WO2020224618A1 - 一种寻址方法、通信装置及系统 - Google Patents

一种寻址方法、通信装置及系统 Download PDF

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Publication number
WO2020224618A1
WO2020224618A1 PCT/CN2020/089016 CN2020089016W WO2020224618A1 WO 2020224618 A1 WO2020224618 A1 WO 2020224618A1 CN 2020089016 W CN2020089016 W CN 2020089016W WO 2020224618 A1 WO2020224618 A1 WO 2020224618A1
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Prior art keywords
network element
information
terminal device
amf
management function
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PCT/CN2020/089016
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English (en)
French (fr)
Inventor
朱方园
李永翠
李岩
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华为技术有限公司
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Publication of WO2020224618A1 publication Critical patent/WO2020224618A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular to an addressing method, communication device, and system.
  • deploying a mobile edge computing (MEC) platform close to the user's attachment access point can enable operators and third parties to achieve efficient service distribution by reducing delay and load.
  • the session management function (SMF) network elements and the access and mobility management function (access and mobility management function, AMF) network elements are centrally deployed at higher positions in the network.
  • Radio access network (RAN) equipment and user plane function (UPF) network elements are deployed locally.
  • RAN Radio access network
  • UPF user plane function
  • the service request message of the terminal device must first be processed by a control plane network element located at a higher deployment position before establishing a network edge deployment between UPF and RAN.
  • the user plane transmission path and the signaling transmission path are relatively circuitous, which causes a long delay in the service request process of the terminal device.
  • a local control plane network element can be introduced as a local signaling agent near the UPF, so that the control plane signaling is not It needs to be transmitted to AMF and SMF for processing, and the local control plane network element can page the terminal device and process the service request message of the terminal device locally, which greatly reduces the time delay of signaling processing.
  • the RAN does not perceive the presence of local control plane network elements, when the RAN receives non-access stratum (NAS) signaling from the terminal device, the RAN still routes the NAS signaling to the AMF. As a result, the signaling transmission path is relatively circuitous. Therefore, how the RAN routes the NAS signaling of the terminal device to the local control plane is an urgent problem to be solved.
  • NAS non-access stratum
  • the embodiments of the present application provide an addressing method, communication device, and system, which can route NAS signaling of a terminal device to a local control plane network element, avoid excessively circuitous signaling transmission paths, and reduce the delay of the terminal device's local service request process .
  • an addressing method which includes: a wireless access network device sends first information from a terminal device to an access mobility management function network element, where the first information is used to request the establishment of the terminal device Local business sessions.
  • the wireless access network equipment may also receive second information sent by the network element that accesses the mobility management function, the second information includes the first address, and the first address points to the first network element; the wireless access network equipment may also receive the information sent by the terminal device
  • the third information is to send the third information to the first network element according to the first address.
  • the wireless access network device receives the first address sent by the network element that accesses the mobility management function.
  • the wireless access network device when it receives the NAS message (the third information described in the embodiment of the present invention) sent by the terminal device, it can send the terminal device's information to the local control plane network element according to the address of the local control plane network element. NAS news. It can be seen that when establishing the MEC service for the terminal device, the embodiment of the present invention can make the wireless access network device route the NAS message to the local control plane network element through the instruction of the access mobility management function network element, avoiding the transmission path of the NAS message. Detour to reduce the time delay of the terminal device service request process.
  • the first information and the third information are non-access stratum NAS messages sent by the terminal device.
  • the NAS message sent by the terminal device can be routed to the local control plane network element, so as to avoid excessively circuitous signaling transmission paths and reduce the time delay of the local service request process of the terminal device.
  • the terminal device when the terminal device is in the idle state, the terminal device sends the first identifier and the NAS message (that is, the third information described in the embodiment of the present invention) to the wireless access network device. Element association, so that the radio access network device can address the first network element according to the first identifier.
  • sending third information to the first network element according to the first address includes: determining the third information according to the first identifier The addressing address of the information is the first network element, and the third information is sent to the first network element.
  • the radio access network device can determine that the addressing address of the third information is the first network element after receiving the third information and the first identifier sent by the terminal device , And then send the third information to the first network element.
  • the first network element is a local control plane network element.
  • the wireless access network equipment can route the signaling involved in the local service process of the terminal device to the local control plane network element, avoiding too circuitous signaling transmission paths, and reducing the time delay of the terminal device local service request process .
  • an addressing method including: an access mobility management function network element receives first information from a terminal device sent by a wireless access network device; the first information is used to request to establish a local for the terminal device Service session; the access mobility management function network element can determine that the terminal device has established a local service, and send second information to the wireless access network device.
  • the second information includes the first address, and the first address points to the first network element.
  • the access mobility management function network element determines that the terminal device requests the local service, it can send the address of the local control plane network element to the wireless access network device (as described in the first embodiment of the present invention). An address).
  • the wireless access network device receives the NAS message (the third information described in the embodiment of the present invention) sent by the terminal device, it can send the terminal device's information to the local control plane network element according to the address of the local control plane network element. NAS news.
  • the embodiment of the present invention can make the wireless access network device route the NAS message to the local control plane network element through the instruction of the access mobility management function network element, avoiding the transmission path of the NAS message. Detour to reduce the time delay of the terminal device service request process.
  • the access mobility management function network element determines that the terminal device has established a local service, including: receiving a session The instruction information sent by the management function network element is used to instruct the terminal device to establish a local service; according to the instruction information, it is determined that the terminal device has established a local service.
  • the access mobility management function network element determines that the terminal device has established a local service, including: receiving a session The information of the first network element sent by the management function network element determines that the terminal device has established a local service according to the information of the first network element.
  • the first network element is a local control plane network element.
  • an addressing method including: an access mobility management function network element sends a target network element and an information type corresponding to the target network element to a wireless access network device; the access mobility management function network element determines a terminal The device establishes a local service and sends configuration update request information to the terminal device; wherein the configuration update request information is used to instruct the terminal device to send the information type of the first information to the wireless access network device, and the first information is used for the wireless access network device Send the first information to the target network element according to the information type of the first information; where the target network element includes an access mobility management function network element or a local control plane network element.
  • the wireless access network device realizes the correct routing of the NAS message through the instruction of the access mobility management function network element, and reduces the delay of the local service processing of the terminal device, so as to more quickly provide The terminal device establishes a local service.
  • the target network element is an access mobility management function network element, and the information type corresponding to the target network element is the first type. If the target network element is a local For the control plane network element, the information type corresponding to the target network element is the second type.
  • the access mobility management function network element configures the first type of message to be sent to the access mobility management function network element, and the first type of message is configured to need to be sent to the local control plane network element
  • the message allows the wireless access network device to accurately address the message according to the information type.
  • the radio access network equipment routes these messages to the local control plane network element to avoid excessively circuitous signaling transmission paths and reduce the time delay of the terminal device local service request process.
  • the wireless access network equipment can route these messages to the access mobility management function network element without being forwarded by the local control plane network element, which greatly reduces the local The forwarding load of the control plane network element.
  • the first information is a non-access stratum NAS message sent by the terminal device.
  • the session management function network element may send specific indication information to the access mobility management function network element to notify the access mobility management function network element that the terminal device has established the local service ".
  • the access mobility management function network element determines that the terminal device has established a local service, including :
  • the session management function network element may send the information of the local control plane network element to the access mobility management function network element to notify the access mobility management function network element that the terminal device has been established Local business".
  • an addressing method is disclosed.
  • the wireless access network device receives the information of the target network element and the information type corresponding to the target network element sent by the network element that accesses the mobility management function; the wireless access network device receives the information sent by the terminal device According to the information type of the first information and the information type of the first information, the first information is sent to the target network element according to the information type of the first information; the target network element includes an access mobility management function network element or a local control plane network element.
  • the access mobility management function network element (such as AMF) pre-configures the information of the target network element and the information type corresponding to the target network element to the wireless access network equipment, and instructs the terminal device to transfer the NAS message and the NAS
  • the type of the message is sent to the wireless access network device.
  • the wireless access network equipment can correctly route the NAS message according to the NAS message and the information type sent by the terminal device.
  • the terminal device requests a local service
  • the NAS message of the terminal device can be processed by the local control plane network element to establish a local service for the terminal device.
  • the wireless access network device realizes the correct routing of the NAS message through the instruction of the access mobility management function network element, and reduces the delay of the local service processing of the terminal device, so as to more quickly provide The terminal device establishes a local service.
  • the target network element is an access mobility management function network element, and the information type corresponding to the target network element corresponds to the message of the first type. If the element is a local control plane network element, the information type corresponding to the target network element is the second type.
  • the radio access network device sends the first information to the target network element according to the information type of the first information.
  • the information specifically includes: determining the target network element according to the information type corresponding to the target network element.
  • the first information is a non-access stratum NAS message sent by the terminal device.
  • an addressing method including:
  • the terminal device receives the configuration update request information sent by the access mobility management function network element; the configuration update request information is used to instruct the terminal device to send the information type of the first information to the wireless access network device;
  • the terminal device sends the first information and the information type of the first information to the wireless access network device, so that the wireless access network device sends the first information to the target network element according to the information type of the first information;
  • the target network element includes access mobility management Functional network element or local control plane network element.
  • the first information is a non-access stratum NAS message sent by the terminal device.
  • the access mobility management function network element is used to receive the first information from the terminal device sent by the wireless access network equipment, determine that the terminal device has established a local service, and send the second information to the wireless access network equipment.
  • the information includes a first address, the first address points to the first network element; the first information is used to request the establishment of a local service session for the terminal device; the wireless access network device is used to send the first address to the network element that accesses the mobility management function One message, receiving the second information sent by the network element that accesses the mobility management function, receiving the third information sent by the terminal device, and sending the third information to the first network element according to the first address;
  • the access mobility management function network element is used to send the target network element information and the information type corresponding to the target network element to the wireless access network equipment, determine that the terminal device has established a local service, and send configuration update request information to the terminal device; configuration update The request information is used to instruct the terminal device to send the information type of the first information to the wireless access network device, and the type of the first information is used for the wireless access network device to send the first information to the target network element according to the information type of the first information;
  • the target network element includes the access mobility management function network element or the local control plane network element; the wireless access network equipment is used to receive the target network element information sent by the access mobility management function network element and the information type corresponding to the target network element , Receiving the first information and the information type of the first information sent by the terminal device, and sending the first information to the target network element according to the information type of the first information.
  • an access mobility management function network element including: a communication unit, configured to send first information from a terminal device to the access mobility management function network element, where the first information is used to request information
  • the terminal device establishes a local service session.
  • the communication unit is further configured to receive second information sent by a network element that accesses the mobility management function, where the second information includes a first address, and the first address points to the first network element; the communication unit is also configured to receive a third message sent by the terminal device. Information, sending the third information to the first network element according to the first address.
  • the first information and the third information are non-access stratum NAS messages sent by the terminal device.
  • the communication unit is further configured to receive the first identifier sent by the terminal device, and the first identifier and The first network element is associated.
  • the processing unit further includes a processing unit configured to determine, according to the first identifier, that the addressing address of the third information is The first network element sends the third information to the first network element.
  • the first network element is a local control plane network element.
  • an access mobility management function network element including: a communication unit, configured to receive first information from a terminal device sent by a wireless access network device; and the first information is used to request information for the terminal device Establish a local service session; the processing unit is used to determine that the terminal device has established a local service; the communication unit is also used to send second information to the wireless access network device, the second information includes the first address, and the first address points to the first Network element.
  • the first information is a non-access stratum NAS message sent by the terminal device.
  • the communication unit is further configured to receive the instruction information sent by the session management function network element, the instruction information It is used to instruct the terminal device to establish a local service; the processing unit is specifically configured to determine that the terminal device has established a local service according to the instruction information.
  • the communication unit is further configured to receive the information of the first network element sent by the session management function network element Information; the processing unit is specifically configured to determine, according to the information of the first network element, that the terminal device has established a local service.
  • the communication unit is further configured to send the first to the terminal device An identifier, the first identifier is associated with the first network element.
  • the first network element is a local control plane network element.
  • an access mobility management function network element including: a communication unit, configured to send information of a target network element and a type of information corresponding to the target network element to a wireless access network device; and a processing unit for It is determined that the terminal device has established a local service, and the configuration update request information is sent to the terminal device; wherein the configuration update request information is used to indicate the information type of the terminal device to send the first information to the wireless access network device, and the first information is used for wireless access
  • the network device sends the first information to the target network element according to the information type of the first information; where the target network element includes an access mobility management function network element or a local control plane network element.
  • the target network element is an access mobility management function network element, and the information type corresponding to the target network element is the first type, and the target network element is local control If it is a plane network element, the information type corresponding to the target network element is the second type.
  • the first information is a non-access stratum NAS message sent by the terminal device.
  • the communication unit is further configured to receive the instruction information sent by the session management function network element
  • the processing unit is specifically configured to determine, according to the instruction information, that the terminal device has established a local service; the instruction information is used to instruct the terminal device to establish a local service.
  • the communication unit is further configured to receive the local control sent by the session management function network element Information of the plane network element; the processing unit is specifically configured to determine that the terminal device has established a local service according to the information of the local control plane network element.
  • a wireless access network device including: a communication unit, configured to receive information about a target network element and a type of information corresponding to the target network element sent by a mobile management function network element, and receive information from a terminal device The first information and the information type of the first information; the communication unit is further configured to send the first information to the target network element according to the information type of the first information; the target network element includes an access mobility management function network element or a local control plane network element .
  • the target network element is an access mobility management function network element, and the information type corresponding to the target network element is the first type, and the target network element is local control If it is a plane network element, the information type corresponding to the target network element is the second type.
  • the processing unit further includes a processing unit, and the processing unit is specifically configured to: The corresponding information type determines the target network element.
  • the first information is a non-access stratum NAS message sent by the terminal device.
  • a wireless access network device including a memory, a processor, and a program stored in the memory and running on the processor.
  • the processor implements the first aspect and any of the first aspect when the program is executed.
  • One possible implementation, the second and any possible implementations of the second aspect, the third and any possible implementations of the third aspect, and any one of the fourth and fourth aspects The addressing method described in the mode.
  • a network element with access to mobility management functions which includes a memory, a processor, and a program stored in the memory and running on the processor.
  • the processor implements the first aspect and the first aspect when the program is executed.
  • a terminal device including a memory, a processor, and a program stored in the memory and capable of running on the processor.
  • the processor executes the program, any one of the first aspect and the first aspect may be implemented.
  • the implementation of the second aspect and any possible implementation of the second aspect, the third and any possible implementation of the third aspect, and the fourth and the fourth aspect of any possible implementation The addressing method.
  • a computer-readable storage medium including instructions, which when run on a computer, cause the computer to execute the foregoing first aspect, any one of the possible implementation manners of the first aspect, and the second aspect And the addressing method described in any possible implementation manner of the second aspect, any possible implementation manner of the third aspect and the third aspect, and any possible implementation manner of the fourth aspect and the fourth aspect.
  • a computer program product including instructions, which when run on a computer, cause the computer to execute the first aspect and any one of the possible implementations of the first aspect, the second aspect, and the second aspect.
  • a wireless communication device including: instructions stored in the wireless communication device; when the wireless communication device runs on the device described in the sixth aspect to the eighth aspect, the device is caused to perform the implementation as described above.
  • FIG. 1 is an architecture diagram of a communication system provided by an embodiment of the present invention
  • Figure 2 is another architecture diagram of a communication system provided by an embodiment of the present invention.
  • Figure 3 is a framework diagram of a communication device provided by an embodiment of the present invention.
  • FIG. 4 is an architecture diagram of AMF networking provided by an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of an addressing method provided by an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of another process of an addressing method provided by an embodiment of the present invention.
  • FIG. 7 is another schematic flowchart of an addressing method provided by an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of interaction between network elements according to an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of a configuration method provided by an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of another process of an addressing method provided by an embodiment of the present invention.
  • FIG. 11 is another schematic flowchart of an addressing method provided by an embodiment of the present invention.
  • FIG. 12 is a schematic flowchart of another addressing method according to an embodiment of the present invention.
  • FIG. 13 is another schematic flowchart of an addressing method provided by an embodiment of the present invention.
  • 15 is a schematic diagram of another process of an addressing method provided by an embodiment of the present invention.
  • FIG. 16 is another framework diagram of a communication device provided by an embodiment of the present invention.
  • FIG. 17 is another framework diagram of a communication device provided by an embodiment of the present invention.
  • the embodiment of the present invention provides a communication system.
  • the communication system includes a terminal device, a radio access network (RAN), a user plane function (UPF), and a connection Into the mobility management function (AMF) network element, the session management function (session management function, SMF) network element, and the local control plane network element.
  • the control plane is separated from the user plane, SMF can be deployed on the control plane, and UPF can be flexibly deployed on the user plane, that is, sinking and deploying to the edge of the network.
  • the local control plane network element is introduced as a local signaling agent near the UPF, and the local control plane network element stores the mobility management (MM) context and session management (SM) context of some terminal devices, which can be executed The local paging of the terminal device, the service request flow of the terminal device.
  • MM mobility management
  • SM session management
  • the local paging of the terminal device the service request flow of the terminal device.
  • open the local capabilities of the local control plane network elements such as performing functions such as positioning services.
  • RAN used to implement wireless-related functions; for example, RAN network elements include but are not limited to eNodeB, wireless fidelity (Wi-Fi) access points, and worldwide interoperability for microwave access (WiMAX) Base station, etc.
  • RAN network elements include but are not limited to eNodeB, wireless fidelity (Wi-Fi) access points, and worldwide interoperability for microwave access (WiMAX) Base station, etc.
  • AMF responsible for user mobility management, including mobility status management, allocation of temporary user identification, authentication and authorization of users.
  • SMF Used for functions related to session management, responsible for UP network element selection, UP network element reselection, network protocol (internet protocol, IP) address allocation, bearer establishment, bearer modification, bearer release, quality of service service, QoS), control.
  • IP internet protocol
  • Local control plane network elements Multiple local control plane network elements with the same function can be deployed in the communication network.
  • the local control plane network element can be an independent network element with the functions of mobility management and session management.
  • the local control plane network element receives the security context and mobility management context of the terminal device from the AMF, and the session context related to the local service from the SMF.
  • the local control plane network element is responsible for local paging and processes the service request of the terminal device locally, and User plane activation of local services and establishment of radio bearers.
  • UPF It can establish a link connection with SMF and accept the management of SMF.
  • the user plane bearer can be established under the management of SMF, and the routing and forwarding of user plane data can be completed, such as establishing a channel with the terminal (that is, the user plane transmission path), and forwarding the terminal and the data network on the channel , DN) data packets; and responsible for the terminal's data message filtering, data transmission/forwarding, rate control, generating billing information, etc.
  • Terminal device or terminal device can be user equipment (UE), access terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal, mobile equipment, UE terminal, wireless communication equipment, UE Agent or UE device, etc.
  • the access terminal can 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, processing devices, in-vehicle devices, wearable devices, terminals in 5G networks or terminals in the future evolved public land mobile network (PLMN) network, etc.
  • the terminal device may also be a device, such as a terminal device, and the terminal device may also be a chip.
  • the RAN does not perceive the existence of the local control plane network element, and the network element connected to the RAN is the AMF network element.
  • the interface between the RAN and the local control plane network element may be called an N2' interface.
  • the N2' interface is mainly used to process mobility management (MM) processes.
  • MM mobility management
  • the RAN forwards the service request message of the terminal device to the local control plane network element, or the local control plane network element can also pass the N2' interface to the RAN Send paging messages, etc.
  • the local control plane network element and AMF are not functionally distinguished.
  • the interface between RAN and AMF is the N2 interface.
  • the N2 interface is mainly used for the local control plane network element to receive the MM context and security context from the AMF. It should be noted that if the local control plane network element cannot process some signaling from the RAN, the signaling is forwarded to the AMF and processed by the AMF.
  • the interface between the local control plane network element and the UPF is the N4 interface.
  • the N4 interface is mainly used to exchange the session information of the local service between the local control plane network element and the UPF.
  • the local control plane network element processes the downlink data notification message of the local service from the UPF.
  • the local control plane network element and SMF are not functionally distinguished.
  • the interface between the local control plane network element and the SMF is the N4' interface.
  • the N4' interface is mainly used for the local control plane network element to receive the SM context of the local session from the SMF. It should be noted that if the local control plane network element cannot process some signaling from the UPF, the signaling is forwarded to the SMF and processed by the SMF.
  • the local control plane network elements can be further divided into local AMF and local SMF functionally.
  • local AMF is a mobility management network element that is deployed closer to UPF or RAN.
  • Local AMF receives the security context and mobility management context of the terminal device from the AMF, and is responsible for local paging and local Handle service requests from terminal devices.
  • local SMF is a session management function network element that is deployed closer to UPF or RAN.
  • Local SMF receives session context related to local services from SMF.
  • Local SMF is responsible for session management of local services, for example, local services
  • the user plane is activated and the radio bearer is established.
  • the local control plane network element described in the embodiment of the present invention may also be the local AMF in Figure 2, that is, the local control plane network element is only responsible for the function of mobility management, while the function of session management is determined by the local SMF. Be responsible for.
  • the interface between RAN and AMF is the aforementioned N2 interface
  • the interface between RAN and local AMF is the aforementioned N2' interface.
  • the first type is that for all NAS signaling of the terminal device, the RAN will send it to the local control plane network element. If the NAS signaling requires AMF processing, the local control plane network element transparently transmits the NAS signaling to the AMF for processing by the AMF. If the terminal device requests the establishment of a local service through the NAS signaling, the local control plane network element processes the NAS signaling by itself and does not need to forward it to the AMF.
  • the NAS message must first be routed to the local control plane network element, which brings forwarding load to the local control plane network element.
  • the RAN initially routes the NAS signaling to the AMF by default. If the terminal device requests a local service, and the NAS signaling of the terminal device needs to be processed by the local control plane network element, the RAN needs to forward the NAS message to the local control plane network element.
  • the RAN does not distinguish between local control plane network elements and AMF functionally, that is, the RAN does not perceive the existence of the local control plane network elements, and the RAN cannot correctly address the NAS message after receiving the NAS message from the terminal device.
  • the NAS signaling takes the service request message related to the MEC service as an example.
  • the RAN cannot determine whether the NAS signaling is routed to the AMF or the local control plane network element. Make it route to AMF, and then AMF will pass the processed signaling to SMF network element, triggering SMF to establish a user plane transmission path between UPF and RAN, which will lead to too circuitous signaling transmission path and long service request process delay .
  • an access mobility management function network element receives first information from a terminal device sent by a wireless access network device; the first information is used to request the terminal The device establishes a local service session. Furthermore, the access mobility management function network element may determine that the terminal device has established a local service, and send second information to the wireless access network device, where the second information includes a first address, and the first address points to The first network element. In the method provided by the embodiment of the present invention, after the access mobility management function network element determines that the terminal device requests a local service, it can send the address of the local control plane network element (such as the first address in the embodiment of the present invention) to the RAN.
