WO2018170756A1 - 一种移动性管理的处理方法及装置 - Google Patents

一种移动性管理的处理方法及装置 Download PDF

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Publication number
WO2018170756A1
WO2018170756A1 PCT/CN2017/077597 CN2017077597W WO2018170756A1 WO 2018170756 A1 WO2018170756 A1 WO 2018170756A1 CN 2017077597 W CN2017077597 W CN 2017077597W WO 2018170756 A1 WO2018170756 A1 WO 2018170756A1
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WO
WIPO (PCT)
Prior art keywords
network element
paging
area
pdu session
terminal
Prior art date
Application number
PCT/CN2017/077597
Other languages
English (en)
French (fr)
Inventor
陆伟
靳维生
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 CN201780088462.5A priority Critical patent/CN110419249B/zh
Priority to EP17901993.0A priority patent/EP3592059A4/en
Priority to PCT/CN2017/077597 priority patent/WO2018170756A1/zh
Priority to EP23210408.3A priority patent/EP4346300A3/en
Priority to CN202110078126.0A priority patent/CN112770266B/zh
Priority to CN202110078129.4A priority patent/CN112770391A/zh
Publication of WO2018170756A1 publication Critical patent/WO2018170756A1/zh
Priority to US16/578,011 priority patent/US11146943B2/en
Priority to US17/478,614 priority patent/US11812503B2/en

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Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/029—Location-based management or tracking services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/04—User notification, e.g. alerting and paging, for incoming communication, change of service or the like multi-step notification using statistical or historical mobility data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/005—Transmission of information for alerting of incoming communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/08—User notification, e.g. alerting and paging, for incoming communication, change of service or the like using multi-step notification by increasing the notification area
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a method and an apparatus for processing mobility management.
  • a terminal establishes protocol data through a User Plane Function (UPF) network element and a Data Network (DN) network element.
  • UPF User Plane Function
  • DN Data Network
  • PDU Protocol Data Unit
  • the PDU session provides a PDU connection service between the terminal and the DN network element.
  • the PDU session has three Session and Service Continuity (SSC) modes, namely: SSC Mode 1, SSC Mode 2, and SSC Mode 3.
  • SSC Session and Service Continuity
  • SSC mode 1 In this mode, after the terminal establishes a PDU session, the UPF network element of the PDU session acts as an anchor point for the terminal, that is, the PDU session is not used, regardless of whether the terminal moves to any area or any access technology. Any form of interruption will occur due to the movement of the terminal.
  • SSC mode 2 In this mode, after the terminal establishes a PDU session, when the terminal moves, if the terminal leaves the service area of the UPF network element, the network can reselect the UPF network element for the PDU session of the terminal, triggering the original UPF network element. Serving the PDU session and enabling the terminal to establish a PDU session after reselecting the UPF network element.
  • the UPF network element can be considered to have a specific service area.
  • the terminal moves in the service area, the UPF network element is a terminal service, and if the terminal leaves the service area, the network side can determine the The UPF network element cannot serve the terminal.
  • the PDU session established through the UPF network element will be interrupted.
  • SSC mode 3 In this mode, after the terminal establishes a PDU session, the service area of the UPF network element also has a range. After the terminal leaves the service area of the UPF network element, the network selects a new UPF network element for the terminal as the terminal. Service, the terminal establishes a PDU session with the original DN network element through the new UPF network element. However, unlike the foregoing SSC mode 2, the PDU session established by the terminal through the old UPF network element may temporarily not release the connection, but is new. The PDU session is established after the session is established.
  • the network side When the terminal is in the idle state after the terminal establishes the PDU session, when the UPF network element receives the downlink data packet of the terminal or the core network device such as the UPF network element triggers the control signaling process, the network side must first be in the tracking area list (Tracking Area). List, TA List) paging terminal within range.
  • the paging is the granularity of the PDU session, that is, the terminal establishes a connection with the network side for the PDU session according to the PDU session paging terminal to which the downlink data packet or the control signaling belongs.
  • the terminal may not be located in the service area of the UPF network element.
  • the PDU session is The UPF network element may be reselected, causing the PDU session to be released. Therefore, in this case, paging the terminal within the range of the TA list does not accurately page, which reduces the efficiency of paging.
  • the present application provides a method and an apparatus for processing mobility management, which are used to solve the problem of how to effectively manage mobility of a terminal and enable the terminal to quickly access the network.
  • An embodiment of the present application provides a method for processing mobility management, where the method includes:
  • the session management function SMF network element receives the user plane function, and the protocol data unit PDU session is sent by the UPF network element. Determining the data notification message, and determining, according to the PDU session identifier, a session and a service continuity SSC mode and/or a user plane function UPF network element service area corresponding to the PDU session identifier, where the UPF network element is The network element of the PDU session corresponding to the PDU session identifier;
  • the SMF network element may determine the SSC mode corresponding to the PDU session identifier and/or the service area of the UPF network element according to the PDU session identifier. , thereby determining a paging area of the paging terminal, and instructing the AMF network element to page the terminal according to the paging area.
  • the determined paging area is smaller than or equal to the area indicated by the tracking area list of the terminal corresponding to the PDU session, so that it is possible to determine whether the terminal can be paged faster, thereby improving the access efficiency of the terminal.
  • the SMF network element determines the paging area according to the SSC mode and/or the service area of the UPF network element, including:
  • the SMF network element determines that the SSC mode is SSC mode 2, the service area is used as a paging area; or
  • the SMF network element determines that the SSC mode is SSC mode 1 or SSC mode 3, the area indicated by the tracking area list is used as a paging area; or
  • the SMF network element determines a paging area according to the tracking area list and a service area of the UPF network element.
  • the SMF network element determines the paging area according to the tracking area list and the service area of the UPF network element, including:
  • the SMF network element determines an area in which the service area overlaps with an area indicated by the tracking area list as the paging area.
  • the first message further includes a paging policy
  • the paging policy includes one or more of the following:
  • Number of pagings the number of pagings indicating that the AMF network element pages the number of terminals
  • a paging period indicates a period during which the AMF network element pages the terminal
  • the paging indication information indicating a manner in which the AMF network element pages the terminal.
  • the paging indication information indicates that the AMF network element pages the terminal in an area indicated by the tracking area list if the paging response is not received in the paging area.
  • the method further includes:
  • the SMF network element starts a first timer
  • the SMF network element determines that the AMF network element does not receive the paging response after the first timer expires, the SMF network element sends the packet loss indication information to the UPF network element, where the packet loss indication information is used. And instructing the UPF network element to discard downlink data received by the terminal.
  • the SMF network element determines that the AMF network element does not receive the paging response of the terminal, and then instructs the UPF network element to discard the downlink data packet received by the terminal.
  • the IP address of the terminal device may need to be changed, which may result in a PDU session. Will be interrupted, then, these packets may not be able to be sent to the terminal, so you can discard the packets, which can save UPF Network resources of network elements to improve system operation efficiency.
  • the embodiment of the present application provides a processing device for mobility management, which can implement any one of the foregoing embodiments of the mobility management method provided by any of the foregoing methods.
  • the apparatus includes a plurality of functional modules, including, for example, a processing unit and a transceiver unit for implementing the processing method of the mobility management provided above.
  • the apparatus includes a processor and a transceiver configured to support a corresponding function of the apparatus for performing the mobility management described above.
  • the transceiver is configured to support communication between the device and other devices, and to receive or transmit messages or instructions involved in the processing method of the mobility management to other devices.
  • the apparatus can also include a memory for coupling with the processor that retains the program instructions and data necessary for the apparatus.
  • An embodiment of the present application provides a method for processing mobility management, where the method includes:
  • the mobility management function AMF network element receives a first message including a paging area sent by the session management function SMF network element, and the paging area is the SMF network element according to the session and service continuity SSC mode and/or the user plane function. Determining, by the service area of the UPF network element, the service area of the SSC mode and/or the UPF network element is determined by the SMF network element according to the acquired protocol data unit PDU session identifier, where the UPF network element is established The network element of the PDU session corresponding to the PDU session identifier;
  • the AMF network element pages a terminal in the paging area that establishes a PDU session corresponding to the PDU session identifier by using the UPF network element.
  • the AMF network element may page the terminal according to the paging area.
  • the paging area is determined by the SSC mode corresponding to the PDU session identifier of the SMF network element terminal and/or the service area of the UPF network element, and is less than or equal to the area indicated by the tracking area list of the terminal corresponding to the PDU session, thereby It is possible to determine more quickly whether the terminal can be paged, thereby improving the access efficiency of the terminal.
  • the AMF network element in the paging area, paging the terminal that establishes the PDU session corresponding to the PDU session identifier by using the UPF network element, including:
  • the AMF network element sends a second message to the radio access network network element, where the second message includes a paging area, and the second message is used to trigger the radio access network element according to the paging area. Paging the terminal.
  • the paging area in the second message is used by the radio access network element to determine that the radio access network element pages the paging area of the terminal.
  • the first message further includes a paging policy
  • the paging policy includes one or more of the following:
  • Number of pagings the number of pagings being used to indicate the number of times the terminal is paged
  • the homing period is used to indicate a period of paging the terminal
  • the paging indication information is used to indicate a manner of paging the terminal.
  • the paging indication information indicates that the AMF network element pages the terminal in an area indicated by the tracking area list if the paging response is not received in the paging area.
  • An embodiment of the present application provides a method for processing mobility management, where the method includes:
  • the session management function SMF network element receives a data notification message including a protocol data unit PDU session identifier sent by the user plane function UPF network element, and determines a session and service continuity SSC mode corresponding to the PDU session identifier according to the PDU session identifier and At least one of the service areas of the UPF network element, where the UPF network element is an establishment a network element of the PDU session corresponding to the PDU session identifier;
  • the method further includes:
  • the SMF network element starts a first timer
  • the SMF network element determines that the paging response is not received after the first timer expires, the downlink data packet of the received terminal is discarded.
  • the embodiment of the present application provides a processing device for mobility management, which can implement any one of the foregoing embodiments of the mobility management method provided by any of the foregoing methods.
  • the apparatus includes a plurality of functional modules, including, for example, a processing unit and a transceiver unit for implementing the processing method of the mobility management provided above.
  • the apparatus includes a processor and a transceiver configured to support a corresponding function of the apparatus for performing the mobility management described above.
  • the transceiver is configured to support communication between the device and other devices, and to receive or transmit messages or instructions involved in the processing method of the mobility management to other devices.
  • the apparatus can also include a memory for coupling with the processor that retains the program instructions and data necessary for the apparatus.
  • An embodiment of the present application provides a method for processing mobility management, where the method includes:
  • the mobility management function AMF network element receives a first message sent by the session management function SMF network element, where the first message includes at least one of a session and a service continuity SSC mode and a service area of the user plane function UPF network element.
  • the SSC mode and the service area are determined by the SMF network element according to the acquired protocol data unit PDU session identifier, and the service area is a user plane function UPF network element that establishes a PDU session corresponding to the PDU session identifier.
  • Service area
  • the AMF network element determines a paging area according to the SSC mode and at least one of the service areas, and pages a terminal that establishes the PDU session by using the UPF network element in the paging area.
  • the AMF network element determines the paging area according to the SSC mode and the at least one of the service areas, including:
  • the AMF network element determines that the SSC mode is the SSC mode 1, the area indicated by the tracking area list is determined as the paging area; or
  • the service area is determined as the paging area, or the overlapping coverage area of the service area and the tracking area list is determined as The paging area.
  • the AMF network element paging the terminal that establishes the PDU session by using the UPF network element in the paging area, including:
  • the AMF network element sends a second message to the radio access network network element, where the second message includes a paging area, and the second message is used to trigger the radio access network element according to the paging area. Paging the terminal.
  • the second message further includes a paging policy
  • the paging policy includes one or more of the following:
  • Number of pagings the number of paging times is used to indicate the number of times the radio access network network element pages the terminal;
  • a paging period where the homing period is used to indicate a period in which the radio access network element pages the terminal;
  • the paging indication information is used to indicate a manner in which the radio access network network element pages the terminal.
  • the paging indication information indicates that the radio access network network element pages the terminal in an area indicated by the tracking area list if a paging response is not received in the paging area.
  • the embodiment of the present application provides a processing device for mobility management, which can implement any one of the foregoing embodiments of the mobility management method provided by any of the foregoing methods.
  • the apparatus includes a plurality of functional modules, including, for example, a processing unit and a transceiver unit for implementing the processing method of the mobility management provided above.
  • the apparatus includes a processor and a transceiver configured to support a corresponding function of the apparatus for performing the mobility management described above.
  • the transceiver is configured to support communication between the device and other devices, and to receive or transmit messages or instructions involved in the processing method of the mobility management to other devices.
  • the apparatus can also include a memory for coupling with the processor that retains the program instructions and data necessary for the apparatus.
  • the embodiment of the present application provides a processing method for mobility management, where the method includes:
  • the session management function SMF network element receives the data notification message of the protocol data unit PDU session identifier sent by the user plane function UPF network element; the PDU session identifier is that the terminal establishes the PDU session corresponding to the PDU session identifier by using the UPF network element.
  • the SMF network element determines whether to trigger establishment of a user plane transmission channel according to the service area and the SSC mode of the PDU session.
  • the SMF network element determines, according to the service area and the SSC mode of the PDU session, whether to trigger the establishment of a user plane transmission channel, including:
  • the SMF network element determines that the SSC mode of the PDU session is SSC mode 2, and the terminal is located in the service area, triggering establishment of the user plane transmission channel; or
  • the SMF network element determines that the SSC mode of the PDU session is SSC mode 2, and the terminal is not located in the service area, the data notification message is ignored.
  • the method further includes:
  • the SMF sends the packet loss indication information to the UPF network element, where the packet loss indication information is used to indicate that the UPF network element discards the downlink data that is received by the terminal.
  • the embodiment of the present application provides a processing device for mobility management, which can implement any one of the foregoing embodiments of the mobility management method provided by any of the foregoing methods.
  • the apparatus includes a plurality of functional modules, including, for example, a processing unit and a transceiver unit for implementing the processing method of the mobility management provided above.
  • the apparatus includes a processor and a transceiver configured to support a corresponding function of the apparatus for performing the mobility management described above.
  • the transceiver is configured to support communication between the device and other devices, and to receive or transmit messages or instructions involved in the processing method of the mobility management to other devices.
  • the apparatus can also include a memory for coupling with the processor that retains the program instructions and data necessary for the apparatus.
  • An embodiment of the present application provides a method for processing mobility management, where the method includes:
  • Mobility management function AMF network element receives the session management function SMF network element sends the protocol data unit PDU will
  • the PDU session information includes at least one of the following: an SSC mode of the first PDU session; and a service area of the user plane function UPF network element that establishes the first PDU session;
  • the AMF network element determines an area indicated by the tracking area list according to the PDU session information.
  • the method further includes:
  • the AMF network element sends the tracking area list to the terminal.
  • the embodiment of the present application provides a processing device for mobility management, which can implement any one of the foregoing embodiments of the mobility management method provided by any of the foregoing methods.
  • the apparatus includes a plurality of functional modules, including, for example, a processing unit and a transceiver unit for implementing the processing method of the mobility management provided above.
  • the apparatus includes a processor and a transceiver configured to support a corresponding function of the apparatus for performing the mobility management described above.
  • the transceiver is configured to support communication between the device and other devices, and to receive or transmit messages or instructions involved in the processing method of the mobility management to other devices.
  • the apparatus can also include a memory for coupling with the processor that retains the program instructions and data necessary for the apparatus.
  • An embodiment of the present application provides a method for processing mobility management, where the method includes:
  • the session management function SMF network element acquires a protocol data unit PDU session identifier of the terminal and location information of the terminal;
  • the AMF network element determines to reselect the UPF network element of the first PDU session corresponding to the PDU session identifier according to the PDU session identifier and the location information of the terminal, the AMF network element is triggered by the mobility management function.
  • the terminal initiates a process of establishing a second PDU session.
  • the SMF network element triggers the terminal to establish a second PDU session by using a mobility management function AMF network element, including:
  • the SMF network element determines PDU session state information, and sends the PDU session state information to the terminal by using the AMF network element, where the PDU session state information indicates that the terminal initiates a process of establishing a second PDU session.
  • the method further includes:
  • the SMF network element receives a data notification message including application information sent by the UPF network element of the first PDU session, where the data notification message is that the UPF network element of the first PDU session receives the downlink data packet of the terminal Sent.
  • the method further includes:
  • the SMF network element sends the application information to the AMF network element, where the application information is used to notify the terminal to trigger application information of the paging process.
