WO2020155972A1 - 一种移动性管理方法及装置 - Google Patents

一种移动性管理方法及装置 Download PDF

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Publication number
WO2020155972A1
WO2020155972A1 PCT/CN2019/128854 CN2019128854W WO2020155972A1 WO 2020155972 A1 WO2020155972 A1 WO 2020155972A1 CN 2019128854 W CN2019128854 W CN 2019128854W WO 2020155972 A1 WO2020155972 A1 WO 2020155972A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
network element
mac address
address
control plane
Prior art date
Application number
PCT/CN2019/128854
Other languages
English (en)
French (fr)
Inventor
徐长春
蔺波
王岩
李世昆
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP19912817.4A priority Critical patent/EP3886500B1/en
Publication of WO2020155972A1 publication Critical patent/WO2020155972A1/zh
Priority to US17/388,980 priority patent/US11910485B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/30—Network data restoration; Network data reliability; Network data fault tolerance
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5038—Address allocation for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/10—Reselecting an access point controller
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/34—Modification of an existing route
    • H04W40/36—Modification of an existing route due to handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/12—Mobility data transfer between location registers or mobility servers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/618—Details of network addresses
    • H04L2101/622—Layer-2 addresses, e.g. medium access control [MAC] addresses

Definitions

  • This application relates to the field of communication technology, and in particular to a mobility management method and device.
  • Ethernet is the basis of the industrial Ethernet protocol. Supporting Ethernet will help 3GPP to carry out industrial control networks.
  • a terminal device when a terminal device is in the process of business communication, after a terminal device moves, it will need to switch the access device of the terminal device and switch the forwarding path of the external switching network at the same time to completely update the end-to-end Forwarding path.
  • the terminal device moves, it is necessary to update the media access control address (MAC) address forwarding table of the entire network to realize the switching of the forwarding path.
  • MAC media access control address
  • each terminal device moves to modify the MAC address forwarding table, which will cause a waste of resources, and the possibility of modification failure or incomplete modification during the process of modifying the MAC address forwarding table is very high, and service continuity cannot be guaranteed. Therefore, the above method cannot flexibly realize the switching of the forwarding path.
  • the present application provides a mobility management method and device, which are used to flexibly realize the switching of forwarding paths and ensure the continuity of services during the movement of terminal equipment.
  • the present application provides a mobility management method, the method includes: after the first terminal device moves, the control plane network element determines the changed media access control address MAC address of the first terminal device; The control plane network element determines at least one second terminal device belonging to the same terminal device group as the first terminal device, and notifies the first terminal device and the at least one second terminal device to update the first terminal device The changed MAC address of the terminal device, where the first terminal device is the terminal device whose address has changed after the movement, and the at least one second terminal device is the terminal device in the group of terminal devices other than the first terminal device Terminal Equipment.
  • control plane network element needs to determine the MAC address of the mobile terminal device and notify the corresponding terminal device to update. There is no need to change the MAC address forwarding table in the system, so that the forwarding path can be switched flexibly. Ensure business continuity during the movement of terminal equipment.
  • the control plane network element determines that the at least one second terminal device belongs to the same terminal device group as the first terminal device.
  • the specific method may include: the control plane network element Query the member information of the terminal device group where the first terminal device is located from the group management function network element, where the member information includes the identities of all terminal devices included in the terminal device group; then the control plane network element The at least one second terminal device is determined according to the member information.
  • control plane network element can accurately determine the at least one second terminal device belonging to the same terminal device group as the first terminal device.
  • control plane network element notifies the first terminal device to update the changed MAC address of the first terminal device.
  • the specific method may be:
  • the control plane network element sends first address update information to the first terminal device through the first device, where the first address update information includes the changed MAC address of the first terminal device; wherein, the first The device is the target access device after the first terminal device moves;
  • control plane network element sends second address update information to the first terminal device through a second device, where the second address update information includes the changed MAC address of the first terminal device; wherein, the The second device is a target user plane function network element after the first terminal device is moved, or the second device is a target co-located device after the first terminal device is moved, wherein the target co-located device is Access equipment and user plane functional network elements are combined equipment.
  • control plane network element can flexibly implement informing the first terminal device to update the changed MAC address of the first terminal device by adopting different methods according to different situations.
  • the control plane network element when any second terminal device is a terminal device accessed through the 3GPP network, the control plane network element notifies the any second terminal device to update the changed value of the first terminal device MAC address, the specific method may include: the control plane network element sends third address update information to any second terminal device through the access device currently accessed by any second terminal device, and the third The address update information includes the changed MAC address of the first terminal device.
  • control plane network element can successfully notify any one of the second terminal devices to update the changed MAC address of the first terminal device according to actual conditions.
  • the specific method may include: the control plane network element sends fourth address update information to any of the second terminal devices through the network open function network element, where the fourth address update information includes the first terminal device The changed MAC address.
  • control plane network element can successfully notify any one of the second terminal devices to update the changed MAC address of the first terminal device according to actual conditions.
  • the control plane network element notifies any second terminal device to update the changed MAC address of the first terminal device.
  • the specific method may include: the control plane network element informs all the second terminal devices through a third device. Any one of the second terminal devices sends fifth address update information, where the fifth address update information includes the changed MAC address of the first terminal device; wherein, the third device is any of the second terminal devices.
  • the user plane function network element currently accessed, or the third device is a co-located device currently accessed by any of the second terminal devices, and the co-located device is a combination of the access device and the user plane function network element Set up equipment.
  • control plane network element can accurately notify any one of the second terminal devices to update the changed MAC address of the first terminal device.
  • control plane network element initiates a release procedure of the original MAC address of the first terminal device, where the original MAC address of the first terminal device is the MAC address of the first terminal device before the movement. This can save resource occupation and avoid resource waste.
  • this application provides a mobility management method, which is applied to a terminal device mobile scenario, the method includes: the first terminal device obtains a notification from the control plane network element to update the changed MAC address of the first terminal device Afterwards, the MAC address is updated to the changed MAC address of the first terminal device.
  • the first terminal device obtains a notification to update the changed MAC address of the first terminal device from the control plane network element.
  • the specific method may be:
  • the first terminal device receives first address update information sent by the control plane network element through the first device, where the first address update information includes the changed MAC address of the first terminal device; wherein, the first A device is a target access device after the first terminal device moves;
  • the first terminal device receives second address update information sent by the control plane network element through a second device, where the second address update information includes the changed MAC address of the first terminal device; wherein, The second device is the target user plane function network element after the first terminal device moves, or the second device is the target co-located device after the first terminal device moves, wherein the target co-located device
  • the device is a device that is combined with an access device and a user plane function network element.
  • the first terminal device can accurately obtain a notification to update the changed MAC address of the first terminal device, so that the MAC address of the first terminal device is subsequently updated to the changed MAC address.
  • the present application provides a mobility management method, which is applied to a terminal device movement scenario.
  • the method may include: the second terminal device obtains from the control plane network element the updated MAC address of the first terminal device After the notification, the cached address of the first terminal device is updated to the changed MAC address of the first terminal device.
  • the second terminal device when the second terminal device is a terminal device accessed through the 3GPP network, the second terminal device obtains the updated MAC of the first terminal device from the control plane network element
  • the specific method of address notification may include: the second terminal device receives third address update information sent by the control plane network element through the access device currently accessed by the second terminal device, and the third address update The information includes the changed MAC address of the first terminal device.
  • the second terminal device can accurately obtain the notification to update the changed MAC address of the first terminal device, so that the MAC address of the first terminal device is subsequently updated to the changed MAC address.
  • the second terminal device when the second terminal device is a terminal device accessed through a fixed network, the second terminal device obtains from the control plane network element the updated MAC of the first terminal device
  • the specific method of address notification may include: the second terminal device receives fourth address update information sent by the session management function network element through the network opening function network element, where the fourth address update information includes the first terminal The changed MAC address of the device.
  • the second terminal device can accurately obtain the notification to update the changed MAC address of the first terminal device, so that the MAC address of the first terminal device is subsequently updated to the changed MAC address.
  • the second terminal device obtains a notification from the control plane network element to update the changed MAC address of the first terminal device.
  • the specific method may include: the second terminal device receives the The fifth address update information sent by the control plane network element through the third device, where the fifth address update information includes the changed MAC address of the first terminal device; wherein the third device is the second terminal device The user plane function network element currently accessed, or the third device is a co-located device currently accessed by the second terminal device, and the co-located device is a co-located device of the access device and the user plane function network element equipment.
  • the second terminal device can accurately obtain the notification to update the changed MAC address of the first terminal device, so that the MAC address of the first terminal device is subsequently updated to the changed MAC address.
  • the present application also provides a control plane network element, which has the function of realizing the control plane network element in the above-mentioned method example of the first aspect.
  • the function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the structure of the control plane network element includes a processing unit and a transceiver unit. These units can perform the corresponding functions in the method example of the first aspect. For details, please refer to the detailed description in the method example. Do repeat.
  • the structure of the control plane network element includes a transceiver and a processor, and optionally may also include a memory.
  • the transceiver is used to send and receive data, and to communicate with other devices in the communication system, and process
  • the device is configured to support the control plane network element to perform the corresponding function in the above-mentioned first aspect method.
  • the memory is coupled with the processor, and it stores the necessary program instructions and data of the control plane network element.
  • the present application also provides a first terminal device that has the function of implementing the first terminal device in the method example of the second aspect described above.
  • the function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the structure of the first terminal device includes a transceiver unit and a processing unit. These units can perform the corresponding functions in the method examples of the second aspect. For details, please refer to the detailed description in the method examples. Do repeat.
  • the structure of the first terminal device includes a transceiver and a processor, and optionally may also include a memory.
  • the transceiver is used to send and receive data, and to communicate and interact with other devices in the communication system.
  • the device is configured to support the first terminal device to perform the corresponding function in the above-mentioned second aspect method.
  • the memory is coupled with the processor, and it stores the necessary program instructions and data of the first terminal device.
  • the present application also provides a second terminal device that has the function of implementing the second terminal device in the method example of the third aspect.
  • the function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the structure of the second terminal device includes a transceiver unit and a processing unit. These units can perform the corresponding functions in the method example of the third aspect. For details, please refer to the detailed description in the method example. Do repeat.
  • the structure of the second terminal device includes a transceiver and a processor, and optionally a memory.
  • the transceiver is used to send and receive data, and to communicate and interact with other devices in the communication system.
  • the device is configured to support the second terminal device to perform the corresponding function in the above-mentioned third aspect method.
  • the memory is coupled with the processor, and it stores the necessary program instructions and data of the second terminal device.
  • the present application also provides a communication system.
  • the communication system may include the control plane network element, the first terminal device, and at least one second terminal device mentioned in the above design.
  • this application also provides a computer storage medium in which computer-executable instructions are stored.
  • the computer-executable instructions are used to make the computer execute any of the above methods when called by the computer.
  • this application also provides a computer program product containing instructions, which when run on a computer, causes the computer to execute any of the above methods.
  • this application also provides a chip, which is coupled to a memory, and is used to read and execute program instructions stored in the memory to implement any of the above methods.
  • FIG. 1 is a schematic diagram of the architecture of a communication system provided by this application.
  • FIG. 2 is a schematic diagram of the architecture of another communication system provided by this application.
  • FIG. 3 is a schematic diagram of the architecture of another communication system provided by this application.
  • FIG. 4 is a flowchart of a mobility management method provided by this application.
  • FIG. 5 is a flowchart of an example of a mobility management method provided by this application.
  • FIG. 6 is a flowchart of an example of another mobility management method provided by this application.
  • FIG. 7 is a flowchart of an example of another mobility management method provided by this application.
  • FIG. 8 is a flowchart of an example of another mobility management method provided by this application.
  • FIG. 9 is a flowchart of an example of another mobility management method provided by this application.
  • FIG. 10 is a flowchart of an example of another mobility management method provided by this application.
  • FIG. 11 is a flowchart of an example of another mobility management method provided by this application.
  • Figure 12a is a schematic diagram of a service path provided by this application.
  • Figure 12b is a schematic diagram of another service path provided by this application.
  • FIG. 13 is a schematic structural diagram of a control plane network element provided by this application.
  • FIG. 14 is a schematic structural diagram of a first terminal device provided by this application.
  • FIG. 15 is a schematic structural diagram of a second terminal device provided by this application.
  • FIG. 16 is a structural diagram of a control plane network element provided by this application.
  • FIG. 17 is a structural diagram of a first terminal device provided by this application.
  • FIG. 18 is a structural diagram of a second terminal device provided by this application.
  • the embodiments of the present application provide a mobility management method and device, which are used to flexibly switch forwarding paths and ensure service continuity during the movement of terminal equipment.
  • the method and device described in the present application are based on the same inventive concept, and because the method and the device have similar principles for solving the problem, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • a control plane is a device that performs mobility management according to the movement of a terminal device.
  • the control plane network element may be, but is not limited to, the 3rd generation partnership project (the 3rd generation partnership project, 3GPP) control plane network element.
  • the control plane network element may be a session management function network element (session management function). , SMF), core network access and mobility management function network element (access and mobility management function, AMF), unified data management network element (unified data management, UDM), etc.
  • At least one which means one or more.
  • a possible communication system architecture to which the mobility management method provided in the embodiments of this application is applicable may include network slice selection function network elements, network opening function network elements, network function library function network elements, policy control function network elements, and data Management network element, group management function network element, application function network element, core network access and mobility management function network element, session management function network element, authentication server function network element, path management function network element, terminal equipment, Access network equipment, user plane function network elements and data network.
  • NSSF network element NEF network element, NRF network element, PCF network element, UDM network element, GMF network element, AF network element , AMF network element, SMF network element, AUSF network element, PMF network element, UE, access network (AN) equipment, UPF network element and data network (data network, DN).
  • the AMF network element and the terminal device can be connected through the N1 interface
  • the AMF and the AN device can be connected through the N2 interface
  • the AN device and the UPF can be connected through the N3 interface
  • the SMF and UPF can be connected through the N4 interface.
  • UPF and DN can be connected through the N6 interface.
  • the interface name is only an example description, and the embodiment of the present application does not specifically limit this. It should be understood that the embodiment of the present application is not limited to the communication system shown in FIG. 1, and the name of the network element shown in FIG. 1 is only used as an example here, and is not used as an architecture of a communication system applicable to the method of this application. Limitations of included network elements. The function of each network element or device in the communication system is described in detail below:
  • the terminal equipment which can also be called user equipment (UE), mobile station (MS), mobile terminal (MT), etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • the terminal device may include a handheld device with a wireless connection function, a vehicle-mounted device, a computing device, a mobile station (MS) or other processing device connected to a wireless modem, etc., as well as an or A mobile terminal that communicates with multiple core networks.
  • the terminal device may be: mobile phone (mobile phone), tablet computer, notebook computer, palmtop computer, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented Augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, smart grid (smart grid) ), the wireless terminal in the transportation safety (transportation safety), the wireless terminal in the smart city (smart city), or the wireless terminal in the smart home (smart home), or the automated guided vehicle (automated guided vehicle) , AGV), AGV controller, etc.
  • the terminal device in FIG. 1 is shown as a UE, which is only used as an example, and the terminal device is not limited.
  • the wireless access network may be an access network (access network, AN) as shown in FIG. 1, which provides wireless access services to the terminal device.
  • the access network device is a device that connects the terminal device to a wireless network in the communication system.
  • the access network device is a node in a radio access network, which may also be called a base station, or a radio access network (RAN) node (or device).
  • RAN radio access network
  • gNB transmission reception point
  • TRP transmission reception point
  • eNB evolved Node B
  • RNC radio network controller
  • Node B Node B
  • BSC base station controller
  • BTS base transceiver station
  • home base station for example, home evolved NodeB, or home Node B, HNB
  • baseband unit base Band unit, BBU
  • Wifi wireless fidelity
  • the data network such as the data network (DN) shown in FIG. 1, can be the Internet, IP Multi-media Service (IMS) network, and regional network (ie, local network, such as mobile Edge computing (mobile edge computing, MEC network), etc.
  • the data network includes an application server, and the application server provides business services for the terminal device by performing data transmission with the terminal device.
  • the core network is used to connect the terminal device to a DN that can implement the service of the terminal device.
  • the function of each network element in the core network is described below:
  • the core network access and mobility management function network element can be used to manage the access control and mobility of the terminal device. In practical applications, it includes the long term evolution (LTE) network
  • LTE long term evolution
  • the mobility management function in the mobility management entity (MME) in the framework and the access management function is added which can be specifically responsible for the registration of the terminal equipment, mobility management, tracking area update process, reachability detection, Session management function network element selection, mobile state transition management, etc.
  • the core network access and mobility management function network element may be an AMF (access and mobility management function) network element.
  • the core network The access and mobility management function network element may still be an AMF network element or have other names, which is not limited in this application.
  • the AMF may provide Namf service.
  • the session management function network element can be used to be responsible for the session management of the terminal device (including the establishment, modification and release of the session), the selection and reselection of the user plane function network element, and the internet protocol of the terminal device. , IP) address allocation, quality of service (QoS) control, etc.
  • the session management function network element may be an SMF (session management function) network element.
  • SMF session management function
  • the session management function network element may still be an SMF network element. Yuan, or other names, this application is not limited.
  • the SMF can provide the Nsmf service.
  • the policy control function network element can be used to be responsible for policy control decision-making, and provide functions such as service data flow and application detection, gating control, QoS, and flow-based charging control.
  • the policy control function network element may be a PCF (policy control function) network element.
  • the policy control function network element may still be a PCF network. Yuan, or other names, this application is not limited.
  • the PCF network element may provide the Npcf service.
  • the main function of the application function network element is to interact with the 3rd generation partnership project (3GPP) core network to provide services to influence service flow routing, access network capability opening, policy control, etc.
  • 3GPP 3rd generation partnership project
  • the application function network element may be an AF (application function) network element.
  • the application function network element may still be an AF network element, or There are other names, this application is not limited.
  • the application function network element is an AF network element, the AF network element may provide Naf services.
  • the data management network element may be used to manage subscription data of the terminal device, registration information related to the terminal device, and the like.
  • the data management network element may be a unified data management network element (unified data management, UDM).
  • UDM unified data management network element
  • the data management network element may still be UDM network elements, or other names, are not limited in this application.
  • the UDM network element may provide Nudm services.
  • the network open function network element can be used to enable 3GPP to safely provide network service capabilities to third-party AF (for example, a service capability server (Services Capability Server, SCS), application server (AS), etc.).
  • third-party AF for example, a service capability server (Services Capability Server, SCS), application server (AS), etc.
  • the network opening function network element may be a NEF (network exposure function) network element.
  • NEF network exposure function
  • the network opening function network element may still be a NEF network. Yuan, or other names, this application is not limited.
  • the network opening function network element is NEF, the NEF may provide Nnef services to other network function network elements.
  • the user plane function network element can be used to forward user plane data of the terminal device.
  • the main functions are data packet routing and forwarding, mobility anchors, and uplink classifiers to support routing traffic to the data network, branch points to support multi-homing Packet Data Unit (PDU) sessions, etc.
