by the disaster-tolerant UPF, where the response information includes the identifier of the first UPF, wherein the first UPF
  • the second IP address of a terminal device belongs to the IP address segment corresponding to the first UPF
  • the sending module is further configured to: send a second activation request to the first UPF according to the first response information, and The second activation request information is used to request activation of the first terminal device;
  • the receiving module is also used to: receive second response information sent by the first UPF, where the second response information includes the first IP address;
  • the sending module
  • the apparatus further includes: a processing module configured to allocate an IP address to the first terminal device; and the first activation request information further includes the second IP address of the first terminal device.
  • the first response information further includes the IP address of the first terminal device.
  • the second response message and the third activation request message further include the tunnel endpoint identifier of the first terminal device symbol.
  • the device further includes:
  • the data recovery module is configured to recover user data to the first UPF by way of private data encapsulation after the failure of the first UPF is recovered.
  • the disclosed device and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the modules is only a logical function division, and there may be other division methods in actual implementation.
  • the method in the embodiments of this application is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution or technical solution of this application is Part of it can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium and includes several instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the various embodiments of this application. All or part of the steps of the method.
  • the storage medium includes at least: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program codes.

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Abstract

La présente invention concerne un procédé de communication et un dispositif de communication. Le procédé comprend les étapes suivantes : une fonction de plan d'utilisateur (UPF) tolérante aux pannes obtient une première adresse de protocole d'interfonctionnement (IP) d'une première UPF ; et l'UPF tolérante aux pannes publie des premières informations de routage de la UPF tolérante aux pannes à un premier réseau de routage, le premier réseau de routage étant un réseau de routage entre un réseau d'accès et un réseau fédérateur, les premières informations de routage correspondant à la première adresse IP, la priorité des premières informations de routage étant inférieures à la priorité de secondes informations de routage, les secondes informations de routage étant des informations de routage en liaison montante de la première UPF, et les secondes informations de routage correspondant à la première adresse IP. Au moyen du procédé selon la présente invention, lorsqu'une défaillance survient dans une UPF et qu'un routage échoue, un dispositif terminal peut transmettre, au moyen d'une commutation de routage, des données en utilisant un routage de basse priorité publié par l'UPF tolérante aux pannes, ce qui évite l'interruption d'une transmission de service, garantissant de cette façon la continuité de la transmission de service.
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CN116390272A (zh) * 2023-04-11 2023-07-04 广州爱浦路网络技术有限公司 5g核心网pfcp-gw实现upf控制的方法、装置以及电子设备
CN116390272B (zh) * 2023-04-11 2024-04-19 广州爱浦路网络技术有限公司 5g核心网pfcp-gw实现upf控制的方法、装置以及电子设备

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