  • the embodiment of the present application provides a processing device for mobility management, which can implement any one of the foregoing embodiments of the mobility management method provided by any of the foregoing methods.
  • the apparatus includes a plurality of functional modules, including, for example, a processing unit and a transceiver unit for implementing the processing method of the mobility management provided above.
  • the apparatus includes a processor and a transceiver configured to support a corresponding function of the apparatus for performing the mobility management described above.
  • the transceiver is configured to support communication between the device and other devices, and to receive or transmit messages or instructions involved in the processing method of the mobility management to other devices.
  • the apparatus can also include a memory for coupling with the processor that retains the program instructions and data necessary for the apparatus.
  • An embodiment of the present application provides a method for processing mobility management, where the method includes:
  • the session management function SMF network element receives the service restriction area information sent by the AMF network element of the mobility management function;
  • the SMF selects a user plane function UPF network element for the terminal according to the service restriction area information, where the UPF network element is used to establish a PDU session for the terminal.
  • the embodiment of the present application further provides a processing device for mobility management, the device includes a processor and a memory, the memory is used to store a software program, and the processor is configured to read a software program stored in the memory and implement The processing method of mobility management provided by any of the above designs.
  • the device can be a mobile terminal, a computer, or the like.
  • the embodiment of the present application further provides a computer storage medium, where the software program stores a software program, and the software program can implement the mobility management provided by any one of the above designs when being read and executed by one or more processors. Approach.
  • the embodiment of the present application further provides a communication system, which includes the processing device for mobility management provided by any one of the foregoing designs.
  • the system may further include the solution and the mobile solution provided by the embodiment of the present application.
  • Other devices that the sexually managed processing device interacts with are possible.
  • the embodiment of the present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method described in the above aspects.
  • Figure 1 is a schematic diagram of a first possible 5G network architecture
  • FIG. 2 is a schematic diagram of a second possible 5G network architecture
  • Figure 3 is a schematic diagram of a third possible 5G network architecture
  • FIG. 4 is a schematic flowchart of a processing method of mobility management provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a tracking area update process according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a processing procedure of mobility management according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic flowchart of a method for processing mobility management according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of a processing procedure of mobility management according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic flowchart of a method for processing mobility management according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic flowchart of a method for processing mobility management according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic flowchart of a method for processing mobility management according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic flowchart of a method for processing mobility management according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic diagram of a service restriction area according to an embodiment of the present application.
  • FIG. 14 is a schematic flowchart of a method for processing mobility management according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic flowchart of a PDU session establishment process according to an embodiment of the present application.
  • FIG. 16 is a schematic flowchart of a PDU session establishment process according to an embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of a processing apparatus for mobility management according to an embodiment of the present disclosure.
  • FIG. 18 is a schematic structural diagram of a processing apparatus for mobility management according to an embodiment of the present disclosure.
  • FIG. 19 is a schematic structural diagram of a processing apparatus for mobility management according to an embodiment of the present disclosure.
  • FIG. 20 is a schematic structural diagram of a processing apparatus for mobility management according to an embodiment of the present disclosure.
  • FIG. 21 is a schematic structural diagram of a processing apparatus for mobility management according to an embodiment of the present disclosure.
  • FIG. 22 is a schematic structural diagram of a processing apparatus for mobility management according to an embodiment of the present disclosure.
  • FIG. 23 is a schematic structural diagram of a processing apparatus for mobility management according to an embodiment of the present disclosure.
  • FIG. 24 is a schematic structural diagram of a processing apparatus for mobility management according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • Wideband Wideband Code Division Multiple Access
  • Code Division Multiple Access WCDMA
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • UMTS Universal Mobile Telecommunication System
  • eLTE evolved Long Term Evolution
  • 5G 5G
  • FIG. 1 to FIG. 3 schematic diagrams of the first to third possible 5G network architectures, respectively.
  • the RAN network element and the DN network element include one UPF network element; in the network architecture shown in FIG. 2, the RAN network element and the DN network element include two parallel connections.
  • the system shown in FIG. 1 to FIG. 3 includes an Authentication Server Function (AUSF) network element, a unified database management function (UDM), and an access and mobility management function (Access and Mobility Management Function).
  • AMF Access and Mobility Management Function
  • AMF Access and Mobility Management Function
  • SMF session management function
  • PCF policy control function
  • AF policy control function
  • RAN radio access network
  • AN access network
  • the SMF network element is responsible for session management, Internet Protocol (IP) address allocation and management of the terminal, allocation and selection of the UP anchor function, and is responsible for (heavy) selection of the UPF and user plane paths.
  • IP Internet Protocol
  • the AMF network element is responsible for access and mobility management. It is the endpoint of the interface between NG2 (the interface between AMF and RAN devices), which terminates NAS messages, completes registration management, connection management and reachability management, allocates TA lists, and moves. Sex management, etc., and transparent routing session management (SMS) messages to SMF network elements.
  • the UPF network element is a user plane function device, which is responsible for routing and forwarding of data packets, lawful interception, and downlink data packet buffering and triggering downlink data packet notification messages.
  • a terminal also referred to as a user equipment (User Equipment) is a device that provides voice and/or data connectivity to a user, for example, has a wireless connection function.
  • Handheld devices in-vehicle devices, etc.
  • Common terminals include, for example, mobile phones, tablets, notebook computers, PDAs, mobile internet devices (MIDs), wearable devices such as smart watches, smart bracelets, pedometers, and the like.
  • FIG. 4 it is a schematic flowchart of a method for processing mobility management according to an embodiment of the present application.
  • the method includes:
  • Step 401 The SMF network element receives the data notification message that is sent by the UPF network element, including the PDU session identifier, and determines the SSC mode corresponding to the PDU session identifier and/or the service area of the UPF network element according to the PDU session identifier.
  • the UPF network element is a network element that establishes a PDU session corresponding to the PDU session identifier.
  • Step 402 The SMF network element determines a paging area according to the SSC mode and/or a service area of the UPF network element.
  • the paging area determined by the SMF network element is less than or equal to the tracking of the terminal corresponding to the PDU session.
  • Step 403 The SMF network element sends a first message including the paging area to the access and the AMF network element, where the first message is used to trigger the AMF network element to page through the paging area.
  • the UPF network element establishes a terminal of the PDU session.
  • Step 404 The AMF network element receives a first message including a paging area sent by the SMF network element, where the paging area is determined by the SMF network element according to an SSC mode and/or a service area of a user plane function UPF network element.
  • the service area of the SSC mode and/or the UPF network element is determined by the SMF network element according to the acquired PDU session identifier, where the UPF network element is a network element that establishes a PDU session corresponding to the PDU session identifier. .
  • Step 405 The AMF network element advertises, in the paging area, a terminal that establishes a PDU session corresponding to the PDU session identifier by using the UPF network element.
  • step 401 after the terminal establishes a PDU session, when there is no non-access stratum (NAS) signaling connection and data transmission between the terminal and the AMF network element, the terminal is in an idle state, and the N2 interface (AMF network element)
  • the interface between the signaling connection with the RAN network element and the N3 interface (the interface between the RAN network element and the UPF network element) data (user plane) transmission channel connection does not exist.
  • the UPF network element may determine the PDU session identifier of the PDU session to which the downlink data packet or control signaling belongs.
  • the UPF network element may send a data notification message including the PDU session identifier to the SMF network element, thereby notifying the network device (for example, the SMF network element/AMF network element)
  • the network element pages the terminal to send downlink data packets to the terminal.
  • the PDU session identifier can uniquely identify a PDU session, and the PDU session is established by the terminal through the UPF network element and the data network, each SPDU session is established and the SSC mode of the PDU session is determined, so the SMF network element can be configured according to the The PDU session identifier determines at least one of an SSC mode corresponding to the PDU session identifier and a service area of a UPF network element that establishes the PDU session identifier.
  • step 402 there are various ways in which the SMF network element determines the paging area, which is described in detail below.
  • the SMF network element determines that the SSC mode of the PDU session corresponding to the PDU session identifier is SSC mode 2, the service of the UPF network element that establishes the PDU session may be established.
  • the area acts as a paging area.
  • the paging area may be the same as or different from the service area of the UPF network element.
  • the SMF network element can determine the historical area that the terminal has in the service area as the paging area according to the historical location of the terminal, and the paging area is smaller than the service area of the UPF network element.
  • the SMF network element determines that the SSC mode of the PDU session is SSC mode 1 or SSC mode 3, the area indicated by the tracking area list is used as the paging area.
  • the SMF network element determines a paging area according to the tracking area list and a service area of the UPF network element. Specifically, the SMF network element may determine, as the paging area, an area where the service area overlaps with an area indicated by the tracking area list.
  • the tracking area list is allocated by the mobility management network element (such as the AMF network element), indicating a location area.
  • the tracking area update process is not initiated.
  • the tracking area update process is initiated.
  • the tracking area update process is initiated in order to enable the mobile network to know the location area where the terminal is located, so that the mobility management process can be performed more effectively.
  • the tracking area update process may also be referred to as a mobile registration update process. Process The backup is re-registered with its current location on the network side.
  • the AMF network element may send the tracking area list to the SMF network element after generating the tracking area list.
  • the manner in which the AMF network element sends the tracking area list to the SMF network element is not limited in this embodiment.
  • the AMF network element may send the tracking area list in the process of the terminal registering with the mobile communication network, or may send the tracking area list to the SMF network element during the tracking area update process of the terminal.
  • FIG. 5 it is a schematic diagram of a tracking area update process provided by an embodiment of the present application. In Figure 5, it includes:
  • Step 501 The terminal sends a Tracking Area Update (TAU) or a Mobility Registration Update (MRU) request message to the AMF network element to trigger the tracking area update process of the terminal.
  • TAU Tracking Area Update
  • MRU Mobility Registration Update
  • Step 502 After receiving the TAU or MRU request message, the AMF network element generates a tracking area list.
  • the specific manner of the AMF network element to generate the tracking area list is not limited in this embodiment of the present application.
  • Step 503 The AMF network element sends an SM request message including a tracking area list to the SMF network element.
  • the purpose of this step is to notify the SMF network element of the tracking area list.
  • the process of sending the tracking area list to the SMF network element by the AMF network element is not limited to the message, and may also be completed in other messages.
  • Step 504 The AMF network element sends a TAU accept message including a tracking area list to the terminal.
  • step 503 and step 504 are not limited.
  • the SMF network element may also start the first timer; the timing duration of the first timer is a preset duration, and the size of the preset duration may be determined according to a specific situation, which is not limited in this embodiment of the present application. If the SMF network element determines that the AMF network element does not receive the paging response after the first timer expires, the service request process triggered by the paging process not being received within a certain period of time may be considered as not received. And sending a packet loss indication information to the UPF network element, where the packet loss indication information is used to indicate that the UPF network element discards the downlink data packet that is received by the terminal.
  • the UPF network element may also start a second timer, for example, after receiving the downlink data packet of the terminal or sending a data notification message to the SMF network element. If the AMF network element determines that the AMF network element does not receive the paging response after the second timer expires, the UPF network element discards the downlink data packet that is received by the terminal.
  • the timing of the second timer may be determined according to a specific situation, which is not limited by the embodiment of the present application.
  • the SMF network element determines that the AMF network element does not receive the paging response of the terminal within a certain period of time, and instructs the UPF network element to discard the downlink data packet that receives the terminal.
  • the IP address of the terminal device may need to be changed, which may result in a PDU session. It will be interrupted. Then, these data packets may not be sent to the terminal again, so the data packets can be discarded, thereby saving network resources of the UPF network element and improving system operation efficiency.
  • the SMF network element may start the first timer after receiving the data notification message, or may start the first timer when sending the first message to the AMF network element, which may be based on actual conditions. The situation is determined, and the embodiment of the present application does not limit this.
  • the SMF network element may further send a paging policy to the AMF network element by using the first message.
  • the paging policy may include one or more of the following:
  • Number of pagings the number of pagings indicating that the AMF network element pages the number of terminals
  • a paging period indicates a period during which the AMF network element pages the terminal
  • the paging indication information indicating a manner in which the AMF network element pages the terminal.
  • the paging indication information may indicate that the AMF network element pages the terminal in an area indicated by the tracking area list if a paging response is not received in the paging area.
  • the paging indication information may not be sent, but the AMF network element may be implicitly instructed to page the terminal in the area indicated by the paging area and the tracking area list respectively, for example, sending the paging area and the tracking area to the AMF network element.
  • the first message of the list thereby implementing the indication that the AMF network element pages the terminal in the area indicated by the tracking area list if the paging response is not received in the paging area.
  • the first message may also include information such as a PDU session identifier, and details are not described herein again.
  • the AMF network element may send a second message to the radio access network network element in step 405, where the second message includes a paging area, and the second message is used. Triggering the radio access network element to page the terminal according to the paging area.
  • the radio access network element determines that the paging area for paging the terminal is based on information of some access networks, and the paging area sent by the AMF network element through the second message may be only the radio access network element determining the paging.
  • One of the factors of the paging area of the terminal, so the paging area in the second message may be different from the paging area of the radio access network element paging the terminal. Therefore, the paging area in the second message may be used by the radio access network element to determine that the radio access network element pages the paging area of the terminal.
  • the AMF network element may further send a paging policy and the like to the radio access network element by using the second message, where the radio access network element may be configured according to the paging area and the paging.
  • the policy pages the terminal.
  • the AFM may further indicate the The radio access network element pages the terminal in the area indicated by the tracking area list.
  • FIG. 6 is a schematic diagram of a processing procedure of mobility management provided by an embodiment of the present application.
  • the terminal Before the paging process shown in Figure 6, the terminal establishes a PDU session with the DN network element through the UPF network element, and then the terminal transits to the idle state.
  • Step 601 After receiving the downlink data packet of the PDU session, the UPF network element sends a data notification message to the SMF network element, where the data notification message includes information such as the PDU session identifier of the PDU session.
  • Step 602 The SMF network element determines, according to the PDU session identifier, a UPF network element that establishes a connection for the PDU session corresponding to the PDU session identifier, and determines the paging area according to the service area of the UPF network element and the SSC mode of the PDU session.
  • the SMF network element may start the first timer, and if the paging response is not received after the first timer expires, send the packet loss indication information to the UPF network element.
  • Step 603 The SMF network element sends a first message to the AMF network element.
  • the first message may include a PDU session identifier, a paging area, and a paging policy.
  • the first message may be referred to as an N11 message, and the N11 message is temporarily determined in the current protocol and may be modified in the future.
  • Step 604 The AMF network element sends a second message to the network element of the radio access network, where the second message may include a paging area, a tracking area list, a paging policy, and the like.
  • Step 605 The RAN network element sends a paging message to the terminal according to information such as a paging area and/or a paging policy, thereby paging the terminal.
  • the SMF network element After receiving the data notification message including the PDU identifier, the SMF network element determines the service area and the SSC mode of the UPF network element corresponding to the PDU identifier according to the PDU identifier, thereby, according to the service area and the SSC mode of the UPF network element.
  • a paging area is determined and the AMF is instructed to page the terminal according to the paging area.
  • the determined paging area is smaller than or equal to the area indicated by the tracking area list of the terminal corresponding to the PDU session, so that it is possible to determine whether the terminal can be paged faster, thereby improving the access efficiency of the terminal.
  • the paging area may be determined by the AMF network element.
  • FIG. 7 the flowchart of the processing method of the mobility management provided by the embodiment of the present application is shown. The method includes:
  • Step 701 The SMF network element receives a data notification message including a PDU session identifier sent by the UPF network element, and determines, according to the PDU session identifier, an SSC mode corresponding to the PDU session identifier and at least a service area of the UPF network element.
  • the UPF network element is a network element that establishes a PDU session corresponding to the PDU session identifier.
  • Step 702 The SMF network element sends a first message to the AMF network element, where the first message includes at least one of the SSC mode and the service area, where the first message is used to trigger the AMF.
  • the network element pages establish a terminal of the PDU session through the UPF network element.
  • Step 703 The AMF network element receives the first message sent by the SMF network element, where the first message includes at least one of an SSC mode and a service area of the UPF network element, where the SSC mode and the service area are The SMF network element is determined according to the obtained PDU session identifier, and the service area is a service area of a user plane function UPF network element that establishes a PDU session corresponding to the PDU session identifier.
  • Step 704 The AMF network element determines a paging area according to the SSC mode and at least one of the service areas, and pages the establishment of the PDU session by using the UPF network element in the paging area. terminal.
  • the paging area is smaller than or equal to an area indicated by the tracking area list of the terminal corresponding to the PDU session.