  • the user plane function network element may be a UPF (user plane function) network element, as shown in Figure 1, for example; in future communications, such as 6G, the user plane function network element may still be a UPF network element. Yuan, or other names, this application is not limited.
  • the authentication server function network element can be used to provide authentication services.
  • the authentication server function network element may be an (authentication server function, AUSF) network element, as shown in Figure 1, for example; in future communications, such as 6G, the authentication server function network element may still be It is an AUSF network element, or has other names, and is not limited in this application.
  • the AUSF network element may provide Nausf services.
  • the group management function network element can be used for 5GLAN group management, and dynamically create, modify, and delete a group based on the request of the terminal device.
  • the group management function network element may be a (group management function, GMF), as shown in Figure 1, for example; in future communications, such as 6G, the group management function network element may still be a GMF network. Yuan, or other names, this application is not limited.
  • the path management function network element has the function of managing user plane paths and realizing isolation between groups.
  • the path management function network element may be a (path management function, PMF), as shown in Figure 1, for example; in future communications, such as 6G, the path management function network element may still be a PMF network element. If there are other names, this application is not limited.
  • the network slice selection function network element can be used to select a suitable network slice for the service of the terminal.
  • the network slice selection function network element may be (network slice selection function, NSSF), as shown in Figure 1, for example; in future communications, such as 6G, the network slice selection function network element may still be NSSF Network elements, or have other names, are not limited in this application.
  • the network function library function network element for example, in 5G, the network function library function network element may be ((network function, NF) repository function, NRF), as shown in Figure 1, for example; in future communications, such as in 6G
  • the functional network element of the network function library may still be an NRF network element or have other names, which is not limited in this application.
  • the above network elements in the core network can also be called functional entities. They can be network elements implemented on dedicated hardware, software instances running on dedicated hardware, or instances of virtualized functions on an appropriate platform.
  • the aforementioned virtualization platform may be a cloud platform.
  • FIG. 1 the architecture of the communication system shown in FIG. 1 is not limited to only include the network elements shown in the figure, and may also include other devices not shown in the figure. The specific application will not list them here. .
  • this application will take the network element shown in FIG. 1 as an example for description, and the XX network element is directly referred to as XX. It should be understood that the names of all network elements in this application are merely examples, and may also be referred to as other names in future communications, or in future communications, the network elements involved in this application may also be used by other entities or devices with the same functions. Instead, this application does not limit this. Here is a unified explanation, and I won’t repeat it in the following.
  • the communication system shown in FIG. 1 does not constitute a limitation of the communication system applicable to the embodiments of the present application.
  • the communication system architecture shown in FIG. 1 is a 5G system architecture.
  • the method in the embodiment of the present application is also applicable to various future communication systems, such as 6G or other communication networks.
  • the architecture of a possible communication system to which the mobility management method provided in the application embodiment is applicable can also be shown in FIG. 2 and FIG. 3.
  • the UP that is, the UPF
  • the CP sinks near the access device (RAN)
  • the CP is deployed in a relatively concentrated position
  • the UP and the UP, and the CP and the UP are connected through a switching network.
  • the functions of CP and UP in the architecture shown in Figure 2 and Figure 3 can be defined by the protocol 3GPP TS 23.501, where 3GPP CP can include functional entities (functional network elements) such as AMF, SMF, UDM, etc.
  • the function is to authenticate the UE. Rights authentication, access and mobility management, etc.
  • UP is the 3GPP core network user plane function network element, the main function user plane anchor point, provides external access.
  • the switching network is composed of Ethernet switching, which provides accessibility between 3GPP network elements and access to fixed equipment.
  • the UP sinks near the RAN as shown in Figure 2.
  • the RAN and UP may be combined into one device, which can be called a converged access device (converged RAN) (merged RAN, M-RAN) (the co-located device involved in this application is a converged access device), and UP is not presented separately, as shown in FIG. 3.
  • converged RAN converged access device
  • M-RAN the co-located device involved in this application is a converged access device
  • the mobility management method provided by the embodiment of the present application is applicable to the communication system shown in FIG. 1 and FIG. 2 or FIG. 3.
  • the specific process of the method may include:
  • Step 401 After the first terminal device moves, the control plane network element determines the changed MAC address of the first terminal device.
  • the control plane network element decides to update the MAC address of the first terminal device, determines the changed MAC address of the first terminal device, and notifies the The first terminal device and other terminal devices in the same terminal device group as the first terminal device update the changed MAC address of the first terminal device.
  • control plane network element determines that the changed MAC address of the first terminal device is specifically that the control plane network element allocates a new MAC address to the first terminal device (that is, after the first terminal device is changed) MAC address).
  • the control plane network element may be SMF.
  • Step 402 The control plane network element determines at least one second terminal device that belongs to the same terminal device group as the first terminal device, where the first terminal device is a terminal device whose address changes after moving, The at least one second terminal device is a terminal device other than the first terminal device in the terminal device group.
  • control plane network element determines that the at least one second terminal device belongs to the same terminal device group as the first terminal device.
  • the specific method may be: the control The plane network element queries the member information of the terminal device group where the first terminal device is located from the group management function network element, and the member information includes the identities of all terminal devices included in the terminal device group; the control plane The network element determines the at least one second terminal device according to the member information.
  • control plane network element when the control plane network element queries the member information of the terminal device group where the first terminal device is located from the group management function network element, it may specifically be: the control plane network element requests the group management function The network element sends a member information query request, and the member information query request carries the identity of the first terminal device; the group management function network element determines where the first terminal device is located according to the identity of the first terminal device And then return the member information to the control plane network element.
  • the member information may also include a PDU session identifier corresponding to each terminal device in the terminal device group.
  • the address of the terminal device involved may be an IP address, or a MAC address, or an IP address and a MAC address.
  • Step 403 The control plane network element notifies the first terminal device and the at least one second terminal device to update the changed MAC address of the first terminal device.
  • control plane network element notifies the first terminal device to update the changed MAC address of the first terminal device, which can be divided into the following two situations:
  • Case a1 The control plane network element sends first address update information to the first terminal device through the first device, and the first address update information includes the changed MAC address of the first terminal device;
  • the first device is a target access device after the first terminal device moves.
  • the MAC address is updated through the control plane.
  • Case a2 The control plane network element sends second address update information to the first terminal device through the second device, and the second address update information includes the changed MAC address of the first terminal device;
  • the second device is a target user plane function network element after the first terminal device moves, or the second device is a target co-located device after the first terminal device moves, wherein the target co-located device It is a device that is combined with the access device and the user plane function network element.
  • the address is updated through the user interface.
  • the second device is the target user plane function network element; There is no separate user plane function network element in the communication system where the terminal device is located, and when the user plane function network element and the access device are combined into one device (for example, the communication system shown in FIG. 3), the second device is all The target joint equipment.
  • the control plane network element when the control plane network element sends the first address update information to the first terminal device through the first device, it may first send the first address update information to the core network interface. Access and mobility management function network element, the core network access and mobility management function network element forwards the first address update information to the first device, and then the first device to the first device A terminal device initiates an RRC connection re-establishment request (carrying the first address update information), requesting the first terminal device to update the MAC address. The first terminal device updates its own MAC address cache, and records the changed MAC address of the first terminal device.
  • the first address update information may further include the identity of the first terminal and the original MAC address of the first terminal device.
  • the control plane network element may construct a user plane message, such as a broadcast address resolution protocol (ARP) message, or a unicast ARP message, or other private MAC layer messages.
  • the control plane network element carries the second address update information through the foregoing message or message.
  • the control plane network element may send the message or message constructed as described above through an N4 request message; then the target user plane function The network element sends the message or message constructed by the control plane network element to the first terminal device; finally, the first terminal device updates its own MAC address cache and records the changed MAC address of the first terminal device.
  • the control plane network element may first send the control plane network element to the core network access and mobility management function network element
  • the above-mentioned message or message (for example, it can be sent by N1 message or N2 message) constructed by the element is forwarded to the target co-located device by the core network access and mobility management function network element, and the target co-located device Sent to the first terminal device, and then the first terminal device updates its own MAC address cache and records the changed MAC address of the first terminal device.
  • the second address update information may also include the identity of the first terminal and the original MAC address of the first terminal device.
  • control plane network element notifies any second terminal device to update the changed MAC address of the first terminal device, which can be divided into the following three situations:
  • the control plane network element sends a message to the any second terminal device through the access device currently accessed by the any second terminal device.
  • the terminal device sends third address update information, where the third address update information includes the changed MAC address of the first terminal device.
  • the MAC address is updated through the control plane.
  • Case b2 When any second terminal device is a terminal device accessed through a fixed network, the control plane network element sends fourth address update information to the any second terminal device through a network open function network element, so The fourth address update information includes the changed MAC address of the first terminal device. In this case, the MAC address is updated through the control plane.
  • Case b3 The control plane network element sends fifth address update information to any one of the second terminal devices through a third device, where the fifth address update information includes the changed MAC address of the first terminal device;
  • the third device is a user plane function network element currently accessed by any of the second terminal devices, or the third device is a co-located device currently accessed by any of the second terminal devices, so
  • the said co-located device is a device where the access device and the user plane function network element are co-located.
  • the address is updated through the user interface.
  • the third device is currently accessed by any of the second terminal devices.
  • the third device is a co-located device currently accessed by any of the second terminal devices.
  • the method in which the control plane network element sends the third address update information to the any second terminal device through the access device currently accessed by the any second terminal device is the same as in the above situation a1
  • the method for the control plane network element to send the first address update information to the first terminal device through the first device is similar.
  • the same third address update information may also include the identity of the first terminal and the original MAC address of the first terminal device.
  • control plane network element when the control plane network element sends the fourth address update information to any of the second terminal devices through the network open function network element, it may specifically be that the control plane network element first sends the first Four address update information is sent to the network open function network element, and then the network open function network element determines the application function network element corresponding to any one of the second terminal devices, and the application function network element sets the fourth address The update information is sent to any one of the second terminal devices, and then the application function network element and any one of the second terminal devices update the cached address of the first terminal device to that after the first terminal device changes MAC address.
  • the method for the control plane network element to send the fourth address update information to any of the second terminal devices through the network opening function network element is the same as the control plane network element in the above case a2.
  • the method for the second device to send the second address update information to the first terminal device is similar.
  • any second terminal device may be a terminal device on the DN side.
  • the control plane network element after the control plane network element notifies all terminal devices in the terminal device group to update the changed MAC address of the first terminal device, the control plane network element The process of releasing the original MAC address of the first terminal device is also initiated, where the original MAC address of the first terminal device is the MAC address of the first terminal device before moving. This can release system resources and save resource space.
  • the control plane network element determines the changed MAC address of the first terminal device, and then determines that it belongs to the same one as the first terminal device At least one second terminal device in the terminal device group, wherein the first terminal device is a terminal device whose address changes after moving, and the at least one second terminal device is a terminal device in the terminal device group except for the first terminal device.
  • the control plane network element notifies the first terminal device and the at least one second terminal device to update the changed MAC address of the first terminal device.
  • the mobility management method provided in the present application will be exemplified below through specific examples.
  • the devices and network elements involved in the following examples are all described by specific examples.
  • the terminal device is a UE
  • the user plane function network element is a UPF
  • the access device is a RAN.
  • An example of a mobility management method provided by an embodiment of the present application is applied to the communication system shown in FIG. 1 and FIG. 2 and mainly describes the process of assigning the MAC address of the terminal device when the terminal device is initialized. Specifically, referring to Figure 5, the process of this example can be:
  • Step 501 The UE initiates an Ethernet type PDU session establishment request.
  • the UE when the UE performs step 501, it may specifically be that the UE sends the PDU session establishment request to the AMF. At this time, the PDU session establishment request does not carry the MAC address.
  • the PDU session request may be a PDU session establisnment request sent by the UE to the AMF.
  • Step 502 After receiving the PDU session establishment request, the AMF selects the corresponding SMF, and sends the PDU session establishment request message to the selected SMF.
  • Step 503 The SMF requests the user's subscription information from the UDM.
  • step 503 The specific process of step 503 is that the SMF sends a subscription information request to the UDM, and then the UDM returns the subscription information to the SMF.
  • Step 504 The SMF initiates UE authentication and authentication procedures.
  • Step 505 After the authentication is passed, the SMF finds that the UE needs to establish an Ethernet type PDU session, the SMF selects an appropriate UPF, and allocates a MAC address for the UE (or session).
  • Step 506 The SMF sends an N4 session establishment request to the UPF.
  • the N4 session establishment request carries the MAC address to instruct the UPF to select the correct N4 session to forward the Ethernet frame when receiving the downlink message.
  • Step 507 The SMF returns a PDU session establishment accept message to the AMF, and the PDU session establishment accept message carries the MAC address allocated for the UE.
  • Step 508 The AMF sends a PDU session establishment request (NAS message) to the RAN, carrying the MAC address allocated for the UE.
  • NAS message PDU session establishment request
  • the PDU session establishment request may be N2 PDU session request.
  • Step 509 The RAN establishes a session connection with the UPF, and initiates a radio access network-related resource reservation request to the UE.
  • the resource reservation request may include a PDU session establishment grant and accept message, and Carry the MAC address allocated by the CP for the UE.
  • the resource reservation request may be an AN-specific resource set up request sent by the RAN to the UE.
  • Step 510 The UE reserves AN resources, establishes a PDU session, and saves the MAC address allocated by the SMF.
  • Step 511 The UE sends an access network-related resource reservation response to the RAN.
  • the resource reservation response may be AN-specific resource set up response.
  • Step 512 The RAN and CP complete the subsequent session establishment procedure.
  • the embodiments of the present application provide an example of a mobility management method, which is applied to the communication system shown in FIG. 1 and FIG. 3, and mainly describes the process of allocating the MAC address of the terminal device when the terminal device is initialized. .
  • the process of this example can be:
  • Step 601 M-RAN (a base station that integrates some functions of UPF) registers its own capabilities with AMF.
  • the purpose of the step 601 is to inform the AMF that it does not need to select a UPF and does not need to perform a UPF-related session establishment operation.
  • Step 602 The UE initiates an Ethernet type PDU session establishment request.
  • the UE sends the PDU session establishment request to the AMF through the M-RAN. That is, the UE first sends the PDU session establishment request to the M-RAN, and then the M-RAN sends the PDU session establishment request to the AMF.
  • Step 603 After receiving the PDU session establishment request, the AMF finds that the PDU session establishment request comes from the M-RAN, and determines that the UE currently accesses the M-RAN.
  • Step 604 The AMF selects an SMF, and sends the PDU session establishment request to the selected SMF.
  • the PDU session establishment request may carry indication information, indicating that the RAN integrates the UPF function, and only the SMF is required to perform functions such as QoS, authentication, and address allocation.
  • Step 605 The SMF initiates UE authentication and authentication procedures.
  • Step 606 The SMF obtains UE and QoS policy from UDM and PCF.
  • Step 607 After the authentication is passed, the SMF finds that the UE needs to establish an Ethernet type PDU session, and allocates a MAC address for the UE (or session).
  • Step 608 The SMF initiates a PDU session establishment request to the M-RAN and the UE. Specifically, the SMF sends the PDU session establishment request to the AMF, and the PDU session establishment request carries the MAC address allocated to the UE.
  • the SMF may send the PDU session establishment request to the N1/N2 message transfer sent by the SMF to the AMF.
  • Step 609 After receiving the SMF message, the AMF sends the PDU session establishment request to the M-RAN through the N2 interface, and the PDU session establishment request may carry the downstream classification rules and QoS Profile, and Carries the MAC address assigned to the UE.
  • Step 610 After receiving the MAC address of the UE, the M-RAN establishes the corresponding relationship between the UE MAC address and the UE ID (such as RNTI), creates an SDAP instance, creates QFI and SRB, and establishes a mapping relationship between QFI and DRB. Save the QoS Flow Template on the RAN user plane, classify the downlink data flow, and mark QFI.
  • the UE ID such as RNTI
  • the M-RAN When the downlink data arrives, the M-RAN first finds the corresponding UE ID and SDAP according to the destination address, then marks the QFI through flow classification, and hands it to the SDAP for processing.
  • Step 611 The M-RAN sends an RRC connection reconfiguration request to the UE, and the RRC connection reconfiguration request carries the PDU session establishment request sent by the SMF to the UE, wherein the PDU session establishment The request includes the MAC address allocated for the UE.
  • Step 612 The UE establishes a PDU session and saves the MAC address allocated by the SMF to complete the subsequent session establishment process.
  • control plane network element involved in step 401 in the embodiment shown in FIG. 4 decides to update the MAC address of the first terminal device and allocates a new MAC address to the first terminal device.
  • the method refer to the method of assigning a MAC address to the UE in the example shown in FIG. 5 or FIG. 6 above.
  • UE1 is a mobile UE
  • UE2 is a peer terminal device communicating with the UE1 as an example for description.
  • the UE1 may be an AGV
  • the UE2 may be an AGV control Device.
  • the process of this example can be:
  • Step 701 UE1 has moved, and the CP (SMF) allocates a new MAC address for it.
  • Step 702 The SMF sends a group member information query request to the GMF.
  • the group member information query request is used to request other member information of the group (LAN) where the UE1 is located, and the query group member information request carries UE1ID.
  • Step 703 The GMF queries the group (LAN) to which the UE1 belongs, and returns a query group member information response to the SMF, wherein the query group member information response includes a group (LAN) member list (UE ID) list), may also include the PDU session ID corresponding to each UE in the group.
  • the UE ID of a terminal device connected through a fixed network may be an IP address or a MAC address, or an IP address and a MAC address, which is not limited in this application.
  • the subsequent method for updating the MAC address cache of group members can be specifically divided into two methods: Method 1, updating the MAC address through the control plane, specifically, the SMF initiates the MAC address to the RAN and the UE through a new signaling message Cache update.
  • This method needs to extend new NAS and AS messages.
  • Method two update the MAC address through the user plane, specifically, the SMF can update the MAC through the user plane broadcast message Address caching, such as initiating an ARP broadcast (for a UE with an IP address), or extending a new message at the MAC layer.
  • steps 714 to 731 For details of the method flow, see the following steps 714 to 731. It should be noted that the above method 1 and method 2 can be used at the same time according to actual conditions, which is not limited in this application.
  • SMF when UE1 and other UEs access through 3GPP, after SMF obtains the group member information, it can query the SM context to find the RAN that the corresponding UE currently accesses.
  • the SMF sends a MAC address cache update message to the RAN, and the message carries the new MAC address and the original MAC address.
  • the message may be RAN granular (sent to the RAN through N2 access to tell the RAN which UE's MAC address buffers need to be updated), or UE granular (sent directly to the UE through the N1 interface, at this time the RAN is transparent to the message ).
  • the steps may be steps 704-710.
  • Step 704 The SMF sends a MAC address cache update message to the AMF, where the MAC address cache update message carries the new MAC address and the original MAC address of UE1.
  • Step 705 The AMF sends a MAC address cache update message to RAN1.