  • the access mobility management function network element receives first information from a terminal device sent by a wireless access network device; the first information is used to request the terminal The device establishes a local service session. Furthermore, the access mobility management function network element may determine that the terminal device has established a local service, and send second information to the wireless access network device, where the second information includes a first address, and the
  • the RAN when the RAN receives the NAS message (the third information described in the embodiment of the present invention) sent by the terminal device, it can send the NAS message of the terminal device to the local control plane network element according to the address of the local control plane network element. It can be seen that when establishing the MEC service for the terminal device, the embodiment of the present invention can make the wireless access network device route the NAS message to the local control plane network element through the instruction of the access mobility management function network element, avoiding the transmission path of the NAS message. Detour to reduce the time delay of the terminal device service request process.
  • FIG. 3 is a schematic diagram of the hardware structure of the communication device 30 provided by an embodiment of the application.
  • the communication device 30 includes a processor 301, a communication line 302, a memory 303, and at least one communication interface (in FIG. 3, it is only exemplary and the communication interface 304 is included as an example for illustration).
  • the processor 301 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the execution of the program of this application. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the communication line 302 may include a path to transmit information between the aforementioned components.
  • Communication interface 304 using any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .
  • RAN radio access network
  • WLAN wireless local area networks
  • the memory 303 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions
  • the dynamic storage device can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this.
  • the memory can exist independently and is connected to the processor through the communication line 302. The memory can also be integrated with the processor.
  • the memory 303 is used to store computer-executed instructions for executing the solution of the present application, and the processor 301 controls the execution.
  • the processor 301 is configured to execute computer-executable instructions stored in the memory 303, so as to implement the intention processing method provided in the following embodiments of the present application.
  • the computer-executable instructions in the embodiments of the present application may also be referred to as application program code, which is not specifically limited in the embodiments of the present application.
  • the processor 301 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 3.
  • the communication device 30 may include multiple processors, such as the processor 301 and the processor 308 in FIG. 3. Each of these processors can be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor.
  • the processor here may refer to one or more devices, circuits, and/or processing cores for processing data (for example, computer program instructions).
  • the communication apparatus 30 may further include an output device 305 and an input device 306.
  • the output device 305 communicates with the processor 301 and can display information in a variety of ways.
  • the output device 305 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait.
  • the input device 306 communicates with the processor 301 and can receive user input in a variety of ways.
  • the input device 306 may be a mouse, a keyboard, a touch screen device, or a sensor device.
  • the aforementioned communication device 30 may be a general-purpose device or a dedicated device.
  • the communication device 30 can be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or a device with a similar structure in FIG. 3 equipment.
  • PDA personal digital assistant
  • the embodiment of the present application does not limit the type of the communication device 30.
  • the processor 301 of the communication device 30 runs or executes a software program and/or module stored in the memory 303, And call the data stored in the memory 303 to perform the following functions:
  • the first information from the terminal device is sent to the access mobility management function network element; the first information is used to request the establishment of a local service session for the terminal device.
  • receiving second information sent by the access mobility management function network element where the second information includes a first address, and the first address points to the first network element.
  • the radio access network device may also receive the third information sent by the terminal device, and send the third information to the first network element according to the first address.
  • the target network element includes the access mobility management function network element or the local control plane network element.
  • the processor 301 runs or executes the software program and/or module stored in the memory 303, and calls The data stored in the memory 303 performs the following functions:
  • the network element supporting the access mobility management function sends the information of the target network element and the information type corresponding to the target network element to the wireless access network device.
  • the access mobility management function network element determines that the terminal device has established a local service
  • the access mobility management function network element supports sending configuration update request information to the terminal device.
  • the configuration update request information is used to instruct the terminal device to send the information type of the first information to the wireless access network device, and the first information is used by the wireless access network device to send the information to the target according to the information type of the first information.
  • the network element sends the first information; wherein, the target network element includes the access mobility management function network element or the local control plane network element.
  • 5G Globally Unique Temporary UE Identity 5G-GUTI
  • 5G-GUTI includes GUAMI, (5G-TMSI).
  • GUAMI GUAMI
  • 5G-TMSI globally unique AMF identifier
  • the identification may include a mobile country code (mobile country code, MCC), mobile network code (mobile network code, MNC), AMF Region ID, AMF Set ID, and AMF pointer.
  • MCC It can be 3 digits, such as China's MCC is 460.
  • AMF Region ID Used to identify the AMF Region. Among them, the AMF Region consists of one or more AMF Sets. AMF Region ID.
  • AMF Set ID Used to uniquely identify an AMF set in the AMF Region.
  • the AMF Set is composed of multiple AMFs, and these AMFs serve a specific area and network slice.
  • one AMF Region may include multiple AMF sets, and one AMF set (set) may include multiple AMFs.
  • the RAN can have an N2 interface with any AMF in each AMF Region, and communicate through the N2 interface.
  • FIG 4 is an example of AMF networking.
  • an AMF Region includes two AMF sets, namely AMF set-1 and AMF set-2.
  • AMF set-1 includes two AMFs, namely AMF-1 and AMF-2.
  • AMF set-2 includes two AMF network elements, AMF-3 and AMF-4.
  • RAN-1 can communicate with any AMF in AMF set-1 and AMF set-2 through the N2 interface;
  • RAN-2 can communicate with any AMF in AMF set-1 and AMF set-2.
  • N2 interface for communication for communication.
  • GUAMI-1 ⁇ MCC> ⁇ MNC> ⁇ AMFRegionID> ⁇ AMFSetID> ⁇ AMFPointer-1>;
  • GUAMI-2 ⁇ MCC> ⁇ MNC> ⁇ AMFRegionID> ⁇ AMFSetID> ⁇ AMFPointer-2>;
  • GUAMI-1 and GUAMI-2 are different identifiers, but if the AMF Pointer-1 contained in GUAMI-1 and the AMF Pointer-2 contained in GUAMI-2 both point to the same AMF, then GUAMI-1, GUAMI- 2 also points to the same AMF. That is, GUAMI-1 and GUAMI-2 can be used to identify the same AMF.
  • TNL association is used to establish a device-level link between AMF and RAN or a UE-granularity Next Generation Application Protocol (NGAP) link.
  • the device-level connection refers to the transmission of data irrelevant to the UE on a certain TNL association on the N2 interface between the AMF and the RAN, such as AMF capability parameters or RAN capability parameters.
  • the UE-granular NGAP link transfers UE-specific parameters on a TNL association on the N2 interface between the AMF and RAN, that is, binds the UE's NGAP link with a TNL association (NGAP UE-TNLA-binding).
  • the NGAP links of different UEs can be bound to the same TNL association, or to different TNL associations.
  • the AMF can update the NGAP UE-TNLA-binding by updating the TNL association bound to the NGAP link of the UE.
  • the NGAP UE-TNLA-binding-1 stored on the AMF includes the binding relationship between the UE's NGAP link and TNL association-1. If the AMF updates the UE's NGAP link and TNL association-1 binding to the UE's NGAP If the link is bound to TNL association-2, then the NGAP UE-TNLA-binding-1 stored in AMF is updated to NGAP UE-TNLA-binding-2.
  • NGAP UE-TNLA-binding-2 includes the UE’s NGAP link and TNL association- 2 Binding relationship.
  • the RAN will assign a RAN UE NGAP ID to the UE.
  • the RAN UE NGAP ID is used by the RAN to uniquely identify a UE on the N2 interface, and the AMF will be the UE.
  • the AMF UE NGAP ID is allocated, where the AMF UE NGAP ID is used for the AMF to uniquely identify a UE on the N2 interface.
  • AMF and RAN can pass network element equipment granularity parameters or network capabilities through a certain TNL association, or AMF and RAN can pass UE granularity parameters through a certain TNL association.
  • TNL association and GUAMI have a corresponding relationship.
  • the TNL association corresponding to GUAMI-1 is: TNL association Address-1
  • the TNL association corresponding to GUAMI-2 is: TNL association Address-2.
  • TNL Association Address-1 and TNL Association Address-2 are both address information that can point to the same AMF.
  • the embodiment of the present invention provides an addressing method. As shown in FIG. 5, the method includes the following steps:
  • a terminal device sends first information to a wireless access network device, where the first information is used to request the establishment of a local service session for the terminal device.
  • the terminal device when the terminal device requests to establish a service, the terminal device may send a NAS message to the wireless access network device to request the establishment of a local service session for the terminal device. For example, the terminal device sends the first information to the wireless access network device, requesting to establish a local service session for the terminal device.
  • the first information may be information carried in a session establishment request message, and the session establishment request message is used to request the core network to establish a protocol data unit (PDU) session of a local service for the terminal device. That is, the PDU session established by the first information request is associated with the local service.
  • PDU protocol data unit
  • local services described in the embodiments of the present invention can be understood as MEC services, local area data network (LADN) services, or services that can be processed locally by local control plane network elements, for example, local paging services , User plane activation of local service, establishment of local service radio bearer.
  • LADN local area data network
  • the radio access network device sends the first information to the access mobility management function network element.
  • the wireless access network device cannot determine whether the terminal is requesting a local service, and therefore cannot determine whether to route the first information to the local control plane network element or access the mobility management function network element, and will default to the terminal The first information of the device is routed to the access mobility management function network element.
  • the radio access network device may send the first information to the access mobility management function network element through the N2 interface with the access mobility management function network element.
  • the access mobility management function network element receives the first information, and determines that the terminal device has established a local service.
  • the local service described in the embodiment of the present invention may be an MEC service.
  • the access mobility management function network element receives the first information from the terminal device, it can determine whether the terminal device has established a local service. If the terminal device has established a local service, and the subsequent terminal device is in a connected state, it can send a NAS message to the wireless access network device to request the establishment of the local service. Furthermore, the access mobility management function network element can instruct the wireless access network equipment to route the NAS message subsequently sent by the terminal device to the local control plane network element, reducing the delay of local service processing of the terminal device, so as to provide the terminal device more quickly. The device establishes a local business.
  • the network element accessing the mobility management function can determine that the terminal device has established a local service in the following two ways:
  • the session management function network element determines that the terminal device has established a local service, it can notify the access mobility management function network element through indication information that the terminal device device has established the local service.
  • the access mobility management function network element receives the session establishment request message sent by the terminal device from the wireless access network device, it forwards the session establishment request message to the session management function network element.
  • the session management function network element can be based on the data network name (DNN) carried in the session establishment request message, the single network slice selection assistance information (S-NSSAI), and the current location of the terminal device. Parameters such as location information determine that the PDU session requested by the session establishment request message is associated with the local service, and it can also be determined that the terminal device has established the local service.
  • the session management function network element may send instruction information to the access mobility management function network element for indicating that "the terminal device has established a local service".
  • the access mobility management function network element receives the indication information sent by the session management function network element, where the indication information is used to indicate that the terminal device has established a local service. Furthermore, the access mobility management function network element determines, according to the indication information, that the terminal device has established a local service.
  • the session management network element may send specific indication information to the access mobility management function network element to indicate access to the mobility management function network element, and the terminal device has been established Local business.
  • the indication information may be pre-appointed by the network element of the session management function and the network element of the access mobility management function.
  • the pre-appointed indication information is "0100" when the session management function network element sends "0100" to the access mobility management function network element, the access mobility management function network element can determine that the terminal device has established a local service.
  • the session management function network element determines that the terminal device has established a local service, it can send the local control plane network element information to the access mobility management function network element to indicate that the access mobility management function network element terminal device equipment has been established Local business.
  • the access mobility management function network element receives the session establishment request message sent by the terminal device from the wireless access network device, it forwards the session establishment request message to the session management function network element.
  • the session management function network element may determine that the PDU session requested to be established by the session establishment request message is associated with the local service according to parameters such as DNN, S-NSSAI, and current location information of the terminal device carried in the session establishment request message. Further, the session management function network element selects a local control plane network element and sends the information of the first network element to the access mobility management function network element; wherein the first network element may be a local control plane network element to indicate " The terminal device has established a local service".
  • the access mobility management function network element receives the information of the first network element sent by the session management function network element, and determines that the terminal device has established a local service according to the information of the first network element.
  • the information of the first network element may be the identification of the first network element, for example, the information of the first network element is the identification information of the local control plane network element.
  • the session management function network element may also request a network storage function (network repository function, NRF)
  • NRF network repository function
  • the network element requests the information of the local control plane network element, and transmits the information of the local control plane network element returned by the NRF to the access mobility management function network element, and instructs the access mobility management through the "local network element information"
  • the functional network element terminal device has established a local service.
  • the access mobility management function network element sends second information to the radio access network device, where the second information includes a first address, and the first address points to the first network element.
  • the first address may be an address of a local control plane network element.
  • the access mobility management function network element determines that the terminal device has established a local service, it can send the address of the local control plane network element to the wireless access network device to instruct the wireless access network device to route the NAS message subsequently sent by the terminal device to the local
  • the control plane network element reduces the time delay of the local service processing of the terminal device, so as to establish the local service for the terminal device more quickly.
  • the second information is used to instruct the wireless access network device to route the third information sent by the terminal device after the first information to the local control plane network element.
  • the second information sent by the access mobility management function network element to the radio access network device may be the information carried in the N2 request message, which triggers the radio access network device to perform redirection, that is, update the UE granularity The binding relationship between NGAP link and TNL association (NGAP UE-TNLA-binding).
  • the second information carries the TNL association corresponding to the terminal device, and the TNL association corresponds to the address information of the first network element.
  • the second information may include address information of the local control plane network element, and the radio access network device may update the NGAP UE-TNLA-binding according to the address information of the local control plane network element.
  • the wireless access network device receives the third information sent by the terminal device, and sends the third information to the first network element.
  • the radio access network device may determine to send the third information to the first network element.
  • the NAS message When the terminal device sends a NAS message to the wireless access network device again, the NAS message carries the third information.
  • the third information can have the same function as the first information, and both are used to request the establishment of a local service session for the terminal device. .
  • the wireless access network device may send the third information to the first network element according to the first address.
  • the access mobility management function network element can instruct the wireless access network device to route the NAS message subsequently sent by the terminal device to the local control plane network element, reducing the locality of the terminal device. The delay of service processing in order to establish local service for the terminal device more quickly.
  • the method shown in Figure 5 further includes: after the radio access network device receives the second information sent by the access mobility management function network element, it can also modify NGAP UE-TNLA-binding to redirect the radio access network device NAS messages provide the basis.
  • the TNL association corresponding to GUAMI-1 is Address-1; the TNL association corresponding to GUAMI-2 is Address-2; among them, Address-1 and Address-2 both point to the access mobility management function network element.
  • the TNL association corresponding to GUAMI-1 is: Address-1; the TNL association corresponding to GUAMI-2 is: Address-3; among them, Address-1 points to the access mobility management function network element, and Address-3 can be the local control plane
  • Address-1 points to the access mobility management function network element, and Address-3 can be the local control plane
  • Address-3 can be the local control plane
  • the address information of the network element points to the local control plane.
  • the radio access network device may also save the modified corresponding relationship in the context of the terminal device. Subsequently, if the terminal device is in the connected state, when the wireless access network device receives the terminal device NAS message, it will address the local control plane according to the corresponding address in the context.
  • the method shown in FIG. 5 further includes: the access mobility management function network element may also send a GUAMI list to the wireless access network device to implement the wireless access network device to find the NAS message sent by the terminal device in the idle state. site.
  • the GUAMI list supported by AMF includes GUAMI-1 and GUAMI-2.
  • GUAMI-1 ⁇ MCC> ⁇ MNC> ⁇ AMFRegionID> ⁇ AMFSetID> ⁇ AMFPointer-1>
  • GUAMI-2 ⁇ MCC> ⁇ MNC> ⁇ AMFRegionID> ⁇ AMFSetID> ⁇ AMF Pointer-2>.
  • AMF Pointer included in GUAMI-1 and GUAMI-2 is different, where AMF Pointer-1 points to the first network element, that is, is associated with the first network element, and the first network element may be a local control network element; AMF Pointer-2 points to the second network element, and the second network element may be AMF.
  • the access mobility management function network element sends the first identifier to the terminal device, and when the terminal device is in an idle state, sends the NAS message and the first identifier to the wireless access network equipment, the wireless access network equipment
  • the NAS message from the terminal device may be sent to the first network element associated with the first identifier according to the first identifier.
  • the embodiment of the present invention provides an addressing method. As shown in FIG. 6, the method includes the following steps:
  • the access mobility management function network element sends the target network element information and the information type corresponding to the target network element to the wireless access network device.
  • the target network element when the target network element is the access mobility management function network element, the information type corresponding to the target network element is the first type; when the target network element is the local control plane network element, the information type corresponding to the target network element is The second type.
  • the NAS message of the terminal device needs to be routed to the remote access mobility management function network element and processed by the access mobility management function network element, the NAS message is the first type of message; if the terminal device requests it It is a local service, and the NAS message of the terminal device needs to be routed to the local control plane network element for processing, and the NAS message is the second type of message.
  • the access mobility management function network element may send the GUAMI list supported by the access mobility management function network element to the radio access network device before step 601.
  • the GUAMI list includes GUAMI-1.
  • the access mobility management function network element may send the corresponding relationship between GUAMI and TNL association to the radio access network device. For example, if the information type is the first type, the TNL association corresponding to GUAMI-1 is address-1; if the information type is the second type, then the TNL association corresponding to GUAMI-1 is address-2.
  • address-1 can be the address information of the access mobility management function network element, pointing to the access mobility management function network element; address-2 can be the address information of the local control plane network element, pointing to the local control plane network element.
  • the radio access network device receives the information of the target network element and the information type corresponding to the target network element sent by the network element that accesses the mobility management function.
  • the radio access network device may receive the target network element information and the information type corresponding to the target network element sent by the access mobility management function network element through the N2 interface between the access mobility management function network element.
  • the access mobility management function network element determines that the terminal device has established a local service, and sends configuration update request information to the terminal device; the configuration update request information is used to instruct the terminal device to send to the wireless access network device The information type of the first information.
  • the first information may be information carried in a NAS message sent by the terminal device.
  • the network element accessing the mobility management function can determine that the terminal device has established a local service in the following two ways:
  • the session management function network element determines that the terminal device has established a local service, it can notify the access mobility management function network element through indication information that the terminal device device has established the local service.
  • the access mobility management function network element receives the session establishment request message sent by the terminal device from the wireless access network device, it forwards the session establishment request message to the session management function network element.
  • the session management function network element can be based on the data network name (DNN) carried in the session establishment request message, the single network slice selection assistance information (S-NSSAI), and the current location of the terminal device. Parameters such as location information determine that the PDU session requested by the session establishment request message is associated with the local service, and it can also be determined that the terminal device has established the local service.
  • the session management function network element may send instruction information to the access mobility management function network element for indicating that "the terminal device has established a local service".
  • the access mobility management function network element receives the indication information sent by the session management function network element, where the indication information is used to indicate that the terminal device has established a local service. Furthermore, the access mobility management function network element determines, according to the indication information, that the terminal device has established a local service.
  • the session management network element may send specific indication information to the access mobility management function network element to indicate access to the mobility management function network element, and the terminal device has been established Local business.
  • the indication information may be pre-appointed by the network element of the session management function and the network element of the access mobility management function.
  • the pre-appointed indication information is "0100" when the session management function network element sends "0100" to the access mobility management function network element, the access mobility management function network element can determine that the terminal device has established a local service.
  • the session management function network element determines that the terminal device has established a local service, it can send the local control plane network element information to the access mobility management function network element to indicate that the access mobility management function network element terminal device equipment has been established Local business.
  • the access mobility management function network element receives the session establishment request message sent by the terminal device from the wireless access network device, it forwards the session establishment request message to the session management function network element.
  • the session management function network element may determine that the PDU session requested to be established by the session establishment request message is associated with the local service according to parameters such as DNN, S-NSSAI, and current location information of the terminal device carried in the session establishment request message. Further, the session management function network element selects a local control plane network element and sends the information of the first network element to the access mobility management function network element; wherein the first network element may be a local control plane network element to indicate " The terminal device has established a local service".
  • the access mobility management function network element receives the information of the first network element sent by the session management function network element, and determines that the terminal device has established a local service according to the information of the first network element.
  • the information of the first network element may be the identification of the first network element, for example, the information of the first network element is the identification information of the local control plane network element.
  • the session management function network element may determine, according to other parameters, that what the terminal device requests through the first information is a local service.
  • the session management function network element can also request the information of the local control plane network element from the network repository function (NRF) network element, and transfer the information of the local control plane network element returned by the NRF to the access mobility management function network element , Indicating that the terminal device of the network element accessing the mobility management function has established a local service.
  • NRF network repository function
  • the terminal device sends the first information and the information type of the first information to the wireless access network device.
  • the terminal device may send the information type of the first information to the radio access network device through a radio resource control (radio resource control, RRC) message.
  • RRC radio resource control
  • the radio access network device receives the first information sent by the terminal device and the information type of the first information, and sends the first information to the target network element according to the information type of the first information.
  • the target network element includes the access mobility management function network element or the local control plane network element.
  • the radio access network device may determine the target network element according to the information type corresponding to the target network element. For example, the first information is a first type of message, the radio access network device may send the first information to the access mobility management function network element, the first information is a second type of message, and the radio access network device The first information may be sent to the local control plane network element.
  • the access mobility management function network element (such as AMF) pre-configures the target network element information and the information type corresponding to the target network element to the wireless access network equipment, and instructs the terminal device to send the NAS message and the NAS
  • the type of the message is sent to the wireless access network device.
  • the wireless access network equipment can correctly route the NAS message according to the NAS message and the information type sent by the terminal device.
  • the terminal device requests a local service
  • the NAS message of the terminal device can be processed by the local control plane network element to establish a local service for the terminal device.
  • the wireless access network device realizes the correct routing of the NAS message through the instruction of the access mobility management function network element, and reduces the delay of the local service processing of the terminal device, so as to more quickly provide The terminal device establishes a local service.
  • the embodiment of the present invention also provides an addressing method, which is applied in the communication system shown in FIG. 1 and can realize the correct routing of the NAS message of the terminal device.
  • the terminal device is UE
  • the radio access network equipment is RAN
  • the access mobility management function network element is AMF
  • the session management function network element is SMF.
  • the method includes the following steps:
  • the AMF configures the correspondence between GUAMI and TNL association to the RAN.
  • the GUAMI supported by AMF can point to the local control plane network element.
  • AMF can support multiple pointers, which means multiple GUAMIs. Multiple GUAMIs can point to AMF and local control plane network elements respectively.
  • AMF supports GUAMI-1 and GUAMI-2.
  • GUAMI-1 includes Pointer-1
  • the TNL association corresponding to GUAMI-1 can be the address information of AMF, that is, GUAMI-1 is associated with AMF.
  • GUAMI-2 includes Pointer-2.
  • the TNL association corresponding to GUAMI-2 can be the address information of the local control plane network element, that is, GUAMI-2 is associated with the local control plane network element.
  • RAN-1 belongs to the service range of the local control plane network element, that is, RAN-1 can interact with the AMF through the N2 interface, or interact with the local control plane network element through the N2' interface.
  • the service range of the local control plane network element is limited, and RAN-2 does not belong to the service range of the local control plane network element. Therefore, RAN-2 can only interact with AMF through the N2 interface.