  • step 701 after the terminal establishes a PDU session, when there is no NAS signaling connection between the terminal and the AMF network element, the terminal is in an idle state.
  • the UPF network element may determine the PDU session identifier of the PDU session to which the downlink data packet or control signaling belongs. .
  • the UPF network element packet may send a data notification message including the PDU session identifier to the SMF network element, thereby notifying the SMF network element that the paging terminal is required to send the downlink data packet to the terminal.
  • the SMF network element may determine, according to the PDU session identifier, an SSC mode corresponding to the PDU session identifier and a service area of the UPF network element that establishes the PDU session identifier. At least one.
  • the SMF network element may also start the first timer; the timing duration of the first timer is a preset duration, and the size of the preset duration may be determined according to a specific situation, which is not limited in this embodiment of the present application. If the SMF network element determines that the paging response is not received after the first timer expires, the packet is sent to the UPF network element, where the packet loss indication information is used to indicate the UPF. The network element discards the downlink data packet received by the terminal.
  • the UPF network element may also start a second timer, for example, after receiving the downlink data packet of the terminal or sending a data notification message to the SMF network element. If the UPF network element determines that the paging response is not received after the second timer expires, the downlink data packet received by the terminal is discarded.
  • the timing of the second timer may be determined according to a specific situation, which is not limited by the embodiment of the present application.
  • the SMF network element determines that the AMF network element does not receive the paging response of the terminal within a certain period of time, and instructs the UPF network element to discard the downlink data packet received by the terminal, thereby saving network resources of the UPF network element. Improve system operation efficiency.
  • the first message sent by the SMF network element to the AMF network element may further include information such as a PDU session identifier.
  • step 703 there are various ways for the AMF network element to determine the paging area, which is described in detail below.
  • the AMF network element determines that the SSC mode is the SSC mode 1
  • the area indicated by the tracking area list is determined as the paging area.
  • the AMF network element determines that the SSC mode is SSC mode 2 or SSC mode 3, the service area is determined as the paging area.
  • the paging area may be the same as or different from the service area of the UPF network element.
  • the SMF network element can determine the historical area that the terminal has in the service area as the paging area according to the historical location of the terminal, and the paging area is smaller than the service area of the UPF network element.
  • the AMF network element determines that the SSC mode is SSC mode 2 or SSC mode 3, determining an overlapping coverage area of the service area and the tracking area list as the Paging area.
  • the AMF may further determine a paging policy, where the paging policy may include one or more of the following:
  • Number of pagings the number of paging times is used to indicate the number of times the radio access network network element pages the terminal;
  • a paging period where the homing period is used to indicate a period in which the radio access network element pages the terminal;
  • the paging indication information is used to indicate a manner in which the radio access network network element pages the terminal. For example, the paging indication information indicates that the radio access network network element pages the terminal in an area indicated by the tracking area list if a paging response is not received in the paging area.
  • the AMF network element may also not send the paging indication information, but implicitly instruct the radio access network element to page the terminal in the area indicated by the paging area and the tracking area list, for example, to the radio access network.
  • the AMF network element may send a second message to the network element of the radio access network, where the second message includes a paging area, and the second message is used to trigger the network element of the radio access network according to the The paging area pages the terminal.
  • the second message may further include information such as a PDU session identifier and a paging policy.
  • the radio access network element performs the paging according to the paging area.
  • the radio access network element performs the paging according to the paging area.
  • FIG. 8 is a schematic diagram of a processing procedure of mobility management provided by an embodiment of the present application.
  • the terminal Before the paging process shown in Figure 8, the terminal establishes a PDU session with the DN network element through the UPF network element, and then the terminal transits to the idle state.
  • Step 801 After receiving the downlink data packet of the PDU session, the UPF network element sends a data notification message to the SMF network element, where the data notification message includes information such as a PDU session identifier of the PDU session.
  • Step 802 The SMF network element determines, according to the PDU session identifier, a UPF network element that establishes a connection for the PDU session corresponding to the PDU session identifier and an SSC mode corresponding to the PDU session identifier.
  • the SMF network element may start the first timer, and after determining that the AMF network element does not receive the paging response after the first timer expires, send the packet loss indication information to the UPF network element.
  • Step 803 The SMF network element sends a first message to the AMF network element.
  • the first message may include at least one of an SSC mode and a service area of the UPF network element.
  • the PDU session identifier may also be included in the first message.
  • the first message may also be referred to as an N11 message.
  • Step 804 The AMF network element determines the paging area according to at least one of an SSC mode and a service area of the UPF network element.
  • the AMF network element can also determine a paging policy.
  • Step 805 The AMF network element sends a second message to the network element of the radio access network, where the second message may include a paging area and a tracking area list.
  • the second message may further include a paging policy.
  • Step 806 The RAN network element sends a paging message to the terminal according to information such as a paging area and/or a paging policy, thereby paging the terminal.
  • the AMF network element determines the paging area according to at least one of the SSC mode and the service area of the UPF network element. And instructing the radio access network element to page the terminal according to the paging area.
  • the determined paging area is smaller than or equal to the area indicated by the tracking area list of the terminal corresponding to the PDU session, so that it is possible to determine whether the terminal can be paged faster, thereby improving the access efficiency of the terminal.
  • the SMF network element may further determine whether to trigger the establishment of the user plane transmission channel.
  • a terminal is switched to a connected state, including but not limited to: a paging and service request process triggered by receiving a downlink data packet by one of the PDU sessions of the terminal, or by a network side device, such as a PCF network element or a UPF network.
  • the signaling process triggered by the element is not limited to: a paging and service request process triggered by receiving a downlink data packet by one of the PDU sessions of the terminal, or by a network side device, such as a PCF network element or a UPF network.
  • FIG. 9 it is a schematic flowchart of a method for processing mobility management according to an embodiment of the present application.
  • the method includes:
  • Step 901 The SMF network element receives the data notification message that is sent by the UPF network element and includes the PDU session identifier.
  • the PDU session identifier is that the terminal establishes the identifier of the PDU session corresponding to the PDU session identifier by using the UPF network element.
  • Step 902 The SMF network element determines, according to the PDU session identifier, a service area of the UPF network element and an SSC mode of the PDU session.
  • Step 903 The SMF network element determines, according to the service area and the SSC mode of the PDU session, whether to trigger establishment of a user plane transmission channel.
  • the SMF network element determines that the SSC mode of the PDU session is SSC mode 2, and the terminal is located in the service area, triggering establishment of the user plane Transmission channel.
  • the SMF network element determines that the SSC mode of the PDU session is SSC mode 2, and the terminal is not located in the service area, the data notification message is ignored.
  • the SMF network element determines that the terminal is located in the service area, the user plane transmission channel is triggered to be established.
  • the SMF network element determines that the SSC mode of the PDU session is SSC mode 1 or SSC mode 3, and the terminal is not located in the service area, triggering establishment of the user Surface transmission channel.
  • the device may also send packet loss indication information to the UPF network element, where the packet loss indication information is used to indicate that the UPF network element discards the received Downlink data of the terminal.
  • FIG. 10 is a schematic flowchart diagram of a processing method for mobility management according to an embodiment of the present application. Before the flow shown in Figure 10, the terminal has been switched to the connected state.
  • Step 1001 After receiving the downlink data packet of the terminal, the UPF network element sends a data notification message to the SMF network element, where the data notification message includes information such as a PDU session identifier of the PDU session to which the downlink data packet belongs.
  • Step 1002 The SMF network element determines, according to the PDU session identifier, a UPF network element that is connected to the PDU session corresponding to the PDU session identifier, and an SSC mode corresponding to the PDU session identifier, and according to the service area of the UPF network element and the The SSC mode of the PDU session determines whether a user plane transmission channel is triggered to be established.
  • the SMF network element determines that the SSC mode of the PDU session is the SSC mode 2, and the terminal is located in the service area, the user plane transmission channel is triggered to be established, and step 1003 and step 1003 are performed. After the steps.
  • the SMF network element determines that the SSC mode of the PDU session is SSC mode 2, and the terminal is not located in the service area, the data notification message is ignored and skipped. After step 1003, steps 1004 and steps subsequent to step 1004 are performed. Optionally, the SMF network element may notify the UPF network element to discard the received downlink data packet of the terminal, and the subsequent steps are not performed.
  • the SMF network element determines that the terminal is located in the service area, the user plane transmission channel is triggered to be established, and steps subsequent to step 1003 and step 1003 are performed.
  • the SMF network element determines that the SSC mode of the PDU session is SSC mode 1 or SSC mode 3, and the terminal is not located in the service area, triggering establishment of the user The channel is transmitted, and steps 1003 and steps subsequent to step 1003 are performed.
  • Step 1003 The SMF network element sends a data notification confirmation message to the UPF network element.
  • the data notification confirmation message includes packet loss indication information.
  • Step 1004 The SMF network element sends an N11 message to the AMF network element, where the N11 message is used to trigger a data transmission channel between the RAN device and the UPF that establishes the PDU session for receiving the downlink data packet.
  • Step 1005 The AMF network element sends an N11 acknowledgement message to the SMF network element.
  • the embodiment of the present application further provides a method for generating a tracking area list.
  • a flow chart of a method for processing mobility management according to an embodiment of the present application includes:
  • Step 1101 The AMF network element receives the PDU session information sent by the SMF network element, where the PDU session information includes at least one of the following: an SSC mode of the first PDU session; and a service area of the UPF network element that establishes the PDU session;
  • Step 1102 The AMF network element determines an area indicated by the tracking area list according to the PDU session information.
  • the AMF network element can receive the PDU session information sent by the SMF network element in multiple cases. For example, after the terminal initiates the registration process of establishing the first PDU session, the SMF determines the PDU according to the established first PDU session. Session information, and the PDU session information is sent to the AMF network element.
  • step 1102 if the AMF network element determines that the SSC mode of the first PDU session is SSC mode 2, the service area is used as an area indicated by the tracking area list.
  • the area indicated by the determined tracking area list includes a first level area and a second level area, where the first level area is an area indicated by the tracking area list exclusive to the first PDU session, and the second level area The area indicated for the first PDU session and the tracking area list shared by the second PDU session.
  • the first level area may be a service area of the UPF corresponding to the first PDU session.
  • the AMF network element may further send the tracking area list to the terminal.
  • the terminal can then determine to trigger the tracking area update process based on the PDU session information.
  • the terminal if the terminal has the first PDU session in which the SSC mode is the SSC mode 2, the terminal triggers the tracking area update process when determining the area indicated by the tracking area list exclusive to the first PDU session. If the terminal only has the second PDU session in which the SSC mode is SSC mode 1 or SSC mode 3, the terminal does not trigger the tracking area update process when determining that the area indicated by the tracking area list exclusive to the first PDU session is left.
  • the location area update process is not initiated.
  • FIG. 12 is a schematic flowchart diagram of a method for processing mobility management according to an embodiment of the present application. The process shown in FIG. 12 is described by taking the registration process of establishing a PDU session as an example (for example, two PDU sessions are established in the registration process), but the embodiment of the present application is not limited to the process.
  • Steps 1 to 4 are the same as the prior art.
  • Step 1201 The terminal initiates a registration request message requesting to establish a PDU session.
  • Step 1202. The RAN network element selects an AMF network element for the terminal.
  • Step 1203. The RAN network element sends a registration request to the AMF network element.
  • Step 1204. The AMF network element selects an SMF network element for the terminal.
  • Step 1205. The AMF network element sends an SM request to the SMF network element, where the SM message includes the location information of the terminal and the service area restriction (Mobility Restriction area).
  • the service area restriction Mobility Restriction area
  • the service area restriction is an area that restricts the terminal communication service, in which the terminal cannot establish any signaling/data connection with the mobile communication network, and cannot respond to services initiated by the network.
  • Step 1206 The SMF network element selects a UDM network element.
  • Step 1207 The SMF network element requests the subscription data from the UDM network element, and the subscription data includes the subscription data related to the session.
  • the SMF network element further selects the UPF network element based on the service area restriction according to the location of the terminal.
  • Step 1209 to step 1210. Establish a PDU session to establish PDU session 1 and PDU session 2 as an example.
  • Step 1211 The SMF network element sends a PDU session establishment request acknowledgement message to the AMF network element, where the message includes PDU session information, where the PDU session information includes a PDU session SSC mode and/or a service area of the UPF.
  • Step 1212 The AMF network element generates a tracking area list based on the PDU session information, and the manner of generating the tracking area list may include but is not limited to:
  • the service area of the UPF network element corresponding to the PDU session may be used as the area indicated by the tracking area list;
  • the area indicated by the generated tracking area list may include the first level area and the second level area, and when generating the tracking area list, the SSC mode is used.
  • the service area of the UPF network element of the PDU session of 2 is the area indicated by the tracking area list of the PDU session.
  • Step 1213 The AMF network element sends a registration accept message to the terminal, where the message includes the tracking area list information.
  • Step 1214 The terminal sends a registration completion message to the AMF network element.
  • the location area updating process is not initiated when moving in the overlapping area, otherwise the terminal initiates the location area updating process.
  • the SMF network element may receive the service restriction area information that is sent by the AMF network element. Then, the SMF network element may select the terminal as the terminal according to the service restriction area information.
  • the UPF network element of the PDU session may be received.
  • the SMF network element may determine at least one UPF network element according to the location information of the terminal.
  • Each of the at least one UPF network element may be a UPF network element that covers a location indicated by the location information of the terminal.
  • the at least one UPF network element may also be determined according to other manners, and is not limited herein.
  • the SMF network element may determine, as the UPF network element that establishes the PDU session, the UPF network element that has the smallest overlap range between the service area indicated by the service area and the service restriction area information.
  • FIG. 13 it is a schematic diagram of a service restriction area provided by an embodiment of the present application.
  • the terminal 1304 is located in the coverage area of the service area 1301 of the UPF network element 1 and the service area 1302 of the UPF network element 2, so that one UPF network element in the UPF network element 1 and the UPF network element 2 can be used as the terminal. 1304.
  • the service restriction area 1303 of the terminal 1304 is located in the coverage area of the service area 1302 of the UPF network element 2, the UPF network element 1 can be determined as the UPF network element for establishing the PDU session for the terminal 1304.
  • the network side can implicitly feel the action track of the terminal 1304. For example, the terminal 1304 may not move to the area indicated by the UPF network element 2 because there is a service there. Since the area is restricted and the possibility of moving to the area of the UPF network element 1 is large, it is better to select the UPF network element 1 for the terminal 1304 than the UPF network element 2.
  • the terminal when the terminal establishes a PDU session with the DN network element through the first UPF network element, if the terminal moves outside the service area of the first UPF network element, if the network side is in the area range indicated by the tracking area list configured for the terminal.
  • the internal paging terminal after receiving the paging message, the terminal initiates a service request process, in which the data transmission channel of the terminal is restored, and the downlink data packet received by the first UPF network element can pass the The data transmission channel is sent to the terminal (including the buffered data packet).
  • the first UPF network element caches the application data packet.
  • the application on the DN network element side it is considered that the first UPF network element sends the data packet to the terminal, but when the terminal moves away from the first
  • the network side can reselect the UPF network element of the terminal service according to the principle of reselection of the UPF network element. Therefore, if the mobile network side reselects the second UPF network element for the terminal, the DN If the application on the NE side is not aware, the data packet will still be sent to the first UPF network element, so the data packet cannot be sent to the terminal, and the service cannot be performed normally.
  • the first UPF network element may re-allocate the IP address to the terminal, so the IP address of the terminal also changes. For the application, if the old IP address of the terminal is still used as the target of the data packet. If the address is reached, the data packet cannot be sent to the terminal normally.
  • the downlink data cannot be sent to the terminal, and the terminal cannot perceive the terminal.
  • the application of the downlink data packet that triggers the paging so it is also impossible to initiate contact with the application to implement data transmission.
  • the terminal initiates the service request process, which may not only occur when the terminal is paged.
  • the service request process is also initiated.
  • the network side device (SMF/AMF) may acquire the location information of the terminal according to the information of the PDU session of the current terminal, for example, if there is a PDU session of the SSC mode 2, and the location of the terminal is not in the session.
  • the network side may reselect the UPF device for the PDU session and notify the terminal to initiate a PDU session establishment process.
  • FIG. 14 a schematic diagram of a processing method of mobility management is provided in the embodiment of the present application.
  • the method includes:
  • Step 1401 The SMF network element acquires a PDU session identifier of the terminal and location information of the terminal.
  • Step 1402 If the SMF network element determines, according to the PDU session identifier and the location information of the terminal, that the UPF network element of the first PDU session corresponding to the PDU session identifier is reselected, the terminal is triggered by the AMF network element. Initiating a process of establishing a second PDU session.