  • the MAC address cache update message in step 705 corresponds to the first address update information in the embodiment shown in FIG. 4.
  • Step 706 The AMF sends MAC address cache update messages to other RANs respectively.
  • the other RAN is the RAN currently accessed by the other UE. Specifically, when there are multiple other UEs, the other RAN is one or more. Optionally, the other RAN is One RAN may be the same as RAN1, and other RANs are used in this embodiment for convenience.
  • Step 707 The RAN 1 sends an RRC connection re-establishment request to the UE 1 to request the UE 1 to update the MAC address buffer, and the RRC connection re-establishment request carries the ID of the UE 1 and the new MAC of the UE 1 Address and original MAC address.
  • Step 708 The UE 1 updates its MAC address cache and records the new MAC address.
  • Step 709 The other RAN sends an RRC connection re-establishment request to the other UE for requesting the other UE to update the MAC address buffer.
  • the RRC connection re-establishment request carries the ID of UE 1 and the new ID of UE 1. MAC address and original MAC address.
  • Step 710 The other UE updates its own MAC address cache and records the new MAC address of the UE1.
  • SMF finds the NEF corresponding to UE2 and sends a MAC address cache update message to NEF.
  • the MAC address cache update message carries the new MAC address of UE1 and the original MAC address. .
  • the specific steps may be step 711 to step 713.
  • Step 711 The SMF sends a MAC address cache update message to the NEF, and the MAC address cache update message carries the new MAC address of the UE 1 and the original MAC address.
  • Step 712 The NEF determines the AF corresponding to UE2, and forwards the MAC address cache update message to the AF.
  • Step 713 The AF and the UE 2 complete the MAC address cache update.
  • the SMF constructs a user plane message (that is, an address MAC address update cache message), such as a broadcast message ARP, or a unicast ARP response message, or other private MAC layer messages, and the message carries the ID of UE1 (Such as IP address, or device name), and its corresponding new MAC address. It can be divided into the following examples according to the presence or absence of URF:
  • step 714 if there is UPF in the network, refer to step 714 to step 722:
  • Step 714 The SMF sends a MAC address update message to UPF1, which carries the constructed user plane message.
  • the UPF 1 is the target UPF after the UE 1 moves.
  • the MAC address update message may be an N4 request message.
  • Step 715 The SMF sends a MAC address update message to other UPFs.
  • the other UPF is the UPF currently accessed by the other UE. Specifically, when there are multiple other UEs, the other UPF is one or more. Optionally, the other UPF is One UPF may be the same as UPF 1, and other UPFs are used in this embodiment for convenience.
  • Step 716 The SMF sends a MAC address update message to UPF2.
  • the UPF2 is the UPF currently accessed by the UE2.
  • Step 717 The UPF 1 sends a MAC address update message to the UE 1.
  • Step 718 The UE 1 updates its own MAC address cache and records the new MAC address.
  • Step 719 The other UPF sends a MAC address update message to the other UE.
  • Step 720 The other UE updates its own MAC address cache and records the new MAC address of the UE1.
  • Step 721 The UPF 2 sends a MAC address update message to the UE 2.
  • Step 722 The UE 2 updates its MAC address cache, and records the new MAC address of the UE 1.
  • step 723-step 731 if there is no UPF in the network, and RAN and UPF are combined into one device M-RAN, refer to step 723-step 731:
  • Step 723 The SMF sends a request message to the M-RAN 1 through the AMF for requesting MAC address update, and carries the constructed user plane message.
  • the request message may be an N1 interface message or an N2 interface message.
  • the M-RAN 1 is the M-RAN that the UE 1 currently accesses.
  • Step 724 The SMF sends a request message to other M-RANs through the AMF.
  • the other M-RAN is the M-RAN currently accessed by the other UE. Specifically, when there are multiple other UEs, the other M-RAN is one or more, which is optional, One M-RAN of the other M-RANs may be the same as M-RAN 1, and for convenience, other M-RANs are shown in this embodiment.
  • Step 725 The SMF sends a request message to the M-RAN 2 through the AMF.
  • the M-RAN 2 is the M-RAN that the UE 2 currently accesses.
  • Step 726 The M-RAN 1 sends a MAC address update message to the UE 1.
  • Step 727 The UE 1 updates its MAC address cache and records the new MAC address.
  • Step 728 The other M-RAN sends a MAC address update message to the other UE.
  • Step 729 The other UE updates its own MAC address cache and records the new MAC address of the UE1.
  • Step 730 The M-RAN 2 sends a MAC address update message to the UE 2.
  • Step 731 The UE 2 updates its MAC address cache, and records the new MAC address of the UE 1.
  • the UE 2 can be regarded as a device on the DN side.
  • the embodiments of the present application provide an example of a mobility management method, which can be applied to the communication system shown in FIG. 1 and FIG. 2.
  • a possible method of MAC address reallocation in the process of mobile handover (UPF change) is described for the situation where a new session needs to be established (similar to 3GPP Release 15 Service Continuity Mode 3 (SSC Mode 3)).
  • SMF change 3GPP Release 15 Service Continuity Mode 3
  • SSC Mode 3 3GPP Release 15 Service Continuity Mode 3
  • the specific scenario of this example is that the MAC address of the UE is reassigned by SMF, and both the UE 1 (for example, the AGV) and the UE 2 (for example, the AGV controller) access through the 3GPP network.
  • the process of this example can be:
  • Step 801 UE1 initiates an Ethernet type PDU session, using the method described in the example shown in FIG. 5, UE1 obtains its assigned MAC address from SMF, and UE1 establishes communication with UE2.
  • Step 802 The UE1 moves to a new location and reports the measurement result.
  • Step 803 S RAN judges that the handover threshold is reached, and initiates a handover request to AMF.
  • the handover request may be a handover request sent by the S RAN to the AMF.
  • Step 804 The AMF initiates a PDU session update request to the SMF, and the PDU session update request carries the location information of the UE1.
  • Step 805 The SMF determines that the UPF needs to be replaced.
  • Step 806 The SMF sends a PDU session redirection request to UE1, requesting UE1 to initiate a new PDU session, and rejects the handover request initiated by SRAN in the PDU session redirection request.
  • the SMF when the SMF performs step 806, the SMF sends the PDU session redirection request to the AMF, the AMF forwards the PDU session redirection request to the SRAN, and then the SRAN The UE 1 forwards the PDU session redirection request.
  • Step 807 The UE 1 initiates a new PDU session of the Ethernet type. Using the method described in the example shown in FIG. 5, the UE 1 obtains the new MAC address allocated to it from the SMF.
  • Step 808 The SMF initiates the MAC address cache update process.
  • the implementation method refer to the process in the example shown in FIG. 7.
  • the step 808 may be performed, or the step of notifying the UE 1 to update the MAC address involved in the embodiment shown in FIG. 7 may not be performed, which is not limited in this application.
  • Step 809 After receiving all the MAC address update result messages sent by the RAN, the SMF initiates a PDU session release process to release the original MAC address of the UE1.
  • the embodiments of the present application provide an example of a mobility management method, which can be applied to the communication system shown in FIG. 1 and FIG. 2.
  • a mobility management method which can be applied to the communication system shown in FIG. 1 and FIG. 2.
  • another possible method of MAC address reallocation in the process of mobile handover is described.
  • the process of this example can be:
  • Step 901 UE1 initiates an Ethernet-type PDU session, and using the method described in the example shown in FIG. 5, the UE obtains its assigned MAC address from the SMF. UE1 and UE2 establish communication.
  • Step 902 UE1 moves to a new location and reports the measurement result.
  • Step 903 S RAN judges that the handover threshold is reached, and initiates a handover request to AMF.
  • Step 904 The AMF initiates a PDU session update request to the SMF, and the PDU session update request carries the location information of the UE1.
  • Step 905 The SMF determines that the UPF needs to be replaced.
  • Step 906 The SMF allocates a new MAC address of the UE 1 based on the new UPF (T UPF).
  • Step 907 The SMF initiates a PDU session establishment request to TUPF, establishes a forwarding tunnel from SUPF to TUPF, and establishes a tunnel from TUPF to TRAN.
  • the PDU session establishment request carries the newly allocated MAC address.
  • the TUPF After receiving the PDU session establishment request, the TUPF establishes the MAC address (to the TRAN) downlink tunnel mapping relationship.
  • Step 908 The SMF initiates a PDU session establishment request to the S UPF, establishes a forwarding tunnel to the new UPF, and sets an indirect forwarding rule to forward the downlink service to the UE 1 to the T UPF.
  • Step 909 The SMF sends a PDU session update response message to the AMF.
  • Step 910 The AMF sends a handover request message to the TRAN, and the handover request message carries the tunnel information of the TUPF.
  • Step 911 The TRAN judges to accept the handover request, establishes a two-way tunnel to the TUPF, and returns a handover request confirmation message to the AMF.
  • the handover request confirmation message carries tunnel information of the TRAN.
  • Step 912 The AMF sends a PDU session update request to the SMF again, and the PDU session update request carries the tunnel information of the TRAN.
  • Step 913 The SMF sends a PDU session modification request to the TUPF, and the PDU session modification request carries the tunnel information of the TRAN.
  • the SMF establishes a bidirectional forwarding tunnel to the TRAN.
  • Step 914 The SMF sends a PDU session update response message to the AMF for notifying the AMF that the UPF side is ready.
  • Step 915 The AMF sends a handover command to the UE1 through the SRAN, and the handover command carries the new MAC address allocated for the UE1.
  • Step 916 After receiving the handover command, the UE1 disconnects the RRC connection with the SRAN, establishes an RRC connection with the TRAN, and replaces the MAC address with a new MAC address. The UE 1 still receives the message sent to the original MAC address at the same time.
  • Step 917 The UE 1 sends a handover confirmation message to the TRAN.
  • Step 918 The TRAN sends a handover notification message to the AMF.
  • Step 919 The AMF sends a PDU session update request to the SMF.
  • Step 920 SMF initiates a new MAC address cache update procedure of UE1.
  • SMF initiates a new MAC address cache update procedure of UE1.
  • UE1 For details, refer to the process in the example shown in FIG. 7.
  • Step 921 The SMF sends a PDU session modification request to the TUPF, and the PDU session modification request carries the original MAC address. After T UPF receives the PDU session modification request, it deletes the connection with S UPF and deletes the forwarding rules related to the original MAC address.
  • Step 922 The SMF sends a PDU session deletion request to the S UPF to delete session resources related to the UE1.
  • the embodiments of the present application provide an example of a mobility management method, which can be applied to the communication systems shown in FIG. 1 and FIG. 3.
  • the MAC address update process in the mobile handover process is described.
  • the process of this example can be:
  • Step 1001 UE 1 switches from S M-RAN to T M-RAN.
  • Step 1002 The T M-RAN sends a path switch request message to the AMF.
  • Step 1003 The AMF judges that the RAN is integrated with UPF (that is, M-RAN), and then forwards the path switch request message to the SMF, and carries the merged RAN (no UPF) indication information in the forwarded path switch request message.
  • UPF that is, M-RAN
  • Step 1004 Based on the current network architecture, the SMF determines that the UE 1 has changed the address segment (that is, the MAC address changes), and then re-allocates a new MAC address for the UE 1 based on the current location.
  • the SMF determines that the UE 1 has changed the address segment (that is, the MAC address changes), and then re-allocates a new MAC address for the UE 1 based on the current location.
  • Step 1005 The SMF sends a MAC address reallocation request to the T M-RAN through the AMF, and the MAC address reallocation request carries the UE 1 ID and the new MAC address.
  • Step 1006 The T M-RAN sends an RRC connection reconfiguration message to the UE 1 to save the new MAC address.
  • Step 1007 The UE 1 saves the new MAC address and uses the new MAC address in subsequent uplink messages, but the downlink simultaneously receives the original and new two MAC addresses.
  • Step 1008 The SMF initiates the UE 1 MAC address cache update process.
  • the SMF initiates the UE 1 MAC address cache update process.
  • Step 1009 The SMF returns a path switching complete message to the AMF.
  • Step 1010 The AMF sends a path switching complete message to the T M-RAN.
  • Step 1011 The TM-RAN sends a UE1 context release message to the SM-RAN, indicating that the handover is complete.
  • Step 1012 After the S M-RAN finishes forwarding the data message, it sends an End Marker (End Marker) indication to the T M-RAN.
  • End Marker End Marker
  • Step 1013 The TM-RAN sends an RRC connection reconfiguration message to UE1 to delete the original MAC address of UE1.
  • the handover event can also be notified to the AMF during the handover preparation phase, such as step 3 to step 7 shown in Figure 11; initiate immediately after the establishment of the new RRC Path Switch, for example, step 12 to step 13 shown in FIG. 11.
  • the specific process can be:
  • Step 1101 UE 1 continuously measures the signal strength and information quality of the main serving cell and neighboring cells.
  • Step 1102 The S M-RAN detects that the quality of the neighboring cell is better than the current cell, and sends a handover request to the neighboring cell (T M-RAN).
  • Step 1103 The neighboring cell (T M-RAN) decides to accept the handover request and sends a UE handover event to the AMF.
  • the UE handover event carries the UE 1 ID, S M-RAN ID, and T M-RAN ID.
  • Step 1104 The AMF sends a handover event to the SMF, and the handover event carries the UE 1ID, S M-RAN ID, and T M-RAN ID.
  • Step 1105 Based on the current network architecture, the SMF determines that the UE has changed the address segment (that is, the MAC address has changed), and then re-allocates a new MAC address for the UE 1 based on the current location.
  • the SMF determines that the UE has changed the address segment (that is, the MAC address has changed), and then re-allocates a new MAC address for the UE 1 based on the current location.
  • Step 1106 The SMF sends a MAC address reallocation indication to the AMF, and the MAC address reallocation indication carries the new MAC address of UE1.
  • Step 1107 The AMF sends a handover event confirmation message to the TM-RAN, and the handover event confirmation message carries a MAC address redistribution indication, as well as the UE 1 ID, S M-RAN ID, source MAC address, and new MAC address.
  • Step 1108 The T M-RAN sends a handover confirmation message to the S M-RAN, and the handover confirmation message carries the CP to allocate a new MAC address for the UE.
  • Step 1109 The S M-RAN sends a handover command to the UE 1, and the handover command carries the new MAC address allocated by the CP to the UE 1.
  • Step 1110 S M-RAN forwards data and SN number to T M-RAN.
  • Step 1111 The UE1 disconnects from the SM-RAN and initiates a random access procedure to the TM-RAN. UE1 saves the new MAC address, and subsequently uses the new address in the uplink message, but the downlink simultaneously receives the message with the original and new MAC addresses.
  • Step 1112 The T M-RAN sends a path switching request to the SMF.
  • Step 1113 The SMF sensing air interface handover is completed, and then the UE 1 MAC address cache update process is initiated.
  • the implementation method reference may be made to the process in the example shown in FIG. 7, which will not be repeated here.
  • Step 1114 The path switching is completed, and the S M-RAN releases the UE1 context and clears the buffered data.
  • Step 1115 T M-RAN sends an RRC reconfiguration request to UE 1 to delete the original MAC address of UE 1, and UE 1 no longer receives packets sent to the original MAC address.
  • the UE uses the address of the source base station 44-45-53-54-00-11, and the buffer of the AGV controller (such as ARP buffer) ), record the current MAC address of the UE (AGV) as 44-45-53-54-00-11.
  • the AGV controller uses this address as the destination MAC address of the Ethernet frame sent to the AGV.
  • the service path before handover may be as shown in Fig. 12a.
  • the UE uses the address 44-45-53-54-01-11 allocated by the target base station.
  • the 3GPP network informs the AGV controller of the updated address cache through NAS signaling messages, and updates the MAC address of the AGV in the cache to 44-45-53-54-01-11. Subsequent messages sent to the AGV will use this address as the destination MAC address.
  • the service path before handover may be as shown in Fig. 12b. Through this example, it can be known that after the terminal device moves, only the MAC address of the terminal device needs to be changed, and the MAC forwarding table in the switching network does not need to be updated, so that path switching can be implemented flexibly and business continuity can be ensured.
  • control plane network element 1300 may include: a processing unit 1301 and a transceiver unit 1302, where:
  • the processing unit 1301 is configured to determine the changed media access control address MAC address of the first terminal device after the first terminal device moves; and determine that the first terminal device belongs to the same terminal device group At least one second terminal device, wherein the first terminal device is a terminal device whose address changes after moving, and the at least one second terminal device is a terminal other than the first terminal device in the terminal device group equipment;
  • the transceiving unit 1302 is configured to notify the first terminal device and the at least one second terminal device to update the changed MAC address of the first terminal device.
  • the processing unit 1301 determines that the at least one second terminal device belongs to the same terminal device group as the first terminal device, it is specifically configured to: manage from the group The functional network element queries the member information of the terminal device group where the first terminal device is located, where the member information includes the identities of all the terminal devices included in the terminal device group; and determines the at least one first terminal device according to the member information. Two terminal equipment.
  • the transceiving unit 1302 when it notifies the first terminal device to update the changed MAC address of the first terminal device, it is specifically configured to: The device sends first address update information, where the first address update information includes the changed MAC address of the first terminal device; wherein, the first device is the target access device after the first terminal device moves; Or, sending second address update information to the first terminal device through a second device, where the second address update information includes the changed MAC address of the first terminal device; wherein, the second device is the The target user plane function network element after the first terminal device moves, or the second device is the target co-located device after the first terminal device moves, wherein the target co-located device is an access device and a user plane Equipment that is co-located with functional network elements.
  • the transceiver unit 1302 when any second terminal device is a terminal device accessed through a 3GPP network, the transceiver unit 1302 is notifying any second terminal device to update the first terminal device When the changed MAC address is used, it is specifically used to: send the third address update information to the any second terminal device through the access device currently accessed by the any second terminal device, the third address update information Including the changed MAC address of the first terminal device.
  • the transceiver unit 1302 when any second terminal device is a terminal device accessed through a fixed network, the transceiver unit 1302 is notifying any second terminal device to update the first terminal device When the changed MAC address is used, it is specifically used to: send fourth address update information to any of the second terminal devices through the network opening function network element, where the fourth address update information includes the changed address of the first terminal device MAC address.
  • the transceiver unit 1302 when it notifies any second terminal device to update the changed MAC address of the first terminal device, it is specifically configured to: The second terminal device sends fifth address update information, where the fifth address update information includes the changed MAC address of the first terminal device; wherein, the third device is currently accessed by any of the second terminal devices Or, the third device is a co-located device currently accessed by any of the second terminal devices, and the co-located device is a device co-located with the access device and the user-plane functional network element .
  • the processing unit 1301 is further configured to: initiate a release procedure of the original MAC address of the first terminal device, wherein the original MAC address of the first terminal device is the first terminal device MAC address before moving.
  • the embodiments of the present application also provide a first terminal device, and the first terminal device is used to implement the mobility management method shown in FIGS. 4-11.