  • the AMF can refer to the process shown in FIG. 9 to configure the correspondence between GUAMI and TNL association (TNL association) to the RAN. Specifically include the following steps:
  • Step 0 The AMF configures the service area (trace area, TA) list of the local control plane network element.
  • the TA list is used to describe the service area supported by the local control plane network element.
  • Step 1 The RAN initiates an NG setup (installation) process to the AMF.
  • the purpose of the NG setup procedure is to exchange application data required by the RAN and AMF so that the RAN and AMF can perform signaling interaction.
  • This process should be the first NGAP procedure triggered by TNLA (transport network layer association), which uses non-UE related signaling.
  • the RAN sends an NG setup request message to the AMF, which carries the identification information of the RAN and the supported TA list and other parameters.
  • the identification information of the RAN may be the global RAN node ID.
  • Step 2 The AMF returns a NG setup response message to the RAN, which carries the GUAMI list supported by the AMF.
  • the GUAMI list supported by AMF includes GUAMI-1 and GUAMI-2, among which,
  • GUAMI-1 ⁇ MCC> ⁇ MNC> ⁇ AMFRegionID> ⁇ AMFSetID> ⁇ AMFPointer-1>;
  • GUAMI-2 ⁇ MCC> ⁇ MNC> ⁇ AMFRegionID> ⁇ AMFSetID> ⁇ AMFPointer-2>;
  • AMF Pointer included in GUAMI-1 and GUAMI-2 are different, but both AMF Pointer-1 and AMF Pointer-2 can point to the AMF.
  • Step 3A If the AMF determines the service range of the RAN in the local control plane according to the TA of the RAN, it initiates an AMF configuration update (AMF configuration update) process, and sends the TNL association information corresponding to the GUAMI supported by the AMF to the RAN.
  • AMF configuration update AMF configuration update
  • the TNL association corresponding to GUAMI-1 is: TNL association address-1
  • the TNL association corresponding to GUAMI-2 is: local control plane TNL Association address-2.
  • GUAMI-1 and GUAMI-2 lie in the difference of AMF Pointer, but both AMF Pointer-1 and AMF Pointer-2 point to the same AMF.
  • Step 4 The RAN returns a configuration update acknowledgement (configuration update confirmation) message to the AMF.
  • the RAN After performing the above steps 0 to 4, the RAN has obtained the correspondence between GUAMI and TNL association. After the UE establishes the local service, the AMF can update the TNL association of the UE and trigger the RAN to redirect the NAS message of the terminal device.
  • the UE initiates a registration process.
  • the temporary identifier allocated by the AMF to the UE in this step is 5G-GUTI-1.
  • 5G-GUTI-1 includes GUAMI-1
  • GUAMI-1 includes AMF pointer-1
  • TNL association corresponding to AMF pointer-1 can be the address information of AMF. Therefore, the RAN can establish a UE-granular NGAP link with the AMF according to the TNL association corresponding to the AMF pointer-1.
  • the AMF locally stores the UE's mobility management context, including the UE's temporary identification 5G-GUTI-1, permanent identification, and RAN UE NGAP ID, AMF UE NGAP ID.
  • the RAN UE NGAP ID is used to uniquely identify an NGAP connection between a UE and the RAN
  • the AMF UE NGAP ID is used to uniquely identify an NGAP connection between a UE and an AMF.
  • the UE initiates a session establishment request to the AMF.
  • the session establishment request of the UE carries the session identifier, DNN and S-NSSAI.
  • the AMF After the AMF receives the session establishment request from the UE, it can call the SMF service (Nsmf_PDU Session_Create SM Context Request), that is, send the Nsmf_PDU Session_Create SM Context Request message to the SMF to trigger the SMF to create the session context.
  • the SMF can also determine that the session establishment request of the terminal device is a local service. For example, the SMF can determine that the request is a local service according to the location information of the UE, DNN or S-NSSAI.
  • the SMF requests the NRF for the identification of the local control plane network element.
  • the SMF can call Nnrf_NF Discovery_Request to request the identification of the local control plane network element, that is, the SMF can send the Nnrf_NF Discovery_Request message to the NRF.
  • the Nnrf_NF Discovery_Request request carries the UE's location information (User location information) and the requested network element type.
  • NRF can determine the identity of the local ground control network element based on the UE location information and the requested network element type, and return the local control plane to the SMF The identity of the network element.
  • the local control plane network element here may be the control plane network element in the communication network shown in FIG. 1.
  • the SMF initiates an N4 session establishment process.
  • the SMF transmits the identification of the local control plane network element to the AMF.
  • the SMF can pass the identity of the local control plane network element to the AMF through the Namf_Communication_N1N2MessageTransfer service.
  • the AMF network element After learning the identifier of the local control plane network element, the AMF network element transmits the mobility management context and the security context to the local control plane network element.
  • the mobility management context includes the UE's temporary identification 5G-GUTI-1, permanent identification, and RANUE NGAP ID, AMF UE NGAP ID.
  • the AMF sends an N2 request message to the RAN.
  • the RAN returns an N2 session response message.
  • the SMF sends the session management context corresponding to the local service to the local control plane network element.
  • the session management context can be user plane tunnel information of the N3 interface, QoS information, etc.
  • the AMF sends an N2 message to the RAN to trigger the RAN to update the NGAP UE-TNLA-binding.
  • the AMF Since in step 707, the AMF obtains the identity of the local control plane network element, it can be determined according to the identity of the local control plane network element that the UE has established a session corresponding to the local service.
  • the AMF can send an N2 message to the RAN to trigger the RAN to redirect subsequent NAS messages from the terminal device.
  • the N2 message is the second information described in the embodiment of the present invention.
  • the N2 message carries the TNL association corresponding to the UE, and the TNL association corresponds to the address information of the local control plane network element.
  • the RAN saves the TNL association in the N2 message in the context. If the UE is in the connected state, when the RAN subsequently receives a NAS message from the connected UE, the RAN can address the local control plane according to the TNL association in the context of the UE.
  • RAN UE NGAP ID and AMF UE NGAP ID are used for RAN and AMF to uniquely identify a UE on the NGAP connection, and the local control plane has obtained RAN UE NGAP ID and AMF UE NGAP ID, so the local control plane
  • the yuan subsequently receives the NAS message, RAN UE NGAP ID, and AMF UE NGAP ID sent by the RAN, it can determine the permanent identity of the UE in the context based on the RAN UE NGAP ID and AMF UE NGAP ID.
  • the AMF allocates a new 5G-GUTI to the UE.
  • the UE configuration update command is sent to the UE, and the UE configuration update command carries the newly allocated 5G-GUTI for the UE, for example, 5G-GUTI-2.
  • 5G-GUTI-2 includes GUAMI-2
  • GUAMI-2 includes AMF pointer-2
  • TNL association corresponding to AMF pointer-2 may be the address information of the local control plane network element. Therefore, the RAN can establish a UE-granular NGAP link with the local control plane network element according to the TNL association corresponding to AMFpointer-2.
  • the UE when the UE is in an idle state, the context of the UE locally stored in the RAN has been released, and when the UE sends a NAS message to the RAN, it can also send the newly allocated GUAMI in the 5G-GUTI, for example, GUAMI-2.
  • the RAN can establish a UE-granular NGAP link with the local control plane network element according to the TNL association corresponding to GUAMI-2, and route the NAS message of the terminal device to the local control plane network element.
  • the AMF can obtain the identification of the local control plane network element from the SMF, and update the TNL association corresponding to the NGAP connection of the UE granularity, that is, update the NGAP UE-TNLA-binding and trigger the RAN Route the NAS message subsequently sent by the terminal device to the local control plane network element.
  • an embodiment of the present invention also provides an addressing method. As shown in FIG. 10, the method includes the following steps:
  • the UE initiates a registration process.
  • the GUAMI supported by AMF can point to the local control plane network element.
  • AMF can support multiple pointers, which means multiple GUAMIs. Multiple GUAMIs can point to AMF and local control plane network elements respectively.
  • AMF supports GUAMI-1 and GUAMI-2.
  • GUAMI-1 includes Pointer-1
  • the TNL association corresponding to GUAMI-1 can be the address information of AMF, that is, GUAMI-1 is associated with AMF.
  • GUAMI-2 includes Pointer-2.
  • the TNL association corresponding to GUAMI-2 can be the address information of the local control plane network element, that is, GUAMI-2 is associated with the local control plane network element.
  • the AMF locally stores the UE's mobility management context, including the UE's temporary identification 5G-GUTI-1, permanent identification, RAN UE NGAP ID, and AMF UE NGAP ID.
  • the UE initiates a session establishment request, which carries the session identifier, DNN and S-NSSAI.
  • the AMF After receiving the registration request message from the UE, the AMF triggers the SMF to create a session context.
  • the AMF can call the SMF service Nsmf_PDU Session_Create SM Context Request to trigger the SMF to create a session context.
  • the SMF can also determine based on the location information of the UE, DNN, or S-NSSAI that the session establishment request requested is a local service.
  • the SMF initiates an N4 session establishment process.
  • SMF indicates AMF: this session is initiated for the local service of the UE.
  • the SMF sends the information of the local control plane network element to the AMF through the Namf_Communication_N1N2 Message Transfer service, and uses the information of the local control plane network element to indicate that this session of the AMF is initiated for the local service of the UE.
  • the SMF may also only send indication information to the AMF, indicating that this session is initiated for the local service of the UE, and the AMF needs to select a local control plane network element for the local service of the UE.
  • the AMF After the AMF receives the instruction information sent by the SMF, it executes the selection process of local (local) AMF and local SMF.
  • AMF can select local AMF and local SMF in the following two ways:
  • the first type is that the AMF requests the identification of the local AMF and local SMF from the NRF.
  • the AMF calls the Nnrf_NF Discovery_Request, that is, the AMF can send the Nnrf_NF Discovery_Request message to the NRF.
  • the message carries the location information of the UE and the requested network element type.
  • the NRF can determine the local AMF and local SMF according to the location information of the UE and the requested network element type. Furthermore, the NRF can return the local AMF ID and local SMF ID to the AMF.
  • the AMF configures the binding relationship between the local AMF ID, local SMF ID and the location relationship.
  • the AMF can select local AMF and local SMF according to the location information of the UE.
  • the AMF can also select the local AMF and local SMF methods through other methods, which are not limited in the embodiment of the present invention.
  • the AMF transfers the mobility management context and security context to local AMF.
  • the mobility management context includes the UE's temporary identification 5G-GUTI-1, permanent identification, RAN UE NGAP ID, AMF UE NGAP ID, and local SMF identification.
  • the request for the local AMF identifier is for the local AMF to handle the mobility management function.
  • the request for the identification of the local SMF is for the local SMF to process the session management function after the local AMF has processed the mobility management function.
  • the AMF sends an N2 request message to the RAN.
  • RRC Connection Reconfiguration (RRC connection reconfiguration) between the RAN and the UE.
  • the RAN returns an N2 response message.
  • the SMF service Nsmf_PDU Session_Update SM Context Request is invoked, and the message sent by the AMF carries the identifier of the local SMF so that the SMF can transfer part of the context to the local SMF, and the local SMF can handle the session management function according to the context transferred by the SMF.
  • the SMF sends the session management context corresponding to the local service to the local SMF.
  • the session management context corresponding to the local service may include user plane tunnel information of the N3 interface, quality of service (QoS), and so on.
  • QoS quality of service
  • the AMF triggers the RAN to update the NGAP UE-TNLA-binding (the NGAP and TNLA binding relationship of UE granularity).
  • the AMF Since the AMF has obtained the identification of the local control plane network element before, it can be determined according to the identification of the local control plane network element that the UE has established a session corresponding to the local service.
  • the AMF can send an N2 message to the RAN to trigger the RAN to redirect subsequent NAS messages from the terminal device.
  • the N2 message is the second information described in the embodiment of the present invention.
  • the N2 message carries the TNL association corresponding to the UE, and the TNL association corresponds to the address information of the local AMF.
  • the RAN saves the TNL association in the N2 message in the context. If the UE is in the connected state, when the RAN subsequently receives a NAS message from the connected UE, the RAN can address the local AMF according to the TNL association in the context of the UE.
  • RAN UE NGAP ID and AMF UE NGAP ID are used for RAN and AMF to uniquely identify a UE on the NGAP connection, and the local control plane has obtained RAN UE NGAP ID and AMF UE NGAP ID, so the local control plane
  • the yuan subsequently receives the NAS message, RAN UE NGAP ID, and AMF UE NGAP ID sent by the RAN, it can determine the permanent identity of the UE in the context based on the RAN UE NGAP ID and AMF UE NGAP ID.
  • the UE configuration update command is sent to the UE, and the UE configuration update command carries the newly allocated 5G-GUTI for the UE, for example, 5G-GUTI-2.
  • 5G-GUTI-2 includes GUAMI-2
  • GUAMI-2 includes AMF pointer-2
  • the TNL association corresponding to AMF pointer-2 may be local AMF address information. Therefore, the RAN can establish a UE-granular NGAP link with the local AMF according to the TNL association corresponding to AMFpointer-2.
  • the UE when the UE is in the idle state, the context of the UE stored locally in the RAN has been released, and when the UE sends a NAS message to the RAN, it can also send the newly allocated GUAMI in the 5G-GUTI, for example, GUAMI-2.
  • the RAN can establish a UE-granular NGAP link with the local AMF according to the TNL association corresponding to GUAMI-2, and route the NAS message of the terminal device to the local AMF.
  • the UE returns a configuration update complete (configuration update complete) message.
  • the configuration update complete returned by the UE is used to indicate "the UE has received a new 5G-GUTI".
  • the AMF can update the TNL association corresponding to the UE, that is, update the NGAP UE-TNLA-binding, and trigger the RAN to route the NAS message subsequently sent by the terminal device to the local AMF.
  • the embodiment of the present invention also provides an addressing method, which can be applied to the communication system shown in FIG. 1 to realize the correct routing of the NAS message set by the terminal.
  • the premise of this method is that the RAN configures the correspondence between GUAMI and TNL Association with reference to the flow in FIG. 9. As shown in Figure 11, the method includes the following steps:
  • the UE initiates a registration process.
  • the GUAMI supported by AMF can point to the local control plane network element.
  • AMF can support multiple pointers, which means multiple GUAMIs. Multiple GUAMIs can point to AMF and local control plane network elements respectively.
  • AMF supports GUAMI-1 and GUAMI-2.
  • GUAMI-1 includes Pointer-1
  • the TNL association corresponding to GUAMI-1 can be the address information of AMF, that is, GUAMI-1 is associated with AMF.
  • GUAMI-2 includes Pointer-2.
  • the TNL association corresponding to GUAMI-2 can be the address information of the local control plane network element, that is, GUAMI-2 is associated with the local control plane network element.
  • the AMF locally stores the UE's mobility management context, including the UE's temporary identification 5G-GUTI-1, permanent identification, RAN UE NGAP ID, and AMF UE NGAP ID.
  • the UE initiates a session establishment request, which carries the session identifier, DNN, and S-NSSAI.
  • the AMF After the AMF receives the session establishment request from the UE, it calls the SMF service Nsmf_PDU Session_Create SM Context Request to trigger the SMF to create the session context.
  • SMF can also determine that the session establishment request this time is a local service based on the location information of the UE, DNN or S-NSSAI.
  • the SMF can call Nnrf_NFDiscovery_Request, which carries the location information of the UE and the requested network element type.
  • the NRF can determine the local control plane network element capable of handling the local service of the UE according to the location information of the UE and the requested network element type, and Return the identification of the local control plane network element to the SMF.
  • the local control plane network element here is an independent local control plane network element in the communication system shown in FIG. 1.
  • the SMF initiates an N4 session establishment process.
  • the SMF transmits the identification of the local control plane network element to the AMF.
  • the SMF can pass the identity of the local control plane network element to the AMF through the Namf_Communication_N1N2 Message Transfer service.
  • the AMF network element After obtaining the identifier of the local control plane network element, the AMF network element transmits the mobility management context and the security context to the local control plane network element.
  • the mobility management context includes the UE's temporary identification 5G-GUTI-1, permanent identification, RAN UE NGAP ID, and AMF UE NGAP ID.
  • the AMF Since the AMF has obtained the identification of the local control plane network element before, it can be determined according to the identification of the local control plane network element that the UE has established a session corresponding to the local service.
  • the AMF can send an N2 request message to the RAN to trigger the RAN to redirect subsequent NAS messages from the terminal device.
  • the N2 request message may be the second information described in the embodiment of the present invention.
  • the N2 request message carries the TNL association corresponding to the UE, and the TNL association corresponds to the address information of the local control plane network element.
  • the RAN saves the TNL association in the N2 request message in the context. If the UE is in the connected state, when the RAN subsequently receives a NAS message from the connected UE, the RAN can address the local control plane according to the TNL association in the context of the UE.
  • RAN UE NGAP ID and AMF UE NGAP ID are used for RAN and AMF to uniquely identify a UE on the NGAP connection, and the local control plane has obtained RAN UE NGAP ID and AMF UE NGAP ID, so the local control plane
  • the yuan subsequently receives the NAS message, RAN UE NGAP ID, and AMF UE NGAP ID sent by the RAN, it can determine the permanent identity of the UE in the context based on the RAN UE NGAP ID and AMF UE NGAP ID.
  • RRC connection reconfiguration (RRC connection reconfiguration) between the RAN and the UE.
  • the RAN returns an N2 response message to the local control plane network element.
  • the RAN may send the N2 response message to the local control plane network element. If the local control plane network element cannot process the N2 response message, it is forwarded to the AMF for processing.
  • the SMF sends the session management context corresponding to the local service to the local control plane network element.
  • the session management context corresponding to the local service may include user plane tunnel information, QoS information, etc. of the N3 interface.
  • the AMF allocates a new 5G-GUTI to the UE.
  • the UE configuration update command is sent to the UE, and the UE configuration update command carries the newly allocated 5G-GUTI for the UE, for example, 5G-GUTI-2.
  • 5G-GUTI-2 includes GUAMI-2
  • GUAMI-2 includes AMF pointer-2
  • TNL association corresponding to AMF pointer-2 may be the address information of the local control plane network element. Therefore, the RAN can establish a UE-granular NGAP link with the local control plane network element according to the TNL association corresponding to the AMF pointer-2.
  • the UE when the UE is in an idle state, the context of the UE locally stored in the RAN has been released, and when the UE sends a NAS message to the RAN, it can also send the newly allocated GUAMI in the 5G-GUTI, for example, GUAMI-2.
  • the RAN can establish a UE-granular NGAP link with the local control plane network element according to the TNL association corresponding to GUAMI-2, and route the NAS message of the terminal device to the local control plane network element.
  • the UE returns a configuration update complete (configuration update complete) message.
  • an embodiment of the present invention also provides an addressing method. As shown in FIG. 12, the method includes the following steps:
  • the UE initiates a registration process.
  • the GUAMI supported by AMF can point to the local control plane network element.
  • AMF can support multiple pointers, which means multiple GUAMIs. Multiple GUAMIs can point to AMF and local control plane network elements respectively.
  • AMF supports GUAMI-1 and GUAMI-2.
  • GUAMI-1 includes Pointer-1
  • the TNL association corresponding to GUAMI-1 can be the address information of AMF, that is, GUAMI-1 is associated with AMF.
  • GUAMI-2 includes Pointer-2.
  • the TNL association corresponding to GUAMI-2 can be the address information of the local control plane network element, that is, GUAMI-2 is associated with the local control plane network element.
  • the AMF locally stores the UE's mobility management context, including the UE's temporary identification 5G-GUTI-1, permanent identification, RAN UE NGAP ID, and AMF UE NGAP ID.
  • the UE initiates a session establishment request, which carries the session identifier, DNN and S-NSSAI.
  • the AMF After receiving the session establishment request message from the UE, the AMF triggers the SMF to create the session context.
  • the AMF can call the SMF service Nsmf_PDU Session_Create SM Context Request to trigger the SMF to create a session context.
  • the SMF can determine that the session establishment request is a local service according to the location information of the UE, DNN or S-NSSAI.
  • the SMF initiates an N4 session establishment process.
  • SMF indicates AMF: this session is initiated for the local service of the UE.
  • the SMF sends the information of the local control plane network element to the AMF through the Namf_Communication_N1N2 Message Transfer service, and uses the information of the local control plane network element to indicate that this session of the AMF is initiated for the local service of the UE.
  • the SMF may also only send indication information to the AMF, indicating that this session is initiated for the local service of the UE, and the AMF needs to select a local control plane network element for the local service of the UE.
  • the AMF executes the selection process of local (local) AMF and local (local) SMF.
  • AMF can select local AMF and local SMF in the following two ways:
  • the first type is that the AMF requests the identification of the local AMF and local SMF from the NRF.
  • AMF calls Nnrf_NF Discovery_Request, which carries the location information of the UE and the requested network element type.
  • NRF can determine whether the local service of the UE is handled by local AMF or local SMF according to the location information of the UE and the requested network element type. . Furthermore, the NRF can return the local AMF ID and local SMF ID to the AMF.
  • the AMF configures the binding relationship between the local AMF ID, local SMF ID and the location relationship.
  • the AMF can select local AMF and local SMF according to the location information of the UE.
  • the AMF can also select the local AMF and local SMF methods through other methods, which are not limited in the embodiment of the present invention.
  • the mobility management context includes the UE's temporary identification 5G-GUTI-1, permanent identification, RAN UE NGAP ID, AMF UE NGAP ID, and local SMF identification.
  • the AMF triggers the RAN to update the NGAP UE-TNLA-binding (the NGAP and TNLA binding relationship of UE granularity).
  • the AMF may send an N2 request message to the RAN, carrying the TNL association corresponding to the UE.
  • the TNL association corresponds to local AMF address information.
  • the RAN can also save the TNL association corresponding to the UE in the context. If the UE is in the connected state, when the RAN subsequently receives the NAS message from the connected UE, the RAN addresses the local AMF according to the TNL association in the context of the UE.
  • RRC connection reconfiguration (RRC connection reconfiguration) between the RAN and the UE.
  • the RAN returns an N2 response message.
  • step 1207 Since step 1207 has triggered the redirection of the control plane, the RAN will send the N2 response message to the local AMF. If the local AMF cannot process the N2 response message, it is forwarded to the AMF for processing.
  • the AMF sends a local SMF identifier to the SMF.
  • the AMF invokes the SMF service Nsmf_PDU Session_Update SM Context Request, and this message carries the identifier of the local SMF.
  • the SMF sends the session management context corresponding to the local service to the local SMF network element.
  • the session management context corresponding to the local service may include user plane tunnel information, QoS information, etc. of the N3 interface.
  • the AMF allocates a new 5G-GUTI to the UE.
  • the UE configuration update command is sent to the UE, and the UE configuration update command carries the newly allocated 5G-GUTI for the UE, for example, 5G-GUTI-2.
  • 5G-GUTI-2 includes GUAMI-2
  • GUAMI-2 includes AMF pointer-2
  • the TNL association corresponding to AMF pointer-2 may be local AMF address information. Therefore, the RAN can establish a UE-granular NGAP link with the local AMF according to the TNL association corresponding to the AMF pointer-2.