  • the SMF network element may receive the PDU session identifier of the terminal and the location information of the terminal that are sent by the AMF network element.
  • the UPF network element of the first PDU session after receiving the downlink data packet of the terminal, the UPF network element of the first PDU session sends a data notification message to the SMF network element, and the SMF network element triggers the AMF network element to page the terminal, where the data notification message is sent.
  • a PDU session identifier of the first PDU session to which the downlink data packet belongs may be included.
  • the terminal may initiate a service request process by using the AMF network element to obtain the location information of the terminal, and then send the obtained PDU session identifier and location information to the SMF network element.
  • the data notification message sent by the UPF network element of the first PDU session to the SMF network element may further include application information.
  • the SMF network element may receive the data notification message including the application information sent by the UPF network element of the first PDU session; the application information may be the application identification information of the downlink data packet received by the UPF network element, or may be one or more Downlink packets received by the UPF network element.
  • the data notification message is sent after the UPF network element of the first PDU session receives the downlink data packet of the terminal.
  • the SMF network element may further send the application information to the AMF network element, where the application information is used to notify the terminal to trigger application information of the paging process.
  • the SMF network element may trigger the terminal to establish a second PDU session by:
  • the SMF network element first determines the PDU session state information indicating that the terminal initiates the process of establishing the second PDU session, and sends the PDU session state information to the terminal by using the AMF network element, thereby triggering the terminal to initiate the establishment of the second PDU session process.
  • the PDU session state information may be determined by the SMF network element. For example, the SMF network element determines that the UPF network element of the PDU session needs to be reselected, thereby determining that the PDU session state is unavailable (Not available), the identifier of the PDU session, and the PDU.
  • the session state information is sent to the AMF network element, so that the AMF network element obtains the state information of the PDU session and notifies the terminal.
  • the SMF network element may also determine the PDU session state information.
  • the SMF network element determines that the UPF network element of the PDU session has to be reselected, the SMF network element initiates the process of releasing the original PDU session, and the process of releasing the PDU session, AMF
  • the network element can be aware that, for example, the SMF network element notifies the AMF network element to initiate the release of the PDU session, thereby notifying the RAN network element to release the relevant data transmission channel.
  • the AMF network element can perceive the PDU of the PDU session identification identifier.
  • the session has been released, that is, the PDU session status information of the session is unavailable.
  • the PDU session state information determined by the SMF network element may also be considered, and the PDU session state information is notified to the AMF network element.
  • the network side can re-establish a new PDU session, that is, the second PDU session, so that the terminal can re-establish the connection with the application, so that the service can be performed normally, and the system is improved. Efficiency improves the user experience.
  • the network side may establish a second PDU session for the terminal to use the UPF network element of the first PDU session, and may also re-establish a second PDU session for the terminal to determine a UPF network element, which is not limited in this embodiment. .
  • FIG. 15 a schematic diagram of a PDU session establishment process is provided in this embodiment of the present application.
  • Step 1501 The UPF network element receives the downlink data packet.
  • Step 1502 The UPF network element sends a data notification message to the SMF network element, where the data notification message includes information such as a PDU session identifier.
  • the PDU session identifier corresponds to a first PDU session.
  • Step 1503 The SMF network element sends an N11 message to the AMF network element, where the N11 message includes a PDU session identifier, SM information, and the like.
  • Step 1504 AMF network element paging terminal.
  • Step 1505 After receiving the paging message by the terminal to which the downlink data packet belongs, the terminal sends a service request message to the AMF network element, thereby initiating a service request process, so as to establish a data transmission channel between the terminal and the UPF network element.
  • Step 1506 The AMF network element sends an N11 message to the SMF network element, where the N11 message includes information such as a PDU session identifier, and may also include location information of the terminal.
  • the SMF network element may determine to reselect the UPF network element for the PDU session of the terminal, for example, according to the location information of the terminal. In this case, the SMF network element determines the PDU session state information, such as the current PDU session is unavailable, and the specific form is not limited.
  • Step 1507 The SMF network element sends a message to the AMF network element, where the N11 message includes the data transmission channel information of the core network side, so as to establish a data transmission channel with the RAN network element side.
  • Step 1508 The AMF network element sends an N2 request message to the RAN network element, where the N2 request message includes the NAS layer service request acceptance information, where the information may include the PDU session state information, and the PDU session information may refer to the PDU session being unavailable.
  • the specific form is not limited.
  • the timer information may be included in the N2 request message.
  • Step 1509 The RAN network element sends a Radio Resource Control (RRC) connection reconfiguration process to the terminal.
  • RRC Radio Resource Control
  • the RAN network element side will receive the PDU session state information and/or timer in step 1508.
  • Information notification terminal The RAN network element sends a Radio Resource Control (RRC) connection reconfiguration process to the terminal.
  • RRC Radio Resource Control
  • Step 1510 The RAN network element requests an acknowledgement message to send N2.
  • Step 1511 The AMF network element sends an N11 message.
  • Step 1512a The SMF network element sends an N4 session update request to the UPF network element of the first PDU session.
  • Step 1512b The UPF network element of the first PDU session sends an N4 session update response to the SMF network element.
  • Steps 1510 to 1512b are the same as the prior art, and implement a data transmission channel for the UPF network element that restores the terminal and the first PDU session.
  • the downlink data packet received by the UPF is sent to the terminal device, so that the terminal device can perceive the information of the application that sends the downlink data, such as the application name or the application server information.
  • Step 1513 The SMF network element sends an N11 message confirmation message to the AMF network element. If the PDU session status information is not included in step 1508, the step may include PDU session information.
  • Step 1514 The AMF network element sends a NAS layer message to the terminal, where the NAS layer message includes PDU session state information.
  • the terminal may initiate a new PDU session creation process according to the indication of the session state information.
  • the specific form of the PDU session information is not limited, and the first PDU session may be unavailable, or the PDU session may be re-established.
  • the timer may be started according to the duration in the timer information to complete steps 1510 to 1513 in the above figure.
  • the network side may select a corresponding location according to the current location information of the terminal.
  • the UPF network element establishes a data transmission channel for the terminal and the data network.
  • the terminal determines the application information that communicates with the received downlink data packet, so that the terminal can establish a communication connection with the application of the application information by using the second PDU session.
  • FIG. 16 a schematic diagram of a PDU session establishment process is provided in this embodiment of the present application.
  • Step 1601 The UPF network element receives the downlink data packet.
  • Step 1602 The UPF network element sends a data notification message to the SMF network element, where the data notification message includes information such as a PDU session identifier.
  • the PDU session identifier corresponds to a first PDU session.
  • the data notification message may further include application information, and the specific form of the application information is not limited, and may be all or part of the cached data packet, or application identifier and the like.
  • Step 1603 The SMF network element sends an N11 message to the AMF network element, where the N11 message includes a PDU session identifier, SM information, and the like.
  • Step 1604 AMF network element paging terminal.
  • Step 1605 After receiving the paging message by the terminal to which the downlink data packet belongs, the terminal sends a service request message to the AMF network element, so as to initiate a service request process, so as to establish a data transmission channel between the terminal and the UPF network element.
  • Step 1606 The AMF network element sends an N11 message to the SMF network element, where the N11 message includes a PDU session identifier, and may also include location information of the terminal.
  • the SMF network element may determine that the first PDU session reselects the UPF, for example, according to the location information of the terminal. In this case, the SMF network element determines the PDU session state information, such as the current PDU session is unavailable, and the specific form is not limited.
  • Step 1607 The SMF network element sends an N11 message to the AMF network element, where the N11 message includes data transmission channel information on the core network side, so as to establish a data transmission channel with the RAN side.
  • Step 1608 The AMF network element sends an N2 request message to the RAN network element, where the message includes the NAS layer service request acceptance information, and the information may include the PDU session state information, and may also include information such as the application identifier.
  • Step 1609 The RAN network element sends an RRC connection reconfiguration process to the terminal.
  • the RAN network element side notifies the terminal of the PDU session state information.
  • the RAN network element may further notify the terminal of the application identifier information.
  • Step 1610 After receiving the session state information, the terminal may initiate a new PDU session creation process according to the indication of the session state information.
  • the specific form of the PDU session state information is not limited, and the PDU session may be unavailable or the PDU session may be re-established. Wait.
  • the network side re-selects a UPF network element different from the UPF network element of the first PDU session to establish a second PDU session.
  • the terminal is configured according to the second PDU session.
  • the received application information is connected with the application indicated by the application information, so that the service can be performed normally, and the user experience is improved.
  • the embodiment of the present application further provides a processing device for mobility management.
  • the embodiment of the present application provides a processing structure diagram of mobility management.
  • the apparatus can perform steps 401 to 403 in the flow shown in FIG. 4, and contents related to steps 401 to 403.
  • the apparatus 1700 includes:
  • the transceiver unit 1701 is configured to receive a data notification message that includes a protocol data unit PDU session identifier sent by the user plane function UPF network element, and determine a session and service continuity SSC mode corresponding to the PDU session identifier according to the PDU session identifier. And a service area of the user plane function UPF network element, where the UPF network element is a network element that establishes a PDU session corresponding to the PDU session identifier;
  • the processing unit 1702 is configured to determine, according to the SSC mode and/or a service area of the UPF network element, a paging area;
  • the transceiver unit is configured to send a first message including the paging area to an access and mobility management function AMF network element, where the first message is used to trigger the AMF network element to be in the paging area. Paging a terminal that establishes the PDU session through the UPF network element.
  • processing unit 1702 is specifically configured to:
  • the service area is used as a paging area
  • the area indicated by the tracking area list is used as a paging area;
  • the paging area is determined according to the tracking area list and the service area of the UPF network element.
  • processing unit 1702 is specifically configured to:
  • An area in which the service area overlaps with an area indicated by the tracking area list is determined as the paging area.
  • the first message further includes a paging policy
  • the paging policy includes one or more of the following:
  • Number of pagings the number of pagings indicating that the AMF network element pages the number of terminals
  • a paging period indicates a period during which the AMF network element pages the terminal
  • the paging indication information indicating a manner in which the AMF network element pages the terminal.
  • processing unit 1702 is further configured to:
  • the processing unit sends the packet loss indication information to the UPF network element, where the packet loss indication information is used by the processing unit. And instructing the UPF network element to discard downlink data received by the terminal.
  • the embodiment of the present application provides a processing structure diagram of mobility management.
  • the apparatus can perform steps 404 to 405 in the flow shown in FIG. 4, and contents related to steps 404 to 405.
  • the apparatus 1800 includes:
  • the transceiver unit 1801 is configured to receive a first message that includes a paging area that is sent by the session management function SMF network element, where the paging area is the SMF network element according to the session and service continuity SSC mode and/or the user plane function UPF Determining, by the service area of the network element, the service area of the SSC mode and/or the UPF network element is determined by the SMF network element according to the acquired protocol data unit PDU session identifier, where the UPF network element is used to establish the PDU The network element of the PDU session corresponding to the session identifier;
  • the processing unit 1802 is configured to, by using the transceiver unit, page the terminal that establishes the PDU session corresponding to the PDU session identifier by using the UPF network element in the paging area.
  • the transceiver unit 1801 is specifically configured to:
  • the paging area in the second message is used by the radio access network element to determine that the radio access network element pages the paging area of the terminal.
  • the first message further includes a paging policy
  • the paging policy includes one or more of the following:
  • Number of pagings the number of pagings being used to indicate the number of times the terminal is paged
  • the homing period is used to indicate a period of paging the terminal
  • the paging indication information is used to indicate a manner of paging the terminal.
  • the embodiment of the present application provides a processing structure diagram of mobility management.
  • the apparatus can perform steps 701 to 702 in the flow shown in FIG. 7, and contents related to 701 to step 702.
  • the apparatus 1900 includes:
  • the transceiver unit 1901 is configured to receive a data notification message that is sent by the user plane function UPF network element and includes a protocol data unit PDU session identifier.
  • the processing unit 1902 is configured to determine, according to the PDU session identifier, at least one of a session and a service continuity SSC mode corresponding to the PDU session identifier and a service area of the UPF network element, where the UPF network element is a setup a network element of the PDU session corresponding to the PDU session identifier;
  • the transceiver unit 1901 is configured to send, by the access and mobility management function, the AMF network element, the first message, where the first message includes at least one of the SSC mode and the service area, the first message A terminal for triggering the AMF network element paging to establish the PDU session by using the UPF network element.
  • processing unit 1902 is further configured to:
  • the received downlink packet of the terminal is discarded.
  • the embodiment of the present application provides a processing structure diagram of mobility management.
  • the apparatus can perform steps 703 to 704 in the flow shown in FIG. 7, and contents related to 703 to step 704.
  • the apparatus 2000 includes:
  • the transceiver unit 2001 is configured to receive a first message sent by the session management function SMF network element, where the first message includes at least one of a session and a service continuity SSC mode and a service area of the user plane function UPF network element.
  • the SSC mode and the service area are determined by the SMF network element according to the acquired protocol data unit PDU session identifier, where the service area is a user plane function UPF network element that establishes a PDU session corresponding to the PDU session identifier.
  • Service Area
  • the processing unit 2002 is configured to determine a paging area according to the SSC mode and at least one of the service areas, and page the terminal that establishes the PDU session by using the UPF network element in the paging area.
  • processing unit 2002 is specifically configured to:
  • the SSC mode is the SSC mode 1, determining an area indicated by the tracking area list as the paging area; or
  • the SSC mode is the SSC mode 2 or the SSC mode 3
  • determining the service area as the paging area or determining the overlapping coverage area of the service area and the tracking area list as the paging area .
  • the transceiver unit 2001 is specifically configured to:
  • the second message further includes a paging policy
  • the paging policy includes one or more of the following:
  • Number of pagings the number of paging times is used to indicate the number of times the radio access network network element pages the terminal;
  • a paging period where the homing period is used to indicate a period in which the radio access network element pages the terminal;
  • the paging indication information is used to indicate a manner in which the radio access network network element pages the terminal.
  • the embodiment of the present application provides a processing structure diagram of mobility management.
  • the apparatus can perform steps 401 to 403 in the flow shown in FIG. 4, and contents related to steps 401 to 403.
  • the apparatus 2100 includes:
  • the transceiver 2101 is configured to receive a data notification message that includes a protocol data unit PDU session identifier sent by the user plane function UPF network element, and determine a session and service continuity SSC mode corresponding to the PDU session identifier according to the PDU session identifier. And a service area of the user plane function UPF network element, where the UPF network element is a network element that establishes a PDU session corresponding to the PDU session identifier;
  • the processor 2102 is configured to determine a paging area according to the SSC mode and/or a service area of the UPF network element.
  • the transceiver is configured to send a first message including the paging area to an access and mobility management function AMF network element, where the first message is used to trigger the AMF network element to be in the paging area Paging a terminal that establishes the PDU session through the UPF network element.
  • the device may also include a power source 2103 (such as a battery) for powering various components.
  • a power source 2103 such as a battery
  • the power source 2103 may be logically coupled to the processor 2102 through a power management system to manage charge, discharge, and power management through the power management system. And other functions.
  • the apparatus can also include a memory 2104 that can be used to store software programs and modules, and a processor 2102 that executes various functional applications and data processing of the apparatus by running software programs and modules stored in the memory 2104.
  • the processor 2102 is specifically configured to:
  • the service area is used as a paging area
  • the area indicated by the tracking area list is used as a paging area;
  • the paging area is determined according to the tracking area list and the service area of the UPF network element.
  • the processor 2102 is specifically configured to:
  • An area in which the service area overlaps with an area indicated by the tracking area list is determined as the paging area.
  • the first message further includes a paging policy
  • the paging policy includes one or more of the following:
  • Number of pagings the number of pagings indicating that the AMF network element pages the number of terminals
  • a paging period indicates a period during which the AMF network element pages the terminal
  • the paging indication information indicating a manner in which the AMF network element pages the terminal.
  • processor 2102 is further configured to:
  • the processor sends the packet loss indication information to the UPF network element, where the packet loss indication information is used by the processor. And instructing the UPF network element to discard downlink data received by the terminal.
  • the embodiment of the present application provides a processing structure diagram of mobility management.
  • the apparatus can perform steps 404 to 405 in the flow shown in FIG. 4, and contents related to steps 404 to 405.