  • the first terminal device 1400 may include: a transceiver unit 1401 and a processing unit 1402, where:
  • the transceiving unit 1401 is configured to obtain a notification to update the MAC address of the first terminal device from the control plane network element; the processing unit 1402 is configured to update the MAC address to the MAC address of the first terminal device after the change address.
  • the transceiver unit 1401 when it obtains a notification from the control plane network element to update the changed MAC address of the first terminal device, it is specifically configured to: receive the control plane network element The first address update information sent by the first device, where the first address update information includes the changed MAC address of the first terminal device; wherein, the first device is the target after the first terminal device moves Access device; or, receiving second address update information sent by the control plane network element through a second device, where the second address update information includes the changed MAC address of the first terminal device; wherein, the first terminal device The second device is the target user plane function network element after the first terminal device moves, or the second device is the target co-located device after the first terminal device moves, wherein the target co-located device It is a device that is combined with the access device and the user plane function network element.
  • the embodiments of the present application also provide a second terminal device, which is used to implement the mobility management method as shown in FIGS. 4-11.
  • the second terminal device 1500 may include: a transceiver unit 1501 and a processing unit 1502, where:
  • the transceiving unit 1501 is configured to obtain a notification to update the changed MAC address of the first terminal device from the control plane network element; the processing unit 1502 is configured to update the cached address of the first terminal device to the The changed MAC address of the first terminal device.
  • the transceiving unit 1501 obtains an update from the control plane network element and the first terminal device changes
  • the subsequent MAC address notification is specifically used to: receive the third address update information sent by the control plane network element through the access device currently accessed by the second terminal device, where the third address update information includes all The changed MAC address of the first terminal device.
  • the transceiving unit 1501 obtains an update from the control plane network element and the first terminal device changes When the latter MAC address is notified, it is specifically used to: receive the fourth address update information sent by the session management function network element through the network opening function network element, where the fourth address update information includes the changed first terminal device MAC address.
  • the transceiving unit 1501 when it obtains a notification from the control plane network element to update the changed MAC address of the first terminal device, it is specifically configured to: receive the control plane network The fifth address update information sent by the third device through the third device, where the fifth address update information includes the changed MAC address of the first terminal device; wherein, the third device is the current access of the second terminal device Or, the third device is a co-located device currently accessed by the second terminal device, and the co-located device is a device in which the access device and the user-plane functional network element are co-located.
  • the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • the functional units in the embodiments 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 computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including a number of instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to 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, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .
  • the embodiments of the present application also provide a control plane network element, and the control plane network element is used to implement the mobility management method as shown in FIGS. 4-11.
  • the control plane network element 1600 includes: may include a transceiver 1601 and a processor 1602, and optionally may also include a memory 1603.
  • the processor 1602 may be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP, or the like.
  • the processor 1602 may further include a hardware chip.
  • the aforementioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • ASIC application-specific integrated circuit
  • PLD programmable logic device
  • the above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.
  • CPLD complex programmable logic device
  • FPGA field-programmable gate array
  • GAL generic array logic
  • the transceiver 1601 and the processor 1602 are connected to each other.
  • the transceiver 1601 and the processor 1602 are connected to each other through a bus 1604;
  • the bus 1604 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. .
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in FIG. 16, but it does not mean that there is only one bus or one type of bus.
  • control plane network element 1600 executes the mobility management method of the embodiment shown in FIG. 4 to FIG. 11, it specifically includes:
  • the transceiver 1601 is used to communicate and interact with other devices and send and receive data.
  • the processor 1602 is configured to, after the first terminal device moves, determine the changed media access control address MAC address of the first terminal device; determine that the first terminal device belongs to the same terminal device group At least one second terminal device, wherein the first terminal device is a terminal device whose address changes after moving, and the at least one second terminal device is a terminal other than the first terminal device in the terminal device group Device; control the transceiver 1601 to notify the first terminal device and the at least one second terminal device to update the changed MAC address of the first terminal device.
  • the processor 1602 when determining that the at least one second terminal device belongs to the same terminal device group as the first terminal device, the processor 1602 is specifically configured to: control the The transceiver 1601 queries the member information of the terminal device group where the first terminal device is located from the group management function network element, and the member information includes the identities of all the terminal devices included in the terminal device group; according to the member The information determines the at least one second terminal device.
  • the processor 1602 controls the transceiver 1601 to notify the first terminal device to update the changed MAC address of the first terminal device, it is specifically configured to: control the The transceiver 1601 sends first address update information to the first terminal device through the first device, where the first address update information includes the changed MAC address of the first terminal device; wherein, the first device is The target access device after the first terminal device has moved; or, controlling the transceiver 1601 to send second address update information to the first terminal device through the second device, where the second address update information includes the first A changed MAC address of a terminal device; wherein, the second device is a target user plane function network element after the first terminal device moves, or the second device is a target user plane function network element after the first terminal device moves The target co-located device, wherein the target co-located device is a device co-located with an access device and a user plane function network element.
  • any second terminal device is a terminal device accessed through a 3GPP network
  • the processor 1602 is controlling the transceiver 1601 to notify the any second terminal device to update
  • the changed MAC address of the first terminal device is specifically used to: control the transceiver 1601 to send the third terminal device to any second terminal device through the access device currently accessed by any second terminal device.
  • Address update information where the third address update information includes the changed MAC address of the first terminal device.
  • any second terminal device is a terminal device accessed through a fixed network
  • the processor 1602 is controlling the transceiver 1601 to notify the any second terminal device to update
  • the changed MAC address of the first terminal device is specifically used to: control the transceiver 1601 to send fourth address update information to any of the second terminal devices through the network open function network element, and the fourth address update
  • the information includes the changed MAC address of the first terminal device.
  • the processor 1602 controls the transceiver 1601 to notify any second terminal device to update the changed MAC address of the first terminal device, it is specifically configured to: control the The transceiver 1601 sends fifth address update information to any one of the second terminal devices through the third device, where the fifth address update information includes the changed MAC address of the first terminal device; wherein, the third device Is the user plane function network element currently accessed by any of the second terminal devices, or, the third device is the co-located device currently accessed by any of the second terminal devices, and the co-located device is the interface Incoming equipment and user-plane functional network elements are co-located equipment.
  • the processor 1602 is further configured to initiate a release procedure of the original MAC address of the first terminal device, wherein the original MAC address of the first terminal device is the mobile device of the first terminal device.
  • the previous MAC address is further configured to initiate a release procedure of the original MAC address of the first terminal device, wherein the original MAC address of the first terminal device is the mobile device of the first terminal device. The previous MAC address.
  • the memory 1603 is used to store programs and the like.
  • the program may include program code, and the program code includes computer operation instructions.
  • the memory 1603 may include RAM, or may also include non-volatile memory, for example, at least one disk memory.
  • the processor 1602 executes the application program stored in the memory 1603 to implement the above-mentioned functions, thereby implementing the mobility management method shown in FIGS. 4-11.
  • the embodiments of the present application also provide a first terminal device, and the first terminal device is used to implement the mobility management method as shown in FIGS. 4-11.
  • the first terminal device 1700 includes: may include a transceiver 1701 and a processor 1702, and optionally may also include a memory 1703.
  • the processor 1702 may be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP, or the like.
  • the processor 1702 may further include a hardware chip.
  • the aforementioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • ASIC application-specific integrated circuit
  • PLD programmable logic device
  • the above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.
  • CPLD complex programmable logic device
  • FPGA field-programmable gate array
  • GAL generic array logic
  • the transceiver 1701 and the processor 1702 are connected to each other.
  • the transceiver 1701 and the processor 1702 are connected to each other through a bus 1704;