  • the UE when the UE is in an idle state, the context of the UE locally stored in the RAN has been released, and when the UE sends a NAS message to the RAN, it can also send the newly allocated GUAMI in the 5G-GUTI, for example, GUAMI-2.
  • the RAN can establish a UE-granular NGAP link with the local AMF according to the TNL association corresponding to GUAMI-2, and route the NAS message of the terminal device to the local AMF.
  • the UE returns a UE configuration update complete (configuration update complete) message.
  • the embodiment of the present invention also provides an addressing method.
  • the RAN can correctly address the NAS message from the terminal device according to the pre-configured target network element information and the information type corresponding to the target network element.
  • the method includes the following steps:
  • the RAN configures the information of the target network element and the information type corresponding to the target network element.
  • what is configured on the RAN can be the correspondence between the information type and the TNL association. Since TNL association can point to a certain network element, the RAN can send the NAS message from the terminal device according to the correspondence between the information type and the TNL association. To the target network element.
  • the target network element may be an AMF or a local control plane network element.
  • the information type may include a first type (type-1) and a second type (type-2).
  • the TNL association corresponding to the type-1 message can be the address information of the AMF, that is, the target network element corresponding to the type-1 message is AMF;
  • the TNL association corresponding to the type-2 message can be the local control plane network Element address information, that is, the target network element corresponding to the type-2 message is the local control plane network element.
  • the corresponding relationship between the RAN information type and the target network element can be configured according to the process shown in Figure 14, which specifically includes:
  • Step S0 The RAN initiates an NG setup (installation) process to the AMF.
  • the purpose of the NG setup process is to exchange application data required by the RAN and AMF so that the RAN and AMF can perform signaling interaction.
  • This procedure should be the first NGAP procedure triggered by TNLA, and the signaling used in this procedure is not related to the UE.
  • the RAN may send a NG setup request message to the AMF, and the message carries the global RAN node ID and the TA list supported by the RAN.
  • Step S1. AMF returns a NG setup response (installation response) message.
  • the message carries the GUAMI list supported by the AMF.
  • the GUAMI list supported by the AMF includes GUAMI-1. It should be noted that if the local control plane network element is within the service range of the AMF, only one GUAMI needs to be configured for the AMF, but the GUAMI can correspond to different TNL associations.
  • GUAMI-1 ⁇ MCC> ⁇ MNC> ⁇ AMFRegionID> ⁇ AMFSetID> ⁇ AMFPointer-1>.
  • Step S2 AMF initiates an AMF configuration update (configuration update) process.
  • the request message sent by the AMF to the RAN in this procedure carries the TNL Association information corresponding to the GUAMI supported by the AMF.
  • the GUAMI list supported by AMF is GUAMI-1. If the information type is type-1, the TNL Association (association) corresponding to GUAMI-1 can be "TNL association address-1"; if the information type is type-2, GUAMI-1 corresponds to TNL association can be "TNL association address (address)-2".
  • Step S3 The RAN returns a configuration update acknowledgement message to the AMF.
  • the UE initiates a registration process.
  • the UE will send a registration request message to the RAN to initiate the registration process.
  • the RAN considers that the registration request message sent by the UE this time is type-1 by default, and therefore selects AMF to process the UE registration request message.
  • the AMF stores the UE's mobility management context locally.
  • the UE's mobility management context includes the UE's temporary identification 5G-GUTI, permanent identification, RAN UE NGAP ID, and AMF UE NGAP ID.
  • the UE initiates a session establishment request.
  • the SMF requests the NRF for the identification of the local control plane network element.
  • the SMF can call Nnrf_NFDiscovery_Request, which carries the location information of the UE and the requested network element type.
  • the NRF can determine the local control plane network element capable of handling the local service of the UE according to the location information of the UE and the requested network element type, and Return the identification of the local control plane network element to the SMF.
  • the local control plane network element here is an independent local control plane network element in the communication system shown in FIG. 1.
  • the SMF initiates an N4 session establishment process.
  • the SMF transmits the identity of the local control plane network element to the AMF through the Namf_Communication_N1N2MessageTransfer service.
  • the AMF network element transfers the mobility management context and the security context to the local control plane network element.
  • the mobility management context includes the UE's temporary identification 5G-GUTI, permanent identification, RAN UE NGAP ID, and AMF UE NGAP ID.
  • the AMF sends an N2 request message to the RAN.
  • RRC connection reconfiguration (RRC connection reconfiguration) between the RAN and the UE.
  • the SMF sends the session management context corresponding to the local service to the local control plane network element.
  • the session management context corresponding to the local service may include user plane tunnel information, QoS information, etc. of the N3 interface.
  • the AMF sends a UE configuration update command (configuration update request) to the UE, indicating the information type of the NAS message sent by the UE to the RAN.
  • the UE configuration update command is the configuration update request information described in the embodiment of the present invention.
  • the UE needs to send the information type to the RAN when it subsequently sends the NAS message, so that the RAN can route the NAS message to the AMF or the local control plane network element according to the information type.
  • the UE when the UE subsequently initiates a service request (SR) process and a session establishment process, the corresponding NAS message needs to be processed by the local control plane network element, that is, the information type of the NAS message generated in this process is type- 2.
  • the UE sends these messages, it also sends the information type "type-2" to the RAN.
  • the RAN can determine that the target network element of the received NAS message is the local control plane network element, and then the received NAS The message is sent to the local control plane network element so that the NAS message generated in the SR process and the session establishment process is terminated on the local control plane.
  • the UE subsequently initiates a registration update process or a periodic registration update process, and the corresponding NAS message needs to be processed by the AMF, that is, the information type of the NAS message generated in this process is type-1.
  • the UE sends these messages, it also sends the information type "type-1" to the RAN.
  • the RAN can determine that the target network element of the received NAS message is AMF, and then sends the received NAS message to AMF , So that the NAS message generated in the registration update process or the periodic registration update process is terminated on the AMF.
  • the UE returns a UE configuration update complete (configuration update complete) message.
  • an embodiment of the present invention also provides an addressing method. As shown in FIG. 15, the method includes the following steps:
  • step 1301 for the specific configuration method of the RAN, refer to the related description of step 1301, and refer to the configuration process shown in FIG. 14 to configure the correspondence between the information type and the target network element on the RAN, which is not repeated in this embodiment of the present invention.
  • the UE initiates a registration process.
  • the UE will send a registration request message to the RAN to initiate the registration process.
  • the RAN considers that the registration request message sent by the UE this time is type-1 by default, and therefore selects AMF to process the UE registration request message.
  • the AMF stores the UE's mobility management context locally.
  • the UE's mobility management context includes the UE's temporary identification 5G-GUTI, permanent identification, RAN UE NGAP ID, and AMF UE NGAP ID.
  • the UE initiates a session establishment request.
  • the UE sends a session establishment request message to the AMF, and the message carries the session identifier, DNN, and S-NSSAI.
  • the AMF can also call the SMF service Nsmf_PDU Session_Create SM Context Request to trigger the SMF to create the session context.
  • the SMF can also determine that the session establishment request is a local service according to the location information of the UE, DNN or S-NSSAI.
  • the SMF initiates an N4 session establishment process.
  • the SMF indicates AMF: This session is initiated for the local service of the UE.
  • the SMF sends the information of the local control plane network element to the AMF through the Namf_Communication_N1N2 Message Transfer service, and uses the information of the local control plane network element to indicate that this session of the AMF is initiated for the local service of the UE.
  • the SMF may also only send indication information to the AMF, indicating that this session is initiated for the local service of the UE, and the AMF needs to select a local control plane network element for the local service of the UE.
  • the AMF network element executes a process of selecting local (local) AMF and local SMF network elements.
  • AMF can select local AMF and local SMF in the following two ways:
  • the first type is that the AMF requests the identification of the local AMF and local SMF from the NRF.
  • AMF calls Nnrf_NF Discovery_Request, which carries the location information of the UE and the requested network element type.
  • NRF can determine whether the local service of the UE is handled by local AMF or local SMF according to the location information of the UE and the requested network element type. . Furthermore, the NRF can return the local AMF ID and local SMF ID to the AMF.
  • the AMF configures the binding relationship between the local AMF ID, local SMF ID and the location relationship.
  • the AMF can select local AMF and local SMF according to the location information of the UE.
  • the AMF can also select the local AMF and local SMF methods through other methods, which are not limited in the embodiment of the present invention.
  • the mobility management context includes the UE's temporary identification 5G-GUTI-1, permanent identification, RAN UE NGAP ID, AMF UE NGAP ID, and local SMF identification.
  • the AMF sends an N2 request message to the RAN.
  • RRC connection reconfiguration (RRC connection reconfiguration) between the RAN and the UE.
  • the AMF sends the local SMF identifier to the SMF.
  • the SMF sends the session management context corresponding to the local service to the local SMF network element.
  • the session management context corresponding to the local service may include user plane tunnel information, QoS information, etc. of the N3 interface.
  • step 1312 For a specific implementation manner, refer to the related description of step 1312, which is not repeated here.
  • FIG. 16 shows a possible structural schematic diagram of the communication device involved in the foregoing embodiment.
  • the communication device shown in FIG. 8 may be the access mobility management function network element (or terminal device, or wireless access network equipment) described in the embodiment of the present application, or it may be the access mobility management function network element (or terminal device). , Or radio access network equipment) that implements the above method, or it can also be a chip applied to access mobility management function network elements (or terminal devices, or radio access network equipment).
  • the chip may be a System-On-a-Chip (SOC) or a baseband chip with communication function.
  • the communication device includes a processing unit 1601 and a communication unit 1602.
  • the processing unit may be one or more processors, and the communication unit may be a transceiver.
  • the processing unit 1601 is used to support the access mobility management function network element to perform the steps of "generating second information", "determining that the terminal device has established a local service", etc., and is used to support the wireless access network device to determine "to the first network element” Send third information" and/or other processes used in the techniques described herein.