  • the apparatus 2200 includes:
  • the transceiver 2201 is configured to receive a first message, including a paging area, sent by the session management function SMF network element, where the paging area is the SMF network element according to the session and service continuity SSC mode and/or the user plane function UPF Determining, by the service area of the network element, the service area of the SSC mode and/or the UPF network element is determined by the SMF network element according to the acquired protocol data unit PDU session identifier, where the UPF network element is used to establish the PDU The network element of the PDU session corresponding to the session identifier;
  • the processor 2202 is configured to, by using the transceiver, page, in the paging area, a terminal that establishes a PDU session corresponding to the PDU session identifier by using the UPF network element.
  • the device may also include a power source 2203 (such as a battery) for powering various components.
  • a power source 2203 such as a battery
  • the power source 2203 may be logically coupled to the processor 2202 through a power management system to manage charging, discharging, and power management through the power management system. And other functions.
  • the apparatus can also include a memory 2204 that can be used to store software programs and modules, and a processor 2202 that executes various functional applications and data processing of the apparatus by running software programs and modules stored in the memory 2204.
  • the transceiver 2201 is specifically configured to:
  • the paging area in the second message is used by the radio access network element to determine that the radio access network element pages the paging area of the terminal.
  • the first message further includes a paging policy
  • the paging policy includes one or more of the following:
  • Number of pagings the number of pagings being used to indicate the number of times the terminal is paged
  • the homing period is used to indicate a period of paging the terminal
  • the paging indication information is used to indicate a manner of paging the terminal.
  • the embodiment of the present application provides a processing structure diagram of mobility management.
  • the apparatus can perform steps 701 to 702 in the flow shown in FIG. 7, and contents related to 701 to step 702.
  • the device 2300 includes:
  • the transceiver 2301 is configured to receive a data notification message that is sent by the user plane function UPF network element and includes a protocol data unit PDU session identifier.
  • the processor 2302 is configured to determine, according to the PDU session identifier, at least one of a session and a service continuity SSC mode corresponding to the PDU session identifier and a service area of the UPF network element, where the UPF network element is a setup a network element of the PDU session corresponding to the PDU session identifier;
  • the transceiver 2301 is configured to send, by the access and mobility management function, the AMF network element, the first message, where the first message includes at least one of the SSC mode and the service area, the first message A terminal for triggering the AMF network element paging to establish the PDU session by using the UPF network element.
  • the device may also include a power source 2303 (such as a battery) for powering various components.
  • a power source 2303 such as a battery
  • the power source 2303 may be logically coupled to the processor 2302 through a power management system to manage charging, discharging, and power management through the power management system. And other functions.
  • the apparatus can also include a memory 2304 that can be used to store software programs and modules, and a processor 2302 that executes various functional applications and data processing of the apparatus by running software programs and modules stored in the memory 2304.
  • processor 2302 is further configured to:
  • the received downlink packet of the terminal is discarded.
  • the embodiment of the present application provides a processing structure diagram of mobility management.
  • the device can be executed Steps 703 to 704 in the flow shown in FIG. 7 and contents related to 703 to step 704 are performed.
  • the apparatus 2400 includes:
  • the transceiver 2401 is configured to receive a first message sent by the session management function SMF network element, where the first message includes at least one of a session and a service continuity SSC mode and a service area of a user plane function UPF network element.
  • the SSC mode and the service area are determined by the SMF network element according to the acquired protocol data unit PDU session identifier, where the service area is a user plane function UPF network element that establishes a PDU session corresponding to the PDU session identifier.
  • Service Area
  • the processor 2402 is configured to determine a paging area according to the SSC mode and at least one of the service areas, and page the terminal that establishes the PDU session by using the UPF network element in the paging area.
  • the device may also include a power source 2403 (such as a battery) for powering various components.
  • a power source 2403 such as a battery
  • the power source 2403 may be logically coupled to the processor 2402 through a power management system to manage charging, discharging, and power management through the power management system. And other functions.
  • the apparatus can also include a memory 2404 that can be used to store software programs and modules, and a processor 2402 that executes various functional applications and data processing of the apparatus by running software programs and modules stored in the memory 2404.
  • processor 2402 is specifically configured to:
  • the SSC mode is the SSC mode 1, determining an area indicated by the tracking area list as the paging area; or
  • the SSC mode is the SSC mode 2 or the SSC mode 3
  • determining the service area as the paging area or determining the overlapping coverage area of the service area and the tracking area list as the paging area .
  • the transceiver 2401 is specifically configured to:
  • the second message further includes a paging policy
  • the paging policy includes one or more of the following:
  • Number of pagings the number of paging times is used to indicate the number of times the radio access network network element pages the terminal;
  • a paging period where the homing period is used to indicate a period in which the radio access network element pages the terminal;
  • the paging indication information is used to indicate a manner in which the radio access network network element pages the terminal.
  • the embodiment of the present application further provides a computer readable storage medium for storing computer software instructions required to execute the foregoing processor, which includes a program for executing the above-mentioned processor.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

一种移动性管理的处理方法及装置，其中方法包括：SMF网元接收UPF网元发送的包括PDU会话标识的数据通知消息，并根据所述PDU会话标识确定所述PDU会话标识对应的会话与业务连续性SSC模式和/或用户面功能UPF网元的服务区域，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；所述SMF网元根据所述SSC模式和/或UPF网元的服务区域确定寻呼区域；所述SMF网元向接入与移动性管理功能AMF网元发送包括所述寻呼区域的第一消息，所述第一消息用于触发所述AMF网元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端。

Description

一种移动性管理的处理方法及装置 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的处理方法及装置。
背景技术
在下一代无线通信系统中，例如：在新无线(New Radio，NR)系统中，终端通过用户面功能(User Plane Function，UPF)网元与数据网络(Data Network，DN)网元建立协议数据单元(Protocol Data Unit，PDU)会话，PDU会话提供终端与DN网元之间的PDU连接服务。
PDU会话有三种会话与业务连续性(Session and Service Continuity，SSC)模式(Mode)，分别为：SSC模式1、SSC模式2以及SSC模式3。
SSC模式1：在该模式下，终端建立PDU会话之后，无论终端移动到任何区域或者任何接入技术下，该PDU会话的UPF网元均作为锚点，为该终端服务，即该PDU会话不会由于终端的移动发生任何形式的中断。
SSC模式2：在该模式下，终端建立PDU会话之后，当终端移动时，如果终端离开了UPF网元的服务区域，网络可以为终端的该PDU会话重选UPF网元，触发原UPF网元服务的PDU会话，并使终端建立重选UPF网元后的PDU会话。在这种模式下，UPF网元可以认为是有特定服务区域的，当终端在该服务区域移动时，该UPF网元为终端服务，而如果终端离开了这个服务区域，则网络侧可以确定该UPF网元则不能为终端服务，原通过该UPF网元建立的PDU会话将会发生中断。
SSC模式3:在该模式下，终端建立PDU会话之后，UPF网元的服务区域也是有范围的，当终端离开了UPF网元的服务区域后，网络为终端选择新的UPF网元为该终端服务，终端通过该新的UPF网元与原DN网元建立PDU会话，但是与上述SSC模式2不同的是，终端通过旧的UPF网元建立的PDU会话可以暂时不释放连接，而是在新的PDU会话建立完成后再释放。