  • the bus 1704 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. .
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in FIG. 17, but it does not mean that there is only one bus or one type of bus.
  • the first terminal device 1700 executes the mobility management method of the embodiments shown in FIG. 4 to FIG. 11, it specifically includes:
  • the transceiver 1701 is used to communicate and interact with other devices, and to send and receive data.
  • the processor 1702 is configured to control the transceiver 1701 to obtain a notification to update the changed MAC address of the first terminal device from the control plane network element; and update the MAC address to the changed MAC address of the first terminal device MAC address.
  • the processor 1702 controls the transceiver 1701 to obtain a notification to update the changed MAC address of the first terminal device from the control plane network element, it is specifically configured to:
  • Control the transceiver 1701 to receive the first address update information sent by the control plane network element through the first device, where the first address update information includes the changed MAC address of the first terminal device; wherein, the first terminal device A device is a target access device after the first terminal device moves;
  • control the transceiver 1701 to receive second address update information sent by the control plane network element through a second device, where the second address update information includes the changed MAC address of the first terminal device;
  • the second device is the target user plane function network element after the first terminal device moves, or the second device is the target co-located device after the first terminal device moves, wherein the target co-located device
  • the device is a device that is combined with an access device and a user plane function network element.
  • the memory 1703 is used to store programs and the like.
  • the program may include program code, and the program code includes computer operation instructions.
  • the memory 1703 may include RAM, or may also include non-volatile memory, such as at least one disk memory.
  • the processor 1702 executes the application program stored in the memory 1703 to realize the above-mentioned functions, thereby realizing the mobility management method shown in FIGS. 4-11.
  • the embodiments of the present application also provide a second terminal device, and the second terminal device is used to implement the mobility management method as shown in FIGS. 4-11.
  • the second terminal device 1800 includes: may include a transceiver 1801 and a processor 1802, and optionally may also include a memory 1803.
  • the processor 1802 may be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP, or the like.
  • the processor 1802 may further include a hardware chip.
  • the aforementioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • ASIC application-specific integrated circuit
  • PLD programmable logic device
  • the above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.
  • CPLD complex programmable logic device
  • FPGA field-programmable gate array
  • GAL generic array logic
  • the transceiver 1801 and the processor 1802 are connected to each other.
  • the transceiver 1801 and the processor 1802 are connected to each other through a bus 1804;
  • the bus 1804 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. .
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in FIG. 18 to represent, but it does not mean that there is only one bus or one type of bus.
  • the second terminal device 1800 executes the mobility management method of the embodiments shown in FIG. 4 to FIG. 11, it specifically includes:
  • the transceiver 1801 is used to communicate and interact with other devices and send and receive data.
  • the processor 1802 is configured to control the transceiver 1801 to obtain a notification to update the changed MAC address of the first terminal device from the control plane network element; to update the cached MAC address of the first terminal device to all The changed MAC address of the first terminal device.
  • the processor 1802 when the second terminal device is a terminal device accessed through a 3GPP network, the processor 1802 is controlling the transceiver 1801 to obtain updated information from the control plane network element.
  • the notification of the changed MAC address of the first terminal device is specifically used to: control the transceiver 1801 to receive the third address update sent by the control plane network element through the access device currently accessed by the second terminal device Information, the third address update information includes the changed MAC address of the first terminal device.
  • the processor 1802 when the second terminal device is a terminal device accessed through a fixed network, the processor 1802 is controlling the transceiver 1801 to obtain update information from the control plane network element. In the notification of the changed MAC address of the first terminal device, it is specifically used to: control the transceiver 1801 to receive the fourth address update information sent by the session management function network element through the network opening function network element, and the fourth The address update information includes the changed MAC address of the first terminal device.
  • the processor 1802 controls the transceiver 1801 to obtain a notification from the control plane network element to update the changed MAC address of the first terminal device, it is specifically configured to:
  • the transceiver 1801 receives fifth address update information sent by the control plane network element through a third device, where the fifth address update information includes the changed MAC address of the first terminal device; wherein, the third device Is the user plane function network element currently accessed by the second terminal device, or the third device is the co-located device currently accessed by the second terminal device, and the co-located device is the access device and the user A device that is co-located with surface function network elements.
  • the memory 1803 is used to store programs and the like.
  • the program may include program code, and the program code includes computer operation instructions.
  • the memory 1803 may include RAM, or may also include non-volatile memory, such as at least one disk memory.
  • the processor 1802 executes the application program stored in the memory 1803 to realize the above-mentioned functions, thereby realizing the mobility management method as shown in FIGS. 4-11.
  • a mobility management method and device are provided. Only the control plane network element needs to determine the MAC address of the mobile terminal device and notify the corresponding terminal device to update, without changing the system.
  • the MAC address forwarding table can flexibly realize the switching of the forwarding path and ensure the continuity of the service during the movement of the terminal equipment.
  • this application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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Abstract

一种移动性管理方法及装置，用以灵活地实现转发路径的切换，保证终端设备移动过程中业务的连续性。该方法包括：控制面网元在第一终端设备移动后，确定所述第一终端设备改变后的媒体访问控制地址MAC地址；然后，所述控制面网元确定与所述第一终端设备归属于同一个终端设备群组的至少一个第二终端设备，其中所述第一终端设备为移动后地址发生改变的终端设备，所述至少一个第二终端设备为所述终端设备群组中除所述第一终端设备以外的终端设备；最后，所述控制面网元通知所述第一终端设备和所述至少一个第二终端设备更新所述第一终端设备改变后的MAC地址。

Description

一种移动性管理方法及装置
本申请要求在2019年01月30日提交中国专利局、申请号为201910090953.4、申请名称为“一种移动性管理方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种移动性管理方法及装置。
背景技术
在工业网络中，以太网是工业以太网协议的基础，支持以太网有助于3GPP进行工业控制网络。在以太网中，当终端设备之间进行业务通信的过程中，一个终端设备移动后会需要同时切换该终端设备的接入设备，以及切换外部交换网络的转发路径，以完整地更新端到端的转发路径。
目前，在终端设备移动时，需要更新全网媒体访问控制地址(media access control address，MAC)地址转发表实现转发路径的切换。但是在实际中每个终端设备移动都进行修改MAC地址转发表，这样会造成资源浪费，并且修改MAC地址转发表过程中修改失败或者修改不完全的可能性很大，不能保证业务的连续性。因此，上述方法并不能灵活地实现转发路径的切换。
因此，目前需要一种方法，可以灵活地实现转发路径的切换，保证终端设备移动过程中业务的连续性。
发明内容
本申请提供一种移动性管理方法及装置，用以灵活地实现转发路径的切换，保证终端设备移动过程中业务的连续性。
第一方面，本申请提供了一种移动性管理方法，该方法包括：控制面网元在第一终端设备移动后，确定所述第一终端设备改变后的媒体访问控制地址MAC地址；所述控制面网元确定与所述第一终端设备归属于同一个终端设备群组的至少一个第二终端设备，并通知所述第一终端设备和所述至少一个第二终端设备更新所述第一终端设备改变后的MAC地址，其中所述第一终端设备为移动后地址发生改变的终端设备，所述至少一个第二终端设备为所述终端设备群组中除所述第一终端设备以外的终端设备。
通过上述方法，只需所述控制面网元决定移动的终端设备的MAC地址，并通知相应的终端设备更新，可以无需改变系统中的MAC地址转发表，从而可以灵活地实现转发路径的切换，保证终端设备移动过程中业务的连续性。
在一个可能的设计中，所述控制面网元确定与所述第一终端设备归属于同一个终端设备群组的所述至少一个第二终端设备，具体方法可以包括：所述控制面网元从群组管理功能网元查询所述第一终端设备所在的终端设备群组的成员信息，所述成员信息包括所述终端设备群组包括的所有终端设备的标识；然后所述控制面网元根据所述成员信息确定所述至少一个第二终端设备。
通过上述方法，所述控制面网元可以准确地确定与所述第一终端设备归属于同一个终端设备群组的所述至少一个第二终端设备。
在一个可能的设计中，所述控制面网元通知所述第一终端设备更新所述第一终端设备改变后的MAC地址，具体方法可以为：
所述控制面网元通过第一设备向所述第一终端设备发送第一地址更新信息，所述第一地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第一设备为所述第一终端设备移动后的目标接入设备；
或者，所述控制面网元通过第二设备向所述第一终端设备发送第二地址更新信息，所述第二地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第二设备为所述第一终端设备移动后的目标用户面功能网元，或者，所述第二设备为所述第一终端设备移动后的目标合设设备，其中所述目标合设设备为接入设备和用户面功能网元合设的设备。
通过上述方法，所述控制面网元可以根据不同情况采用不同的方法灵活地实现通知所述第一终端设备更新所述第一终端设备改变后的MAC地址。
在一个可能的设计中，当任一个第二终端设备为通过3GPP网络接入的终端设备时，所述控制面网元通知所述任一个第二终端设备更新所述第一终端设备改变后的MAC地址，具体方法可以包括：所述控制面网元通过所述任一个第二终端设备当前接入的接入设备向所述任一个第二终端设备发送第三地址更新信息，所述第三地址更新信息包括所述第一终端设备改变后的MAC地址。
通过上述方法，所述控制面网元可以根据实际情况成功通知所述任一个第二终端设备更新所述第一终端设备改变后的MAC地址。
在一个可能的设计中，当任一个第二终端设备为通过固网接入的终端设备时，所述控制面网元通知所述任一个第二终端设备更新所述第一终端设备改变后的MAC地址，具体方法可以包括：所述控制面网元通过网络开放功能网元向所述任一个第二终端设备发送第四地址更新信息，所述第四地址更新信息包括所述第一终端设备改变后的MAC地址。
通过上述方法，所述控制面网元可以根据实际情况成功通知所述任一个第二终端设备更新所述第一终端设备改变后的MAC地址。
在一个可能的设计中，所述控制面网元通知任一个第二终端设备更新所述第一终端设备改变后的MAC地址，具体方法可以包括：所述控制面网元通过第三设备向所述任一个第二终端设备发送第五地址更新信息，所述第五地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第三设备为所述任一个第二终端设备当前接入的用户面功能网元，或者，所述第三设备为所述任一个第二终端设备当前接入的合设设备，所述合设设备为接入设备和用户面功能网元合设的设备。
通过上述方法，所述控制面网元可以准确地通知所述任一个第二终端设备更新所述第一终端设备改变后的MAC地址。
在一个可能的设计中，所述控制面网元发起第一终端设备的原MAC地址的释放流程，其中所述第一终端设备的原MAC地址为所述第一终端设备移动前的MAC地址。这样可以节省资源占用，避免资源浪费。
第二方面，本申请提供了一种移动性管理方法，应用于终端设备移动场景，该方法包括：第一终端设备从控制面网元获得更新所述第一终端设备改变后的MAC地址的通知后， 将MAC地址更新为所述第一终端设备改变后的MAC地址。
通过上述方法，只需更新移动的终端设备改变后的MAC地址，可以无需改变系统中的MAC地址转发表，从而可以灵活地实现转发路径的切换，保证终端设备移动过程中业务的连续性。
在一个可能的设计中，所述第一终端设备从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知，具体方法可以为：
所述第一终端设备接收所述控制面网元通过第一设备发送的第一地址更新信息，所述第一地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第一设备为所述第一终端设备移动后的目标接入设备；
或者，所述第一终端设备接收所述控制面网元通过第二设备发送的第二地址更新信息，所述第二地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第二设备为所述第一终端设备移动后的目标用户面功能网元，或者，所述第二设备为所述第一终端设备移动后的所述目标合设设备，其中所述目标合设设备为接入设备和用户面功能网元合设的设备。
通过上述方法，所述第一终端设备可以准确地获得更新所述第一终端设备改变后的MAC地址的通知，以使后续更新所述第一终端设备的MAC为改变后的MAC地址。
第三方面，本申请提供了一种移动性管理方法，应用于终端设备移动场景，该方法可以包括：第二终端设备从控制面网元获得更新所述第一终端设备改变后的MAC地址的通知后，将缓存的所述第一终端设备的地址更新为所述第一终端设备改变后的MAC地址。
通过上述方法，只需更新移动的终端设备改变后的MAC地址，可以无需改变系统中的MAC地址转发表，从而可以灵活地实现转发路径的切换，保证终端设备移动过程中业务的连续性。
在一个可能的设计中，当所述第二终端设备为通过3GPP网络接入的终端设备时，所述第二终端设备从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知，具体方法可以包括：所述第二终端设备接收所述控制面网元通过所述第二终端设备当前接入的接入设备发送的第三地址更新信息，所述第三地址更新信息包括所述第一终端设备改变后的MAC地址。
通过上述方法，所述第二终端设备可以准确地获得更新所述第一终端设备改变后的MAC地址的通知，以使后续更新所述第一终端设备的MAC为改变后的MAC地址。
在一个可能的设计中，当所述第二终端设备为通过固网接入的终端设备时，所述第二终端设备从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知，具体方法可以包括：所述第二终端设备接收所述会话管理功能网元通过网络开放功能网元发送的第四地址更新信息，所述第四地址更新信息包括所述第一终端设备改变后的MAC地址。
通过上述方法，所述第二终端设备可以准确地获得更新所述第一终端设备改变后的MAC地址的通知，以使后续更新所述第一终端设备的MAC为改变后的MAC地址。
在一个可能的设计中，所述第二终端设备从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知，具体方法可以包括：所述第二终端设备接收所述控制面网元通过第三设备发送的第五地址更新信息，所述第五地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第三设备为所述第二终端设备当前接入的用户面功能网元，或者，所述第三设备为所述第二终端设备当前接入的合设设备，所述合设设备为接入 设备和用户面功能网元合设的设备。
通过上述方法，所述第二终端设备可以准确地获得更新所述第一终端设备改变后的MAC地址的通知，以使后续更新所述第一终端设备的MAC为改变后的MAC地址。
第四方面，本申请还提供了一种控制面网元，该控制面网元具有实现上述第一方面方法实例中控制面网元的功能。功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中，所述控制面网元的结构中包括处理单元和收发单元，这些单元可以执行上述第一方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
在一个可能的设计中，所述控制面网元的结构中包括收发器和处理器，可选的还可以包括存储器，收发器用于收发数据，以及与通信系统中的其他设备进行通信交互，处理器被配置为支持控制面网元执行上述第一方面方法中相应的功能。存储器与处理器耦合，其保存控制面网元必要的程序指令和数据。