  • the communication unit 1602 is used to support the communication between the communication device and other communication devices, for example, to support the wireless access network equipment to perform steps 501, 502, 504, 505, 601, 602, 604, 605, and to support access mobility management
  • the functional network element executes steps 502, 503, 504, 505, 601, and 603, and supports the terminal device to execute steps 501, 505, 603, 604, and/or other processes used in the technology described herein.
  • the communication device includes: a processing module 1701 and a communication module 1702.
  • the processing module 1701 is used to control and manage the actions of the communication device, for example, to perform the steps performed by the above-mentioned processing unit 1601, and/or to perform other processes of the technology described herein.
  • the communication module 1702 is configured to perform the steps performed by the above-mentioned communication unit 1602, and supports interaction between the communication device and other devices, such as interaction with other terminal devices.
  • the communication device may further include a storage module 1703, and the storage module 1703 is used to store the program code and data of the communication device.
  • the processing module 1701 is a processor
  • the communication module 1702 is a transceiver
  • the storage module 1703 is a memory
  • the communication device is the communication device shown in FIG. 3.
  • the embodiment of the present invention provides a computer-readable storage medium, and the computer-readable storage medium stores instructions; the instructions are used to execute the addressing methods shown in FIGS. 5-7 and 9-15.
  • the embodiment of the present invention provides a computer program product including instructions, which when running on a communication device, causes the communication device to execute the addressing methods shown in FIGS. 5-7 and 9-15.
  • a wireless communication device includes: instructions stored in the wireless communication device; when the wireless communication device is running on the communication device shown in FIG. 3, FIG. 16, and FIG. The addressing methods shown in Figure 7, Figure 9 to Figure 15.
  • the wireless communication device may be a chip.
  • the disclosed database access device and method can be implemented in other ways.
  • the embodiments of the database access device described above are only illustrative.
  • the division of the modules or units is only a logical function division.
  • the displayed or discussed mutual couplings or direct couplings or communication connections may be indirect couplings or communication connections through some interfaces, database access devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate parts may or may not be physically separate.
  • the parts displayed as units may be one physical unit or multiple physical units, that is, they may be located in one place, or they may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium.
  • the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of software products, which are stored in a storage medium It includes several instructions to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

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Abstract

本申请实施例公开了一种寻址方法、通信装置及系统，涉及通信领域，能够将终端装置的NAS信令路由至本地控制面网元，避免信令传输路径过于迂回，减少终端装置本地业务请求流程的时延。包括：接入移动管理功能网元接收无线接入网设备发送的来自终端装置的第一信息；所述第一信息用于请求为所述终端装置建立本地业务的会话；接入移动管理功能网元确定所述终端装置建立了本地业务；所述接入移动管理功能网元向所述无线接入网设备发送第二信息，所述第二信息包括第一地址，所述第一地址指向第一网元。

Description

一种寻址方法、通信装置及系统
本申请要求于2019年5月7日提交国家知识产权局、申请号为201910377199.2、申请名称为“一种寻址方法、通信装置及系统”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。
技术领域
本申请实施例涉通信领域，尤其涉及一种寻址方法、通信装置及系统。
背景技术
5G通信系统中，通过在靠近用户附着接入点的位置部署移动边缘计算(mobile edge computing，MEC)平台可以使得运营商和第三方通过降低时延和负载来实现高效的业务分发。示例的，如图1所示，会话管理功能(session management function，SMF)网元和接入移动管理功能(access and mobility management function，AMF)网元都是集中部署在网络中较高的位置，无线接入网(radio access network，RAN)设备、用户面功能(user plane function，UPF)网元部署在本地。参考图1，当终端装置发起MEC业务相关的业务请求流程，终端装置的业务请求消息要先经过位于部署位置较高的控制面网元处理之后，才建立网络边缘部署的UPF与RAN之间的用户面传输路径，信令传输路径比较迂回，这就导致终端装置的业务请求流程时延较长。
针对终端装置请求的本地业务(例如，MEC业务)，为了减少控制面信令交互的时延，可以在靠近UPF的位置引入一个本地控制面网元作为本地信令代理，这样控制面信令不需要传输到AMF和SMF进行处理，本地控制面网元在本地就可以寻呼终端装置以及处理终端装置的业务请求消息，大大缩短了信令处理的时延。但是由于RAN不感知本地控制面网元的存在，当RAN接收到来自终端装置的非接入层(non-access stratum，NAS)信令时，RAN仍然将NAS信令路由到AMF，这样就会导致信令传输路径比较迂回，因此RAN如何将终端装置的NAS信令路由到本地控制面是亟需解决的问题。
发明内容
本申请实施例提供一种寻址方法、通信装置及系统，能够将终端装置的NAS信令路由至本地控制面网元，避免信令传输路径过于迂回，减少终端装置本地业务请求流程的时延。
为达到上述目的，本申请实施例采用如下技术方案：
第一方面，公开了一种寻址方法，包括：无线接入网设备向接入移动管理功能网元发送来自终端装置的第一信息，其中，第一信息用于请求为所述终端装置建立本地业务的会话。无线接入网设备还可以接收接入移动管理功能网元发送的第二信息，第二信息包括第一地址，第一地址指向第一网元；无线接入网设备还可以接收终端装置发送的第三信息，根据第一地址向第一网元发送第三信息。
本发明实施例提供的方法中，无线接入网设备接收接入移动管理功能网元发送的第一地址。后续流程中，当无线接入网设备接收终端装置发送的NAS消息(如本发明实施例所述的第三信息)，可以根据本地控制面网元的地址向本地控制面网元发送终 端装置的NAS消息。可见，在为终端装置建立MEC业务时，本发明实施例可以通过接入移动管理功能网元的指示，使得无线接入网设备将NAS消息路由至本地控制面网元，避免NAS消息传输路径过于迂回，减少终端装置业务请求流程的时延。
结合第一方面，在第一方面的第一种可能的实现方式中，第一信息和第三信息为终端装置发送的非接入层NAS消息。
本发明实施例中，可以将终端装置发送的NAS消息路由至本地控制面网元，避免信令传输路径过于迂回，减少终端装置本地业务请求流程的时延。
结合第一方面或第一方面的第一种可能的实现方式，在第一方面的第二种可能的实现方式中，方法还包括：无线接入网设备接收终端装置发送的第一标识，第一标识与第一网元关联。
本发明实施例中，当终端装置处于空闲态，终端装置向无线接入网设备发送第一标识和NAS消息(即本发明实施例所述的第三信息)，由于第一标识和第一网元关联，使得无线接入网设备可以根据第一标识寻址到第一网元。
结合第一方面的第二种可能的实现方式，在第一方面的第三种可能的实现方式中，根据第一地址向第一网元发送第三信息，包括：根据第一标识确定第三信息的寻址地址为第一网元，向第一网元发送第三信息。
本发明实施例中，由于第一标识和第一网元关联，无线接入网设备接收终端装置发送的第三信息和第一标识，就可以确定第三信息的寻址地址为第一网元，进而向第一网元发送第三信息。
结合第一方面或第一方面的第一至第三种可能的实现方式中的任意一种，在第一方面的第四种可能的实现方式中，第一网元为本地控制面网元。
本发明实施例中，无线接入网设备可以将终端装置在本地业务流程中涉及的信令路由至本地控制面网元，避免信令传输路径过于迂回，减少终端装置本地业务请求流程的时延。
第二方面，公开了一种寻址方法，包括：接入移动管理功能网元接收无线接入网设备发送的来自终端装置的第一信息；第一信息用于请求为所述终端装置建立本地业务的会话；接入移动管理功能网元可以确定终端装置建立了本地业务，并向无线接入网设备发送第二信息，第二信息包括第一地址，第一地址指向第一网元。
本发明实施例提供的方法中，接入移动管理功能网元确定终端装置请求了本地业务后，可以向无线接入网设备发送本地控制面网元的地址(如本发明实施例所述的第一地址)。后续流程中，当无线接入网设备接收终端装置发送的NAS消息(如本发明实施例所述的第三信息)，可以根据本地控制面网元的地址向本地控制面网元发送终端装置的NAS消息。可见，在为终端装置建立MEC业务时，本发明实施例可以通过接入移动管理功能网元的指示，使得无线接入网设备将NAS消息路由至本地控制面网元，避免NAS消息传输路径过于迂回，减少终端装置业务请求流程的时延。
结合第二方面，在第二方面的第一种可能的实现方式中，第一信息为终端装置发送的非接入层NAS消息。
结合第二方面或第二方面的第一种可能的实现方式，在第二方面的第二种可能的实现方式中，接入移动管理功能网元确定终端装置建立了本地业务，包括：接收会话 管理功能网元发送的指示信息，指示信息用于指示终端装置建立了本地业务；根据指示信息确定终端装置建立了本地业务。
结合第二方面或第二方面的第一种可能的实现方式，在第二方面的第三种可能的实现方式中，接入移动管理功能网元确定终端装置建立了本地业务，包括：接收会话管理功能网元发送的第一网元的信息，根据第一网元的信息确定终端装置建立了本地业务。
结合第二方面或第二方面的第一至第三种可能的实现方式中的任意一种，在第二方面的第四种可能的实现方式中，方法还包括：向终端装置发送第一标识，第一标识与第一网元关联。
结合第二方面或第二方面的第一至第四种可能的实现方式中的任意一种，在第二方面的第五种可能的实现方式中，第一网元为本地控制面网元。
第三方面，公开了一种寻址方法，包括：接入移动管理功能网元向无线接入网设备发送目标网元以及与目标网元对应的信息类型；接入移动管理功能网元确定终端装置建立了本地业务，向终端装置发送配置更新请求信息；其中，配置更新请求信息用于指示终端装置向无线接入网设备发送第一信息的信息类型，第一信息用于无线接入网设备根据第一信息的信息类型向目标网元发送第一信息；其中，目标网元包括接入移动管理功能网元或本地控制面网元。
本发明实施例提供中，接入移动管理功能网元(如AMF)预先向无线接入网设备配置目标网元的信息以及目标网元对应的信息类型，并指示终端装置将NAS消息以及NAS消息的类型发送给无线接入网设备。进而，无线接入网设备可以根据终端装置发送的NAS消息以及信息类型，正确路由NAS消息。当终端装置请求了本地业务，终端装置的NAS消息可以由本地控制面网元处理，为终端装置建立本地业务。可见，本发明实施例提供的方法中，通过接入移动管理功能网元的指示，使得无线接入网设备实现NAS消息的正确路由，减少终端装置本地业务处理的时延，以便更快速地为终端装置建立本地业务。
结合第三方面，在第三方面的第一种可能的实现方式中，目标网元为接入移动管理功能网元，则目标网元对应的信息类型为第一类型，若目标网元为本地控制面网元，则目标网元对应的信息类型为第二类型。
本发明实施例中，接入移动管理功能网元将第一类型的消息配置为需要发送给接入移动管理功能网元的消息，将第一类型的消息配置为需要发送给本地控制面网元的消息，使得无线接入网设备可以根据信息类型准确寻址消息。对于终端装置请求本地业务涉及的相关消息，无线接入网设备将这些消息路由至本地控制面网元，避免信令传输路径过于迂回，减少终端装置本地业务请求流程的时延。另外，对于需要接入移动管理功能网元需要处理的消息，无线接入网设备可以将这些消息路由至接入移动管理功能网元，不再经过本地控制面网元的转发，大大降低了本地控制面网元的转发负荷。
结合第三方面或第三方面的第一种可能的实现方式，在第三方面的第二种可能的实现方式中，第一信息为终端装置发送的非接入层NAS消息。
结合第三方面或第三方面的第一或第二种可能的实现方式，在第三方面的第三种 可能的实现方式中，接入移动管理功能网元确定终端装置建立了本地业务，包括：接收会话管理功能网元发送的指示信息，根据指示信息确定终端装置建立了本地业务；指示信息用于指示终端装置建立了本地业务。
本发明实施例中，当终端装置建立了本地业务，会话管理功能网元可以向接入移动管理功能网元发送特定的指示信息，通知接入移动管理功能网元“终端装置已经建立了本地业务”。
结合第三方面或第三方面的第一或第二种可能的实现方式，在第三方面的第四种可能的实现方式中，接入移动管理功能网元确定终端装置建立了本地业务，包括：
接收会话管理功能网元发送的本地控制面网元的信息，根据本地控制面网元的信息确定终端装置建立了本地业务。
本发明实施例中，当终端装置建立了本地业务，会话管理功能网元可以向接入移动管理功能网元发送本地控制面网元的信息，通知接入移动管理功能网元“终端装置已经建立了本地业务”。
第四方面，公开了一种寻址方法，无线接入网设备接收接入移动管理功能网元发送的目标网元的信息以及目标网元对应的信息类型；无线接入网设备接收终端装置发送的第一信息以及第一信息的信息类型，根据第一信息的信息类型向目标网元发送第一信息；目标网元包括接入移动管理功能网元或本地控制面网元。
本发明实施例提供中，接入移动管理功能网元(如AMF)预先向无线接入网设备配置目标网元的信息以及与目标网元对应的信息类型，并指示终端装置将NAS消息以及NAS消息的类型发送给无线接入网设备。进而，无线接入网设备可以根据终端装置发送的NAS消息以及信息类型，正确路由NAS消息。当终端装置请求了本地业务，终端装置的NAS消息可以由本地控制面网元处理，为终端装置建立本地业务。可见，本发明实施例提供的方法中，通过接入移动管理功能网元的指示，使得无线接入网设备实现NAS消息的正确路由，减少终端装置本地业务处理的时延，以便更快速地为终端装置建立本地业务。
结合第四方面，在第四方面的第一种可能的实现方式中，目标网元为接入移动管理功能网元，则目标网元对应的信息类型为第一类型的消息对应的，目标网元为本地控制面网元，则目标网元对应的信息类型为第二类型。
结合第四方面或第四方面的第一种可能的实现方式中，在第四方面的第二种可能的实现方式中，无线接入网设备根据第一信息的信息类型向目标网元发送第一信息，具体包括：根据与所述目标网元所对应的信息类型确定所述目标网元。
结合第四方面或第四方面的第一或第二种可能的实现方式中，在第四方面的第三种可能的实现方式中，第一信息为终端装置发送的非接入层NAS消息。
第五方面，公开了一种寻址方法，包括：
终端装置接收接入移动管理功能网元发送的配置更新请求信息；配置更新请求信息用于指示终端装置向无线接入网设备发送第一信息的信息类型；
终端装置向无线接入网设备发送第一信息以及第一信息的信息类型，以便无线接入网设备根据第一信息的信息类型向目标网元发送第一信息；目标网元包括接入移动管理功能网元或本地控制面网元。
结合第五方面，在第五方面的第一种可能的实现方式中，第一信息为终端装置发送的非接入层NAS消息。
第六方面，公开了一种系统，包括：无线接入网设备和接入移动管理功能网元；
其中，接入移动管理功能网元用于，接收无线接入网设备发送的来自终端装置的第一信息，确定终端装置建立了本地业务，并向无线接入网设备发送第二信息，第二信息包括第一地址，第一地址指向第一网元；第一信息用于请求为所述终端装置建立本地业务的会话；无线接入网设备用于，向接入移动管理功能网元发送第一信息，接收接入移动管理功能网元发送的第二信息，接收终端装置发送的第三信息，根据第一地址向第一网元发送第三信息；
或，
接入移动管理功能网元用于，向无线接入网设备发送目标网元的信息以及目标网元对应的信息类型，确定终端装置建立了本地业务，向终端装置发送配置更新请求信息；配置更新请求信息用于指示终端装置向无线接入网设备发送第一信息的信息类型，第一信息的类型用于无线接入网设备根据第一信息的信息类型向目标网元发送第一信息；其中，目标网元包括接入移动管理功能网元或本地控制面网元；无线接入网设备用于，接收接入移动管理功能网元发送的目标网元的信息以及目标网元对应的信息类型，接收终端装置发送的第一信息以及第一信息的信息类型，根据第一信息的信息类型向目标网元发送第一信息。
第七方面，公开了一种接入移动管理功能网元，包括：通信单元，用于向接入移动管理功能网元发送来自终端装置的第一信息，其中，第一信息用于请求为所述终端装置建立本地业务的会话。通信单元还用于，接收接入移动管理功能网元发送的第二信息，第二信息包括第一地址，第一地址指向第一网元；通信单元还用于，接收终端装置发送的第三信息，根据第一地址向第一网元发送第三信息。
结合第七方面，在第七方面的第一种可能的实现方式中，第一信息和第三信息为终端装置发送的非接入层NAS消息。
结合第七方面或第七方面的第一种可能的实现方式，在第七方面的第二种可能的实现方式中，通信单元还用于，接收终端装置发送的第一标识，第一标识与第一网元关联。
结合第七方面的第二种可能的实现方式，在第七方面的第三种可能的实现方式中，还包括处理单元，处理单元用于，根据第一标识确定第三信息的寻址地址为第一网元，向第一网元发送第三信息。
结合第七方面或第七方面的第一至第三种可能的实现方式中的任意一种，在第七方面的第四种可能的实现方式中，第一网元为本地控制面网元。
第八方面，公开了一种接入移动管理功能网元，包括：通信单元，用于接收无线接入网设备发送的来自终端装置的第一信息；第一信息用于请求为所述终端装置建立本地业务的会话；处理单元，用于确定终端装置建立了本地业务；通信单元还用于，向无线接入网设备发送第二信息，第二信息包括第一地址，第一地址指向第一网元。
结合第八方面，在第八方面的第一种可能的实现方式中，第一信息为终端装置发送的非接入层NAS消息。
结合第八方面或第八方面的第一种可能的实现方式，在第八方面的第二种可能的实现方式中，通信单元还用于，接收会话管理功能网元发送的指示信息，指示信息用于指示终端装置建立了本地业务；处理单元具体用于，根据指示信息确定终端装置建立了本地业务。
结合第八方面或第八方面的第一种可能的实现方式，在第八方面的第三种可能的实现方式中，通信单元还用于，接收会话管理功能网元发送的第一网元的信息；处理单元具体用于，根据第一网元的信息确定终端装置建立了本地业务。
结合第八方面或第八方面的第一至第三种可能的实现方式中的任意一种，在第八方面的第四种可能的实现方式中，通信单元还用于，向终端装置发送第一标识，第一标识与第一网元关联。
结合第八方面或第八方面的第一至第四种可能的实现方式中的任意一种，在第二方面的第五种可能的实现方式中，第一网元为本地控制面网元。
第九方面，公开了一种接入移动管理功能网元，包括：通信单元，用于向无线接入网设备发送目标网元的信息以及与目标网元对应的信息类型；处理单元，用于确定终端装置建立了本地业务，向终端装置发送配置更新请求信息；其中，配置更新请求信息用于指示终端装置向无线接入网设备发送第一信息的信息类型，第一信息用于无线接入网设备根据第一信息的信息类型向目标网元发送第一信息；其中，目标网元包括接入移动管理功能网元或本地控制面网元。
结合第九方面，在第九方面的第一种可能的实现方式中，目标网元为接入移动管理功能网元，则目标网元对应的信息类型为第一类型，目标网元为本地控制面网元，则目标网元对应的信息类型为第二类型。
结合第九方面或第九方面的第一种可能的实现方式，在第九方面的第二种可能的实现方式中，第一信息为终端装置发送的非接入层NAS消息。
结合第九方面或第九方面的第一或第二种可能的实现方式，在第九方面的第三种可能的实现方式中，通信单元还用于，接收会话管理功能网元发送的指示信息；处理单元具体用于，根据指示信息确定终端装置建立了本地业务；指示信息用于指示终端装置建立了本地业务。
结合第九方面或第九方面的第一或第二种可能的实现方式，在第九方面的第四种可能的实现方式中，通信单元还用于，接收会话管理功能网元发送的本地控制面网元的信息；处理单元具体用于，根据本地控制面网元的信息确定终端装置建立了本地业务。
第十方面，公开了一种无线接入网设备，包括：通信单元，用于接收接入移动管理功能网元发送的目标网元的信息以及目标网元对应的信息类型，接收终端装置发送的第一信息以及第一信息的信息类型；通信单元还用于，根据第一信息的信息类型向目标网元发送第一信息；目标网元包括接入移动管理功能网元或本地控制面网元。
结合第十方面，在第十方面的第一种可能的实现方式中，目标网元为接入移动管理功能网元，则目标网元对应的信息类型为第一类型，目标网元为本地控制面网元，则目标网元对应的信息类型为第二类型。
结合第十方面或第十方面的第一种可能的实现方式中，在第十方面的第二种可能 的实现方式中，还包括处理单元，处理单元具体用于，根据与所述目标网元所对应的信息类型确定所述目标网元。
结合第十方面或第十方面的第一或第二种可能的实现方式中，在第十方面的第三种可能的实现方式中，第一信息为终端装置发送的非接入层NAS消息。
第十一方面，公开了一种无线接入网设备，包括存储器、处理器及存储在存储器上并可在处理器上运行的程序，处理器执行程序时实现上述第一方面以及第一方面任意一种可能的实现方式、第二方面以及第二方面任意一种可能的实现方式、第三方面以及第三方面任意一种可能的实现方式以及第四方面以及第四方面任意一种可能的实现方式所述的寻址方法。
第十二方面，公开了一种接入移动管理功能网元，包括存储器、处理器及存储在存储器上并可在处理器上运行的程序，处理器执行程序时实现上述第一方面以及第一方面任意一种可能的实现方式、第二方面以及第二方面任意一种可能的实现方式、第三方面以及第三方面任意一种可能的实现方式以及第四方面以及第四方面任意一种可能的实现方式所述的寻址方法。
第十三方面，公开了一种终端装置，包括存储器、处理器及存储在存储器上并可在处理器上运行的程序，处理器执行程序时实现上述第一方面以及第一方面任意一种可能的实现方式、第二方面以及第二方面任意一种可能的实现方式、第三方面以及第三方面任意一种可能的实现方式以及第四方面以及第四方面任意一种可能的实现方式所述的寻址方法。
第十四方面，公开了一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行上述实现上述第一方面以及第一方面任意一种可能的实现方式、第二方面以及第二方面任意一种可能的实现方式、第三方面以及第三方面任意一种可能的实现方式以及第四方面以及第四方面任意一种可能的实现方式所述的寻址方法。
第十五方面，公开了一种计算机程序产品，包括指令，当其在计算机上运行时，使得计算机执行实现上述第一方面以及第一方面任意一种可能的实现方式、第二方面以及第二方面任意一种可能的实现方式、第三方面以及第三方面任意一种可能的实现方式以及第四方面以及第四方面任意一种可能的实现方式所述的寻址方法。
第十六方面，公开了一种无线通信装置，包括：无线通信装置中存储有指令；当无线通信装置在上述第六方面至第八方面所述的装置上运行时，使得装置执行如上述实现上述第一方面以及第一方面任意一种可能的实现方式、第二方面以及第二方面任意一种可能的实现方式、第三方面以及第三方面任意一种可能的实现方式以及第四方面以及第四方面任意一种可能的实现方式所述的寻址方法，无线通信装置为芯片。
附图说明
图1为本发明实施例提供的通信系统的架构图；
图2为本发明实施例提供的通信系统的另一架构图；
图3为本发明实施例提供的通信装置的框架图；
图4为本发明实施例提供的AMF组网的架构图；
图5为本发明实施例提供的寻址方法的流程示意图；
图6为本发明实施例提供的寻址方法的另一流程示意图；
图7为本发明实施例提供的寻址方法的另一流程示意图；
图8为本发明实施例提供的网元间的交互示意图；
图9为本发明实施例提供的配置方法的流程示意图；
图10为本发明实施例提供的寻址方法的另一流程示意图；
图11为本发明实施例提供的寻址方法的另一流程示意图；
图12为本发明实施例提供的寻址方法的另一流程示意图；
图13为本发明实施例提供的寻址方法的另一流程示意图；
图14为本发明实施例提供的另一配置方法的流程示意图；
图15为本发明实施例提供的寻址方法的另一流程示意图；
图16为本发明实施例提供的通信装置的另一框架图；
图17为本发明实施例提供的通信装置的另一框架图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本发明实施例提供了一种通信系统，如图1所示，该通信系统包括终端装置、无线接入网(radio access network，RAN)、用户面功能网元(user plane function，UPF)、接入移动管理功能(mobility management function，AMF)网元、会话管理功能(session management function，SMF)网元以及本地控制面网元。图1所示的通信系统中，控制面与用户面分离，SMF可以部署在控制面，UPF可以灵活地部署在用户面，即下沉部署到网络边缘。在靠近UPF的位置引入本地控制面网元作为本地信令代理，本地控制面网元存储部分终端装置的移动性管理(mobile manage，MM)上下文和会话管理(session manage，SM)上下文，可以执行终端装置的本地寻呼，终端装置的业务请求流程。另外，开放本地控制面网元的本地能力，如，执行定位业务等功能。
RAN：用于实现无线有关的功能；例如，RAN网元包括但不限于eNodeB、无线保真(wireless fidelity，Wi-Fi)接入点、全球微波互联接入(worldwide interoperability for microwave access，WiMAX)基站等。
AMF：负责用户的移动性管理，包括移动状态管理，分配用户临时身份标识，认证和授权用户。