当终端建立PDU会话之后，终端处于空闲态时，UPF网元收到该终端的下行数据包或者UPF网元等核心网设备触发控制信令过程时，网络侧须先在跟踪区列表(Tracking Area List，TA List)范围内寻呼终端。寻呼是PDU会话粒度的，即根据下行数据包或者控制信令所属的PDU会话寻呼终端，使终端针对该PDU会话与网络侧建立连接。但是在某些模式下，例如SSC模式2模式，终端可能已经不位于UPF网元的服务区域范围内，根据SSC模式2的特点，如果终端不在UPF网元的服务区域范围内，该PDU会话的UPF网元可能重选，从而导致该PDU会话释放。因此，在这种情况下，在TA list的范围内寻呼终端并不能精准寻呼，降低了寻呼的效率。
发明内容
本申请提供一种移动性管理的处理方法及装置，用以解决如何有效的对终端进行移动性管理，使得终端能够快速接入网络的问题。
本申请实施例提供一种移动性管理的处理方法，该方法包括：
会话管理功能SMF网元接收用户面功能UPF网元发送的包括协议数据单元PDU会话 标识的数据通知消息，并根据所述PDU会话标识确定所述PDU会话标识对应的会话与业务连续性SSC模式和/或用户面功能UPF网元的服务区域，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；
所述SMF网元根据所述SSC模式和/或UPF网元的服务区域确定寻呼区域；
所述SMF网元向接入与移动性管理功能AMF网元发送包括所述寻呼区域的第一消息，所述第一消息用于触发所述AMF网元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端。
根据本申请实施例提供的方法，SMF网元接收到UPF网元发送的PDU会话标识之后，可以根据所述PDU会话标识确定所述PDU会话标识对应的SSC模式和/或UPF网元的服务区域，从而确定寻呼终端的寻呼区域，并指示AMF网元根据所述寻呼区域寻呼终端。由于确定出的寻呼区域小于或等于所述PDU会话对应的终端的跟踪区列表指示的区域，从而可以更快的确定是否可以寻呼到终端，从而提高终端的接入效率。
可选的，所述SMF网元根据所述SSC模式和/或UPF网元的服务区域确定寻呼区域，包括：
所述SMF网元若确定所述SSC模式为SSC模式2，则将所述服务区域作为寻呼区域；或者
所述SMF网元若确定所述SSC模式为SSC模式1或者SSC模式3，则将跟踪区列表指示的区域作为寻呼区域；或者
所述SMF网元根据所述跟踪区列表与UPF网元的服务区域确定寻呼区域。
可选的，所述SMF网元根据跟踪区列表与UPF网元的服务区域确定寻呼区域，包括：
所述SMF网元将所述服务区域与所述跟踪区列表指示的区域重叠的区域确定为所述寻呼区域。
可选的，所述第一消息中还包括寻呼策略；
所述寻呼策略包括以下一项或多项：
寻呼次数，所述寻呼次数指示出所述AMF网元寻呼所述终端次数；
寻呼周期，所述寻周期指示出所述AMF网元寻呼所述终端的周期；
寻呼指示信息，所述寻呼指示信息指示所述AMF网元寻呼所述终端的方式。
可选的，所述寻呼指示信息指示AMF网元若在所述寻呼区域中未收到寻呼响应，则在跟踪区列表指示的区域中寻呼所述终端。
可选的，所述方法还包括：
所述SMF网元启动第一定时器；
所述SMF网元若在所述第一定时器定时超时之后，确定所述AMF网元未收到寻呼响应，则向所述UPF网元发送丢包指示信息，所述丢包指示信息用于指示所述UPF网元丢弃接收到所述终端的下行数据。
上述方法中，SMF网元在第一定时器定时超时之后确定AMF网元接收不到终端的寻呼响应，则指示UPF网元丢弃接收到所述终端的下行数据包。尤其是对于SSC模式2的PDU会话，由于如果终端离开了UPF网元的服务区域，由于该PDU会话的UPF网元需要重新选择，则终端设备的IP地址可能需要变化，从而可能会导致PDU会话会被中断，那么，这些数据包有可能是不能够再被发送到终端，所以可以丢弃数据包，从而可以节省UPF 网元的网络资源，提高系统运行效率。
基于相同的发明构思，本申请实施例提供一种移动性管理的处理装置，可以实现上述任一方法提供的多个移动性管理的处理方法实施例中的任一个。
在一种可能的设计中，该装置包括多个功能模块，例如包括处理单元以及收发单元，用于实现上述提供的移动性管理的处理方法。
在一种可能的设计中，该装置的结构中包括处理器和收发机，所述处理器被配置为支持该装置执行上述移动性管理的处理方法中相应的功能。所述收发机用于支持该装置与其他装置之间的通信，向其他装置接收或发送上述移动性管理的处理方法中所涉及的消息或者指令。该装置中还可以包括存储器，所述存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。
本申请实施例提供一种移动性管理的处理方法，所述方法包括：
移动性管理功能AMF网元接收会话管理功能SMF网元发送的包括寻呼区域的第一消息，所述寻呼区域为所述SMF网元根据会话与业务连续性SSC模式和/或用户面功能UPF网元的服务区域确定的，所述SSC模式和/或UPF网元的服务区域为所述SMF网元根据获取到的协议数据单元PDU会话标识确定的，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；
所述AMF网元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话标识对应的PDU会话的终端。
根据本申请实施例提供的方法，AMF网元接收到SMF网元发送的寻呼区域之后，可以根据所述寻呼区域寻呼终端。由于所述寻呼区域是SMF网元终端的PDU会话标识对应的SSC模式和/或UPF网元的服务区域确定的，小于或等于所述PDU会话对应的终端的跟踪区列表指示的区域，从而可以更快的确定是否可以寻呼到终端，从而提高终端的接入效率。
可选的，所述AMF网元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话标识对应的PDU会话的终端，包括：
所述AMF网元向无线接入网网元发送第二消息，所述第二消息中包括寻呼区域，所述第二消息用于触发所述无线接入网网元根据所述寻呼区域寻呼所述终端。
可选的，所述第二消息中的寻呼区域用于所述无线接入网网元确定所述无线接入网网元寻呼所述终端的寻呼区域。
可选的，所述第一消息中还包括寻呼策略；
所述寻呼策略包括以下一项或多项：
寻呼次数，所述寻呼次数用于指示寻呼所述终端的次数；
寻呼周期，所述寻周期用于指示寻呼所述终端的周期；
寻呼指示信息，所述寻呼指示信息用于指示寻呼所述终端的方式。
可选的，所述寻呼指示信息指示AMF网元若在所述寻呼区域中未收到寻呼响应，则在跟踪区列表指示的区域中寻呼所述终端。
本申请实施例提供一种移动性管理的处理方法，所述方法包括：
会话管理功能SMF网元接收用户面功能UPF网元发送的包括协议数据单元PDU会话标识的数据通知消息，并根据所述PDU会话标识确定所述PDU会话标识对应的会话与业务连续性SSC模式以及所述UPF网元的服务区域中的至少一项，所述UPF网元为建立所 述PDU会话标识对应的PDU会话的网元；
所述SMF网元向接入与移动性管理功能AMF网元发送第一消息，所述第一消息中包括所述SSC模式以及所述服务区域中的至少一项，所述第一消息用于触发所述AMF网元寻呼通过所述UPF网元建立所述PDU会话的终端。
可选的，所述方法还包括：
所述SMF网元启动第一定时器；
所述SMF网元若在所述第一定时器定时超时之后，确定未收到寻呼响应，则将接收到的所述终端的下行数据包丢弃。
基于相同的发明构思，本申请实施例提供一种移动性管理的处理装置，可以实现上述任一方法提供的多个移动性管理的处理方法实施例中的任一个。
在一种可能的设计中，该装置包括多个功能模块，例如包括处理单元以及收发单元，用于实现上述提供的移动性管理的处理方法。
在一种可能的设计中，该装置的结构中包括处理器和收发机，所述处理器被配置为支持该装置执行上述移动性管理的处理方法中相应的功能。所述收发机用于支持该装置与其他装置之间的通信，向其他装置接收或发送上述移动性管理的处理方法中所涉及的消息或者指令。该装置中还可以包括存储器，所述存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。
本申请实施例提供一种移动性管理的处理方法，所述方法包括：
移动性管理功能AMF网元接收会话管理功能SMF网元发送的第一消息，所述第一消息中包括会话与业务连续性SSC模式以及用户面功能UPF网元的服务区域中的至少一项，所述SSC模式以及所述服务区域为所述SMF网元根据获取到的协议数据单元PDU会话标识确定的，所述服务区域为建立所述PDU会话标识对应的PDU会话的用户面功能UPF网元的服务区域；
所述AMF网元根据所述SSC模式以及所述服务区域中的至少一项确定寻呼区域，并在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端。
可选的，所述AMF网元根据所述SSC模式以及所述服务区域中的至少一项确定寻呼区域，包括：
所述AMF网元若确定所述SSC模式为SSC模式1，则将跟踪区列表指示的区域确定为所述寻呼区域；或者
所述AMF网元若确定所述SSC模式为SSC模式2或SSC模式3，则将所述服务区域确定为所述寻呼区域，或者将所述服务区域与跟踪区列表的重叠覆盖区域确定为所述寻呼区域。
可选的，所述AMF网元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端，包括：
所述AMF网元向无线接入网网元发送第二消息，所述第二消息中包括寻呼区域，所述第二消息用于触发所述无线接入网网元根据所述寻呼区域寻呼所述终端。
可选的，所述第二消息中还包括寻呼策略；
所述寻呼策略包括以下一项或多项：
寻呼次数，所述寻呼次数用于指示所述无线接入网网元寻呼终端的次数；
寻呼周期，所述寻周期用于指示所述无线接入网网元寻呼所述终端的周期；
寻呼指示信息，所述寻呼指示信息用于指示所述无线接入网网元寻呼终端的方式。
可选的，所述寻呼指示信息指示所述无线接入网网元若在所述寻呼区域中未收到寻呼响应，则在跟踪区列表指示的区域中寻呼所述终端。
基于相同的发明构思，本申请实施例提供一种移动性管理的处理装置，可以实现上述任一方法提供的多个移动性管理的处理方法实施例中的任一个。
在一种可能的设计中，该装置包括多个功能模块，例如包括处理单元以及收发单元，用于实现上述提供的移动性管理的处理方法。
在一种可能的设计中，该装置的结构中包括处理器和收发机，所述处理器被配置为支持该装置执行上述移动性管理的处理方法中相应的功能。所述收发机用于支持该装置与其他装置之间的通信，向其他装置接收或发送上述移动性管理的处理方法中所涉及的消息或者指令。该装置中还可以包括存储器，所述存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。
本申请实施例提供了一种移动性管理的处理方法，所述方法包括：
会话管理功能SMF网元接收用户面功能UPF网元发送的包括协议数据单元PDU会话标识的数据通知消息；所述PDU会话标识为终端通过所述UPF网元建立所述PDU会话标识对应的PDU会话的标识；
所述SMF网元根据所述PDU会话标识确定所述UPF网元的服务区域以及所述PDU会话的会话与业务连续性SSC模式；
所述SMF网元根据所述服务区域以及所述PDU会话的SSC模式确定是否触发建立用户面传输通道。
可选的，所述SMF网元根据所述服务区域以及所述PDU会话的SSC模式确定是否触发建立用户面传输通道，包括：
所述SMF网元若确定所述PDU会话的SSC模式为SSC模式2，且所述终端位于所述服务区域中，则触发建立所述用户面传输通道；或者
所述SMF网元若确定所述PDU会话的SSC模式为SSC模式2，且所述终端不位于所述服务区域中，则忽略所述数据通知消息。
可选的，所述SMF网元忽略所述数据通知消息之后，还包括：
所述SMF向所述UPF网元发送丢包指示信息，所述丢包指示信息用于指示所述UPF网元丢弃接收到所述终端的下行数据。
基于相同的发明构思，本申请实施例提供一种移动性管理的处理装置，可以实现上述任一方法提供的多个移动性管理的处理方法实施例中的任一个。
在一种可能的设计中，该装置包括多个功能模块，例如包括处理单元以及收发单元，用于实现上述提供的移动性管理的处理方法。
在一种可能的设计中，该装置的结构中包括处理器和收发机，所述处理器被配置为支持该装置执行上述移动性管理的处理方法中相应的功能。所述收发机用于支持该装置与其他装置之间的通信，向其他装置接收或发送上述移动性管理的处理方法中所涉及的消息或者指令。该装置中还可以包括存储器，所述存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。
本申请实施例提供一种移动性管理的处理方法，所述方法包括：
移动性管理功能AMF网元接收会话管理功能SMF网元发送的协议数据单元PDU会 话信息，所述PDU会话信息包括以下至少一项：第一PDU会话的SSC模式；建立所述第一PDU会话的用户面功能UPF网元的服务区域；
所述AMF网元根据所述PDU会话信息确定跟踪区列表指示的区域。
可选的，AMF网元根据所述PDU会话信息确定跟踪区列表指示的区域之后，还包括：
所述AMF网元向终端发送所述跟踪区列表。
基于相同的发明构思，本申请实施例提供一种移动性管理的处理装置，可以实现上述任一方法提供的多个移动性管理的处理方法实施例中的任一个。
在一种可能的设计中，该装置包括多个功能模块，例如包括处理单元以及收发单元，用于实现上述提供的移动性管理的处理方法。
在一种可能的设计中，该装置的结构中包括处理器和收发机，所述处理器被配置为支持该装置执行上述移动性管理的处理方法中相应的功能。所述收发机用于支持该装置与其他装置之间的通信，向其他装置接收或发送上述移动性管理的处理方法中所涉及的消息或者指令。该装置中还可以包括存储器，所述存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。
本申请实施例提供一种移动性管理的处理方法，所述方法包括：
会话管理功能SMF网元获取终端的协议数据单元PDU会话标识以及所述终端的位置信息；
所述SMF网元若根据所述PDU会话标识以及所述终端的位置信息确定重选所述PDU会话标识对应的第一PDU会话的UPF网元，则通过移动性管理功能AMF网元触发所述终端发起建立第二PDU会话过程。
可选的，所述SMF网元通过移动性管理功能AMF网元触发所述终端建立第二PDU会话，包括：
所述SMF网元确定PDU会话状态信息，并通过所述AMF网元向终端发送所述PDU会话状态信息，所述PDU会话状态信息指示所述终端发起建立第二PDU会话过程。
可选的，所述方法还包括：
所述SMF网元接收第一PDU会话的UPF网元发送的包括应用信息的数据通知消息；所述数据通知消息为所述第一PDU会话的UPF网元接收到所述终端的下行数据包之后发送的。
可选的，所述方法还包括：
所述SMF网元向所述AMF网元发送所述应用信息，所述应用信息用于通知终端触发寻呼过程的应用信息。
基于相同的发明构思，本申请实施例提供一种移动性管理的处理装置，可以实现上述任一方法提供的多个移动性管理的处理方法实施例中的任一个。
在一种可能的设计中，该装置包括多个功能模块，例如包括处理单元以及收发单元，用于实现上述提供的移动性管理的处理方法。
在一种可能的设计中，该装置的结构中包括处理器和收发机，所述处理器被配置为支持该装置执行上述移动性管理的处理方法中相应的功能。所述收发机用于支持该装置与其他装置之间的通信，向其他装置接收或发送上述移动性管理的处理方法中所涉及的消息或者指令。该装置中还可以包括存储器，所述存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。
本申请实施例提供一种移动性管理的处理方法，所述方法包括：
会话管理功能SMF网元接收移动性管理功能AMF网元发送的业务限制区域信息；
所述SMF根据业务限制区域信息为终端选择用户面功能UPF网元，所述UPF网元用于用来为所述终端建立PDU会话。
本申请实施例还提供了一种移动性管理的处理装置，该装置包括处理器和存储器，所述存储器用于存储软件程序，所述处理器用于读取所述存储器中存储的软件程序并实现上述任意一种设计提供的移动性管理的处理方法。该装置可以是移动终端、计算机等等。
本申请实施例中还提供一种计算机存储介质，该存储介质中存储软件程序，该软件程序在被一个或多个处理器读取并执行时可实现上述任意一种设计提供的移动性管理的处理方法。
本申请实施例还提供了一种通信系统，该系统包括上述任意一种设计提供的移动性管理的处理装置，可选的，该系统还可以包括本申请实施例提供的方案中与所述移动性管理的处理装置进行交互的其他设备。
本申请实施例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各方面所述的方法。
附图说明
图1为第一种可能的5G网络架构示意图；
图2为第二种可能的5G网络架构示意图；
图3为第三种可能的5G网络架构示意图；
图4本申请实施例提供的一种移动性管理的处理方法流程示意图；
图5为本申请实施例提供的一种跟踪区更新过程示意图；
图6为本申请实施例提供的一种移动性管理的处理过程示意图；
图7为本申请实施例提供的一种移动性管理的处理方法流程示意图；
图8为本申请实施例提供的一种移动性管理的处理过程示意图；
图9为本申请实施例提供的一种移动性管理的处理方法流程示意图；
图10为本申请实施例提供的一种移动性管理的处理方法流程示意图；
图11为本申请实施例提供的一种移动性管理的处理方法流程示意图；
图12为本申请实施例提供的一种移动性管理的处理方法流程示意图；
图13为本申请实施例提供的一种业务限制区域示意图；
图14为本申请实施例提供的一种移动性管理的处理方法流程示意图；
图15为本申请实施例提供一种PDU会话建立流程示意图；
图16为本申请实施例提供一种PDU会话建立流程示意图；
图17为本申请实施例提供的一种移动性管理的处理装置结构示意图；
图18为本申请实施例提供的一种移动性管理的处理装置结构示意图；
图19为本申请实施例提供的一种移动性管理的处理装置结构示意图；
图20为本申请实施例提供的一种移动性管理的处理装置结构示意图；
图21为本申请实施例提供的一种移动性管理的处理装置结构示意图；
图22为本申请实施例提供的一种移动性管理的处理装置结构示意图；
图23为本申请实施例提供的一种移动性管理的处理装置结构示意图；
图24为本申请实施例提供的一种移动性管理的处理装置结构示意图。
具体实施方式
下面将结合附图对本申请实施例作进一步地详细描述。
本申请实施例可以应用于各种移动通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、先进的长期演进(Advanced long term evolution，LTE-A)系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、演进的长期演进(evolved Long Term Evolution，eLTE)系统、5G(例如NR系统)等其它移动通信系统。
在正在讨论的5G网络架构中，有多种可能的架构。如图1至图3所示，分别为第一种至第三种可能的5G网络架构示意图。在图1所示的网络架构中，RAN网元与DN网元之间包含1个UPF网元；在图2所示的网络架构中，RAN网元与DN网元之间包含2个并接在一起的UPF网元；在图1所示的网络架构中，RAN网元与DN网元之间包含串接在一起的2个UPF网元。