第五方面，本申请还提供了一种第一终端设备，该第一终端设备具有实现上述第二方面方法实例中第一终端设备的功能。功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中，所述第一终端设备的结构中包括收发单元和处理单元，这些单元可以执行上述第二方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
在一个可能的设计中，所述第一终端设备的结构中包括收发器和处理器，可选的还可以包括存储器，收发器用于收发数据，以及与通信系统中的其他设备进行通信交互，处理器被配置为支持第一终端设备执行上述第二方面方法中相应的功能。存储器与处理器耦合，其保存第一终端设备必要的程序指令和数据。
第六方面，本申请还提供了一种第二终端设备，该第二终端设备具有实现上述第三方面方法实例中第二终端设备的功能。功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中，所述第二终端设备的结构中包括收发单元和处理单元，这些单元可以执行上述第三方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
在一个可能的设计中，所述第二终端设备的结构中包括收发器和处理器，可选的还可以包括存储器，收发器用于收发数据，以及与通信系统中的其他设备进行通信交互，处理器被配置为支持第二终端设备执行上述第三方面方法中相应的功能。存储器与处理器耦合，其保存第二终端设备必要的程序指令和数据。
第七方面，本申请还提供了一种通信系统，通信系统可以包括上述设计中提及的控制面网元、第一终端设备、至少一个第二终端设备等。
第十七方面，本申请还提供了一种计算机存储介质，计算机存储介质中存储有计算机可执行指令，计算机可执行指令在被计算机调用时用于使计算机执行上述任一种方法。
第十八方面，本申请还提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述任一种方法。
第十九方面，本申请还提供了一种芯片，芯片与存储器耦合，用于读取并执行存储器 中存储的程序指令，以实现上述任一种方法。
附图说明
图1为本申请提供的一种通信系统的架构示意图；
图2为本申请提供的另一种通信系统的架构示意图；
图3为本申请提供的另一种通信系统的架构示意图；
图4为本申请提供的一种移动性管理方法的流程图；
图5为本申请提供的一种移动性管理方法的示例的流程图；
图6为本申请提供的另一种移动性管理方法的示例的流程图；
图7为本申请提供的另一种移动性管理方法的示例的流程图；
图8为本申请提供的另一种移动性管理方法的示例的流程图；
图9为本申请提供的另一种移动性管理方法的示例的流程图；
图10为本申请提供的另一种移动性管理方法的示例的流程图；
图11为本申请提供的另一种移动性管理方法的示例的流程图；
图12a为本申请提供的一种业务路径示意图；
图12b为本申请提供的另一种业务路径示意图；
图13为本申请提供的一种控制面网元的结构示意图；
图14为本申请提供的一种第一终端设备的结构示意图；
图15为本申请提供的一种第二终端设备的结构示意图；
图16为本申请提供的一种控制面网元的结构图；
图17为本申请提供的一种第一终端设备的结构图；
图18为本申请提供的一种第二终端设备的结构图。
具体实施方式
下面将结合附图对本申请作进一步地详细描述。
本申请实施例提供一种移动性管理方法及装置，用以灵活地实现转发路径的切换，保证终端设备移动过程中业务的连续性。其中，本申请所述方法和装置基于同一发明构思，由于方法及装置解决问题的原理相似，因此装置与方法的实施可以相互参见，重复之处不再赘述。
以下，对本申请中的部分用语进行解释说明，以便于本领域技术人员理解。
1)、控制面网元(control plane，CP)，为根据终端设备的移动进行移动性管理的设备。所述控制面网元可以但不限于为第三代合作伙伴计划(the 3rd generation partnership project，3GPP)控制面网元，例如，所述控制面网元可以为会话管理功能网元(session management function，SMF)、核心网接入和移动性管理功能网元(access and mobility management function，AMF)、统一数据管理网元(unified data management，UDM)等。
2)、至少一个，表示一个或者多个。
3)、在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
为了更加清晰地描述本申请实施例的技术方案，下面结合附图，对本申请实施例提供 的移动性管理方法及装置进行详细说明。
本申请实施例提供的移动性管理方法适用的一种可能的通信系统的架构，可以包括网络切片选择功能网元、网络开放功能网元、网络功能库功能网元、策略控制功能网元、数据管理网元、群组管理功能网元、应用功能网元、核心网接入和移动性管理功能网元、会话管理功能网元、鉴权服务器功能网元、路径管理功能网元、终端设备、接入网设备、用户面功能网元和数据网络。其中，图1示出了所述通信系统的架构的一种可能的示例，具体包括：NSSF网元、NEF网元、NRF网元、PCF网元、UDM网元、GMF网元、AF网元、AMF网元、SMF网元、AUSF网元，PMF网元，UE、接入网(access network，AN)设备、UPF网元和数据网络(data network，DN)。其中，AMF网元与终端设备之间可以通过N1接口相连，AMF与AN设备之间可以通过N2接口相连，AN设备与UPF之间可以通过N3接口相连，SMF与UPF之间可以通过N4接口相连，UPF与DN之间可以通过N6接口相连。接口名称只是一个示例说明，本申请实施例对此不作具体限定。应理解，本申请实施例并不限于图1所示通信系统，图1中所示的网元的名称在这里仅作为一种示例说明，并不作为对本申请的方法适用的通信系统的架构中包括的网元的限定。下面对所述通信系统中的各个网元或设备的功能进行详细描述：
所述终端设备，又可以称之为用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等，是一种向用户提供语音和/或数据连通性的设备。例如，所述终端设备可以包括具有无线连接功能的手持式设备、车载设备、计算设备、移动台(mobile station，MS)或连接到无线调制解调器的其他处理设备等，以及经接入网与一个或多个核心网进行通信的移动终端。目前，所述终端设备可以是：手机(mobile phone)、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self-driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端，或智慧家庭(smart home)中的无线终端，或自动导引运输车(automated guided vehicle，AGV)、AGV控制器等。其中，图1中所述终端设备以UE示出，仅作为示例，并不对终端设备进行限定。
无线接入网络可以为图1所示的接入网(access network，AN)，向所述终端设备提供无线接入服务。所述接入网设备是所述通信系统中将所述终端设备接入到无线网络的设备。所述接入网设备为无线接入网中的节点，又可以称为基站，还可以称为无线接入网(radio access network，RAN)节点(或设备)。目前，一些接入网设备的举例为：gNB、传输接收点(transmission reception point，TRP)、演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station,BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(base band unit，BBU)，或无线保真(wireless fidelity，Wifi)接入点(access point，AP)等。
所述数据网络，例如图1所示的数据网络(data network，DN)，可以是因特网(Internet)、IP多媒体业务(IP Multi-media Service，IMS)网络、区域网络(即本地网络，例如移动边缘计算(mobile edge computing，MEC)网络)等。所述数据网络中包括应用服务器，所述 应用服务器通过与所述终端设备进行数据传输，为所述终端设备提供业务服务。
核心网用于将所述终端设备接入可以实现所述终端设备的业务的DN。下面对所述核心网中各个网元的功能进行描述：
所述核心网接入和移动性管理功能网元，可用于对所述终端设备的接入控制和移动性进行管理，在实际应用中，其包括了长期演进(long term evolution，LTE)中网络框架中移动管理实体(mobility management entity，MME)里的移动性管理功能，并加入了接入管理功能，具体可以负责所述终端设备的注册、移动性管理、跟踪区更新流程、可达性检测、会话管理功能网元的选择、移动状态转换管理等。例如，在5G中，所述核心网接入和移动性管理功能网元可以是AMF(access and mobility management function)网元，例如图1所示，在未来通信，如6G中，所述核心网接入和移动性管理功能网元仍可以是AMF网元，或有其它的名称，本申请不做限定。当所述核心网接入和移动性管理功能网元是AMF网元时，所述AMF可以提供Namf服务。
所述会话管理功能网元，可用于负责所述终端设备的会话管理(包括会话的建立、修改和释放)，用户面功能网元的选择和重选、所述终端设备的互联网协议(internet protocol，IP)地址分配、服务质量(quality of service，QoS)控制等。例如，在5G中，所述会话管理功能网元可以是SMF(session management function)网元，例如图1所示，在未来通信，如6G中，所述会话管理功能网元仍可以是SMF网元，或有其它的名称，本申请不做限定。当会话管理功能网元时SMF网元时，所述SMF可以提供Nsmf服务。
所述策略控制功能网元，可用于负责策略控制决策、提供基于业务数据流和应用检测、门控、QoS和基于流的计费控制等功能等。例如，在5G中，所述策略控制功能网元可以是PCF(policy control function)网元，例如图1所示，在未来通信，如6G中，所述策略控制功能网元仍可以是PCF网元，或有其它的名称，本申请不做限定。当所述策略控制功能网元是PCF网元，所述PCF网元可以提供Npcf服务。
所述应用功能网元，主要功能是与第三代合作伙伴计划(the 3rd generation partnership project，3GPP)核心网交互来提供服务，来影响业务流路由、接入网能力开放、策略控制等。例如，在5G中，所述应用功能网元可以是AF(application function)网元，例如图1所示，在未来通信，如6G中，所述应用功能网元仍可以是AF网元，或有其它的名称，本申请不做限定。当所述应用功能网元是AF网元时，所述AF网元可以提供Naf服务。
所述数据管理网元，可用于管理所述终端设备的签约数据、与所述终端设备相关的注册信息等。例如，在5G中，所述数据管理网元可以是统一数据管理网元(unified data management，UDM)，例如图1所示，在未来通信，如6G中，所述数据管理网元仍可以是UDM网元，或有其它的名称，本申请不做限定。当所述数据管理网元是UDM网元时，所述UDM网元可以提供Nudm服务。
所述网络开放功能网元，可用于使3GPP能够安全地向第三方的AF(例如，业务能力服务器(Services Capability Server，SCS)、应用服务器(Application Server，AS)等)提供网络业务能力等。例如，在5G中，所述网络开放功能网元可以是NEF(network exposure function)网元，例如图1所示，在未来通信，如6G中，所述网络开放功能网元仍可以是NEF网元，或有其它的名称，本申请不做限定。当所述网络开放功能网元是NEF时，所述NEF可以向其他网络功能网元提供Nnef服务。
所述用户面功能网元，可用于转发终端设备的用户面数据。主要功能是数据包路由和 转发、移动性锚点、上行分类器来支持路由业务流到数据网络、分支点来支持多归属分组数据单元(Packet Data Unit，PDU)会话等。例如，在5G中，所述用户面功能网元可以是UPF(user plane function)网元，例如图1所示；在未来通信，如6G中，所述用户面功能网元仍可以是UPF网元，或有其它的名称，本申请不做限定。
所述鉴权服务器功能网元，可用于提供鉴权服务。例如，在5G中，所述鉴权服务器功能网元可以是(authentication server function，AUSF)网元，例如图1所示；在未来通信，如6G中，所述鉴权服务器功能网元仍可以是AUSF网元，或有其它的名称，本申请不做限定。当所述鉴权服务器功能网元是AUSF网元时，所述AUSF网元可以提供Nausf服务。
所述群组管理功能网元，可用于5GLAN群组管理，基于终端设备的请求动态创建、修改、删除一个群组。例如，在5G中所述群组管理功能网元可以是(group management function，GMF)，例如图1所示；在未来通信，如6G中，所述群组管理功能网元仍可以是GMF网元，或有其它的名称，本申请不做限定。
所述路径管理功能网元，具有管理用户面路径，以及实现群组间隔离功能。例如，在5G中所述路径管理功能网元可以是(path management function，PMF)，例如图1所示；在未来通信，如6G中，所述路径管理功能网元仍可以是PMF网元，或有其它的名称，本申请不做限定。
所述网络切片选择功能网元，可用于为终端的业务选择合适的网络切片。例如，在5G中所述网络切片选择功能网元可以是(network slice selection function，NSSF)，例如图1所示；在未来通信，如6G中，所述网络切片选择功能网元仍可以是NSSF网元，或有其它的名称，本申请不做限定。
所述网络功能库功能网元，例如，在5G中所述网络功能库功能网元可以是((network function，NF)repository function，NRF)，例如图1所示；在未来通信，如6G中，所述网络功能库功能网元仍可以是NRF网元，或有其它的名称，本申请不做限定。
核心网中的以上各个网元也可以称为功能实体，既可以是在专用硬件上实现的网络元件，也可以是在专用硬件上运行的软件实例，或者是在适当平台上虚拟化功能的实例，例如，上述虚拟化平台可以为云平台。
需要说明的是，图1所示的通信系统的架构中不限于仅包含图中所示的网元，还可以包含其它未在图中表示的设备，具体本申请在此处不再一一列举。
需要说明的是，本申请实施例并不限定核心网中各个网元的分布形式，图1所示的分布形式只是示例性的，本申请不作限定。
为方便说明，本申请后续均以图1所示的网元为例进行说明，并将XX网元直接简称为XX。应理解，本申请中所有网元的名称仅仅作为示例，在未来通信中还可以称为其它名称，或者在未来通信中本申请涉及的网元还可以通过其它具有相同功能的实体或者设备等来替代，本申请对此均不作限定。这里做统一说明，后续不再赘述。
需要说明的是，图1所示的通信系统并不构成本申请实施例能够适用的通信系统的限定。图1所示的通信系统架构为5G系统架构，可选的，本申请实施例的方法还适用于未来的各种通信系统，例如6G或者其他通信网络等。
基于以上实施例，申请实施例提供的移动性管理方法适用的可能的通信系统的架构还可如图2和图3所示。其中，UP(也即UPF)下沉到接入设备(RAN)附近，CP部署在 相对集中的位置，UP和UP之间，以及CP和UP之间通过交换网络相连。其中，图2和图3所示的架构中CP和UP的功能可以由协议3GPP TS 23.501定义，其中3GPP CP可以包括AMF、SMF、UDM等功能实体(功能网元)，功能是对UE进行鉴权认证，接入和移动性管理等。UP是3GPP的核心网用户面功能网元，主要功能用户面锚点，提供对外接入。交换网络由以太网交换组成，提供3GPP网元之间的可达性，以及固定设备的接入。在一种实现方式中，UP下沉到RAN附近，如图2所示；另一种实现方式中，RAN和UP可能合一，即合为一个设备，可以称为融合的接入设备(融合的RAN)(merged RAN，M-RAN)(在本申请中涉及的合设设备为融合的接入设备)，UP不单独呈现，如图3所示。
本申请实施例提供的一种移动性管理方法，适用于如图1以及图2或图3所示的通信系统。参阅图4所示，该方法的具体流程可以包括：
步骤401：控制面网元在第一终端设备移动后，确定所述第一终端设备改变后的MAC地址。
在具体实施时，在所述第一终端设备移动之后，所述控制面网元决定更新所述第一终端设备的MAC地址，并确定所述第一终端设备改变后的MAC地址，通知所述第一终端设备及与所述第一终端设备处于同一个终端设备群组的其他终端设备更新所述第一终端设备的改变后的MAC地址。
其中，所述控制面网元确定所述第一终端设备改变后的MAC地址具体为所述控制面网元为所述第一终端设备分配新的MAC地址(即所述第一终端设备改变后的MAC地址)。此时所述控制面网元可以为SMF。
步骤402：所述控制面网元确定与所述第一终端设备归属于同一个终端设备群组的至少一个第二终端设备，其中所述第一终端设备为移动后地址发生改变的终端设备，所述至少一个第二终端设备为所述终端设备群组中除所述第一终端设备以外的终端设备。
在一种可选的实施方式中，所述控制面网元确定与所述第一终端设备归属于同一个终端设备群组的所述至少一个第二终端设备，具体方法可以为：所述控制面网元从群组管理功能网元查询所述第一终端设备所在的终端设备群组的成员信息，所述成员信息包括所述终端设备群组包括的所有终端设备的标识；所述控制面网元根据所述成员信息确定所述至少一个第二终端设备。
其中，所述控制面网元从群组管理功能网元查询所述第一终端设备所在的终端设备群组的成员信息时，具体可以为：所述控制面网元向所述群组管理功能网元发送成员信息查询请求，所述成员信息查询请求中携带所述第一终端设备的标识；所述群组管理功能网元根据所述第一终端设备的标识确定所述第一终端设备所在的终端设备群组，然后向所述控制面网元返回所述成员信息。
在一种可选的实方式中，所述成员信息中还可以包括所述终端设备群组中每个终端设备对应的PDU会话标识。
需要说明的是，对于通过固网接入的终端设备，涉及的终端设备的地址可以为IP地址，或者MAC地址，或者IP地址和MAC地址。
步骤403：所述控制面网元通知所述第一终端设备和所述至少一个第二终端设备更新所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，所述控制面网元通知所述第一终端设备更新所述第一终端设备改变后的MAC地址，可以分为以下两种情况：
情况a1：所述控制面网元通过第一设备向所述第一终端设备发送第一地址更新信息，所述第一地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第一设备为所述第一终端设备移动后的目标接入设备。这种情况是通过控制面更新MAC地址的实现方法。
情况a2：所述控制面网元通过第二设备向所述第一终端设备发送第二地址更新信息，所述第二地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第二设备为所述第一终端设备移动后的目标用户面功能网元，或者，所述第二设备为所述第一终端设备移动后的目标合设设备，其中所述目标合设设备为接入设备和用户面功能网元合设的设备。这种情况是通过用户面更新地址的实现方法。其中，当所述终端设备所在的通信系统中有单独存在的用户面功能网元时(例如图2所示的通信系统)，所述第二设备为所述目标用户面功能网元；当所述终端设备所在的通信系统中没有单独存在的用户面功能网元，用户面功能网元与接入设备合为一个设备时(例如图3所示的通信系统)，所述第二设备为所述目标合设设备。
在上述情况a1中，所述控制面网元通过所述第一设备向所述第一终端设备发送所述第一地址更新信息时，可以先将所述第一地址更新信息发送给核心网接入和移动性管理功能网元，由所述核心网接入和移动性管理功能网元将所述第一地址更新信息转发给所述第一设备，再由所述第一设备向所述第一终端设备发起RRC连接重建立请求(携带所述第一地址更新信息)，请求所述第一终端设备更新MAC地址。所述第一终端设备更新自己的MAC地址缓存，记录所述第一终端设备改变后的MAC地址。在一种可选的实施方式中，所述第一地址更新信息中还可以包括所述第一终端的标识，所述第一终端设备的原MAC地址。
在上述情况a2中，所述控制面网元可以构造用户面报文，例如广播地址解析协议(Address Resolution Protocol，ARP)报文，或者单播ARP报文，或者其他私有MAC层消息。所述控制面网元通过上述报文或者消息携带所述第二地址更新信息。在一种示例中，当所述第二设备是所述目标用户面功能网元时，所述控制面网元可以通过N4请求消息发送上述构造的报文或者消息；然后所述目标用户面功能网元向所述第一终端设备发送所述控制面网元构造的报文或者消息；最后所述第一终端设备更新自己的MAC地址缓存，记录所述第一终端设备改变后的MAC地址。在另一种示例中，当所述第二设备是所述目标合设设备时，所述控制面网元可以先向所述核心网接入和移动性管理功能网元发送所述控制面网元构造的上述报文或者消息(例如可以通过N1消息或者N2消息发送)，由所述核心网接入和移动性管理功能网元转发给所述目标合设设备，所述目标合设设备再发送给所述第一终端设备，然后所述第一终端设备更新自己的MAC地址缓存，记录所述第一终端设备改变后的MAC地址。在一种可选的实施的方式中所述第二地址更新信息中还可以包括所述第一终端的标识，所述第一终端设备的原MAC地址。
在一种可选的实施方式中，所述控制面网元通知所述任一个第二终端设备更新所述第一终端设备改变后的MAC地址，可以分为以下三种情况：
情况b1：当任一个第二终端设备为通过3GPP网络接入的终端设备时，所述控制面网元通过所述任一个第二终端设备当前接入的接入设备向所述任一个第二终端设备发送第三地址更新信息，所述第三地址更新信息包括所述第一终端设备改变后的MAC地址。这种情况是通过控制面更新MAC地址的实现方法。
情况b2：当任一个第二终端设备为通过固网接入的终端设备时，所述控制面网元通过网络开放功能网元向所述任一个第二终端设备发送第四地址更新信息，所述第四地址更新信息包括所述第一终端设备改变后的MAC地址。这种情况是通过控制面更新MAC地址的实现方法。
情况b3：所述控制面网元通过第三设备向所述任一个第二终端设备发送第五地址更新信息，所述第五地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第三设备为所述任一个第二终端设备当前接入的用户面功能网元，或者，所述第三设备为所述任一个第二终端设备当前接入的合设设备，所述合设设备为接入设备和用户面功能网元合设的设备。这种情况是通过用户面更新地址的实现方法。其中，当所述终端设备所在的通信系统中有单独存在的用户面功能网元时(例如图2所示的通信系统)，所述第三设备为所述任一个第二终端设备当前接入的用户面功能网元；当所述终端设备所在的通信系统中没有单独存在的用户面功能网元，用户面功能网元与接入设备合为一个设备时(例如图3所示的通信系统)，所述第三设备为所述任一个第二终端设备当前接入的合设设备。
上述情况b1中，所述控制面网元通过所述任一个第二终端设备当前接入的接入设备向所述任一个第二终端设备发送第三地址更新信息的方法，与上述情况a1中所述控制面网元通过所述第一设备向所述第一终端设备发送所述第一地址更新信息的方法类似，具体可以参见上述过程，此处不再详细描述。同样的所述第三地址更新信息中还可以包括所述第一终端的标识，所述第一终端设备的原MAC地址。
上述情况b2中，所述控制面网元通过网络开放功能网元向所述任一个第二终端设备发送所述第四地址更新信息时，具体可以是所述控制面网元先将所述第四地址更新信息发送给所述网络开放功能网元，然后所述网络开放功能网元确定所述任一个第二终端设备对应的应用功能网元，所述应用功能网元将所述第四地址更新信息发送给所述任一个第二终端设备，然后所述应用功能网元和所述任一个第二终端设备将缓存的所述第一终端设备的地址更新为所述第一终端设备改变后的MAC地址。
在上述情况b3中，所述控制面网元通过网络开放功能网元向所述任一个第二终端设备发送所述第四地址更新信息的方法，与上述情况a2中所述控制面网元通过第二设备向所述第一终端设备发送第二地址更新信息的方法类似，具体可以参见上述过程，此处不再详细描述。需要说明的是，所述任一个第二终端设备可以为DN侧的终端设备。
在一种可选的实施方式中，所述控制面网元在通知了所述终端设备群组中的所有终端设备更新所述第一终端设备改变后的MAC地址之后，所述控制面网元还发起第一终端设备的原MAC地址的释放流程，其中所述第一终端设备的原MAC地址为所述第一终端设备移动前的MAC地址。这样可以释放系统资源，节省资源空间。
采用本申请实施例提供的移动性管理方法，控制面网元在第一终端设备移动后，确定所述第一终端设备改变后的MAC地址后，确定与所述第一终端设备归属于同一个终端设备群组的至少一个第二终端设备，其中所述第一终端设备为移动后地址发生改变的终端设备，所述至少一个第二终端设备为所述终端设备群组中除所述第一终端设备以外的终端设备；最后所述控制面网元通知所述第一终端设备和所述至少一个第二终端设备更新所述第一终端设备改变后的MAC地址。在该方法中，只需所述控制面网元决定移动的终端设备的MAC地址，并通知相应的终端设备更新，可以无需改变系统中的MAC地址转发表，从而可以灵活地实现转发路径的切换，保证终端设备移动过程中业务的连续性。
基于以上实施例，下面通过具体的示例对本申请提供的移动性管理方法进行示例性说明。在以下的示例中涉及的设备和网元均以具体的示例说明，例如，终端设备以UE为例，用户面功能网元以UPF为例，接入设备以RAN为例等等。
本申请实施例提供的一种移动性管理方法的示例，该示例应用于图1和图2所示的通信系统，主要描述在终端设备初始化时，终端设备MAC地址的分配过程。具体的，参见图5所示，该示例的流程可以为：
步骤501：UE发起以太网类型的PDU会话建立请求。
其中，所述UE执行步骤501时，具体可以为所述UE向AMF发送所述PDU会话建立请求，此时所述PDU会话建立请求中未携带MAC地址。
在一种实施方式中，所述PDU会话请求可以为所述UE向所述AMF发送的PDU session establisnment request。
步骤502：AMF收到所述PDU会话建立请求后，选择相应的SMF，并将所述PDU会话建立请求消息发送给选择的所述SMF。
步骤503：所述SMF向UDM请求用户的签约信息。
其中，步骤503的具体过程为所述SMF向所述UDM发送签约信息请求，然后所述UDM向所述SMF返回所述签约信息。
步骤504：所述SMF发起UE鉴权和认证流程。
步骤505：认证通过后，所述SMF发现UE需要建立以太网类型的PDU会话，SMF选择合适的UPF，并为所述UE(或会话)分配MAC地址。
步骤506：所述SMF向UPF发送N4会话建立请求。
具体的，在N4会话建立请求中，携带MAC地址，指导UPF在收到下行报文时，选择正确的N4会话转发以太帧。
步骤507：所述SMF向所述AMF返回PDU会话建立接受消息，PDU会话建立接受消息携带为UE分配的MAC地址。
步骤508：所述AMF向RAN发送PDU会话建立请求(NAS消息)，携带为UE分配的MAC地址。
其中，所述PDU会话建立请求可以为N2 PDU session request。
步骤509：所述RAN建立与所述UPF之间的会话连接，并向所述UE发起无线接入网络相关的资源预留请求，所述资源预留请求中可以包括PDU会话建立授受消息，并携带CP为UE分配的MAC地址。