SMF：用于会话管理相关的功能，负责UP网元选择、UP网元重选、网络协议(internet protocol，IP)地址分配、承载的建立、承载的修改、承载的释放，服务质量(quality of service，QoS)，控制。
本地控制面网元：在通信网络中可以部署多个功能相同的本地控制面网元。本地控制面网元可以是一个独立的网元，同时具备移动性管理和会话管理的功能。本地控制面网元从AMF接收终端装置的安全上下文以及移动性管理上下文，以及从SMF接收本地业务相关的会话上下文，本地控制面网元负责本地寻呼，在本地处理终端装置的业务请求，以及本地业务的用户面激活、无线承载的建立。
UPF：可以与SMF建立链路连接，并接受SMF的管理。可以在SMF的管理下建立用户面承载的建立、完成用户面数据的路由转发等功能，如：与终端间建立通道(即用户面传输路径)，在该通道上转发终端和数据网络(data network，DN)之间的数据包；以及负责对终端的数据报文过滤、数据传输/转发、速率控制、生成计费信息等。
终端装置或终端装置：可以是用户设备(user equipment，UE)、接入终端、UE单元、UE站、移动站、移动台、远方站、远程终端、移动设备、UE终端、无线通信设备、UE代理或UE装置等。接入终端可以是蜂窝电话、无绳电话、会话发起协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备、处理设备、车载设备、可穿戴设备，5G网络中的终端或未来演进的公共陆地移动网络(public land mobile network，PLMN)网络中的终端等。此外，终端装置还可以为一种装置，例如终端装置，该终端装置还可以为芯片。
需要说明的是，RAN不感知本地控制面网元的存在，与RAN相连接的网元就是AMF网元，为了方便区分，RAN和本地控制面网元之间的接口可以称为N2’接口。N2’接口主要用于移动管理(mobility management，MM)流程的处理，例如，RAN向本地控制面网元转发终端装置的业务请求消息，或者，本地控制面网元还可以通过N2’接口向RAN发送寻呼消息等。对于RAN来说，从功能上不区分本地控制面网元和AMF。
RAN和AMF之间的接口为N2接口。N2接口主要用于本地控制面网元从AMF接收MM上下文和安全上下文。需要说明的是，如果本地控制面网元无法处理来自RAN的某些信令，则将信令转发给AMF，由AMF处理。
本地控制面网元和UPF之间的接口为N4接口。N4接口主要用于本地控制面网元和UPF之间交互本地业务的会话信息，例如，本地控制面网元处理来自UPF的本地业务的下行数据通知消息。对于UPF来说，从功能上不区分本地控制面网元和SMF。
本地控制面网元和SMF之间的接口为N4’接口。N4’接口主要用于本地控制面网元从SMF接收本地会话的SM上下文。需要说明的是，如果本地控制面网元无法处理来自UPF的某些信令，则将信令转发给SMF，由SMF处理。
参考图2，还可以将本地控制面网元从功能上进一步划分成local AMF和local SMF。与AMF的部署位置相比，local AMF是部署位置更靠近UPF或者RAN的移动性管理网元，Local AMF从AMF接收终端装置的安全上下文以及移动性管理上下文，并负责本地寻呼，以及在本地处理终端装置的业务请求。与SMF的部署位置相比，local SMF是部署位置更靠近UPF或者RAN的会话管理功能网元，Local SMF从SMF接收本地业务相关的会话上下文，Local SMF负责本地业务的会话管理，例如，本地业务的用户面激活，无线承载的建立。需要说明的是，本发明实施例中所述的本地控制面网元还可以是图2中的local AMF，即本地控制面网元只负责移动性管理的功能，而会话管理的功能由local SMF负责。为了方便区分，RAN到AMF之间的接口为上述N2接口，RAN到local AMF之间的接口为上述N2’接口。
RAN到AMF或者本地控制面网元有以下两种路由方式：
第一种、对于终端装置的所有NAS信令，RAN都会发送给本地控制面网元。如果NAS信令需要AMF处理，本地控制面网元则将NAS信令透传到AMF，由AMF处理。如果终端装置通过NAS信令请求建立的是本地业务，本地控制面网元则自己处理NAS信令，不需要转发给AMF。
这种路由方式中，即便终端装置没有发起本地业务，NAS消息也要先路由到本地 控制面网元，给本地控制面网元带来了转发负荷。
第二种、对于终端发起的NAS信令，RAN一开始默认将NAS信令路由到AMF。如果终端装置请求的是本地业务，终端装置的NAS信令需要由本地控制面网元处理，RAN则就需要将NAS消息转发给本地控制面网元。
但是，RAN从功能上不区分本地控制面网元和AMF，即RAN不感知本地控制面网元的存在，RAN接收来自终端装置的NAS消息后无法针对NAS消息进行正确寻址。也就是说，针对一个终端装置的NAS信令，该NAS信令以MEC业务相关的业务请求消息为例说明，RAN无法确定NAS信令路由到AMF还是本地控制面网元，如果RAN将NAS信令路由到AMF，再由AMF将处理之后的信令传递给SMF网元，触发SMF建立UPF与RAN之间的用户面传输路径，将导致信令传输路径过于迂回，业务请求流程时延较长。
本发明实施例提供一种寻址方法，接入移动管理功能网元(如AMF)接收无线接入网设备发送的来自终端装置的第一信息；所述第一信息用于请求为所述终端装置建立本地业务的会话。进而，接入移动管理功能网元可以确定所述终端装置建立了本地业务，并向所述无线接入网设备发送第二信息，所述第二信息包括第一地址，所述第一地址指向第一网元。本发明实施例提供的方法中，接入移动管理功能网元确定终端装置请求了本地业务后，可以向RAN发送本地控制面网元的地址(如本发明实施例所述的第一地址)。后续流程中，当RAN接收终端装置发送的NAS消息(如本发明实施例所述的第三信息)，可以根据本地控制面网元的地址向本地控制面网元发送终端装置的NAS消息。可见，在为终端装置建立MEC业务时，本发明实施例可以通过接入移动管理功能网元的指示，使得无线接入网设备将NAS消息路由至本地控制面网元，避免NAS消息传输路径过于迂回，减少终端装置业务请求流程的时延。
本发明实施例所述的接入移动管理功能网元、无线接入网设备或者终端装置，可以通过图3中的通信装置30来实现。图3所示为本申请实施例提供的通信装置30的硬件结构示意图。该通信装置30包括处理器301，通信线路302，存储器303以及至少一个通信接口(图3中仅是示例性的以包括通信接口304为例进行说明)。
处理器301可以是一个通用中央处理器(central processing unit，CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。
通信线路302可包括一通路，在上述组件之间传送信息。
通信接口304，使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以太网，无线接入网(radio access network，RAN)，无线局域网(wireless local area networks，WLAN)等。
存储器303可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者 能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是独立存在，通过通信线路302与处理器相连接。存储器也可以和处理器集成在一起。
其中，存储器303用于存储执行本申请方案的计算机执行指令，并由处理器301来控制执行。处理器301用于执行存储器303中存储的计算机执行指令，从而实现本申请下述实施例提供的意图处理方法。
可选的，本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，处理器301可以包括一个或多个CPU，例如图3中的CPU0和CPU1。
在具体实现中，作为一种实施例，通信装置30可以包括多个处理器，例如图3中的处理器301和处理器308。这些处理器中的每一个可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
在具体实现中，作为一种实施例，通信装置30还可以包括输出设备305和输入设备306。输出设备305和处理器301通信，可以以多种方式来显示信息。例如，输出设备305可以是液晶显示器(liquid crystal display，LCD)，发光二级管(light emitting diode，LED)显示设备，阴极射线管(cathode ray tube，CRT)显示设备，或投影仪(projector)等。输入设备306和处理器301通信，可以以多种方式接收用户的输入。例如，输入设备306可以是鼠标、键盘、触摸屏设备或传感设备等。
上述的通信装置30可以是一个通用设备或者是一个专用设备。在具体实现中，通信装置30可以是台式机、便携式电脑、网络服务器、掌上电脑(personal digital assistant，PDA)、移动手机、平板电脑、无线终端装置、嵌入式设备或有图3中类似结构的设备。本申请实施例不限定通信装置30的类型。
一种可能的实现中，当通信装置30作为本发明实施例所述的无线接入网设备时，通信装置30的处理器301通过运行或执行存储在存储器303内的软件程序和/或模块，以及调用存储在存储器303内的数据，执行如下功能：
向接入移动管理功能网元发送来自终端装置的第一信息；所述第一信息用于请求为所述终端装置建立本地业务的会话。另外，接收所述接入移动管理功能网元发送的第二信息，所述第二信息包括第一地址，所述第一地址指向第一网元。所述无线接入网设备还可以接收所述终端装置发送的所述第三信息，并根据所述第一地址向所述第一网元发送所述第三信息。
或者，接收接入移动管理功能网元发送的目标网元的信息以及目标网元对应的信息类型。另外，还支持无线接入网设备接收终端装置发送的第一信息以及所述第一信息的信息类型，进一步，无线接入网设备可以根据所述第一信息的信息类型向目标网元所述第一信息；所述目标网元包括所述接入移动管理功能网元或本地控制面网元。
一种可能的实现中，当通信装置30作为本发明实施例所述的接入移动管理功能网元时，处理器301通过运行或执行存储在存储器303内的软件程序和/或模块，以及调用存储在存储器303内的数据，执行如下功能：
接收无线接入网设备发送的来自终端装置的第一信息；所述第一信息用于请求为所述终端装置建立本地业务的会话务。接入移动管理功能网元可以确定所述终端装置建立了本地业务，进一步，还支持接入移动管理功能网元向所述无线接入网设备发送第二信息，所述第二信息包括第一地址，所述第一地址指向第一网元。
或者，支持接入移动管理功能网元向无线接入网设备发送目标网元的信息以及目标网元对应的信息类型。当接入移动管理功能网元确定终端装置建立了本地业务，支持接入移动管理功能网元向所述终端装置发送配置更新请求信息。所述配置更新请求信息用于指示所述终端装置向无线接入网设备发送第一信息的信息类型，第一信息用于所述无线接入网设备根据所述第一信息的信息类型向目标网元发送所述第一信息；其中，所述目标网元包括所述接入移动管理功能网元或本地控制面网元。
为方便理解，在此对本发明实施例涉及的术语进行解释说明：
(1)5G全局唯一的临时UE标识(5G Globally Unique Temporary UE Identity，5G-GUTI)
具体地，5G-GUTI包括GUAMI、(5G-TMSI)。其中，全局唯一AMF标识(globally unique AMF identifier，GUAMI)，用于唯一标识一个AMF网元。该标识可以包括移动国家码(mobile country code，MCC)、移动网络码(mobile network code，MNC)、AMF Region ID、AMF Set ID、AMF pointer。
MCC：可以是3位数字，如中国的MCC为460。
MNC：可以是2位或者3位数字，用于识别终端装置归属的公共陆地移动网络(public land mobile network，PLMN)。例如，移动网络的MNC码可以为00、01、02或者03。
AMF Region ID：用于标识AMF Region。其中，AMF Region由一个或多个AMF Sets组成。AMF Region ID。
AMF Set ID：用于唯一标识在AMF Region内的一个AMF set，AMF Set由多个AMF组成，这些AMF服务于一个特定的区域和网络切片。
AMF Pointer：用于标识在AMF set内的一个或者多个AMF网元。
(2)AMF组网
具体地，一个AMF Region(区域)可以包括多个AMF set，一个AMF set(集)可以包括多个AMF。RAN可以和每个AMF Region中的任意一个AMF之间存在N2接口，并通过N2接口进行通信。
图4是AMF组网的一种示例，参考图4，一个AMF Region包括两个AMF set，分别为AMF set-1和AMF set-2。其中，AMF set-1包括两个AMF，分别为AMF-1和AMF-2。AMF set-2包括两个AMF网元，分别为AMF-3和AMF-4。另外，RAN-1与AMF set-1和AMF set-2内任一AMF之间都可以通过N2接口进行通信；RAN-2与AMF set-1和AMF set-2内任一AMF之间都可以N2接口进行通信。
(3)GUAMI列表
GUAMI用于唯一标识一个AMF网元，一个AMF网元可以有多个用于标识该AMF的GUAMI，这些GUAMI组成GUAMI列表，换句话说，GUAMI列表用于标识一个AMF的所有GUAMI集合，或者说，GUAMI列表用于表示该AMF支持的GUAMI集 合。示例的，某个AMF支持的GUAMI列表包括GUAMI-1和GUAMI-2，其中，
GUAMI-1＝<MCC><MNC><AMF Region ID><AMF Set ID><AMF Pointer-1>；
GUAMI-2＝<MCC><MNC><AMF Region ID><AMF Set ID><AMF Pointer-2>；
GUAMI-1、GUAMI-2是不同的标识，但是如果GUAMI-1里面包含的AMF Pointer-1和GUAMI-2里面包含的AMF Pointer-2都是指向同一个AMF的，那么GUAMI-1、GUAMI-2也是指向同一个AMF的。即，GUAMI-1、GUAMI-2可以用来标识同一个AMF。
(4)传输网络层(transport network layer，TNL)association
TNL association用于AMF和RAN建立设备级的链接或者UE粒度的下一代应用层协议(Next Generation Application Protocol，NGAP)链接。其中，设备级的连接指的是在AMF和RAN之间的N2接口上的某一个TNL association上传输与UE无关的数据，例如AMF的能力参数，或者RAN的能力参数。UE粒度的NGAP链接是在AMF和RAN之间的N2接口上的某一个TNL association上传递UE特有的参数，即将该UE的NGAP链接跟一个TNL association绑定起来(NGAP UE-TNLA-binding)。不同UE的NGAP链接可以跟同一个TNL association绑定，或者，跟不同的TNL association绑定。
AMF可以通过更新与UE的NGAP链接绑定的TNL association来更新NGAP UE-TNLA-binding。例如，AMF上存储的NGAP UE-TNLA-binding-1包含UE的NGAP链接与TNL association-1绑定的关系，如果AMF将该UE的NGAP链接与TNL association-1绑定更新为该UE的NGAP链接与TNL association-2绑定，那么AMF存储的NGAP UE-TNLA-binding-1就更新为NGAP UE-TNLA-binding-2，NGAP UE-TNLA-binding-2包含UE的NGAP链接与TNL association-2绑定的关系。
为了在N2接口上的某一个TNL association传递消息时标识不同的UE，RAN会为UE分配RAN UE NGAP ID，其中，RAN UE NGAP ID用于RAN在N2接口上唯一标识一个UE，AMF会为UE分配AMF UE NGAP ID，其中，AMF UE NGAP ID用于AMF在N2接口上唯一标识一个UE。
综上所述，AMF跟RAN可以通过某一个TNL association传递网元设备粒度的参数或者网络能力，或者，AMF跟RAN可以通过某一个TNL association传递UE粒度的参数。
TNL association和GUAMI存在对应关系，例如，GUAMI-1对应的TNL Association为：TNL association Address-1；GUAMI-2对应的TNL association为：TNL association Address-2。其中，TNL association Address-1和TNL association Address-2都是可以指向同一个AMF的地址信息。
下面将结合附图对本申请实施例提供的方案进行具体阐述。
需要说明的是，本申请下述实施例中各个设备之间的消息名字或消息中各参数的名字等只是一个示例，具体实现中也可以是其他的名字，本申请实施例对此不作具体限定。
本发明实施例提供一种寻址方法，如图5所示，所述方法包括以下步骤：
501、终端装置向无线接入网设备发送第一信息，所述第一信息用于请求为所述终 端装置建立本地业务的会话。
本发明实施例中，当终端装置请求建立业务时，终端装置可以向无线接入网设备发送NAS消息，请求为终端装置建立本地业务的会话。例如，终端装置向无线接入网设备发送第一信息，请求为终端装置建立本地业务的会话。
具体实现中，第一信息可以是会话建立请求消息中携带的信息，该会话建立请求消息用于请求核心网为终端装置建立本地业务的协议数据单元(protocol data unit，PDU)会话。也就是说，第一信息请求建立的PDU会话与本地业务关联。
另外，本发明实施例所述的本地业务可以理解为MEC业务、本地数据网络(local area data network，LADN)业务，或者，本地控制面网元可以在本地处理的业务，例如，本地寻呼业务、本地业务的用户面激活、本地业务无线承载的建立。
502、无线接入网设备向接入移动管理功能网元发送所述第一信息。
需要说明的是，无线接入网设备不能确定终端请求的是不是本地业务，进而也不能确定将所述第一信息路由到本地控制面网元还是接入移动管理功能网元，会默认将终端装置的第一信息路由到接入移动管理功能网元。
具体实现中，无线接入网设备可以通过与接入移动管理功能网元之间的N2接口向接入移动管理功能网元发送所述第一信息。
503、接入移动管理功能网元接收所述第一信息，确定所述终端装置建立了本地业务。
需要说明的是，本发明实施例中所述的本地业务可以是MEC业务。
另外，接入移动管理功能网元接收来自终端装置的第一信息后，可以判断终端装置是否建立了本地业务。如果终端装置建立了本地业务，且后续终端装置处于连接态，可以向无线接入网设备发送NAS消息请求建立本地业务。进而，接入移动管理功能网元则可以指示无线接入网设备将终端装置在后续发送的NAS消息路由至本地控制面网元，减少终端装置本地业务处理的时延，以便更快速地为终端装置建立本地业务。
具体实现中，接入移动管理功能网元可以通过以下两种方式确定终端装置建立了本地业务：
第一种、会话管理功能网元确定终端装置建立了本地业务之后，可以通过指示信息通知接入移动管理功能网元，终端装置设备已经建立了本地业务。
例如，在步骤501中，接入移动管理功能网元从无线接入网设备接收终端装置发送的会话建立请求消息之后，将该会话建立请求消息转发至会话管理功能网元。会话管理功能网元可以根据该会话建立请求消息中携带的数据网络名称(data network name，DNN)、单个网络切片选择辅助信息(Single Network Slice Selection Assistance Information，S-NSSAI)以及终端装置当前所在的位置信息等参数确定该会话建立请求消息所请求的PDU会话与本地业务关联，也就可以确定终端装置建立了本地业务。进而会话管理功能网元可以向接入移动管理功能网元发送指示信息，用于指示“终端装置建立了本地业务”。那么接入移动管理功能网元接收会话管理功能网元发送的指示信息，所述指示信息用于指示所述终端装置建立了本地业务。进而，接入移动管理功能网元根据所述指示信息确定所述终端装置建立了本地业务。
示例的，或者，会话管理网元确定终端装置通过第一信息请求的是本地业务之后， 可以向接入移动管理功能网元发送特定的指示信息指示接入移动管理功能网元，终端装置已经建立了本地业务。其中，该指示信息可以是会话管理功能网元和接入移动管理功能网元预先约定好的。例如，预先约定的指示信息为“0100”，当会话管理功能网元向接入移动管理功能网元发送“0100”，接入移动管理功能网元就可以确定终端装置建立了本地业务。
第二种、会话管理功能网元确定终端装置建立了本地业务之后，可以向接入移动管理功能网元发送本地控制面网元的信息，指示接入移动管理功能网元终端装置设备已经建立了本地业务。
例如，步骤501中，接入移动管理功能网元从无线接入网设备接收终端装置发送的会话建立请求消息之后，将该会话建立请求消息转发至会话管理功能网元。会话管理功能网元可以根据该会话建立请求消息中携带的DNN、S-NSSAI以及终端装置当前所在的位置信息等参数确定该会话建立请求消息请求建立的PDU会话与本地业务关联。进一步地，会话管理功能网元选择一个本地控制面网元，并向接入移动管理功能网元发送第一网元的信息；其中，第一网元可以是本地控制面网元，以指示“终端装置建立了本地业务”。接入移动管理功能网元接收会话管理功能网元发送的所述第一网元的信息，根据所述第一网元的信息确定所述终端装置建立了本地业务。具体实现中，第一网元的信息可以是第一网元的标识，如，第一网元的信息为本地控制面网元的标识信息。
示例的，会话管理功能网元根据上述DNN、S-NSSAI或位置信息等参数确定终端装置通过第一信息请求的是本地业务之后，会话管理功能网元还可以向网络存储功能(network repository function，NRF)网元请求本地控制面网元的信息，并将NRF返回的本地控制面网元的信息传递给接入移动管理功能网元，通过“本地面网元的信息”来指示接入移动管理功能网元终端装置已经建立了本地业务。
504、接入移动管理功能网元向无线接入网设备发送第二信息，所述第二信息包括第一地址，所述第一地址指向第一网元。
其中，所述第一地址可以是本地控制面网元的地址。接入移动管理功能网元确定终端装置建立了本地业务之后，可以向无线接入网设备发送本地控制面网元的地址，指示无线接入网设备将终端装置在后续发送的NAS消息路由至本地控制面网元，减少终端装置本地业务处理的时延，以便更快速地为终端装置建立本地业务。
例如，通过第二信息指示无线接入网设备将终端装置在第一信息之后发送的第三信息路由至本地控制面网元。
具体实现中，接入移动管理功能网元向无线接入网设备发送的第二信息可以是N2请求消息中携带的信息，触发无线接入网设备进行重定向(redirection)，即更新UE粒度的NGAP链接与TNL association的绑定关系(NGAP UE-TNLA-binding)。一种可能的实现方式中，第二信息携带终端装置对应的TNL association，该TNL association对应的是第一网元的地址信息。例如，第二信息中可以包括是本地控制面网元的地址信息，无线接入网设备可以根据本地控制面网元的地址信息更新NGAP UE-TNLA-binding。
505、无线接入网设备接收终端装置发送的第三信息，向所述第一网元发送所述第 三信息。
具体地，由于第一地址指向第一网元，无线接入网设备则可以确定向第一网元发送第三信息。
当终端装置再次向无线接入网设备发送NAS消息，该NAS消息携带所述第三信息，第三信息与第一信息的功能可以相同，均用于请求为所述终端装置建立本地业务的会话。无线接入网设备可以根据第一地址向第一网元发送第三信息。本发明实施例提供的方法，接入移动管理功能网元在终端装置建立本地业务之后，可以指示无线接入网设备将终端装置后续发送的NAS消息路由至本地控制面网元，减少终端装置本地业务处理的时延，以便更快速地为终端装置建立本地业务。
可选的，图5所示的方法还包括：无线接入网设备接收接入移动管理功能网元发送的第二信息后，还可以修改NGAP UE-TNLA-binding为无线接入网设备重定向NAS消息提供基础。
例如，修改前的对应关系如下：
GUAMI-1对应的TNL association为：Address-1；GUAMI-2对应的TNL association为：Address-2；其中，Address-1、Address-2均指向所述接入移动管理功能网元。
修改后的对应关系如下：
GUAMI-1对应的TNL association为：Address-1；GUAMI-2对应的TNL association为：Address-3；其中，Address-1指向所述接入移动管理功能网元，Address-3可以是本地控制面网元的地址信息，指向本地控制面。
无线接入网设备还可以将修改后的对应关系保存在所述终端装置的上下文中。后续如果终端装置处于连接态，无线接入网设备接收到终端装置NAS消息时，根据上下文中对应的寻址到本地控制面。
可选的，图5所示的方法还包括：接入移动管理功能网元还可以向无线接入网设备发送GUAMI列表实现无线接入网设备对处于空闲状态的终端装置发送的NAS消息的寻址。
例如，AMF支持的GUAMI列表包括GUAMI-1和GUAMI-2。其中，GUAMI-1＝<MCC><MNC><AMF Region ID><AMF Set ID><AMF Pointer-1>；GUAMI-2＝<MCC><MNC><AMF Region ID><AMF Set ID><AMF Pointer-2>。
需要说明的是，GUAMI-1和GUAMI-2包括的AMF Pointer的不同，其中，AMF Pointer-1指向第一网元，即与第一网元关联，第一网元可以为本地控制网元；AMF Pointer-2指向第二网元，第二网元可以为AMF。
一种可能的实现方式中，接入移动管理功能网元可以为终端装置分配和本地控制面网元关联的GUAMI，使得无线接入网设备可以根据该GUAMI将处于空闲状态的终端装置发送的NAS消息路由到本地控制面网元。例如，接入移动管理功能网元向所述终端装置发送第一标识，所述第一标识与所述第一网元关联。示例的，所述第一标识可以是上述GUAMI-1。
本发明实施例中，接入移动管理功能网元向终端装置发送第一标识，当终端装置处于空闲态，将NAS消息和所述第一标识发送给无线接入网设备，无线接入网设备可以根据第一标识将来自终端装置的NAS消息发送给和第一标识关联的第一网元。
本发明实施例提供一种寻址方法，如图6所示，所述方法包括以下步骤：
601、接入移动管理功能网元向无线接入网设备发送目标网元的信息以及目标网元对应的信息类型。
其中，当目标网元为所述接入移动管理功能网元，目标网元对应的信息类型为第一类型；当目标网元为所述本地控制面网元，目标网元对应的信息类型为第二类型。可以理解的是，如果终端装置的NAS消息需要路由到远端的接入移动管理功能网元，由接入移动管理功能网元处理，则NAS消息为第一类型的消息；如果终端装置请求的是本地业务，终端装置的NAS消息需要路由到本地控制面网元进行处理，则NAS消息为第二类型的消息。
具体实现中，接入移动管理功能网元可以在步骤601之前向无线接入网设备发送接入移动管理功能网元支持的GUAMI列表。其中，GUAMI列表包括GUAMI-1。在步骤601中，接入移动管理功能网元可以向无线接入网设备发送GUAMI和TNL association的对应关系。例如，如果信息类型第一类型，那么GUAMI-1对应的TNL association为：address-1；如果信息类型是第二类型，那么GUAMI-1对应的TNL association为：address-2。address-1可以是接入移动管理功能网元的地址信息，指向接入移动管理功能网元；address-2可以是本地控制面网元的地址信息，指向本地控制面网元。
602、无线接入网设备接收接入移动管理功能网元发送的目标网元的信息以及目标网元对应的信息类型。
具体实现中，无线接入网设备可以通过和接入移动管理功能网元之间的N2接口接收接入移动管理功能网元发送的目标网元的信息以及目标网元对应的信息类型。
603、所述接入移动管理功能网元确定终端装置建立了本地业务，向所述终端装置发送配置更新请求信息；所述配置更新请求信息用于指示所述终端装置向无线接入网设备发送第一信息的信息类型。
需要说明的是，所述第一信息可以是所述终端装置发送的NAS消息中携带的信息。
具体实现中，接入移动管理功能网元可以通过以下两种方式确定终端装置建立了本地业务：
第一种、会话管理功能网元确定终端装置建立了本地业务之后，可以通过指示信息通知接入移动管理功能网元，终端装置设备已经建立了本地业务。
例如，在步骤501中，接入移动管理功能网元从无线接入网设备接收终端装置发送的会话建立请求消息之后，将该会话建立请求消息转发至会话管理功能网元。会话管理功能网元可以根据该会话建立请求消息中携带的数据网络名称(data network name，DNN)、单个网络切片选择辅助信息(Single Network Slice Selection Assistance Information，S-NSSAI)以及终端装置当前所在的位置信息等参数确定该会话建立请求消息所请求的PDU会话与本地业务关联，也就可以确定终端装置建立了本地业务。进而会话管理功能网元可以向接入移动管理功能网元发送指示信息，用于指示“终端装置建立了本地业务”。那么接入移动管理功能网元接收会话管理功能网元发送的指示信息，所述指示信息用于指示所述终端装置建立了本地业务。进而，接入移动管理功能网元根据所述指示信息确定所述终端装置建立了本地业务。
示例的，或者，会话管理网元确定终端装置通过第一信息请求的是本地业务之后，可以向接入移动管理功能网元发送特定的指示信息指示接入移动管理功能网元，终端装置已经建立了本地业务。其中，该指示信息可以是会话管理功能网元和接入移动管理功能网元预先约定好的。例如，预先约定的指示信息为“0100”，当会话管理功能网元向接入移动管理功能网元发送“0100”，接入移动管理功能网元就可以确定终端装置建立了本地业务。
第二种、会话管理功能网元确定终端装置建立了本地业务之后，可以向接入移动管理功能网元发送本地控制面网元的信息，指示接入移动管理功能网元终端装置设备已经建立了本地业务。