图1至图3所示的系统中包括鉴权服务器功能(Authentication Server Function，AUSF)网元、统一数据库管理功能(Unified Data Management，UDM)、接入与移动性管理功能(Access and Mobility Management Function，AMF)网元、会话管理功能(Session Management Function，SMF)网元、策略控制功能(Policy Control function，PCF)网元、AF网元、无线接入网(Radio Access Network，RAN)网元(也可称为接入网(Access Network，AN)网元)、UPF网元、DN网元等网元。其中，SMF网元负责会话管理、终端的互联网协议(Internet Protocol，IP)地址分配与管理，UP锚点功能的分配与选择、并且负责UPF与用户面路径的(重)选择等。AMF网元负责接入与移动性管理，是NG2(AMF与RAN设备之间的接口)接口的终结点，终结了NAS消息、完成注册管理、连接管理以及可达性管理、分配TA list以及移动性管理等，并且透明路由会话管理(Session Management，SM)消息到SMF网元。UPF网元是用户面功能设备，负责数据包的路由与转发、合法监听、以及下行数据包缓存并且触发下行数据包通知消息等功能。
同时，需要说明的是，本申请实施例中，终端，又称之为用户设备(User Equipment，终端)，是一种向用户提供语音和/或数据连通性的设备，例如，具有无线连接功能的手持式设备、车载设备等。常见的终端例如包括：手机、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，例如智能手表、智能手环、计步器等。
基于上述描述，参见图4，为本申请实施例提供的一种移动性管理的处理方法流程示意图。该方法包括：
步骤401：SMF网元接收UPF网元发送的包括PDU会话标识的数据通知消息，并根据所述PDU会话标识确定所述PDU会话标识对应的SSC模式和/或UPF网元的服务区域，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元。
步骤402：所述SMF网元根据所述SSC模式和/或UPF网元的服务区域确定寻呼区域。
其中，所述SMF网元确定出的寻呼区域小于或等于所述PDU会话对应的终端的跟踪 区列表指示的区域。
步骤403：所述SMF网元向接入与AMF网元发送包括所述寻呼区域的第一消息，所述第一消息用于触发所述AMF网元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端。
步骤404：AMF网元接收SMF网元发送的包括寻呼区域的第一消息，所述寻呼区域为所述SMF网元根据SSC模式和/或用户面功能UPF网元的服务区域确定的。
其中，所述SSC模式和/或UPF网元的服务区域为所述SMF网元根据获取到的PDU会话标识确定的，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元。
步骤405：所述AMF网元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话标识对应的PDU会话的终端。
步骤401中，终端建立PDU会话之后，当终端与AMF网元之间没有非接入层(Non-Access Stratum，NAS)信令连接以及数据传输时，终端处于空闲态，N2接口(AMF网元与RAN网元之间的接口)信令连接与N3接口(RAN网元与UPF网元之间的接口)数据(用户面)传输通道连接均不存在。当UPF网元收到终端下行数据包时，或者UPF网元等核心网设备触发控制信令过程时，UPF网元可以确定所述下行数据包或控制信令所属的PDU会话的PDU会话标识。
UPF网元根据接收到所述终端的下行数据包确定PDU会话标识之后，可以向SMF网元发送包括所述PDU会话标识的数据通知消息，从而通知网络设备(例如SMF网元/AMF网元)网元寻呼终端，以便向终端发送下行数据包。
由于PDU会话标识能够唯一标识一个PDU会话，而PDU会话是由终端通过UPF网元与数据网络建立的，建立每个PDU会话的同时会确定PDU会话的SSC模式，因此SMF网元可以根据所述PDU会话标识确定所述PDU会话标识对应的SSC模式以及建立所述PDU会话标识的UPF网元的服务区域中的至少一种。
在步骤402中，SMF网元确定寻呼区域的方式有多种，下面详细描述。
第一种可能的寻呼区域确定方式中，所述SMF网元若确定所述PDU会话标识对应的PDU会话的SSC模式为SSC模式2，则可以将建立所述PDU会话的UPF网元的服务区域作为寻呼区域。
需要说明的是，寻呼区域可以与UPF网元的服务区域相同，也可以不同。比如，SMF网元可以根据终端的历史位置，将终端在服务区域中驻留过的历史区域确定为寻呼区域，此时寻呼区域比UPF网元的服务区域小。
第二种可能的寻呼区域确定方式中，所述SMF网元若确定所述PDU会话的SSC模式为SSC模式1或者SSC模式3，则将跟踪区列表指示的区域作为寻呼区域。
第三种可能的寻呼区域确定方式中，所述SMF网元根据所述跟踪区列表与UPF网元的服务区域确定寻呼区域。具体的，所述SMF网元可以将所述服务区域与所述跟踪区列表指示的区域重叠的区域确定为所述寻呼区域。
需要说明的是，跟踪区列表是由移动性管理网元(比如AMF网元)分配的，指示出一个位置区域，当终端在跟踪区列表指示的区域内移动时，不会发起跟踪区更新过程，当终端离开跟踪区列表指示的区域时，则会发起跟踪区更新过程。发起跟踪区更新过程是为了使移动网络能够知道终端所在的位置区域，从而可以更加有效地进行移动性管理过程，在5G技术研究中，跟踪区更新过程也可以称为移动注册更新过程，通过该过程，终端设 备向网络侧重新注册其当前位置。
本申请实施例中，AMF网元可以在生成跟踪区列表之后，可以将跟踪区列表发送给SMF网元。本申请实施例对AMF网元向SMF网元发送跟踪区列表的方式并不限定。例如，AMF网元可以在终端向移动通信网络注册的过程中发送跟踪区列表，也可以在终端的跟踪区更新过程中向SMF网元发送跟踪区列表。具体的，如图5所示，为本申请实施例提供的一种跟踪区更新过程示意图。图5中，包括：
步骤501，终端向AMF网元发送跟踪区更新(Tracking Area Update，TAU)或者，移动注册更新(Mobility Registration Update，MRU)请求消息，用于触发终端的跟踪区更新过程。
步骤502，AMF网元接收到TAU或者MRU请求消息之后，生成跟踪区列表。
AMF网元生成跟踪区列表的具体方式，本申请实施例对此并不限定。
步骤503，AMF网元向SMF网元发送包括跟踪区列表的SM请求消息。该步骤的目的是将跟踪区列表通知SMF网元。
需要说明的是，AMF网元向SMF网元发送跟踪区列表的过程不限于该消息，也可以在其它的消息中完成。
步骤504，AMF网元向终端发送包括跟踪区列表的TAU接受消息。
需要说明的是，步骤503和步骤504的执行顺序并不限定。
可选的，所述SMF网元还可以启动第一定时器；第一定时器的定时时长为预设时长，预设时长的大小可以根据具体情况确定，本申请实施例对此并不限定。所述SMF网元若在所述第一定时器定时超时之后，确定所述AMF网元未收到寻呼响应，在一定时间内没有收到寻呼过程触发的服务请求过程可以认为是未收到寻呼响应，则向所述UPF网元发送丢包指示信息，所述丢包指示信息用于指示所述UPF网元丢弃接收到所述终端的下行数据包。
可选的，UPF网元也可以启动第二定时器，例如在接受到所述终端的下行数据包或者向SMF网元发送数据通知消息之后启动第二定时器。所述UPF网元若在所述第二定时器超时之后，确定所述AMF网元未收到寻呼响应，则丢弃接收到所述终端的下行数据包。第二定时器的定时时长可以根据具体情况确定，本申请实施例对此并不限定。
通过上述方法，SMF网元在一定时间内确定AMF网元接收不到终端的寻呼响应，则指示UPF网元丢弃接收到所述终端的下行数据包。尤其是对于SSC模式2的PDU会话，由于如果终端离开了UPF网元的服务区域，由于该PDU会话的UPF网元需要重新选择，则终端设备的IP地址可能需要变化，从而可能会导致PDU会话会被中断，那么，这些数据包有可能是不能够再被发送到终端，所以可以丢弃数据包，从而可以节省UPF网元的网络资源，提高系统运行效率。
需要说明的是，本申请实施例中，SMF网元可以在接收到数据通知消息后启动第一定时器，也可以在向AMF网元发送第一消息时启动第一定时器，具体可以根据实际情况确定，本申请实施例对此并不限定。
在步骤403中，SMF网元还可以通过第一消息向AMF网元发送寻呼策略。
本申请实施例中，所述寻呼策略可以包括以下一项或多项：
寻呼次数，所述寻呼次数指示出所述AMF网元寻呼所述终端次数；
寻呼周期，所述寻周期指示出所述AMF网元寻呼所述终端的周期；
寻呼指示信息，所述寻呼指示信息指示所述AMF网元寻呼所述终端的方式。举例来说，所述寻呼指示信息可以指示AMF网元若在所述寻呼区域中未收到寻呼响应，则在跟踪区列表指示的区域中寻呼所述终端。
当然，也可以不发送寻呼指示信息，而是隐式的指示AMF网元分别在寻呼区域和跟踪区列表指示的区域中寻呼终端，例如向AMF网元发送包括寻呼区域和跟踪区列表的第一消息，从而实现指示AMF网元若在所述寻呼区域中未收到寻呼响应，则在跟踪区列表指示的区域中寻呼所述终端。
需要说明的是，第一消息中还可以包括PDU会话标识等信息，在此不再一一赘述。
在步骤404中，AMF网元接收到第一消息之后，可以在步骤405中向无线接入网网元发送第二消息，所述第二消息中包括寻呼区域，所述第二消息用于触发所述无线接入网网元根据所述寻呼区域寻呼所述终端。无线接入网网元确定寻呼所述终端的寻呼区域会依据一些接入网的信息，AMF网元通过第二消息发送的寻呼区域可能只是无线接入网网元确定寻呼所述终端的寻呼区域的其中一个因素，因此第二消息中的寻呼区域可能与无线接入网网元寻呼所述终端的寻呼区域不同。因此，所述第二消息中的寻呼区域可以用于所述无线接入网网元确定所述无线接入网网元寻呼所述终端的寻呼区域。
可选的，所述AMF网元还可以通过所述第二消息向无线接入网网元发送寻呼策略等信息，最终无线接入网网元可以根据所述寻呼区域以及所述寻呼策略对终端进行寻呼。
无线接入网网元寻呼终端的具体过程可以参考现有技术中的描述，在此不再赘述。
本申请实施例中，AMF向无线接入网网元发送第二消息之后，若确定无线接入网网元在所述寻呼区域中未收到终端的寻呼响应，则还可以指示所述无线接入网网元在跟踪区列表指示的区域中寻呼所述终端。
下面通过具体的实施例描述前面的过程。
如图6所示，为本申请实施例提供的一种移动性管理的处理过程示意图。图6所示的寻呼过程之前，终端通过UPF网元与DN网元建立了PDU会话，而后终端转入空闲态。
步骤601：UPF网元收到该PDU会话的下行数据包之后，向SMF网元发送数据通知消息，数据通知消息中包含有该PDU会话的PDU会话标识等信息。
步骤602：SMF网元根据PDU会话标识确定为该PDU会话标识对应的PDU会话建立连接的UPF网元，并且根据UPF网元的服务区域以及该PDU会话的SSC模式确定寻呼区域。
具体确定寻呼区域的方法，可以参考前面的描述，在此不再赘述。
可选地，SMF网元可以启动第一定时器，在第一定时器超时之后，若未收到寻呼响应，则向所述UPF网元发送丢包指示信息。
步骤603：SMF网元向AMF网元发送第一消息。第一消息中可以包括PDU会话标识、寻呼区域以及寻呼策略(Paging Policy)等。
所述第一消息可以称之为N11消息，N11消息是现在协议中暂时定的，将来可能会修改。
步骤604：AMF网元向无线接入网网元发送第二消息，第二消息中可以包括寻呼区域、跟踪区列表、寻呼策略等。
步骤605：RAN网元根据寻呼区域和/或寻呼策略等信息向终端发送寻呼消息，从而寻呼终端。
通过上述方法，SMF网元在接收到包括PDU标识的数据通知消息之后，根据PDU标识确定所述PDU标识对应的UPF网元的服务区域以及SSC模式，从而根据UPF网元的服务区域以及SSC模式确定寻呼区域，并指示AMF根据所述寻呼区域寻呼终端。由于确定出的寻呼区域小于或等于所述PDU会话对应的终端的跟踪区列表指示的区域，从而可以更快的确定是否可以寻呼到终端，从而提高终端的接入效率。
本申请实施例中，还可以由AMF网元确定寻呼区域，具体的，如图7所示，为本申请实施例提供的一种移动性管理的处理方法流程示意图。该方法包括：
步骤701：SMF网元接收UPF网元发送的包括PDU会话标识的数据通知消息，并根据所述PDU会话标识确定所述PDU会话标识对应的SSC模式以及所述UPF网元的服务区域中的至少一项，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元。
步骤702：所述SMF网元向AMF网元发送第一消息，所述第一消息中包括所述SSC模式以及所述服务区域中的至少一项，所述第一消息用于触发所述AMF网元寻呼通过所述UPF网元建立所述PDU会话的终端。
步骤703：AMF网元接收SMF网元发送的第一消息，所述第一消息中包括SSC模式以及UPF网元的服务区域中的至少一项，所述SSC模式以及所述服务区域为所述SMF网元根据获取到的PDU会话标识确定的，所述服务区域为建立所述PDU会话标识对应的PDU会话的用户面功能UPF网元的服务区域。
步骤704：所述AMF网元根据所述SSC模式以及所述服务区域中的至少一项确定寻呼区域，并在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端。
可选的，所述寻呼区域小于或等于所述PDU会话对应的终端的跟踪区列表指示的区域。
步骤701中，终端建立PDU会话之后，当终端与AMF网元之间没有NAS信令连接时，终端处于空闲态。当UPF网元收到终端的下行数据包时，或者UPF网元等核心网设备触发控制信令过程时，UPF网元可以确定所述下行数据包或控制信令所属的PDU会话的PDU会话标识。
UPF网元包确定PDU会话标识之后，可以向SMF网元发送包括所述PDU会话标识的数据通知消息，从而通知SMF网元需要寻呼终端，以便向终端发送下行数据包。
SMF网元接收到包括所述PDU会话标识的数据通知消息之后，可以根据所述PDU会话标识确定所述PDU会话标识对应的SSC模式以及建立所述PDU会话标识的UPF网元的服务区域中的至少一种。
可选的，所述SMF网元还可以启动第一定时器；第一定时器的定时时长为预设时长，预设时长的大小可以根据具体情况确定，本申请实施例对此并不限定。所述SMF网元若在所述第一定时器定时超时之后，确定未收到寻呼响应，则向所述UPF网元发送丢包指示信息，所述丢包指示信息用于指示所述UPF网元丢弃接收到所述终端的下行数据包。
可选的，UPF网元也可以启动第二定时器，例如在接受到所述终端的下行数据包或者向SMF网元发送数据通知消息之后启动第二定时器。所述UPF网元若在所述第二定时器定时超时之后，确定未收到寻呼响应，则丢弃接收到所述终端的下行数据包。第二定时器的定时时长可以根据具体情况确定，本申请实施例对此并不限定。
通过上述方法，SMF网元在一定时间内确定AMF网元接收不到终端的寻呼响应，则指示UPF网元丢弃接收到所述终端的下行数据包，从而可以节省UPF网元的网络资源， 提高系统运行效率。
步骤702中，所述SMF网元向AMF网元发送的第一消息中还可以包括PDU会话标识等信息。
步骤703中，AMF网元确定寻呼区域的方式有多种，下面详细描述。
第一种可能的寻呼区域确定方式中，所述AMF网元若确定所述SSC模式为SSC模式1，则将跟踪区列表指示的区域确定为所述寻呼区域。
第二种可能的寻呼区域确定方式中，所述AMF网元若确定所述SSC模式为SSC模式2或SSC模式3，则将所述服务区域确定为所述寻呼区域。
需要说明的是，寻呼区域可以与UPF网元的服务区域相同，也可以不同。比如，SMF网元可以根据终端的历史位置，将终端在服务区域中驻留过的历史区域确定为寻呼区域，此时寻呼区域比UPF网元的服务区域小。
第三种可能的寻呼区域确定方式中，所述AMF网元若确定所述SSC模式为SSC模式2或SSC模式3，则将所述服务区域与跟踪区列表的重叠覆盖区域确定为所述寻呼区域。
可选的，所述AMF还可以确定寻呼策略，所述寻呼策略可以包括以下一项或多项：
寻呼次数，所述寻呼次数用于指示所述无线接入网网元寻呼终端的次数；
寻呼周期，所述寻周期用于指示所述无线接入网网元寻呼所述终端的周期；
寻呼指示信息，所述寻呼指示信息用于指示所述无线接入网网元寻呼终端的方式。举例来说，所述寻呼指示信息指示无线接入网网元若在所述寻呼区域中未收到寻呼响应，则在跟踪区列表指示的区域中寻呼所述终端。当然，AMF网元也可以不发送寻呼指示信息，而是隐式的指示无线接入网网元分别在寻呼区域和跟踪区列表指示的区域中寻呼终端，例如向无线接入网网元发送包括寻呼区域和跟踪区列表的第二消息，从而实现指示无线接入网网元若在所述寻呼区域中未收到寻呼响应，则在跟踪区列表指示的区域中寻呼所述终端。
步骤704中，AMF网元可以向无线接入网网元发送第二消息，所述第二消息中包括寻呼区域，所述第二消息用于触发所述无线接入网网元根据所述寻呼区域寻呼所述终端。
可选的，所述第二消息中还可以包括PDU会话标识以及寻呼策略等信息。
最终，无线接入网网元根据所述寻呼区域进行寻呼，寻呼的具体过程可以参考现有技术，在此不再赘述。
下面通过具体的实施例描述前面的过程。
如图8所示，为本申请实施例提供的一种移动性管理的处理过程示意图。图8所示的寻呼过程之前，终端通过UPF网元与DN网元建立了PDU会话，而后终端转入空闲态。
步骤801：UPF网元收到该PDU会话的下行数据包之后，向SMF网元发送数据通知消息，数据通知消息中包含有该PDU会话的PDU会话标识等信息。
步骤802：SMF网元根据PDU会话标识确定为该PDU会话标识对应的PDU会话建立连接的UPF网元以及所述PDU会话标识对应的SSC模式。
可选地，SMF网元可以启动第一定时器，在第一定时器超时之后，若确定AMF网元未收到寻呼响应，则向所述UPF网元发送丢包指示信息。
步骤803：SMF网元向AMF网元发送第一消息。第一消息中可以包括SSC模式以及UPF网元的服务区域中的至少一项。
所述第一消息中还可以包括PDU会话标识。所述第一消息也可以称之为N11消息。
步骤804：AMF网元根据SSC模式以及UPF网元的服务区域中的至少一项确定寻呼区域。
AMF网元确定寻呼区域的具体过程可以参考前面的描述，在此不再赘述。
可选的，AMF网元还可以确定寻呼策略。
步骤805：AMF网元向无线接入网网元发送第二消息，第二消息中可以包括寻呼区域、跟踪区列表。
可选的，第二消息中可以还包括寻呼策略。
步骤806：RAN网元根据寻呼区域和/或寻呼策略等信息向终端发送寻呼消息，从而寻呼终端。
通过上述方法，AMF网元在接收到包括SSC模式以及UPF网元的服务区域中的至少一项的第一消息之后，根据SSC模式以及UPF网元的服务区域中的至少一项确定寻呼区域，并指示无线接入网网元根据所述寻呼区域寻呼终端。由于确定出的寻呼区域小于或等于所述PDU会话对应的终端的跟踪区列表指示的区域，从而可以更快的确定是否可以寻呼到终端，从而提高终端的接入效率。
本申请实施例中，终端在转为连接态之后，SMF网元还可以确定是否触发建立用户面传输通道。终端转为连接态有多种情况，包括但不限于：终端的其中一个PDU会话收到下行数据包而触发的寻呼与服务请求过程，或者，由网络侧设备，比如PCF网元或UPF网元等触发的信令过程。