其中，所述资源预留请求可以为所述RAN向所述UE发送的AN-specific resource set up request。
步骤510：所述UE预留AN资源，建立PDU会话，保存所述SMF分配的MAC地址。
步骤511：所述UE向所述RAN发送接入网相关的资源预留响应。
其中所述资源预留响应可以为AN-specific resource set up response。
步骤512：所述RAN和CP完成后续会话建立流程。
基于以上实施例，本申请实施例提供了一种移动性管理方法的示例，该示例应用于图1和图3所示的通信系统，主要描述在终端设备初始化时，终端设备MAC地址的分配过程。具体的，参见图6所示，该示例的流程可以为：
步骤601：M-RAN(融合了UPF部分功能的基站)向AMF注册自己的能力。
其中，所述步骤601的目的是通知所述AMF不需要选择UPF，不需要执行UPF相关的会话建立操作。
步骤602：UE发起以太网类型的PDU会话建立请求。
具体的，所述UE通过所述M-RAN向AMF发送所述PDU会话建立请求。即所述UE先向所述M-RAN发送所述PDU会话建立请求，然后，所述M-RAN向所述AMF发送所述PDU会话建立请求。
步骤603：AMF收到所述PDU会话建立请求后，发现所述PDU会话建立请求来自于所述M-RAN，确定所述UE当前接入了所述M-RAN。
步骤604：所述AMF选择SMF，并将所述PDU会话建立请求发送给被选择的所述SMF。
其中，所述PDU会话建立请求中可以携带指示信息，指示RAN融合了UPF功能，仅需要SMF执行QoS、认证和地址分配等功能。
步骤605：所述SMF发起UE鉴权和认证流程。
步骤606：所述SMF向UDM和PCF获取UE和QoS策略。
步骤607：认证通过后，所述SMF发现UE需要建立以太网类型的PDU会话，并为所述UE(或者会话)分配MAC地址。
步骤608：所述SMF向M-RAN和UE发起PDU会话建立请求，具体的，所述SMF将所述PDU会话建立请求发送给AMF，所述PDU会话建立请求中携带分配给UE的MAC地址。
其中，所述SMF可以通过所述SMF向所述AMF发送的N1/N2message transfer发送所述PDU会话建立请求。
步骤609：所述AMF接收到所述SMF的消息后，通过N2接口向所述M-RAN发送所述PDU会话建立请求，所述PDU会话建立请求中可携带下行流分类规则和QoS Profile，以及携带分配给UE的MAC地址。
步骤610：所述M-RAN收到UE的MAC地址后，建立UEMAC地址和UE ID(如RNTI)的对应关系，并创建SDAP实例，创建QFI和SRB，以及建立QFI与DRB的映射关系。在RAN用户面保存QoS Flow Template，对下行数据进行流分类，标记QFI。
当下行数据到来，所述M-RAN首先根据目的地址找到对应的UE ID和SDAP，然后通过流分类，标记QFI，交给SDAP处理。
步骤611：所述M-RAN向所述UE发送RRC连接重配置请求，所述RRC连接重配置请求中携带所述SMF发往所述UE的所述PDU会话建立请求，其中所述PDU会话建立请求包括为UE分配的MAC地址。
步骤612：所述UE建立PDU会话，并保存SMF分配的MAC地址，完成后续会话建立流程。
需要说明的是，上述图4所示的实施例中步骤401中涉及的所述控制面网元决定更新所述第一终端设备的MAC地址并为所述第一终端设备分配新的MAC地址的方法可以参见上述图5或者图6所示的示例中为UE分配MAC地址的方法。
本申请实施例提供的一种移动性管理方法的示例，该示例应用于图1，以及图2或图3所示的通信系统，主要描述在终端设备移动，MAC地址改变后，控制面网元通知移动的终端设备和通信对端的终端设备以及终端设备群组中的其他终端设备更新移动的终端设 备改变后的MAC地址，触发MAC地址更新。其中，在该示例中，以UE1为移动的UE，UE2为与所述UE1进行通信的对端终端设备为例进行说明，示例性的，所述UE1可以为AGV，所述UE2可以为AGV控制器。具体的，参见图7所示，该示例的流程可以为：
步骤701：UE1发生了移动，CP(SMF)为其分配新的MAC地址。
步骤702：所述SMF向GMF发送查询群组成员信息请求，所述查询群组成员信息请求用于请求所述UE1所在群组(LAN)的其它成员信息，所述查询群组成员信息请求携带UE1ID。
步骤703：GMF查询到所述UE1所属的群组(LAN)，向所述SMF返回查询群组成员信息响应，其中所述查询群组成员信息响应中包括群组(LAN)成员列表(UE ID list)，还可以包括所述群组中的每个UE对应的PDU会话ID。需要说明的是，通过固网连接的终端设备，UE ID可能是IP地址或MAC地址，或IP地址和MAC地址，本申请对比不作限定。
后续为群组成员的MAC地址缓存更新方法，具体可以分为两种方法：方法一，通过控制面更新MAC地址，具体的，所述SMF通过新的信令消息，向RAN和UE发起MAC地址缓存更新，这个方法需要扩展新的NAS和AS消息，方法流程具体可以参见以下步骤704-步骤713；方法二，通过用户面更新MAC地址，具体的，所述SMF可以通过用户面广播消息更新MAC地址缓存，比如发起ARP广播(针对有IP地址的UE)，或在MAC层扩展新消息，方法流程具体可以参见以下步骤714-步骤731。需要说明的是，根据实际情况上述方法一和方法二可以同时使用，本申请对此不做限定。
在一种示例中，当UE1和其他UE通过3GPP接入时，SMF获取群组成员信息后，可以查询SM上下文，找到相应UE当前接入的RAN。所述SMF向RAN发送MAC地址缓存更新消息，消息携带新MAC地址和原MAC地址。该消息可能是RAN粒度的(通N2接入发送给RAN，告诉RAN哪些UE的MAC地址缓存需要更新)，或是UE粒度的(通过N1接口，直接发送给UE，此时RAN对该消息透明)。具体的，步骤可以为步骤704-710。
步骤704：所述SMF向AMF发送MAC地址缓存更新消息，所述MAC地址缓存更新消息携带UE1的新MAC地址和原MAC地址。
步骤705：所述AMF向RAN 1发送MAC地址缓存更新消息。
其中，所述RAN1为所述UE 1移动后的目标RAN。在步骤705中MAC地址缓存更新消息对应图4所示的实施例中的第一地址更新信息。
步骤706：所述AMF向其他RAN分别发送MAC地址缓存更新消息。
其中，所述其他RAN为所述其他UE当前接入的RAN，具体的，当所述其他UE为多个时，所述其他RAN为一个或者多个，可选的，所述其他RAN中的一个RAN可以与RAN1相同，为方便在本实施例中用其他RAN示出。
步骤707：所述RAN 1向所述UE1发送RRC连接重建立请求，用于请求所述UE 1更新MAC地址缓存，所述RRC连接重建立请求中携带了UE 1的ID、UE 1的新MAC地址和原MAC地址。
步骤708：所述UE 1更新自己的MAC地址缓存，记录新MAC地址。
步骤709：所述其他RAN向所述其他UE发送RRC连接重建立请求，用于请求所述其他UE更新MAC地址缓存，所述RRC连接重建立请求中携带了UE 1的ID、UE 1的新MAC地址和原MAC地址。
步骤710：所述其他UE更新自己的MAC地址缓存，记录所述UE 1的新MAC地址。
在另一种示例中，当UE2通过固网接入时，SMF找到UE 2对应的NEF，并向NEF发送MAC地址缓存更新消息，MAC地址缓存更新消息携带UE 1的新MAC地址和原MAC地址。具体步骤可以为步骤711-步骤713。
步骤711：所述SMF向NEF发送MAC地址缓存更新消息，MAC地址缓存更新消息携带UE 1的新MAC地址和原MAC地址。
步骤712：所述NEF确定UE2对应的AF，并将MAC地址缓存更新消息转发给所述AF。
步骤713：所述AF和所述UE 2完成MAC地址缓存更新。
在方法二中，所述SMF构造用户面报文(即地址MAC地址更新缓存消息)，如广播报文ARP，或单播ARP响应消息，或其它私有MAC层消息，消息中携带UE 1的ID(如IP地址，或设备名称)，及其对应的新MAC地址。具体根据有无URF的情况可以分为以下示例：
在一种示例中，网络中有UPF的情况，可以参见步骤714-步骤722：
步骤714：所述SMF向UPF1发送MAC地址更新消息，携带构造的用户面消息。
其中，所述UPF 1为所述UE 1移动后的目标UPF。所述MAC地址更新消息可以是N4请求消息。
步骤715：所述SMF向其他UPF发送MAC地址更新消息。
其中，所述其他UPF为所述其他UE当前接入的UPF，具体的，当所述其他UE为多个时，所述其他UPF为一个或者多个，可选的，所述其他UPF中的一个UPF可以与UPF 1相同，为方便在本实施例中用其他UPF示出。
步骤716：所述SMF向UPF 2发送MAC地址更新消息。
其中，所述UPF2为所述UE 2当前接入的UPF。
步骤717：所述UPF 1向所述UE 1发送MAC地址更新消息。
步骤718：所述UE 1更新自己的MAC地址缓存，记录新MAC地址。
步骤719：所述其他UPF向所述其他UE发送MAC地址更新消息。
步骤720：所述其他UE更新自己的MAC地址缓存，记录所述UE 1的新MAC地址。
步骤721：所述UPF 2向所述UE 2发送MAC地址更新消息。
步骤722：所述UE 2更新自己的MAC地址缓存，记录所述UE 1的新MAC地址。
在另一种示例中，网络中没有UPF，RAN和UPF合为一个设备M-RAN的情况，可以参见步骤723-步骤731：
步骤723：所述SMF通过所述AMF向M-RAN 1发送请求消息，用于请求MAC地址更新，携带构造的用户面消息。所述请求消息可以是N1接口消息，或N2接口消息。
其中，所述M-RAN 1为所述UE 1当前接入的M-RAN。
步骤724：所述SMF通过所述AMF向其他M-RAN发送请求消息。
其中，所述其他M-RAN为所述其他UE当前接入的M-RAN，具体的，当所述其他UE为多个时，所述其他M-RAN为一个或者多个，可选的，所述其他M-RAN中的一个M-RAN可以与M-RAN 1相同，为方便在本实施例中用其他M-RAN示出。
步骤725：所述SMF通过所述AMF向M-RAN 2发送请求消息。
其中，所述M-RAN 2为所述UE 2当前接入的M-RAN。
步骤726：所述M-RAN 1向所述UE 1发送MAC地址更新消息。
步骤727：所述UE 1更新自己的MAC地址缓存，记录新MAC地址。
步骤728：所述其他M-RAN向所述其他UE发送MAC地址更新消息。
步骤729：所述其他UE更新自己的MAC地址缓存，记录所述UE 1的新MAC地址。
步骤730：所述M-RAN 2向所述UE 2发送MAC地址更新消息。
步骤731：所述UE 2更新自己的MAC地址缓存，记录所述UE 1的新MAC地址。
需要说明的是，方法二中的两个示例中，UE 2可以看做是DN侧的设备。
需要说明的是，示例中的上述步骤并不限于上述顺序，本申请对步骤执行的顺序不作限定。
基于以上实施例，本申请实施例提供了一种移动性管理方法的示例，该示例可以应用于图1和图2所示的通信系统。在该示例中描述了移动切换(UPF改变)过程中MAC地址重分配的一种可能的方法，针对需要建立新会话的情况(类似于3GPP Release 15的业务连续性模式3(SSC Mode3))。该示例的具体场景是，UE的MAC地址由SMF重分配，UE 1(例如AGV)和UE 2(例如，AGV控制器)均通过3GPP网络接入。具体的，参见图8所示，该示例的流程可以为：
步骤801：UE1发起以太网类型的PDU会话，采用图5所示的示例中所述的方法，UE1从SMF得到为其分配的MAC地址，UE1与UE 2建立通信。
步骤802：所述UE1移动到新的位置，上报测量结果。
步骤803：S RAN判断达到切换门限，向AMF发起切换请求。
其中，所述切换请求可以为所述S RAN向所述AMF发送的hand over request。
步骤804：所述AMF向SMF发起PDU会话更新请求，所述PDU会话更新请求中携带所述UE 1的位置信息。
步骤805：所述SMF判断需要更换UPF。
步骤806：所述SMF向UE1发送PDU会话重定向请求，请求UE 1发起新的PDU会话，并在所述PDU会话重定向请求中拒绝S RAN发起的切换请求。
具体的，所述SMF执行步骤806时，所述SMF向所述AMF发送所述PDU会话重定向请求，所述AMF向所述S RAN转发所述PDU会话重定向请求，之后所述S RAN向所述UE 1转发所述PDU会话重定向请求。
步骤807：所述UE 1发起新的以太网类型的PDU会话，采用图5所示的示例中所述的方法，UE 1从SMF得到为其分配的新MAC地址。
步骤808：所述SMF发起MAC地址缓存更新流程，实施方法可以参考图7所示的示例中的过程。
具体的，在该示例中，所述步骤808中可以执行，也可以不执行图7所示的实施例中涉及的通知所述UE 1更新MAC地址的步骤，本申请对此不作限定。
步骤809：所述SMF在收到所有的RAN发送的MAC地址更新成果消息后，发起PDU会话释放流程，释放UE 1的原MAC地址。
基于以上实施例，本申请实施例提供了一种移动性管理方法的示例，该示例可以应用于图1和图2所示的通信系统。在该示例中描述了移动切换(UPF改变)过程中MAC地址重分配的另一种可能的方法，具体的，参见图9所示，该示例的流程可以为：
步骤901：UE1发起以太网类型的PDU会话，采用图5所示的示例中所述的方法， UE从SMF得到为其分配的MAC地址。UE1与UE 2建立通信。
步骤902：UE1移动到新的位置，上报测量结果。
步骤903：S RAN判断达到切换门限，向AMF发起切换请求。
步骤904：所述AMF向SMF发起PDU会话更新请求，所述PDU会话更新请求中携带UE 1的位置信息。
步骤905：所述SMF判断需要更换UPF。
步骤906：所述SMF基于新的UPF(T UPF)，分配UE 1的新MAC地址。
步骤907：所述SMF向T UPF发起PDU会话建立请求，建立从S UPF到T UPF的转发隧道，并建立T UPF到T RAN的隧道。PDU会话建立请求携带新分配的MAC地址。所述T UPF收到所述PDU会话建立请求后建立MAC地址(去往T RAN的)下行隧道的映射关系。
步骤908：所述SMF向S UPF发起PDU会话建立请求，建立到新UPF的转发隧道，并设置间接转发规则，将去往UE 1的下行业务，转发到T UPF。
步骤909：所述SMF向所述AMF发送PDU会话更新响应消息。
步骤910：所述AMF向T RAN发送切换请求消息，所述切换请求消息中携带T UPF的隧道信息。
步骤911：所述T RAN判断接受切换请求，建立到T UPF的双向隧道，并向所述AMF返回切换请求确认消息，所述切换请求确认消息携带T RAN的隧道信息。
步骤912：所述AMF再次向所述SMF发送PDU会话更新请求，所述PDU会话更新请求携带T RAN的隧道信息。
步骤913：所述SMF向T UPF发送PDU会话修改请求，PDU会话修改请求携带T RAN的隧道信息。所述SMF建立到T RAN的双向转发隧道。
步骤914：所述SMF向所述AMF发送PDU会话更新响应消息，用于通知AMF T UPF侧已经准备就绪。
步骤915：所述AMF通过S RAN向UE 1发送切换命令，切换命令携带为UE 1分配的新MAC地址。
步骤916：UE 1收到切换命令后，断开与S RAN的RRC连接，建立与T RAN的RRC连接，并将MAC地址更换为新MAC地址。所述UE 1同时仍然接收发往原MAC地址的报文。
步骤917：所述UE 1向T RAN发送切换确认消息。
步骤918：T RAN向所述AMF发送切换通知消息。
步骤919：所述AMF向所述SMF发送PDU会话更新请求。
步骤920：SMF发起UE 1的新MAC地址缓存更新流程。具体可以参考图7所示的示例中的过程。
步骤921：所述SMF向T UPF发送PDU会话修改请求，PDU会话修改请求携带原MAC地址。T UPF收到PDU会话修改请求后，删除与S UPF的连接，并将与原MAC地址相关的转发规则删除。
步骤922：所述SMF向S UPF发送PDU会话删除请求，删除UE 1相关的会话资源。
基于以上实施例，本申请实施例提供了一种移动性管理方法的示例，该示例可以应用于图1和图3所示的通信系统。在该示例中描述了移动切换过程中MAC地址更新流程， 具体的，参见图10所示，该示例的流程可以为：
步骤1001：UE 1从S M-RAN切换到T M-RAN。
步骤1002：所述T M-RAN向所述AMF发送路径切换请求消息。
步骤1003：所述AMF判断RAN融合了UPF(即为M-RAN)，则在向SMF转发路径切换请求消息，并在转发的路径切换请求消息中携带融合的RAN(无UPF)指示信息。
步骤1004：所述SMF基于当前网络架构，判断UE 1更换了地址段(即MAC地址改变)，则基于当前位置重新为UE 1分配新MAC地址。
步骤1005：所述SMF通过所述AMF向T M-RAN发送MAC地址重分配请求，MAC地址重分配请求携带UE 1ID和新MAC地址。
步骤1006：T M-RAN向UE 1发送RRC连接重配置消息，保存新MAC地址。
步骤1007：UE 1保存新MAC地址，在后续的上行报文中使用新MAC地址，但下行同时接收原来和新的两个MAC地址的报文。
步骤1008：所述SMF发起UE 1MAC地址缓存更新流程。实施方法可以参考图7所示的示例中的过程，此处不再赘述。
步骤1009：所述SMF向所述AMF返回路径切换完成消息。
步骤1010：所述AMF向T M-RAN发送路径切换完成消息。
步骤1011：所述T M-RAN向S M-RAN发送UE 1上下文释放消息，指示切换完成。
步骤1012：所述S M-RAN完成数据报文转发后，向T M-RAN发送结束标记(End Marker)指示。
步骤1013：所述T M-RAN向UE 1发送RRC连接重配置消息，删除UE 1的原MAC地址。
基于图10所示的示例，进一步地，为了加快MAC地址分配进程，还可以在切换准备阶段向AMF通告切换事件，例如图11所示的步骤3-步骤7；在新RRC建立完成后立即发起路径切换(Path Switch)，例如图11所示的步骤12-步骤13。参阅图11所示，具体的流程可以为：
步骤1101：UE 1持续测量主服小区和邻区信号强度和信息质量。
步骤1102：S M-RAN检测到邻区质量好于当前小区，向邻区(T M-RAN)发送切换请求。
步骤1103：邻区(T M-RAN)决定接受切换请求，向AMF发送UE切换事件，UE切换事件中携带UE 1ID、S M-RAN ID和T M-RAN ID。
步骤1104：所述AMF向所述SMF发送切换事件，切换事件中携带UE 1ID、S M-RAN ID和T M-RAN ID。
步骤1105：所述SMF基于当前网络架构，判断UE更换了地址段(即MAC地址改变)，于是基于当前位置重新为UE 1分配新MAC地址。
步骤1106：所述SMF向所述AMF发送MAC地址重分配指示，MAC地址重分配指示携带UE 1的新MAC地址。
步骤1107：所述AMF向T M-RAN发送切换事件确认消息，在该切换事件确认消息中携带MAC地址重分配指示，以及UE 1ID、S M-RAN ID、源MAC地址和新MAC地址。
步骤1108：T M-RAN向S M-RAN发送切换确认消息，切换确认消息携带CP为UE 1分配新MAC地址。
步骤1109：S M-RAN向UE 1发送切换命令，切换命令携带CP为UE 1分配的新MAC地址。
步骤1110：S M-RAN向T M-RAN转发数据和SN号。
步骤1111：UE 1断开与S M-RAN的连接，向T M-RAN发起随机接入流程。UE1保存新MAC地址，后续在上行报文中使用新地址，但下行同时接收原来和新的两个MAC地址的报文。
步骤1112：T M-RAN向SMF发送路径切换请求。
步骤1113：所述SMF感知空口切换完成，于是发起UE 1MAC地址缓存更新流程。实施方法可以参考图7所示的示例中的过程，此处不再重复赘述。
步骤1114：路径切换完成，S M-RAN释放UE1上下文，清空缓存数据。详细步骤参考图10所示的示例中的步骤1009-步骤1012。
步骤1115：T M-RAN向UE 1发送RRC重配置请求，删除UE 1的原MAC地址，UE 1不再接收发往原MAC地址的报文。
基于以上实施例，以具体的示例说明采用本申请实施例提供的移动性管理方法的路径切换过程。例如，在UP和RAN合设成M-RAN的场景下，在切换前，UE(AGV)使用源基站的地址44-45-53-54-00-11，AGV控制器的缓存(如ARP缓存)中，记录UE(AGV)当前的MAC地址为44-45-53-54-00-11。AGV控制器使用这个地址作为发往AGV的以太网帧的目的MAC地址。示例性的，切换前的业务路径可以如图12a所示。在切换完成后，UE使用目标基站分配的地址44-45-53-54-01-11，3GPP网络通过NAS信令消息通知AGV控制器的更新地址缓存，将缓存中的AGV的MAC地址更新为44-45-53-54-01-11。后续发往该AGV的消息，将使用这个地址作为目的MAC地址。示例性的，切换前的业务路径可以如图12b所示。通过该示例可以得知，在终端设备移动后，只需更改终端设备的MAC地址，而不需要更新交换网络中的MAC转发表，从而可以灵活实现路径切换，保证业务连续性。
基于以上实施例，本申请实施例还提供了一种控制面网元，该控制面网元用于实现如图4-图11所示的移动性管理方法。参阅图13所示，该控制面网元1300可以包括：处理单元1301和收发单元1302，其中：
所述处理单元1301用于在第一终端设备移动后，确定所述第一终端设备改变后的媒体访问控制地址MAC地址；以及确定与所述第一终端设备归属于同一个终端设备群组的至少一个第二终端设备，其中所述第一终端设备为移动后地址发生改变的终端设备，所述至少一个第二终端设备为所述终端设备群组中除所述第一终端设备以外的终端设备；
所述收发单元1302用于通知所述第一终端设备和所述至少一个第二终端设备更新所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，所述处理单元1301在确定与所述第一终端设备归属于同一个终端设备群组的所述至少一个第二终端设备时具体用于：从群组管理功能网元查询所述第一终端设备所在的终端设备群组的成员信息，所述成员信息包括所述终端设备群组包括的所有终端设备的标识；根据所述成员信息确定所述至少一个第二终端设备。
在一种可选的实施方式中，所述收发单元1302在通知所述第一终端设备更新所述第一终端设备改变后的MAC地址时具体用于：通过第一设备向所述第一终端设备发送第一地址更新信息，所述第一地址更新信息包括所述第一终端设备改变后的MAC地址；其中， 所述第一设备为所述第一终端设备移动后的目标接入设备；或者，通过第二设备向所述第一终端设备发送第二地址更新信息，所述第二地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第二设备为所述第一终端设备移动后的目标用户面功能网元，或者，所述第二设备为所述第一终端设备移动后的目标合设设备，其中所述目标合设设备为接入设备和用户面功能网元合设的设备。
在一种可选的实施方式中，当任一个第二终端设备为通过3GPP网络接入的终端设备时，所述收发单元1302在通知所述任一个第二终端设备更新所述第一终端设备改变后的MAC地址时，具体用于：通过所述任一个第二终端设备当前接入的接入设备向所述任一个第二终端设备发送第三地址更新信息，所述第三地址更新信息包括所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，当任一个第二终端设备为通过固网接入的终端设备时，所述收发单元1302在通知所述任一个第二终端设备更新所述第一终端设备改变后的MAC地址时，具体用于：通过网络开放功能网元向所述任一个第二终端设备发送第四地址更新信息，所述第四地址更新信息包括所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，所述收发单元1302在通知任一个第二终端设备更新所述第一终端设备改变后的MAC地址时，具体用于：通过第三设备向所述任一个第二终端设备发送第五地址更新信息，所述第五地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第三设备为所述任一个第二终端设备当前接入的用户面功能网元，或者，所述第三设备为所述任一个第二终端设备当前接入的合设设备，所述合设设备为接入设备和用户面功能网元合设的设备。
在一种可选的实施方式中，所述处理单元1301还用于：发起第一终端设备的原MAC地址的释放流程，其中所述第一终端设备的原MAC地址为所述第一终端设备移动前的MAC地址。
基于以上实施例，本申请实施例还提供了一种第一终端设备，该第一终端设备用于实现如图4-图11所示的移动性管理方法。参阅图14所示，该第一终端设备1400可以包括：收发单元1401和处理单元1402，其中：
所述收发单元1401用于从控制面网元获得更新所述第一终端设备改变后的MAC地址的通知；所述处理单元1402用于将MAC地址更新为所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，所述收发单元1401在从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知时具体用于：接收所述控制面网元通过第一设备发送的第一地址更新信息，所述第一地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第一设备为所述第一终端设备移动后的目标接入设备；或者，接收所述控制面网元通过第二设备发送的第二地址更新信息，所述第二地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第二设备为所述第一终端设备移动后的目标用户面功能网元，或者，所述第二设备为所述第一终端设备移动后的所述目标合设设备，其中所述目标合设设备为接入设备和用户面功能网元合设的设备。
基于以上实施例，本申请实施例还提供了一种第二终端设备，该第二终端设备用于实现如图4-图11所示的移动性管理方法。参阅图15所示，该第二终端设备1500可以包括：收发单元1501和处理单元1502，其中：
所述收发单元1501用于从控制面网元获得更新所述第一终端设备改变后的MAC地址的通知；所述处理单元1502用于将缓存的所述第一终端设备的地址更新为所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，当所述第二终端设备为通过3GPP网络接入的终端设备时，所述收发单元1501在从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知时，具体用于：接收所述控制面网元通过所述第二终端设备当前接入的接入设备发送的第三地址更新信息，所述第三地址更新信息包括所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，当所述第二终端设备为通过固网接入的终端设备时，所述收发单元1501在从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知时，具体用于：接收所述会话管理功能网元通过网络开放功能网元发送的第四地址更新信息，所述第四地址更新信息包括所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，所述收发单元1501在从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知时，具体用于：接收所述控制面网元通过第三设备发送的第五地址更新信息，所述第五地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第三设备为所述第二终端设备当前接入的用户面功能网元，或者，所述第三设备为所述第二终端设备当前接入的合设设备，所述合设设备为接入设备和用户面功能网元合设的设备。