例如，步骤501中，接入移动管理功能网元从无线接入网设备接收终端装置发送的会话建立请求消息之后，将该会话建立请求消息转发至会话管理功能网元。会话管理功能网元可以根据该会话建立请求消息中携带的DNN、S-NSSAI以及终端装置当前所在的位置信息等参数确定该会话建立请求消息请求建立的PDU会话与本地业务关联。进一步地，会话管理功能网元选择一个本地控制面网元，并向接入移动管理功能网元发送第一网元的信息；其中，第一网元可以是本地控制面网元，以指示“终端装置建立了本地业务”。接入移动管理功能网元接收会话管理功能网元发送的所述第一网元的信息，根据所述第一网元的信息确定所述终端装置建立了本地业务。具体实现中，第一网元的信息可以是第一网元的标识，如，第一网元的信息为本地控制面网元的标识信息。
示例的，会话管理功能网元可以根据其他参数确定终端装置通过第一信息请求的是本地业务。会话管理功能网元还可以向网络存储功能(network repository function，NRF)网元请求本地控制面网元的信息，并将NRF返回的本地控制面网元的信息传递给接入移动管理功能网元，指示接入移动管理功能网元终端装置已经建立了本地业务。
604、终端装置向无线接入网设备发送第一信息以及所述第一信息的信息类型。
需要说明的是，终端装置可以通过无线资源控制(radio resource control，RRC)消息向无线接入网设备发送第一信息的信息类型。
605、所述无线接入网设备接收终端装置发送的第一信息以及所述第一信息的信息类型，根据所述第一信息的信息类型向目标网元发送所述第一信息。所述目标网元包括所述接入移动管理功能网元或本地控制面网元。
具体实现中，无线接入网设备可以根据与所述目标网元所对应的信息类型确定所述目标网元。示例的，第一信息为第一类型的消息，无线接入网设备则可以将第一信息发送给接入移动管理功能网元，第一信息为第二类型的消息，无线接入网设备则可以将第一信息发送给本地控制面网元。
本发明实施例提供中，接入移动管理功能网元(如AMF)预先向无线接入网设备配置的目标网元的信息以及目标网元对应的信息类型，并指示终端装置将NAS消息以及NAS消息的类型发送给无线接入网设备。进而，无线接入网设备可以根据终端装置发送的NAS消息以及信息类型，正确路由NAS消息。当终端装置请求了本地业务，终端装置的NAS消息可以由本地控制面网元处理，为终端装置建立本地业务。可见，本发明实施例提供的方法中，通过接入移动管理功能网元的指示，使得无线接入网设 备实现NAS消息的正确路由，减少终端装置本地业务处理的时延，以便更快速地为终端装置建立本地业务。
本发明实施例还提供一种寻址方法，应用于图1所示的通信系统中，能够实现终端装置的NAS消息的正确路由。其中，终端装置为UE，无线接入网设备为RAN，接入移动管理功能网元为AMF，会话管理功能网元为SMF。如图7所示，所述方法包括以下步骤：
701、AMF向RAN配置GUAMI和TNL association的对应关系。
当本地控制面网元部署在AMF的服务范围内，AMF支持的GUAMI可以指向本地控制面网元。具体地，AMF可以支持多个pointer，也就支持多个GUAMI。多个GUAMI可以分别指向AMF和本地控制面网元。例如，AMF支持GUAMI-1和GUAMI-2。其中，GUAMI-1包括Pointer-1，GUAMI-1对应的TNL association可以为AMF的地址信息，即GUAMI-1和AMF关联。GUAMI-2包括Pointer-2，GUAMI-2对应的TNL association可以为本地控制面网元的地址信息，即GUAMI-2和本地控制面网元关联。
示例的，如图8所示，RAN-1属于该本地控制面网元的服务范围，即，RAN-1可以通过N2接口和AMF交互，也可以通过N2’接口和本地控制面网元交互。但是本地控制面网元的服务范围有限，RAN-2不属于该本地控制面网元的服务范围，因此，RAN-2只能通过N2接口跟AMF交互。
具体实现中，AMF可以参考图9所示的流程向RAN配置GUAMI和TNL association(TNL关联)的对应关系。具体包括以下步骤：
步骤0、AMF配置本地控制面网元的服务区域(trace area，TA)列表。
其中，TA列表用于描述本地控制面网元支持的服务区域。
步骤1、RAN向AMF发起NG setup(安装)流程，NG setup procedure的目的是交换RAN和AMF所需的应用数据，以便RAN和AMF之间能够进行信令交互。该过程应是TNLA(transport network layer association)触发的第一个NGAP程序，该过程使用非UE相关信令。RAN向AMF发送NG setup request消息，携带RAN的标识信息以及支持的TA列表等等参数。其中，RAN的标识信息可以是global RAN node ID。
步骤2、AMF向RAN返回NG setup response消息，携带该AMF支持的GUAMI列表。
例如，AMF支持的GUAMI列表包括GUAMI-1和GUAMI-2，其中，
GUAMI-1＝<MCC><MNC><AMF Region ID><AMF Set ID><AMF Pointer-1>；
GUAMI-2＝<MCC><MNC><AMF Region ID><AMF Set ID><AMF Pointer-2>；
需要说明的是，GUAMI-1和GUAMI-2包括的AMF Pointer不同，但是AMF Pointer-1和AMF Pointer-2都可以指向该AMF。
步骤3A、如果AMF根据RAN的TA确定RAN位于本地控制面的服务范围，同时发起AMF configuration update(AMF配置更新)流程，向RAN发送该AMF支持的GUAMI对应的TNL association信息。其中，GUAMI-1对应的TNL association为：TNL association address-1；GUAMI-2对应的TNL association为：本地控制面TNL Association address-2。
需要说明的是，TNL association address-1是可以指向AMF的地址信息，本地控 制面TNL association address-2是可以指向本地控制面的地址信息。
步骤3B、如果AMF根据RAN的TA确定该RAN不位于本地控制面的服务范围，同时发起AMF configuration update流程，向RAN发送AMF支持的GUAMI对应的TNL association信息，其中，GUAMI-1＝<MCC><MNC><AMF Region ID><AMF Set ID><AMF Pointer-1>，GUAMI-2:＝<MCC><MNC><AMF Region ID><AMF Set ID><AMF Pointer-2>。
需要说明的是，GUAMI-1和GUAMI-2的不同之处在于AMF Pointer的不同，但是AMF Pointer-1和AMF Pointer-2都是指向同一个AMF的。
步骤4、RAN向AMF返回configuration update acknowledge(配置更新确认)消息。
执行完上述步骤0～步骤4之后，RAN已经获取到了GUAMI和TNL association的对应关系。当UE建立本地业务之后，AMF就可以更新UE的TNL association，触发RAN进行对终端装置的NAS消息进行重定向。
702、UE发起注册流程。
如果与UE连接的RAN位于本地控制面网元的服务范围内，但由于AMF不知道UE是否会发起本地业务请求，AMF在该步骤中为UE分配的临时标识为5G-GUTI-1。其中，5G-GUTI-1包括GUAMI-1，GUAMI-1包括AMF pointer-1，AMF pointer-1对应的TNL association可以为AMF的地址信息。因此，RAN可以根据AMF pointer-1对应的TNL association建立与AMF之间的UE粒度的NGAP链接。
同时，AMF本地存储UE的移动性管理上下文，包括UE的临时标识5G-GUTI-1、永久标识，以及RAN UE NGAP ID，AMF UE NGAP ID。其中，RAN UE NGAP ID用于唯一标识一个UE和RAN之间的NGAP连接，AMF UE NGAP ID用于唯一标识一个UE和AMF之间的NGAP连接。
703、UE向AMF发起会话建立请求。
具体地，UE的会话建立请求携带会话标识，DNN以及S-NSSAI。
AMF收到UE的会话建立请求之后，可以调用SMF的服务(Nsmf_PDU Session_Create SM Context Request)，即向SMF发送Nsmf_PDU Session_Create SM Context Request消息，触发SMF创建会话上下文。另外，SMF还可以判断终端装置本次会话建立请求的是本地业务，例如，SMF可以根据UE的位置信息、DNN或S-NSSAI确定本次请求的是本地业务。
704、SMF向NRF请求本地控制面网元的标识。
具体地，SMF可以调用Nnrf_NF Discovery_Request请求本地控制面网元的标识，即SMF可以向NRF发送Nnrf_NF Discovery_Request消息。例如，Nnrf_NF Discovery_Request请求携带UE的位置信息(User location information)以及请求的网元类型，NRF可以根据UE的位置信息和请求的网元类型确定本地面控制网元的标识，向SMF返回本地控制面网元的标识。这里的本地控制面网元可以是图1所示通信网络中的控制面网元。
705、SMF发起N4会话建立流程。
706、SMF将本地控制面网元的标识传递给AMF。
具体实现中，SMF可以通过Namf_Communication_N1N2MessageTransfer服务，将本地控制面网元的标识传递给AMF。
707、AMF网元获知本地控制面网元的标识之后，将移动性管理上下文和安全上下文传递给本地控制面网元。
其中，移动性管理上下文包括UE的临时标识5G-GUTI-1、永久标识，以及RANUE NGAP ID，AMF UE NGAP ID。
708、AMF向RAN发送N2请求消息。
709、RAN跟UE之间进行RRC连接配置(Connection Reconfiguration)。
710、RAN返回N2会话响应消息。
711、会话建立流程中的其他步骤。
712、SMF向本地控制面网元发送本地业务对应的会话管理上下文。
会话管理上下文可以是N3接口的用户面隧道信息，QoS信息等。
713、AMF向RAN发送N2消息，触发RAN更新NGAP UE-TNLA-binding。
由于步骤707中，AMF获取到本地控制面网元的标识，可以根据地控制面网元的标识确定该UE建立了本地业务对应的会话。AMF则可以向RAN发送N2消息触发RAN对后续对来自该终端装置的NAS消息进行重定向。所述N2消息即本发明实施例所述的第二信息。
一种可能的实现方式中，所述N2消息携带该UE对应的TNL association，该TNL association对应的是本地控制面网元的地址信息。
另外，RAN接收到所述N2消息后，将其中的TNL association保存到上下文中。如果UE处于连接态，后续RAN从连接态的UE接收到NAS消息时，RAN可以根据该UE的上下文中的TNL association，寻址到本地控制面。
再者，由于RAN UE NGAP ID，AMF UE NGAP ID分别用于RAN和AMF在NGAP连接上唯一标识一个UE，且本地控制面已经获取到了RAN UE NGAP ID和AMF UE NGAP ID，所以本地控制面网元后续接收到RAN发送的NAS消息、RAN UE NGAP ID和AMF UE NGAP ID时，可以根据RAN UE NGAP ID和AMF UE NGAP ID在上下文中确定UE的永久标识。
714、AMF为UE分配新的5G-GUTI。
具体实现中，向UE发送UE configuration update command，UE configuration update command中携带为UE新分配的5G-GUTI，例如，5G-GUTI-2。
其中，5G-GUTI-2包括GUAMI-2，GUAMI-2包括AMF pointer-2，AMF pointer-2对应的TNL association可以为本地控制面网元的地址信息。因此，RAN可以根据AMFpointer-2对应的TNL association建立与本地控制面网元之间的UE粒度的NGAP链接。
如此，当UE处于空闲态，RAN本地存储的UE的上下文已经被释放，UE向RAN发送NAS消息时，还可以发送新分配5G-GUTI中的GUAMI，例如，GUAMI-2。RAN可以根据GUAMI-2对应的TNL association建立与本地控制面网元之间的UE粒度的NGAP链接，将终端装置的NAS消息路由到本地控制面网元。
图7所示方法中，当UE建立本地业务时，AMF可以从SMF获取本地控制面网元的标识，并更新UE粒度的NGAP连接对应的TNL association，即更新NGAP  UE-TNLA-binding，触发RAN将终端装置后续发送的NAS消息路由至本地控制面网元。
针对图2所示的通信系统，本发明实施例还提供一种寻址方法，如图10所示，所述方法包括以下步骤：
1001、UE发起注册流程。
当本地控制面网元部署在AMF的服务范围内，AMF支持的GUAMI可以指向本地控制面网元。具体地，AMF可以支持多个pointer，也就支持多个GUAMI。多个GUAMI可以分别指向AMF和本地控制面网元。例如，AMF支持GUAMI-1和GUAMI-2。其中，GUAMI-1包括Pointer-1，GUAMI-1对应的TNL association可以为AMF的地址信息，即GUAMI-1和AMF关联。GUAMI-2包括Pointer-2，GUAMI-2对应的TNL association可以为本地控制面网元的地址信息，即GUAMI-2和本地控制面网元关联。
同时，AMF本地存储UE的移动性管理上下文，包括UE的临时标识5G-GUTI-1、永久标识、RAN UE NGAP ID以及AMF UE NGAP ID。
1002、UE发起会话建立请求，携带会话标识，DNN以及S-NSSAI。
1003、AMF收到UE的注册请求消息之后，触发SMF创建会话上下文。
具体地，AMF可以调用SMF的服务Nsmf_PDU Session_Create SM Context Request，触发SMF创建会话上下文。另外，SMF还可以根据根据UE的位置信息、DNN或S-NSSAI确定本次会话建立请求所请求的是本地业务。
1004、SMF发起N4会话建立流程。
1005、SMF指示AMF：本次会话是为UE的本地业务发起的。
具体实现中，SMF通过Namf_Communication_N1N2 Message Transfer服务，向AMF发送本地控制面网元的信息，通过本地控制面网元的信息指示AMF本次会话是为UE的本地业务发起的。
一种可能的实现方式中，SMF也可以仅向AMF发送指示信息，指示本次会话是为UE的本地业务发起的，同时AMF需要为UE的本地业务选择本地控制面网元。
1006、AMF收到SMF发送的指示信息之后，执行local(本地)AMF跟local SMF的选择过程。
具体实现中，AMF可以通过以下两种方式选择local AMF和local SMF：
第一种、AMF向NRF请求local AMF、local SMF的标识。
具体地，AMF调用Nnrf_NF Discovery_Request，即AMF可以向NRF发送Nnrf_NF Discovery_Request消息。该消息携带UE的位置信息以及请求的网元类型，NRF可以根据UE的位置信息以及请求的网元类型确定local AMF和local SMF。进而NRF可以向AMF返回local AMF ID和local SMF ID。
第二种、AMF配置了local AMF ID、local SMF ID跟位置关系的绑定关系，AMF可以根据UE的位置信息选择local AMF和local SMF。
以上两种方式仅仅作为示例，AMF也可以通过其他方式选择local AMF和local SMF方法，本发明实施例对此不做限定。
需要说明的是，AMF执行local AMF跟local SMF的选择过程之后，AMF将移动性管理上下文和安全上下文传递给local AMF。其中，移动性管理上下文包括UE的临 时标识5G-GUTI-1、永久标识、RAN UE NGAP ID、AMF UE NGAP ID，以及local SMF的标识。需要说明的是，请求local AMF的标识是为了让local AMF处理移动管理功能。另外，请求local SMF的标识，是为了local AMF处理完移动管理功能之后，local SMF可以处理会话管理功能。
1007、AMF向RAN发送N2请求消息。
1008、RAN跟UE之间进行RRC Connection Reconfiguration(RRC连接重配置)。
1009、RAN返回N2响应消息。
1010、AMF向SMF发送local SMF的标识。
具体实现中，调用SMF的服务Nsmf_PDU Session_Update SM Context Request，AMF发送的消息中携带local SMF的标识，以便SMF可以将一部分上下文传递给local SMF，local SMF可以根据SMF传递的上下文处理会话管理功能。
此外，还可以执行会话建立流程中的其他步骤，直至会话建立流程结束，本发明对此不作说明。
1011、SMF向local SMF发送本地业务对应的会话管理上下文。
其中，本地业务对应的会话管理上下文可以包括N3接口的用户面隧道信息、服务质量(quality of service，QoS)等。
1012、AMF触发RAN更新NGAP UE-TNLA-binding(UE粒度的NGAP和TNLA绑定关系)。
由于AMF在此之前已经获取到本地控制面网元的标识，可以根据地控制面网元的标识确定该UE建立了本地业务对应的会话。AMF则可以向RAN发送N2消息触发RAN对后续对来自该终端装置的NAS消息进行重定向。所述N2消息即本发明实施例所述的第二信息。
一种可能的实现方式中，所述N2消息携带该UE对应的TNL association，该TNL association对应的是local AMF的地址信息。
另外，RAN接收到所述N2消息后，将其中的TNL association保存到上下文中。如果UE处于连接态，后续RAN从连接态的UE接收到NAS消息时，RAN可以根据该UE的上下文中的TNL association，寻址到local AMF。
再者，由于RAN UE NGAP ID，AMF UE NGAP ID分别用于RAN和AMF在NGAP连接上唯一标识一个UE，且本地控制面已经获取到了RAN UE NGAP ID和AMF UE NGAP ID，所以本地控制面网元后续接收到RAN发送的NAS消息、RAN UE NGAP ID和AMF UE NGAP ID时，可以根据RAN UE NGAP ID和AMF UE NGAP ID在上下文中确定UE的永久标识。
1013、AMF为UE分配新的5G-GUTI。
具体实现中，向UE发送UE configuration update command，UE configuration update command中携带为UE新分配的5G-GUTI，例如，5G-GUTI-2。
其中，5G-GUTI-2包括GUAMI-2，GUAMI-2包括AMF pointer-2，AMF pointer-2对应的TNL association可以为local AMF的地址信息。因此，RAN可以根据AMFpointer-2对应的TNL association建立与local AMF之间的UE粒度的NGAP链接。
如此，当UE处于空闲态，RAN本地存储的UE的上下文已经被释放，UE向RAN 发送NAS消息时，还可以发送新分配5G-GUTI中的GUAMI，例如，GUAMI-2。RAN可以根据GUAMI-2对应的TNL association建立与local AMF之间的UE粒度的NGAP链接，将终端装置的NAS消息路由到local AMF。
1014、UE返回configuration update complete(配置更新完成)消息。
其中，UE返回的configuration update complete用于指示“UE接收到了新的5G-GUTI”。
图7所示方法中，当UE建立本地业务时，AMF可以更新UE对应的TNL association，即更新NGAP UE-TNLA-binding，触发RAN将终端装置后续发送的NAS消息路由至local AMF。
本发明实施例还提供一种寻址方法，可以应用于图1所示的通信系统，实现终端设的NAS消息的正确路由。该方法的前提是：RAN参考图9的流程配置了GUAMI和TNL Association的对应关系。如图11所示，所述方法包括以下步骤：
1101、UE发起注册流程。
当本地控制面网元部署在AMF的服务范围内，AMF支持的GUAMI可以指向本地控制面网元。具体地，AMF可以支持多个pointer，也就支持多个GUAMI。多个GUAMI可以分别指向AMF和本地控制面网元。例如，AMF支持GUAMI-1和GUAMI-2。其中，GUAMI-1包括Pointer-1，GUAMI-1对应的TNL association可以为AMF的地址信息，即GUAMI-1和AMF关联。GUAMI-2包括Pointer-2，GUAMI-2对应的TNL association可以为本地控制面网元的地址信息，即GUAMI-2和本地控制面网元关联。
同时，AMF本地存储UE的移动性管理上下文，包括UE的临时标识5G-GUTI-1、永久标识、RAN UE NGAP ID以及AMF UE NGAP ID。
1102、UE发起会话建立请求，携带会话标识、DNN以及S-NSSAI。
AMF收到UE的会话建立请求之后，调用SMF的服务Nsmf_PDU Session_Create SM Context Request，触发SMF创建会话上下文。另外，SMF还可以根据UE的位置信息、DNN或S-NSSAI确定本次会话建立请求的是本地业务。
1103、SMF向NRF请求本地控制面网元的标识。
具体地，SMF可以调用Nnrf_NFDiscovery_Request，该消息携带UE的位置信息以及请求的网元类型，NRF可以根据UE的位置信息以及请求的网元类型确定能够处理UE的本地业务的本地控制面网元，并向SMF返回该本地控制面网元的标识。这里的本地控制面网元是图1所示通信系统中的独立本地控制面网元。
1104、SMF发起N4会话建立流程。
1105、SMF将本地控制面网元的标识传递给AMF。
具体地，SMF可以通过Namf_Communication_N1N2 Message Transfer服务，将本地控制面网元的标识传递给AMF。
1106、AMF网元获取到本地控制面网元的标识之后，将移动性管理上下文和安全上下文传递给本地控制面网元。
其中，移动性管理上下文包括UE的临时标识5G-GUTI-1、永久标识、RAN UE NGAP ID以及AMF UE NGAP ID。
1107、AMF触发RAN更新NGAP UE-TNLA-binding(UE粒度的NGAP和TNLA 绑定关系)。
由于AMF在此之前已经获取到本地控制面网元的标识，可以根据地控制面网元的标识确定该UE建立了本地业务对应的会话。AMF则可以向RAN发送N2请求消息触发RAN对后续对来自该终端装置的NAS消息进行重定向。所述N2请求消息可以是本发明实施例所述的第二信息。
一种可能的实现方式中，所述N2请求消息携带该UE对应的TNL association，该TNL association对应的是本地控制面网元的地址信息。
另外，RAN接收到所述N2请求消息后，将其中的TNL association保存到上下文中。如果UE处于连接态，后续RAN从连接态的UE接收到NAS消息时，RAN可以根据该UE的上下文中的TNL association，寻址到本地控制面。
再者，由于RAN UE NGAP ID，AMF UE NGAP ID分别用于RAN和AMF在NGAP连接上唯一标识一个UE，且本地控制面已经获取到了RAN UE NGAP ID和AMF UE NGAP ID，所以本地控制面网元后续接收到RAN发送的NAS消息、RAN UE NGAP ID和AMF UE NGAP ID时，可以根据RAN UE NGAP ID和AMF UE NGAP ID在上下文中确定UE的永久标识。
1108、RAN跟UE之间进行RRC connection reconfiguration(RRC连接重配置)。
1109、RAN向本地控制面网元返回N2响应消息。
需要说明的是，在步骤1107中由于AMF已经触发RAN进行了控制面的重定向，RAN则可以将N2响应消息发给本地控制面网元。如果本地控制面网元无法处理该N2响应消息，则转发给AMF进行处理。
1110、执行会话建立流程中的其他步骤，直至会话建立流程结束。
1111、SMF向本地控制面网元发送本地业务对应的会话管理上下文。
其中，本地业务对应的会话管理上下文可以包括N3接口的用户面隧道信息、QoS信息等。
1112、AMF为UE分配新的5G-GUTI。
具体实现中，向UE发送UE configuration update command，UE configuration update command中携带为UE新分配的5G-GUTI，例如，5G-GUTI-2。
其中，5G-GUTI-2包括GUAMI-2，GUAMI-2包括AMF pointer-2，AMF pointer-2对应的TNL association可以为本地控制面网元的地址信息。因此，RAN可以根据AMF pointer-2对应的TNL association建立与本地控制面网元之间的UE粒度的NGAP链接。
如此，当UE处于空闲态，RAN本地存储的UE的上下文已经被释放，UE向RAN发送NAS消息时，还可以发送新分配5G-GUTI中的GUAMI，例如，GUAMI-2。RAN可以根据GUAMI-2对应的TNL association建立与本地控制面网元之间的UE粒度的NGAP链接，将终端装置的NAS消息路由到本地控制面网元。
1113、UE返回configuration update complete(配置更新完成)消息。
可以理解的是，图11所示的方法与图7、图10所示方法的区别在于，AMF触发RAN执行重定向，更新NGAP UE-TNLA-binding的时机不同。
针对图2所示的通信系统，本发明实施例还提供一种寻址方法，如图12所示，所述方法包括以下步骤：
1201、UE发起注册流程。
当本地控制面网元部署在AMF的服务范围内，AMF支持的GUAMI可以指向本地控制面网元。具体地，AMF可以支持多个pointer，也就支持多个GUAMI。多个GUAMI可以分别指向AMF和本地控制面网元。例如，AMF支持GUAMI-1和GUAMI-2。其中，GUAMI-1包括Pointer-1，GUAMI-1对应的TNL association可以为AMF的地址信息，即GUAMI-1和AMF关联。GUAMI-2包括Pointer-2，GUAMI-2对应的TNL association可以为本地控制面网元的地址信息，即GUAMI-2和本地控制面网元关联。
同时，AMF本地存储UE的移动性管理上下文，包括UE的临时标识5G-GUTI-1、永久标识、RAN UE NGAP ID以及AMF UE NGAP ID。
1202、UE发起会话建立请求，携带会话标识，DNN以及S-NSSAI。
1203、AMF收到UE的会话建立请求消息之后，触发SMF创建会话上下文。
具体地，AMF可以调用SMF的服务Nsmf_PDU Session_Create SM Context Request，触发SMF创建会话上下文。
另外，SMF可以根据UE的位置信息、DNN或S-NSSAI确定本次会话建立请求的是本地业务。
1204、SMF发起N4会话建立流程。
1205、SMF指示AMF：本次会话是为UE的本地业务发起的。
具体实现中，SMF通过Namf_Communication_N1N2 Message Transfer服务，向AMF发送本地控制面网元的信息，通过本地控制面网元的信息指示AMF本次会话是为UE的本地业务发起的。
一种可能的实现方式中，SMF也可以仅向AMF发送指示信息，指示本次会话是为UE的本地业务发起的，同时AMF需要为UE的本地业务选择本地控制面网元。
1206、AMF收到SMF发送的指示信息之后，执行local(本地)AMF跟local(本地)SMF的选择过程。
具体实现中，AMF可以通过以下两种方式选择local AMF和local SMF：
第一种、AMF向NRF请求local AMF、local SMF的标识。
具体地，AMF调用Nnrf_NF Discovery_Request，该消息携带UE的位置信息以及请求的网元类型，NRF可以根据UE的位置信息以及请求的网元类型确定UE的本地业务由local AMF处理，还是由local SMF处理。进而NRF可以向AMF返回local AMF ID和local SMF ID。
第二种、AMF配置了local AMF ID、local SMF ID跟位置关系的绑定关系，AMF可以根据UE的位置信息选择local AMF和local SMF。
以上两种方式仅仅作为示例，AMF也可以通过其他方式选择local AMF和local SMF方法，本发明实施例对此不做限定。
需要说明的是，AMF执行local AMF跟local SMF的选择过程之后，AMF将移动性管理上下文和安全上下文传递给local AMF。其中，移动性管理上下文包括UE的临时标识5G-GUTI-1、永久标识、RAN UE NGAP ID、AMF UE NGAP ID，以及local SMF的标识。
1207、AMF触发RAN更新NGAP UE-TNLA-binding(UE粒度的NGAP和TNLA 绑定关系)。
具体地，AMF可以向RAN发送N2请求消息，携带该UE对应的TNL association。其中，该TNL association对应的是local AMF的地址信息。RAN还可以将该UE对应的TNL association保存到上下文中。如果UE处于连接态，后续RAN从连接态的UE接收到NAS消息时，RAN根据该UE的上下文中的TNL association寻址到local AMF。
1208、RAN跟UE之间进行RRC connection reconfiguration(RRC连接重配置)。
1209、RAN返回N2响应消息。
由于步骤1207已经触发了控制面的重定向，RAN则会将N2响应消息发给local AMF。如果local AMF无法处理该N2响应消息，则转发给AMF处理。
1210、AMF向SMF发送local SMF的标识。