需要说明的是，本申请实施例中对单元的划分是示意性的，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。在本申请的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，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
基于以上实施例，本申请实施例还提供了一种控制面网元，所述控制面网元用于实现如图4-图11所示的移动性管理方法。参阅图16所示，所述控制面网元1600包括：可以包括收发器1601和处理器1602，可选的还可以包括存储器1603。
其中，所述处理器1602可以是中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)或者CPU和NP的组合等等。所述处理器1602还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device，CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(generic array logic，GAL)或其任意组合。所述处理器1602在实现上述功能时，可以通过硬件实现，当然也可以通过硬件执行相应的软件实现。
所述收发器1601和所述处理器1602之间相互连接。可选的，收发器1601和处理器1602通过总线1604相互连接；总线1604可以是外设部件互连标准(Peripheral Component Interconnect，PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture，EISA)总线等。总线可以分为地址总线、数据总线、控制总线等。为便于表示，图16中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
所述控制面网元1600在执行图4-图11所示的实施例的移动性管理方法时，具体包括：
所述收发器1601用于与其他设备进行通信交互，收发数据。
所述处理器1602，用于在第一终端设备移动后，确定所述第一终端设备改变后的媒体访问控制地址MAC地址；确定与所述第一终端设备归属于同一个终端设备群组的至少一个第二终端设备，其中所述第一终端设备为移动后地址发生改变的终端设备，所述至少一个第二终端设备为所述终端设备群组中除所述第一终端设备以外的终端设备；控制所述收发器1601通知所述第一终端设备和所述至少一个第二终端设备更新所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，所述处理器1602在确定与所述第一终端设备归属于同一个终端设备群组的所述至少一个第二终端设备时，具体用于：控制所述收发器1601从群组管理功能网元查询所述第一终端设备所在的终端设备群组的成员信息，所述成员信息包括所述终端设备群组包括的所有终端设备的标识；根据所述成员信息确定所述至少一个第二终端设备。
在一种可选的实施方式中，所述处理器1602在控制所述收发器1601通知所述第一终端设备更新所述第一终端设备改变后的MAC地址时，具体用于：控制所述收发器1601通过第一设备向所述第一终端设备发送第一地址更新信息，所述第一地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第一设备为所述第一终端设备移动后的目标接入设备；或者，控制所述收发器1601通过第二设备向所述第一终端设备发送第二地址更新信息，所述第二地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第二设备为所述第一终端设备移动后的目标用户面功能网元，或者，所述第二设备为所述第一终端设备移动后的目标合设设备，其中所述目标合设设备为接入设备和用户面功能网元合设的设备。
在一种可选的实施方式中，当任一个第二终端设备为通过3GPP网络接入的终端设备时，所述处理器1602在控制所述收发器1601通知所述任一个第二终端设备更新所述第一终端设备改变后的MAC地址时具体用于：控制所述收发器1601通过所述任一个第二终端设备当前接入的接入设备向所述任一个第二终端设备发送第三地址更新信息，所述第三地址更新信息包括所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，当任一个第二终端设备为通过固网接入的终端设备时，所述处理器1602在控制所述收发器1601通知所述任一个第二终端设备更新所述第一终端设备改变后的MAC地址时具体用于：控制所述收发器1601通过网络开放功能网元向所述任一个第二终端设备发送第四地址更新信息，所述第四地址更新信息包括所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，所述处理器1602在控制所述收发器1601通知任一个第二终端设备更新所述第一终端设备改变后的MAC地址时，具体用于：控制所述收发器1601通过第三设备向所述任一个第二终端设备发送第五地址更新信息，所述第五地址更新信息 包括所述第一终端设备改变后的MAC地址；其中，所述第三设备为所述任一个第二终端设备当前接入的用户面功能网元，或者，所述第三设备为所述任一个第二终端设备当前接入的合设设备，所述合设设备为接入设备和用户面功能网元合设的设备。
在一种可选的实施方式中，所述处理器1602还用于发起第一终端设备的原MAC地址的释放流程，其中所述第一终端设备的原MAC地址为所述第一终端设备移动前的MAC地址。
所述存储器1603，用于存放程序等。具体地，程序可以包括程序代码，该程序代码包括计算机操作指令。所述存储器1603可能包括RAM，也可能还包括非易失性存储器(non-volatile memory)，例如至少一个磁盘存储器。所述处理器1602执行所述存储器1603所存放的应用程序，实现上述功能，从而实现如图4-图11所示的移动性管理方法。
基于以上实施例，本申请实施例还提供了一种第一终端设备，所述第一终端设备用于实现如图4-图11所示的移动性管理方法。参阅图17所示，所述第一终端设备1700包括：可以包括收发器1701和处理器1702，可选的还可以包括存储器1703。
其中，所述处理器1702可以是中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)或者CPU和NP的组合等等。所述处理器1702还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device，CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(generic array logic，GAL)或其任意组合。所述处理器1702在实现上述功能时，可以通过硬件实现，当然也可以通过硬件执行相应的软件实现。
所述收发器1701和所述处理器1702之间相互连接。可选的，收发器1701和处理器1702通过总线1704相互连接；总线1704可以是外设部件互连标准(Peripheral Component Interconnect，PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture，EISA)总线等。总线可以分为地址总线、数据总线、控制总线等。为便于表示，图17中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
所述第一终端设备1700在执行图4-图11所示的实施例的移动性管理方法时，具体包括：
所述收发器1701用于与其他设备进行通信交互，收发数据。
所述处理器1702，用于控制所述收发器1701从控制面网元获得更新所述第一终端设备改变后的MAC地址的通知；并将MAC地址更新为所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，所述处理器1702在控制所述收发器1701从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知时，具体用于：
控制所述收发器1701接收所述控制面网元通过第一设备发送的第一地址更新信息，所述第一地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第一设备为所述第一终端设备移动后的目标接入设备；
或者，控制所述收发器1701接收所述控制面网元通过第二设备发送的第二地址更新信息，所述第二地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第二设备为所述第一终端设备移动后的目标用户面功能网元，或者，所述第二设备为所述第 一终端设备移动后的所述目标合设设备，其中所述目标合设设备为接入设备和用户面功能网元合设的设备。
所述存储器1703，用于存放程序等。具体地，程序可以包括程序代码，该程序代码包括计算机操作指令。所述存储器1703可能包括RAM，也可能还包括非易失性存储器(non-volatile memory)，例如至少一个磁盘存储器。所述处理器1702执行所述存储器1703所存放的应用程序，实现上述功能，从而实现如图4-图11所示的移动性管理方法。
基于以上实施例，本申请实施例还提供了一种第二终端设备，所述第二终端设备用于实现如图4-图11所示的移动性管理方法。参阅图18所示，所述第二终端设备1800包括：可以包括收发器1801和处理器1802，可选的还可以包括存储器1803。
其中，所述处理器1802可以是中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)或者CPU和NP的组合等等。所述处理器1802还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device，CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(generic array logic，GAL)或其任意组合。所述处理器1802在实现上述功能时，可以通过硬件实现，当然也可以通过硬件执行相应的软件实现。
所述收发器1801和所述处理器1802之间相互连接。可选的，收发器1801和处理器1802通过总线1804相互连接；总线1804可以是外设部件互连标准(Peripheral Component Interconnect，PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture，EISA)总线等。总线可以分为地址总线、数据总线、控制总线等。为便于表示，图18中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
所述第二终端设备1800在执行图4-图11所示的实施例的移动性管理方法时，具体包括：
所述收发器1801用于与其他设备进行通信交互，收发数据。
所述处理器1802，用于控制所述收发器1801从控制面网元获得更新所述第一终端设备改变后的MAC地址的通知；将缓存的所述第一终端设备的MAC地址更新为所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，当所述第二终端设备为通过3GPP网络接入的终端设备时，所述处理器1802在控制所述收发器1801从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知时具体用于：控制所述收发器1801接收所述控制面网元通过所述第二终端设备当前接入的接入设备发送的第三地址更新信息，所述第三地址更新信息包括所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，当所述第二终端设备为通过固网接入的终端设备时，所述处理器1802在控制所述收发器1801从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知时，具体用于：控制所述收发器1801接收所述会话管理功能网元通过网络开放功能网元发送的第四地址更新信息，所述第四地址更新信息包括所述第一终端设备改变后的MAC地址。
在一种可选的实施方式中，处理器1802在控制所述收发器1801从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知时，具体用于：控制所述收发器1801 接收所述控制面网元通过第三设备发送的第五地址更新信息，所述第五地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第三设备为所述第二终端设备当前接入的用户面功能网元，或者，所述第三设备为所述第二终端设备当前接入的合设设备，所述合设设备为接入设备和用户面功能网元合设的设备。
所述存储器1803，用于存放程序等。具体地，程序可以包括程序代码，该程序代码包括计算机操作指令。所述存储器1803可能包括RAM，也可能还包括非易失性存储器(non-volatile memory)，例如至少一个磁盘存储器。所述处理器1802执行所述存储器1803所存放的应用程序，实现上述功能，从而实现如图4-图11所示的移动性管理方法。
综上所述，通过本申请实施例提供一种移动性管理方法及装置，只需所述控制面网元决定移动的终端设备的MAC地址，并通知相应的终端设备更新，可以无需改变系统中的MAC地址转发表，从而可以灵活地实现转发路径的切换，保证终端设备移动过程中业务的连续性。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请实施例的范围。这样，倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (29)

  1. 一种移动性管理方法，应用于终端设备移动场景，其特征在于，包括：
    控制面网元在第一终端设备移动后，确定所述第一终端设备改变后的媒体访问控制地址MAC地址；
    所述控制面网元确定与所述第一终端设备归属于同一个终端设备群组的至少一个第二终端设备，其中所述第一终端设备为移动后地址发生改变的终端设备，所述至少一个第二终端设备为所述终端设备群组中除所述第一终端设备以外的终端设备；
    所述控制面网元通知所述第一终端设备和所述至少一个第二终端设备更新所述第一终端设备改变后的MAC地址。
  2. 如权利要求1所述的方法，其特征在于，所述控制面网元确定与所述第一终端设备归属于同一个终端设备群组的所述至少一个第二终端设备，包括：
    所述控制面网元从群组管理功能网元查询所述第一终端设备所在的终端设备群组的成员信息，所述成员信息包括所述终端设备群组包括的所有终端设备的标识；
    所述控制面网元根据所述成员信息确定所述至少一个第二终端设备。
  3. 如权利要求1或2所述的方法，其特征在于，所述控制面网元通知所述第一终端设备更新所述第一终端设备改变后的MAC地址，包括：
    所述控制面网元通过第一设备向所述第一终端设备发送第一地址更新信息，所述第一地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第一设备为所述第一终端设备移动后的目标接入设备；
    或者，所述控制面网元通过第二设备向所述第一终端设备发送第二地址更新信息，所述第二地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第二设备为所述第一终端设备移动后的目标用户面功能网元，或者，所述第二设备为所述第一终端设备移动后的目标合设设备，其中所述目标合设设备为接入设备和用户面功能网元合设的设备。
  4. 如权利要求1-3任一项所述的方法，其特征在于，当任一个第二终端设备为通过3GPP网络接入的终端设备时，所述控制面网元通知所述任一个第二终端设备更新所述第一终端设备改变后的MAC地址，包括：
    所述控制面网元通过所述任一个第二终端设备当前接入的接入设备向所述任一个第二终端设备发送第三地址更新信息，所述第三地址更新信息包括所述第一终端设备改变后的MAC地址。
  5. 如权利要求1-3任一项所述的方法，其特征在于，当任一个第二终端设备为通过固网接入的终端设备时，所述控制面网元通知所述任一个第二终端设备更新所述第一终端设备改变后的MAC地址，包括：
    所述控制面网元通过网络开放功能网元向所述任一个第二终端设备发送第四地址更新信息，所述第四地址更新信息包括所述第一终端设备改变后的MAC地址。
  6. 如权利要求1-3任一项所述的方法，其特征在于，所述控制面网元通知任一个第二终端设备更新所述第一终端设备改变后的MAC地址，包括：
    所述控制面网元通过第三设备向所述任一个第二终端设备发送第五地址更新信息，所述第五地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第三设备为 所述任一个第二终端设备当前接入的用户面功能网元，或者，所述第三设备为所述任一个第二终端设备当前接入的合设设备，所述合设设备为接入设备和用户面功能网元合设的设备。
  7. 如权利要求1-6任一项所述的方法，其特征在于，所述方法还包括：
    所述控制面网元发起第一终端设备的原MAC地址的释放流程，其中所述第一终端设备的原MAC地址为所述第一终端设备移动前的MAC地址。
  8. 一种移动性管理方法，应用于终端设备移动场景，其特征在于，包括：
    第一终端设备从控制面网元获得更新所述第一终端设备改变后的MAC地址的通知；
    所述第一终端设备将MAC地址更新为所述第一终端设备改变后的MAC地址。
  9. 如权利要求8所述的方法，其特征在于，所述第一终端设备从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知，包括：
    所述第一终端设备接收所述控制面网元通过第一设备发送的第一地址更新信息，所述第一地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第一设备为所述第一终端设备移动后的目标接入设备；
    或者，所述第一终端设备接收所述控制面网元通过第二设备发送的第二地址更新信息，所述第二地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第二设备为所述第一终端设备移动后的目标用户面功能网元，或者，所述第二设备为所述第一终端设备移动后的所述目标合设设备，其中所述目标合设设备为接入设备和用户面功能网元合设的设备。
  10. 一种移动性管理方法，应用于终端设备移动场景，其特征在于，包括：
    第二终端设备从控制面网元获得更新所述第一终端设备改变后的MAC地址的通知；
    所述第二终端设备将缓存的所述第一终端设备的MAC地址更新为所述第一终端设备改变后的MAC地址。
  11. 如权利要求10所述的方法，其特征在于，当所述第二终端设备为通过3GPP网络接入的终端设备时，所述第二终端设备从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知，包括：
    所述第二终端设备接收所述控制面网元通过所述第二终端设备当前接入的接入设备发送的第三地址更新信息，所述第三地址更新信息包括所述第一终端设备改变后的MAC地址。
  12. 如权利要求10所述的方法，其特征在于，当所述第二终端设备为通过固网接入的终端设备时，所述第二终端设备从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知，包括：
    所述第二终端设备接收所述会话管理功能网元通过网络开放功能网元发送的第四地址更新信息，所述第四地址更新信息包括所述第一终端设备改变后的MAC地址。
  13. 如权利要求10所述的方法，其特征在于，所述第二终端设备从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知，包括：
    所述第二终端设备接收所述控制面网元通过第三设备发送的第五地址更新信息，所述第五地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第三设备为所述第二终端设备当前接入的用户面功能网元，或者，所述第三设备为所述第二终端设备当前接入的合设设备，所述合设设备为接入设备和用户面功能网元合设的设备。
  14. 一种控制面网元，应用于终端设备移动场景，其特征在于，包括：
    处理单元，用于在第一终端设备移动后，确定所述第一终端设备改变后的媒体访问控制地址MAC地址；以及
    确定与所述第一终端设备归属于同一个终端设备群组的至少一个第二终端设备，其中所述第一终端设备为移动后地址发生改变的终端设备，所述至少一个第二终端设备为所述终端设备群组中除所述第一终端设备以外的终端设备；
    收发单元，用于通知所述第一终端设备和所述至少一个第二终端设备更新所述第一终端设备改变后的MAC地址。
  15. 如权利要求14所述的控制面网元，其特征在于，所述处理单元，在确定与所述第一终端设备归属于同一个终端设备群组的所述至少一个第二终端设备时，具体用于：
    从群组管理功能网元查询所述第一终端设备所在的终端设备群组的成员信息，所述成员信息包括所述终端设备群组包括的所有终端设备的标识；
    根据所述成员信息确定所述至少一个第二终端设备。
  16. 如权利要求14或15所述的控制面网元，其特征在于，所述收发单元，在通知所述第一终端设备更新所述第一终端设备改变后的MAC地址时，具体用于：
    通过第一设备向所述第一终端设备发送第一地址更新信息，所述第一地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第一设备为所述第一终端设备移动后的目标接入设备；
    或者，通过第二设备向所述第一终端设备发送第二地址更新信息，所述第二地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第二设备为所述第一终端设备移动后的目标用户面功能网元，或者，所述第二设备为所述第一终端设备移动后的目标合设设备，其中所述目标合设设备为接入设备和用户面功能网元合设的设备。
  17. 如权利要求14-16任一项所述的控制面网元，其特征在于，当任一个第二终端设备为通过3GPP网络接入的终端设备时，所述收发单元，在通知所述任一个第二终端设备更新所述第一终端设备改变后的MAC地址时，具体用于：
    通过所述任一个第二终端设备当前接入的接入设备向所述任一个第二终端设备发送第三地址更新信息，所述第三地址更新信息包括所述第一终端设备改变后的MAC地址。
  18. 如权利要求14-16任一项所述的控制面网元，其特征在于，当任一个第二终端设备为通过固网接入的终端设备时，所述收发单元，在通知所述任一个第二终端设备更新所述第一终端设备改变后的MAC地址时，具体用于：
    通过网络开放功能网元向所述任一个第二终端设备发送第四地址更新信息，所述第四地址更新信息包括所述第一终端设备改变后的MAC地址。
  19. 如权利要求14-16任一项所述的控制面网元，其特征在于，所述收发单元，在通知任一个第二终端设备更新所述第一终端设备改变后的MAC地址时，具体用于：
    通过第三设备向所述任一个第二终端设备发送第五地址更新信息，所述第五地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第三设备为所述任一个第二终端设备当前接入的用户面功能网元，或者，所述第三设备为所述任一个第二终端设备当前接入的合设设备，所述合设设备为接入设备和用户面功能网元合设的设备。
  20. 如权利要求14-19任一项所述的控制面网元，其特征在于，所述处理单元，还用于：
    发起第一终端设备的原MAC地址的释放流程，其中所述第一终端设备的原MAC地址为所述第一终端设备移动前的MAC地址。
  21. 一种第一终端设备，应用于终端设备移动场景，其特征在于，包括：
    收发单元，用于从控制面网元获得更新所述第一终端设备改变后的MAC地址的通知；
    处理单元，用于将MAC地址更新为所述第一终端设备改变后的MAC地址。
  22. 如权利要求21所述的第一终端设备，其特征在于，所述收发单元，在从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知时，具体用于：
    接收所述控制面网元通过第一设备发送的第一地址更新信息，所述第一地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第一设备为所述第一终端设备移动后的目标接入设备；
    或者，接收所述控制面网元通过第二设备发送的第二地址更新信息，所述第二地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第二设备为所述第一终端设备移动后的目标用户面功能网元，或者，所述第二设备为所述第一终端设备移动后的所述目标合设设备，其中所述目标合设设备为接入设备和用户面功能网元合设的设备。
  23. 一种第二终端设备，应用于终端设备移动场景，其特征在于，包括：
    收发单元，用于从控制面网元获得更新所述第一终端设备改变后的MAC地址的通知；
    处理单元，用于将缓存的所述第一终端设备的MAC地址更新为所述第一终端设备改变后的MAC地址。
  24. 如权利要求23所述的第二终端设备，其特征在于，当所述第二终端设备为通过3GPP网络接入的终端设备时，所述收发单元，在从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知时，具体用于：
    接收所述控制面网元通过所述第二终端设备当前接入的接入设备发送的第三地址更新信息，所述第三地址更新信息包括所述第一终端设备改变后的MAC地址。
  25. 如权利要求23所述的第二终端设备，其特征在于，当所述第二终端设备为通过固网接入的终端设备时，所述收发单元，在从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知时，具体用于：
    接收所述会话管理功能网元通过网络开放功能网元发送的第四地址更新信息，所述第四地址更新信息包括所述第一终端设备改变后的MAC地址。
  26. 如权利要求23所述的第二终端设备，其特征在于，所述收发单元，在从所述控制面网元获得更新所述第一终端设备改变后的MAC地址的通知时，具体用于：
    接收所述控制面网元通过第三设备发送的第五地址更新信息，所述第五地址更新信息包括所述第一终端设备改变后的MAC地址；其中，所述第三设备为所述第二终端设备当前接入的用户面功能网元，或者，所述第三设备为所述第二终端设备当前接入的合设设备，所述合设设备为接入设备和用户面功能网元合设的设备。
  27. 一种包含指令的计算机程序产品，其特征在于，当所述计算机程序产品在计算机上运行时，使得计算机执行如权利要求1-13任一项所述的方法。
  28. 一种计算机存储介质，其特征在于，所述计算机存储介质中存储有计算机程序，所述计算机程序被计算机执行时，使得所述计算机执行如权利要求1-13任一项所述的方法。
  29. 一种芯片，其特征在于，所述芯片与存储器耦合，用于读取并执行所述存储器中存储的程序指令，以实现如权利要求1-13任一项所述的方法。
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