具体实现中，AMF调用SMF的服务Nsmf_PDU Session_Update SM Context Request，该消息携带local SMF的标识。
此外，还会执行会话建立流程中的其他步骤，直至会话建立流程结束。
1211、SMF向local SMF网元发送本地业务对应的会话管理上下文。
其中，本地业务对应的会话管理上下文可以包括N3接口的用户面隧道信息、QoS信息等。
1212、AMF为UE分配新的5G-GUTI。
具体实现中，向UE发送UE configuration update command，UE configuration update command中携带为UE新分配的5G-GUTI，例如，5G-GUTI-2。
其中，5G-GUTI-2包括GUAMI-2，GUAMI-2包括AMF pointer-2，AMF pointer-2对应的TNL association可以为local AMF的地址信息。因此，RAN可以根据AMF pointer-2对应的TNL association建立与local AMF之间的UE粒度的NGAP链接。
如此，当UE处于空闲态，RAN本地存储的UE的上下文已经被释放，UE向RAN发送NAS消息时，还可以发送新分配5G-GUTI中的GUAMI，例如，GUAMI-2。RAN可以根据GUAMI-2对应的TNL association建立与local AMF之间的UE粒度的NGAP链接，将终端装置的NAS消息路由到local AMF。
1213、UE返回UE configuration update complete(配置更新完成)消息。
本发明实施例还提供一种寻址方法，RAN可以根据预先配置的目标网元的信息，以及目标网元对应的信息类型，对来自终端装置的NAS消息进行正确寻址。应用于图1所示的通信系统，如图13所示，所述方法包括以下步骤：
1301、RAN配置目标网元的信息以及目标网元对应的信息类型。
具体实现中，RAN上配置的可以是信息类型和TNL association的对应关系，由于TNL association可以指向某个网元，因此RAN可以根据信息类型和TNL association的对应关系，将来自终端装置的NAS消息发送给目标网元。
另外，所述目标网元可以AMF或本地控制面网元。信息类型可以包括第一类型(type-1)、第二类型(type-2)。进一步，type-1类型的消息对应的TNL association可以是AMF的地址信息，即type-1类型的消息对应的目标网元为AMF；type-2类型的消息对应的TNL association可以是本地控制面网元的地址信息，即type-2类型的消息对应的目标网元为本地控制面网元。
一种可能的实现方式中，可以根据图14所示的流程为RAN配置信息类型和目标网元的对应关系，具体包括：
步骤S0、RAN向AMF发起NG setup(安装)流程。
需要说明的是NG setup流程的目的是交换RAN和AMF所需的应用数据，以便RAN和AMF之间能够进行信令交互。该过程应是TNLA触发的第一个NGAP程序，该过程使用的信令与UE不相关。
具体地，RAN可以向AMF发送NG setup request消息，该消息携带global RAN node ID以及RAN支持的TA列表等。
步骤S1、AMF返回NG setup response(安装响应)消息。
具体地，该消息携带该AMF支持的GUAMI列表，例如AMF支持的GUAMI列表包括GUAMI-1。需要说明的是，如果本地控制面网元在AMF的服务范围内，只需要为AMF配置一个GUAMI即可，但是该GUAMI可以对应不同的TNL association。
示例的，GUAMI-1＝<MCC><MNC><AMF Region ID><AMF Set ID><AMF Pointer-1>。
步骤S2、AMF发起AMF configuration update(配置更新)流程。
具体地，AMF在该流程中向RAN发送的请求消息中携带该AMF支持的GUAMI对应的TNL Association信息。
例如：AMF支持的GUAMI列表为GUAMI-1。如果信息类型是type(类型)-1，GUAMI-1对应的TNL Association(关联)可以为“TNL association address(地址)-1”；如果信息类型是type(类型)-2，GUAMI-1对应的TNL association可以为“TNL association address(地址)-2”。
这里的TNL association Address-1是可以指向AMF的地址信息，例如，TNL association Address-1可以是AMF的地址信息；本地控制面TNL association address-2是可以指向本地控制面的地址信息，例如，本地控制面TNL association address-2可以是本地控制面网元的地址信息。
步骤S3、RAN向AMF返回configuration update acknowledge(配置更新确认)消息。
1302、UE发起注册流程。
具体地，UE会向RAN发送注册请求消息发起注册流程。另外，由于UE没有提供GUAMI给RAN，RAN默认认为UE本次发送的注册请求消息为type-1，因此选择AMF来处理UE的注册请求消息。
同时，AMF在本地存储UE的移动性管理上下文。其中，UE的移动性管理上下文包括UE的临时标识5G-GUTI、永久标识、RAN UE NGAP ID以及AMF UE NGAP ID。
1303、UE发起会话建立请求。
具体地，UE可以向AMF发送会话建立请求消息发起会话建立请求，该消息携带会话标识、DNN以及S-NSSAI。
另外，AMF收到UE的会话建立请求消息之后，还可以调用SMF的服务Nsmf_PDU Session_Create SM Context Request，触发SMF创建会话上下文。SMF还可以根据UE的位置信息、DNN或S-NSSAI确定本次会话建立请求的是本地业务。
1304、SMF向NRF请求本地控制面网元的标识。
具体地，SMF可以调用Nnrf_NFDiscovery_Request，该消息携带UE的位置信息以及请求的网元类型，NRF可以根据UE的位置信息以及请求的网元类型确定能够处理UE的本地业务的本地控制面网元，并向SMF返回该本地控制面网元的标识。这里的本地控制面网元是图1所示通信系统中的独立本地控制面网元。
1305、SMF发起N4会话建立流程。
1306、SMF通过Namf_Communication_N1N2MessageTransfer服务，将本地控制面网元的标识传递给AMF。
1307、AMF网元获知本地控制面网元的标识之后，将移动性管理上下文和安全上下文传递给本地控制面网元。
其中，移动性管理上下文包括UE的临时标识5G-GUTI、永久标识、RAN UE NGAP ID以及AMF UE NGAP ID。
1308、AMF向RAN发送N2请求消息。
1309、RAN跟UE之间进行RRC connection reconfiguration(RRC连接重配置)。
1310、执行会话建立流程中的其他步骤，直至会话建立流程结束。
1311、SMF向本地控制面网元发送本地业务对应的会话管理上下文。
其中，本地业务对应的会话管理上下文可以包括N3接口的用户面隧道信息、QoS信息等。
1312、AMF向UE发送UE configuration update command(配置更新请求)，指示UE向RAN发送NAS消息的信息类型。
其中，UE configuration update command即本发明实施例所述的配置更新请求信息。也就是说，UE后续发送NAS消息时需要将信息类型也发送给RAN，以便RAN可以根据信息类型将NAS消息路由至AMF还是本地控制面网元。
示例的，UE后续发起业务请求(service request，SR)流程、会话建立流程时，相应的NAS消息需要由本地控制面网元来处理，即在此流程中产生的NAS消息的信息类型为type-2。UE发送这些消息时，还将信息类型“type-2”发送给RAN，RAN可以根据“type-2”确定接收到的NAS消息的目标网元为本地控制面网元，则将接收到的NAS消息发送给本地控制面网元，使得SR流程、会话建立流程中产生的NAS消息终结到本地控制面上。
UE后续发起注册更新流程或者周期性注册更新流程，相应的NAS消息需要由AMF来处理，即在此流程中产生的NAS消息的信息类型为type-1。UE发送这些消息时，还将信息类型“type-1”发送给RAN，RAN可以根据“type-1”确定接收到的NAS消息的目标网元为AMF，则将接收到的NAS消息发送给AMF，使得注册更新流程或者周期性注册更新流程中产生的NAS消息终结到AMF上。
1313、UE返回UE configuration update complete(配置更新完成)消息。
针对图2所示的通信系统，本发明实施例还提供一种寻址方法，如图15所示，所述方法包括以下步骤：
1501、RAN配置信息类型和目标网元的对应关系。
具体实现中，RAN具体的配置方法可以参考步骤1301的相关描述，可以参考图 14所示的配置流程在RAN上配置信息类型和目标网元的对应关系，本发明实施例对此不做赘述。
1502、UE发起注册流程。
具体地，UE会向RAN发送注册请求消息发起注册流程。另外，由于UE没有提供GUAMI给RAN，RAN默认认为UE本次发送的注册请求消息为type-1，因此选择AMF来处理UE的注册请求消息。
同时，AMF在本地存储UE的移动性管理上下文。其中，UE的移动性管理上下文包括UE的临时标识5G-GUTI、永久标识、RAN UE NGAP ID以及AMF UE NGAP ID。
1503、UE发起会话建立请求。
具体地，UE向AMF发送会话建立请求消息，该消息携带会话标识、DNN以及S-NSSAI。
另外，AMF收到UE的会话建立请求消息之后，还可以调用SMF的服务Nsmf_PDU Session_Create SM Context Request，触发SMF创建会话上下文。SMF还可以根据根据UE的位置信息、DNN或S-NSSAI确定本次会话建立请求的是本地业务。
1504、SMF发起N4会话建立流程。
1505、SMF指示AMF：本次会话是为UE的本地业务发起的。
具体实现中，SMF通过Namf_Communication_N1N2 Message Transfer服务，向AMF发送本地控制面网元的信息，通过本地控制面网元的信息指示AMF本次会话是为UE的本地业务发起的。
一种可能的实现方式中，SMF也可以仅向AMF发送指示信息，指示本次会话是为UE的本地业务发起的，同时AMF需要为UE的本地业务选择本地控制面网元。
1506、AMF网元收到指示信息之后，执行local(本地)AMF跟local SMF网元的选择过程。
具体实现中，AMF可以通过以下两种方式选择local AMF和local SMF：
第一种、AMF向NRF请求local AMF、local SMF的标识。
具体地，AMF调用Nnrf_NF Discovery_Request，该消息携带UE的位置信息以及请求的网元类型，NRF可以根据UE的位置信息以及请求的网元类型确定UE的本地业务由local AMF处理，还是由local SMF处理。进而NRF可以向AMF返回local AMF ID和local SMF ID。
第二种、AMF配置了local AMF ID、local SMF ID跟位置关系的绑定关系，AMF可以根据UE的位置信息选择local AMF和local SMF。
以上两种方式仅仅作为示例，AMF也可以通过其他方式选择local AMF和local SMF方法，本发明实施例对此不做限定。
需要说明的是，AMF执行local AMF跟local SMF的选择过程之后，AMF将移动性管理上下文和安全上下文传递给local AMF。其中，移动性管理上下文包括UE的临时标识5G-GUTI-1、永久标识、RAN UE NGAP ID、AMF UE NGAP ID，以及local SMF的标识。
1507、AMF向RAN发送N2请求消息。
1508、RAN跟UE之间进行RRC connection reconfiguration(RRC连接重配置)。
1509、RAN返回N2响应消息。
1510、AMF向SMF发送local SMF的标识。
具体实现中，AMF调用SMF的服务Nsmf_PDU Session_Update SM Context Request，该消息携带local SMF的标识。
此外，还会执行会话建立流程中的其他步骤，直至会话建立流程结束。
1511、SMF向local SMF网元发送本地业务对应的会话管理上下文。
其中，本地业务对应的会话管理上下文可以包括N3接口的用户面隧道信息、QoS信息等。
1512、AMF向UE发送UE configuration update command(配置更新请求)，指示UE向RAN发送NAS消息的信息类型。
具体实现方式参考步骤1312的相关描述，在此不做赘述。
1513、UE返回UE configuration update complete(配置更新完成)消息。
在采用对应各个功能划分各个功能模块的情况下，图16示出上述实施例中所涉及的通信装置的一种可能的结构示意图。图8所示的通信装置可以是本申请实施例所述的接入移动管理功能网元(或终端装置，或无线接入网设备)，也可以是接入移动管理功能网元(或终端装置，或无线接入网设备)中实现上述方法的部件，或者，也可以是应用于接入移动管理功能网元(或终端装置，或无线接入网设备)中的芯片。所述芯片可以是片上系统(System-On-a-Chip，SOC)或者是具备通信功能的基带芯片等。如图16所示，通信装置包括处理单元1601以及通信单元1602。处理单元可以是一个或多个处理器，通信单元可以是收发器。
处理单元1601，用于支持该接入移动管理功能网元执行“生成第二信息”、“确定终端装置建立了本地业务”等步骤，用于支持无线接入网设备确定“向第一网元发送第三信息”，和/或用于本文所描述的技术的其它过程。
通信单元1602，用于支持该通信装置与其他通信装置之间的通信，例如，支持无线接入网设备执行步骤501、502、504、505、601、602、604、605，支持接入移动管理功能网元执行步骤502、503、504、505、601以及603，支持终端装置执行步骤501、505、603、604，和/或用于本文所描述的技术的其它过程。
需要说明的是，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
示例性的，在采用集成的单元的情况下，本申请实施例提供的通信装置的结构示意图如图17所示。在图17中，该通信装置包括：处理模块1701和通信模块1702。处理模块1701用于对通信装置的动作进行控制管理，例如，执行上述处理单元1601执行的步骤，和/或用于执行本文所描述的技术的其它过程。通信模块1702用于执行上述通信单元1602执行的步骤，支持通信装置与其他设备之间的交互，如与其他终端装置之间的交互。如图17所示，通信装置还可以包括存储模块1703，存储模块1703用于存储通信装置的程序代码和数据。
当处理模块1701为处理器，通信模块1702为收发器，存储模块1703为存储器时，通信装置为图3所示的通信装置。
本发明实施例提供一种计算机可读存储介质，计算机可读存储介质中存储有指令； 指令用于执行如图5～图7、图9～图15所示的寻址方法。
本发明实施例提供一种包括指令的计算机程序产品，当其在通信装置上运行时，使得通信装置执行如图5～图7、图9～图15所示的寻址方法。
本发明实施例一种无线通信装置，包括：无线通信装置中存储有指令；当无线通信装置在图3、图16、图17所示的通信装置上运行时，使得通信装置执行如图5～图7、图9～图15所示的寻址方法。该无线通信装置可以为芯片。
本发明实施例还提供一种通信系统，包括：终端装置、无线接入网设备以及接入移动管理功能网元。其中，终端装置可以是图3、图16、图17所示的通信装置，无线接入网设备可以是图3、图16、图17所示的通信装置，接入移动管理功能网元可以是图3、图16、图17所示的通信装置。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将数据库访问装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
在本申请所提供的几个实施例中，应该理解到，所揭露的数据库访问装置和方法，可以通过其它的方式实现。例如，以上所描述的数据库访问装置实施例仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个装置，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，数据库访问装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是一个物理单元或多个物理单元，即可以位于一个地方，或者也可以分布到多个不同地方。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个可读取存储介质中。基于这样的理解，本申请实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该软件产品存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何在本申请揭露的技术范围内的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (28)

  1. 一种寻址方法，其特征在于，包括：
    无线接入网设备向接入移动管理功能网元发送来自终端装置的第一信息；所述第一信息用于请求为所述终端装置建立本地业务的会话；
    所述无线接入网设备接收所述接入移动管理功能网元发送的第二信息，所述第二信息包括第一地址，所述第一地址指向第一网元；
    所述无线接入网设备接收所述终端装置发送的第三信息，向所述第一网元发送所述第三信息。
  2. 根据权利要求1所述的方法，其特征在于，所述第一信息和所述第三信息为所述终端装置发送的非接入层NAS消息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    所述无线接入网设备接收所述终端装置发送的第一标识，所述第一标识与所述第一网元关联。
  4. 根据权利要求3所述的方法，其特征在于，
    根据所述第一标识确定所述第三信息的寻址地址为所述第一网元，所述无线接入网设备向所述第一网元发送所述第三信息。
  5. 根据权利要求1-4任一项所述的方法，其特征在于，所述第一网元为本地控制面网元。
  6. 一种寻址方法，其特征在于，包括：
    接入移动管理功能网元接收无线接入网设备发送的来自终端装置的第一信息；所述第一信息用于请求为所述终端装置建立本地业务的会话；
    所述接入移动管理功能网元确定所述终端装置建立了本地业务；
    所述接入移动管理功能网元向所述无线接入网设备发送第二信息，所述第二信息包括第一地址，所述第一地址指向第一网元。
  7. 根据权利要求6所述的方法，其特征在于，所述第一信息为所述终端装置发送的非接入层NAS消息。
  8. 根据权利要求6或7所述的方法，其特征在于，所述接入移动管理功能网元确定所述终端装置建立了本地业务，包括：
    接收会话管理功能网元发送的指示信息，所述指示信息用于指示所述终端装置建立了本地业务；
    根据所述指示信息确定所述终端装置建立了本地业务。
  9. 根据权利要求6或7所述的方法，其特征在于，所述接入移动管理功能网元确定终端装置建立了本地业务，包括：
    接收会话管理功能网元发送的所述第一网元的信息，根据所述第一网元的信息确定所述终端装置建立了本地业务。
  10. 根据权利要求6-9任一项所述的方法，其特征在于，所述方法还包括：
    向所述终端装置发送第一标识，所述第一标识与所述第一网元关联。
  11. 根据权利要求6-10任一项所述的方法，其特征在于，所述第一网元为本地控制面网元。
  12. 一种寻址方法，其特征在于，包括：
    接入移动管理功能网元向无线接入网设备发送目标网元的信息，以及与所述目标网元对应的信息类型；
    所述接入移动管理功能网元确定终端装置建立了本地业务，向所述终端装置发送配置更新请求信息；所述配置更新请求信息用于指示所述终端装置向无线接入网设备发送第一信息的所述信息类型，所述第一信息用于所述无线接入网设备根据所述第一信息的所述信息类型向目标网元发送所述第一信息；其中，所述目标网元包括所述接入移动管理功能网元或本地控制面网元。
  13. 根据权利要求12所述的方法，其特征在于，
    所述目标网元为所述接入移动管理功能网元，所述目标网元对应的所述信息类型为第一类型；
    所述目标网元为所述本地控制面网元，所述目标网元对应的所述信息类型为第二类型。
  14. 根据权利要求12或13所述的方法，其特征在于，所述第一信息为所述终端装置发送的非接入层NAS消息。
  15. 根据权利要求12-14任一项所述的方法，其特征在于，所述接入移动管理功能网元确定终端装置建立了本地业务，包括：
    接收会话管理功能网元发送的指示信息，根据所述指示信息确定所述终端装置建立了本地业务；所述指示信息用于指示所述终端装置建立了本地业务。
  16. 根据权利要求12-14任一项所述的方法，其特征在于，所述接入移动管理功能网元确定终端装置建立了本地业务，包括：
    接收会话管理功能网元发送的所述本地控制面网元的信息，根据所述本地控制面网元的信息确定所述终端装置建立了本地业务。
  17. 一种寻址方法，其特征在于，包括：
    无线接入网设备接收接入移动管理功能网元发送的目标网元的信息，以及与所述目标网元对应的信息类型；
    所述无线接入网设备接收终端装置发送的第一信息以及所述第一信息的所述信息类型，根据所述第一信息的所述信息类型向目标网元发送所述第一信息；所述目标网元包括所述接入移动管理功能网元或本地控制面网元。
  18. 根据权利要求17所述的方法，其特征在于，
    所述目标网元为所述接入移动管理功能网元，所述目标网元对应的所述信息类型为第一类型；
    所述目标网元为所述本地控制面网元，所述目标网元对应的所述信息类型为第二类型。
  19. 根据权利要求18所述的方法，其特征在于，所述无线接入网设备根据所述第一信息的信息类型向目标网元发送所述第一信息，具体包括：
    根据与所述目标网元所对应的信息类型确定所述目标网元。
  20. 根据权利要求17-19任一项所述的方法，其特征在于，所述第一信息为所述终端装置发送的非接入层NAS消息。
  21. 一种寻址方法，其特征在于，包括：
    终端装置接收接入移动管理功能网元发送的配置更新请求信息；所述配置更新请求信息用于指示所述终端装置向无线接入网设备发送第一信息的信息类型；
    所述终端装置向所述无线接入网设备发送所述第一信息以及所述第一信息的所述信息类型，所述信息类型用于所述无线接入网设备根据所述信息类型向目标网元发送所述第一信息；所述目标网元包括所述接入移动管理功能网元或本地控制面网元。
  22. 根据权利要求21所述的方法，其特征在于，所述第一信息为所述终端装置发送的非接入层NAS消息。
  23. 一种系统，其特征在于，包括：无线接入网设备和接入移动管理功能网元；
    其中，所述接入移动管理功能网元用于，接收所述无线接入网设备发送的来自终端装置的第一信息，确定所述终端装置建立了本地业务，并向所述无线接入网设备发送第二信息，所述第二信息包括第一地址，所述第一地址指向第一网元；所述第一信息用于请求为所述终端装置建立本地业务的会话；
    所述无线接入网设备用于，向所述接入移动管理功能网元发送所述第一信息，接收所述接入移动管理功能网元发送的所述第二信息，接收所述终端装置发送的第三信息，根据所述第一地址向所述第一网元发送所述第三信息；
    或，
    所述接入移动管理功能网元用于，向无线接入网设备发送目标网元的信息，以及与所述目标网元对应的信息类型，确定终端装置建立了本地业务，向所述终端装置发送配置更新请求信息；所述配置更新请求信息用于指示所述终端装置向无线接入网设备发送第一信息的信息类型，所述第一信息用于所述无线接入网设备根据所述第一信息的所述信息类型向目标网元发送所述第一信息；其中，所述目标网元包括所述接入移动管理功能网元或本地控制面网元；
    所述无线接入网设备用于，接收接入移动管理功能网元发送的目标网元的信息以及与所述目标网元对应的信息类型，接收终端装置发送的所述第一信息以及所述第一信息的信息类型，根据所述第一信息的信息类型向目标网元发送所述第一信息。
  24. 一种接入移动管理功能网元，包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序，其特征在于，所述处理器执行所述程序时实现权利要求6-16中任一项所述的寻址方法。
  25. 一种无线接入设备，包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序，其特征在于，所述处理器执行所述程序时实现权利要求1-5或权利要求17-20中任一项所述的寻址方法。
  26. 一种装置，包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序，其特征在于，所述处理器执行所述程序时实现权利要求21或22所述的寻址方法。
  27. 一种计算机可读存储介质，其特征在于，包括指令，当其在计算机上运行时，使得计算机执行如权利要求1-22任一项所述的寻址方法。
  28. 一种计算机程序产品，其特征在于，包括指令，当其在计算机上运行时，使得计算机执行如权利要求1-22任一项所述的寻址方法。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023073408A1 (en) * 2021-10-28 2023-05-04 Nokia Technologies Oy Apparatus, method and computer program for creating an association between the apparatus and a network function
WO2024027320A1 (zh) * 2022-07-30 2024-02-08 华为技术有限公司 无线通信的方法、装置和系统

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113115480A (zh) * 2021-04-02 2021-07-13 腾讯科技（深圳）有限公司 地址信息发送方法、获取方法、装置、设备及介质
EP4125293B1 (en) * 2021-07-29 2024-02-28 Ntt Docomo, Inc. Communication network arrangement
CN113473371B (zh) * 2021-08-31 2022-01-25 阿里巴巴达摩院(杭州)科技有限公司 无线通信方法、直播数据的处理方法、amf及ran
CN115119287B (zh) * 2022-06-29 2024-03-26 阿里巴巴（中国）有限公司 通信网络、车联网、终端设备接入方法、设备和存储介质

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108738077A (zh) * 2017-04-25 2018-11-02 华为技术有限公司 一种负荷迁移的方法、装置和系统
CN109041136A (zh) * 2017-06-12 2018-12-18 电信科学技术研究院 一种插入smf的方法及amf实体

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104079574B (zh) * 2014-07-02 2017-04-12 南京邮电大学 云环境下基于属性和同态混合加密的用户隐私保护方法
US10779254B2 (en) * 2017-08-16 2020-09-15 Electronics And Telecommunications Research Institute Service request method for 5G local service
CN112202842A (zh) * 2017-08-29 2021-01-08 华为技术有限公司 数据传输方法、设备及系统

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108738077A (zh) * 2017-04-25 2018-11-02 华为技术有限公司 一种负荷迁移的方法、装置和系统
CN109041136A (zh) * 2017-06-12 2018-12-18 电信科学技术研究院 一种插入smf的方法及amf实体

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ERICSSON: "SMF Service Areas", SA WG2 MEETING #122 S2-174193, 30 June 2017 (2017-06-30), XP051309279 *
HUAWEI ET AL.: "Intermediate SMF/UPF Selection and the Architecture", 3GPP SA WG2 MEETING #122 S2-174325, 30 June 2017 (2017-06-30), XP051309403 *
ZTE: "Evaluation of Solution 16", SA WG2 MEETING #128BIS S2-188225, 14 August 2018 (2018-08-14), XP051537153 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023073408A1 (en) * 2021-10-28 2023-05-04 Nokia Technologies Oy Apparatus, method and computer program for creating an association between the apparatus and a network function
WO2024027320A1 (zh) * 2022-07-30 2024-02-08 华为技术有限公司 无线通信的方法、装置和系统

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