具体的，如图9所示，为本申请实施例提供的一种移动性管理的处理方法流程示意图。该方法包括：
步骤901：SMF网元接收UPF网元发送的包括PDU会话标识的数据通知消息；所述PDU会话标识为终端通过所述UPF网元建立所述PDU会话标识对应的PDU会话的标识。
步骤902：所述SMF网元根据所述PDU会话标识确定所述UPF网元的服务区域以及所述PDU会话的SSC模式。
步骤903：所述SMF网元根据所述服务区域以及所述PDU会话的SSC模式确定是否触发建立用户面传输通道。
步骤901以及步骤902的具体内容可以参考步骤401至步骤402中的描述，在此不再赘述。
步骤903中，第一种可能的实现方式中，所述SMF网元若确定所述PDU会话的SSC模式为SSC模式2，且所述终端位于所述服务区域中，则触发建立所述用户面传输通道。
第二种可能的实现方式中，所述SMF网元若确定所述PDU会话的SSC模式为SSC模式2，且所述终端不位于所述服务区域中，则忽略所述数据通知消息。
第三种可能的实现方式中，所述SMF网元若确定所述终端位于所述服务区域中，则触发建立所述用户面传输通道。
第四种可能的实现方式中，所述SMF网元若确定所述PDU会话的SSC模式为SSC模式1或SSC模式3，且所述终端不位于所述服务区域中，则触发建立所述用户面传输通道。
可选的，所述SMF网元忽略所述数据通知消息之后，还可以向所述UPF网元发送丢包指示信息，所述丢包指示信息用于指示所述UPF网元丢弃接收到所述终端的下行数据。
下面通过具体的实施例描述前面的过程。
如图10所示，为本申请实施例提供的一种移动性管理的处理方法流程示意图。图10所示的流程之前，终端已经转为连接态。
步骤1001：UPF网元收到终端的下行数据包之后，向SMF网元发送数据通知消息，数据通知消息中包含有该下行数据包所属的PDU会话的PDU会话标识等信息。
步骤1002：SMF网元根据PDU会话标识确定为该PDU会话标识对应的PDU会话建立连接的UPF网元以及所述PDU会话标识对应的SSC模式，并根据所述UPF网元的服务区域以及所述PDU会话的SSC模式确定是否触发建立用户面传输通道。
具体的，所述SMF网元若确定所述PDU会话的SSC模式为SSC模式2，且所述终端位于所述服务区域中，则触发建立所述用户面传输通道，并执行步骤1003以及步骤1003之后的步骤。
第二种可能的实现方式中，所述SMF网元若确定所述PDU会话的SSC模式为SSC模式2，且所述终端不位于所述服务区域中，则忽略所述数据通知消息，并跳过步骤1003，执行步骤1004以及步骤1004之后的步骤。可选地，SMF网元可以通知UPF网元丢弃接收到的所述终端的下行数据包，后续步骤不执行。
第三种可能的实现方式中，所述SMF网元若确定所述终端位于所述服务区域中，则触发建立所述用户面传输通道，并执行步骤1003以及步骤1003之后的步骤。
第四种可能的实现方式中，所述SMF网元若确定所述PDU会话的SSC模式为SSC模式1或SSC模式3，且所述终端不位于所述服务区域中，则触发建立所述用户面传输通道，并执行步骤1003以及步骤1003之后的步骤。
步骤1003：SMF网元向UPF网元发送数据通知确认消息。
可选的，数据通知确认消息中包括丢包指示信息。
步骤1004：SMF网元向AMF网元发送N11消息，所述N11消息用于触发建立收到下行数据包的PDU会话的RAN设备与UPF之间的数据传输通道。
步骤1005：AMF网元向SMF网元发送N11确认消息。
本申请实施例还提供了一种跟踪区列表生成方法，具体的，如图11所示，为本申请实施例提供的一种移动性管理的处理方法流程示意图，所述方法包括：
步骤1101：AMF网元接收SMF网元发送的PDU会话信息，所述PDU会话信息包括以下至少一项：第一PDU会话的SSC模式；建立所述PDU会话的UPF网元的服务区域；
步骤1102：所述AMF网元根据所述PDU会话信息确定跟踪区列表指示的区域。
步骤1101中，AMF网元可以在多种情况下接收到SMF网元发送的PDU会话信息，举例来说，终端发起建立第一PDU会话的注册过程之后，SMF根据建立的第一PDU会话确定PDU会话信息，并向AMF网元发送所述PDU会话信息。
步骤1102中，所述AMF网元若确定所述第一PDU会话的SSC模式为SSC模式2，则将所述服务区域作为跟踪区列表指示的区域。
所述AMF网元若确定所述第一PDU会话的SSC模式为SSC模式2，且所述PDU会话信息中包括第二PDU会话的SSC模式，且第二PDU会话的SSC模式为SSC模式1或SSC模式3，则确定出的跟踪区列表指示的区域包括第一级区域和第二级区域，其中，第一级区域为第一PDU会话独享的跟踪区列表指示的区域，第二级区域为第一PDU会话以及第二PDU会话共享的跟踪区列表指示的区域。第一级区域可以为第一PDU会话对应的UPF的服务区域。
可选的，AMF网元还可以向终端发送所述跟踪区列表。终端随后可以根据PDU会话信息确定触发跟踪区更新过程。
本申请实施例中，终端若存在SSC模式为SSC模式2的第一PDU会话，则终端在确定离开第一PDU会话独享的跟踪区列表指示的区域时，触发跟踪区更新过程。终端若只存在SSC模式为SSC模式1或SSC模式3的第二PDU会话，则终端在确定离开第一PDU会话独享的跟踪区列表指示的区域时，不触发跟踪区更新过程。
可选的，终端在第一级区域和第二级区域的重叠覆盖的区域中移动时，不发起位置区域更新过程。
下面通过具体的实施例描述前面的过程。
如图12所示，为本申请实施例提供的一种移动性管理的处理方法流程示意图。图12所示的流程以建立PDU会话的注册过程为例说明(比如注册过程中建立了两个PDU会话)，但本申请实施例并不限于该过程。
步骤1～步骤4与现有技术相同。
步骤1201.终端发起注册请求消息，请求建立PDU会话。
步骤1202.RAN网元为终端选择AMF网元。
步骤1203.RAN网元向AMF网元发送注册请求。
步骤1204.AMF网元为终端选择SMF网元。
步骤1205.AMF网元向SMF网元发送SM请求，该SM消息包括终端的位置信息、业务区域限制(Service Area Restriction/Mobility Restriction area)。
业务区域限制是限制终端通信业务的区域，在该区域内终端不能与移动通信网络建立任何信令/数据连接，也不能响应网络发起的寻呼等业务。
步骤1206.SMF网元选择UDM网元；
步骤1207.SMF网元向UDM网元请求签约数据，签约数据包括会话有关的签约数据。
步骤1208.SMF网元根据终端的位置，进一步地，基于业务区域限制选择UPF网元。
步骤1209～步骤1210.建立PDU会话，以建立PDU会话1和PDU会话2为例。
步骤1211.SMF网元向AMF网元发送PDU会话建立请求确认消息，消息中包括PDU会话信息，PDU会话信息包括PDU会话SSC模式和/或UPF的服务区域。
步骤1212.AMF网元基于PDU会话信息产生跟踪区列表，具体产生跟踪区列表方式可以包括但不限制：
方式a.如果有SSC模式2的PDU会话，可以将该PDU会话对应的UPF网元的服务区域作为跟踪区列表指示的区域；
方式b.如果有SSC模式2以及SSC模式1或SSC模式3的PDU会话，生成的跟踪区列表指示的区域可以包括第一级区域和第二级区域，在生成跟踪区列表时，将SSC模式2的PDU会话的UPF网元的服务区域单独该PDU会话的跟踪区列表指示的区域。
步骤1213.AMF网元向终端发送注册接受消息，消息中包含跟踪区列表信息。
步骤1214.终端向AMF网元发送注册完成消息。
如果按照方式b中生成两级跟踪区列表，如果两级跟踪区列表有重叠区域，那么在该重叠区域中移动时，不发起位置区更新过程，否则终端发起位置区更新过程。
结合前面的描述，本申请实施例中，SMF网元可以接收AMF网元发送的业务限制区域信息；随后，所述SMF网元可以根据所述业务限制区域信息为终端选择为所述终端建 立PDU会话的UPF网元。
具体的，SMF网元可以根据终端的位置信息确定至少一个UPF网元。其中，所述至少一个UPF网元中每个UPF网元可以为服务区域覆盖所述终端的位置信息指示的位置的UPF网元。当然，所述至少一个UPF网元还可以为根据其他方式确定的，在此并不限定。
SMF网元可以将所述至少一个UPF网元中服务区域与所述业务限制区域信息指示的区域重叠范围最小的UPF网元，确定为建立所述PDU会话的UPF网元。
举例来说，如图13所示，为本申请实施例提供的一种业务限制区域示意图。图13中，终端1304同时位于UPF网元1的服务区域1301和UPF网元2的服务区域1302覆盖范围内，因此可以将UPF网元1和UPF网元2中的一个UPF网元作为为终端1304建立PDU会话的UPF网元。同时，由于终端1304的业务限制区域1303位于UPF网元2的服务区域1302覆盖范围内，因此可以将UPF网元1确定为为终端1304建立PDU会话的UPF网元。因为终端1304是可以感知到业务限制区域的，网络侧可以隐式的感觉到终端1304的行动轨迹，比如说，终端1304可能不会向UPF网元2所示的区域移动，因为那边有业务限制区域，而向UPF网元1的区域移动的可能性大，所以为终端1304选择UPF网元1比UPF网元2更好。
目前，当终端通过第一UPF网元与DN网元建立PDU会话之后，若终端移动到第一UPF网元的服务区域之外时，如果网络侧在为终端配置的跟踪区列表指示的区域范围内寻呼终端，按照现有技术，终端收到寻呼消息后，会发起服务请求过程，在该过程中，终端的数据传输通道恢复，第一UPF网元收到的下行数据包可以通过该数据传输通道发送到终端(包括缓存的数据包)。
但是，对于有些场景来说，第一UPF网元缓存应用数据包，对于DN网元侧的应用来说，认为是通过第一UPF网元向终端发送数据包，但是当终端移动离开了该第一UPF网元的服务区域时，按照UPF网元的重选原则，网络侧可以为终端服务的UPF网元进行重选，所以如果移动网络侧为终端重选了第二UPF网元后，DN网元侧的应用如果不能感知，则数据包仍然会发送到第一UPF网元上，所以数据包不能发送到终端，从而导致业务无法正常进行，另外一方面，即使重选的UPF网元仍然为第一UPF网元，第一UPF网元可能会重新为终端分配IP地址，所以终端的IP地址也发生变化，对于应用来说，如果还是依然用终端的老的IP地址作为数据包的目标地址的话，数据包也无法正常发送到终端。
综上所述，即使网络侧通过寻呼过程使终端发起服务请求过程，并且为终端重选新的UPF网元，建立新的数据包传输通道，下行数据不能发送到终端,终端也不能感知到触发寻呼的下行数据包的应用，所以也不能主动发起与应用联系，从而实现数据传输。
当然，终端发起服务请求过程，并不是仅仅可以是由于终端被寻呼时才发生的，对于处于空闲态的终端，如果终端主动发起业务，也会发起服务请求过程。当终端发起服务请求过程时，网络侧设备(SMF/AMF)可以获取终端的位置信息，根据当前终端的PDU会话的信息，比如，如果有SSC模式2的PDU会话，而且终端的位置不在该会话的UPF设备的服务区域内，那么，网络侧可以为该PDU会话重新选择UPF设备，并通知终端发起PDU会话建立过程。
基于上述描述，如图14所示，为本申请实施例提供一种移动性管理的处理方法示意图。
参见图14，所述方法包括：
步骤1401：SMF网元获取终端的PDU会话标识以及所述终端的位置信息。
步骤1402：所述SMF网元若根据所述PDU会话标识以及所述终端的位置信息确定重选所述PDU会话标识对应的第一PDU会话的UPF网元，则通过AMF网元触发所述终端发起建立第二PDU会话过程。
步骤1401中，SMF网元可以接收AMF网元发送的所述终端的PDU会话标识以及所述终端的位置信息。
举例来说，第一PDU会话的UPF网元接收到终端的下行数据包之后，向SMF网元发送数据通知消息，SMF网元从而触发AMF网元寻呼所述终端，所述数据通知消息中可以包括所述下行数据包所属的第一PDU会话的PDU会话标识。AMF网元寻呼所述终端后，所述终端可以通过AMF网元发起服务请求过程，从而获取所述终端的位置信息，从而将获取到的PDU会话标识以及位置信息发送给SMF网元。
可选的，第一PDU会话的UPF网元向SMF网元发送的数据通知消息中还可以包括应用信息。所述SMF网元从而可以接收第一PDU会话的UPF网元发送的包括应用信息的数据通知消息；应用信息可以是UPF网元收到的下行数据包的应用标识信息，也可以是一个或者多个UPF网元接收到的下行数据包。所述数据通知消息为所述第一PDU会话的UPF网元接收到所述终端的下行数据包之后发送的。
本申请实施例中，所述SMF网元还可以向所述AMF网元发送所述应用信息，所述应用信息用于通知终端触发寻呼过程的应用信息。
步骤1402中，所述SMF网元可以通过以下方式触发所述终端建立第二PDU会话：
所述SMF网元先确定指示所述终端发起建立第二PDU会话过程的PDU会话状态信息，并通过所述AMF网元向终端发送所述PDU会话状态信息，从而触发所述终端发起建立第二PDU会话过程。
PDU会话状态信息可以是SMF网元确定的，比如SMF网元确定该PDU会话的UPF网元须重选，从而确定该PDU会话状态为不可用(Not available)，将该PDU会话的标识以及PDU会话状态信息发送到AMF网元，从而AMF网元获取到该PDU会话的状态信息，并将其通知终端。
SMF网元确定PDU会话状态信息也可以有另外一种方式，当SMF网元确定PDU会话的UPF网元须重选，SMF网元发起释放原PDU会话的过程，该释放PDU会话的过程，AMF网元能够感知到，比如SMF网元通知AMF网元发起PDU会话释放的过程，从而通知RAN网元释放相关数据传输通道，在这个过程中，AMF网元能够感知到该PDU会话标识标识的PDU会话已被释放，也就是该会话的PDU会话状态信息为不可用。在这种场景中，也可以认为SMF网元确定的PDU会话状态信息，并且将PDU会话状态信息通知到AMF网元。
终端发起建立第二PDU会话过程之后，网络侧可以为终端重新建立新的PDU会话，即第二PDU会话，从而可以使得终端与应用重新建立连接，从而能够使业务能够正常进行，提高了系统的效率，提升了用户体验。
需要说明的是，网络侧可以为终端通过第一PDU会话的UPF网元建立第二PDU会话，也可以重新为终端确定一个UPF网元建立第二PDU会话，本申请实施例对此并不限定。
下面详细描述上面的过程。
如图15所示，为本申请实施例提供一种PDU会话建立流程示意图。
步骤1501:UPF网元收到下行数据包。
步骤1502:UPF网元向SMF网元发送数据通知消息，数据通知消息中包含有PDU会话标识等信息。所述PDU会话标识对应第一PDU会话。
步骤1503:SMF网元向AMF网元发送N11消息，该N11消息中包含有PDU会话标识、SM信息等。
步骤1504:AMF网元寻呼终端。
步骤1505:下行数据包所属的终端的收到寻呼消息后，终端向AMF网元发送服务请求消息，从而发起服务请求过程，以便于建立终端与UPF网元之间的数据传输通道。
步骤1506:AMF网元向SMF网元发送N11消息，该N11消息中包含有PDU会话标识等信息，也可以包含终端的位置信息。SMF网元可以确定为终端的该PDU会话重选UPF网元，比如可以根据终端的位置信息。在这种情况下，SMF网元确定PDU会话状态信息，比如当前PDU会话不可用等指示，具体形式不限制。
步骤1507:SMF网元向AMF网元发送消息，N11消息中包含有核心网侧的数据传输通道信息，以便于与RAN网元侧建立数据传输通道。
步骤1508:AMF网元向RAN网元发送N2请求消息，N2请求消息中包含有NAS层服务请求接受信息，该信息可以包含有PDU会话状态信息，PDU会话信息可以是指该PDU会话不可用等，具体形式不限制。
可选地，在该步骤中，AMF网元若启动定时器，也可以在N2请求消息中包含有定时器信息。
步骤1509:RAN网元向终端发送无线资源控制(Radio Resource Control，RRC)连接重配置过程，可以在该过程中，RAN网元侧将在步骤1508中收到PDU会话状态信息和/或定时器信息通知终端。
步骤1510:RAN网元向发送N2请求确认消息。
步骤1511:AMF网元向发送N11消息。
步骤1512a:SMF网元向第一PDU会话的UPF网元发送N4会话更新请求。
步骤1512b:第一PDU会话的UPF网元向SMF网元发送N4会话更新响应。
步骤1510～步骤1512b与现有技术相同，实现恢复终端与第一PDU会话的UPF网元的数据传输通道。
数据传输通道建立之后，UPF收到的下行数据包发送到终端设备，从而终端设备能够感知到发送下行数据据的应用的信息，比如应用名称、或者，应用服务器信息等。
步骤1513:SMF网元向AMF网元发送N11消息确认消息，如果步骤1508中没有包含PDU会话状态信息，该步骤中可以包含有PDU会话信息。
步骤1514:AMF网元向终端发送NAS层消息，NAS层消息中包含有PDU会话状态信息。
当终端收到会话状态信息后，终端可以根据会话状态信息的指示发起第二PDU会话新建过程，PDU会话信息的具体形式不限制，可以是第一PDU会话不可用，或者重新建立PDU会话等。
如果终端在步骤1508中还收到了定时器信息，可以根据定时器信息中的时长，启动定时器以便于完成上图中步骤1510～步骤1513。
终端发起第二PDU会话建立之后，网络侧可以根据终端当前的位置信息选择相应的 UPF网元，为终端与数据网络建立数据传输通道。终端根据收到的下行数据包确定与其通信的应用信息，从而终端可以通过第二PDU会话与所述应用信息的应用建立通信联系。
如图16所示，为本申请实施例提供一种PDU会话建立流程示意图。
步骤1601:UPF网元收到下行数据包。
步骤1602:UPF网元向SMF网元发送数据通知消息，该数据通知消息中包含有PDU会话标识等信息。所述PDU会话标识对应第一PDU会话。
该数据通知消息中还可以包含有应用信息，应用信息的具体形式不限制，可以是全部或者部分缓存的数据包，或者应用标识等信息。
步骤1603:SMF网元向AMF网元发送N11消息，该N11消息中包含有PDU会话标识、SM信息等。
步骤1604:AMF网元寻呼终端。
步骤1605:下行数据包所属的终端的收到寻呼消息后，终端向AMF网元发送服务请求消息，从而发起服务请求过程，以便于建立终端与UPF网元之间的数据传输通道。
步骤1606:AMF网元向SMF网元发送N11消息，该N11消息中包含有PDU会话标识，也可以包含终端的位置信息。SMF网元可以确定第一PDU会话重选UPF，比如可以根据终端的位置信息。在这种情况下，SMF网元确定PDU会话状态信息，比如当前PDU会话不可用等指示，具体形式不限制。
步骤1607:SMF网元向AMF网元发送N11消息，该N11消息中包含有核心网侧的数据传输通道信息，以便于与RAN侧建立数据传输通道。
步骤1608:AMF网元向RAN网元发送N2请求消息，消息中包含有NAS层服务请求接受信息，该信息可以包含有PDU会话状态信息，可选地，也可以包含有应用标识等信息。
步骤1609:RAN网元向终端发送RRC连接重配置过程，可以在该过程中，RAN网元侧将PDU会话状态信息通知终端。可选地，RAN网元还可以将应用标识信息通知终端。
步骤1610:当终端收到会话状态信息后，终端可以根据会话状态信息的指示发起第二PDU会话新建过程，PDU会话状态信息的具体形式不限制，可以是PDU会话不可用，或者重新建立PDU会话等。
在建立第二PDU会话过程中，网络侧会为终端重新选择一个与第一PDU会话的UPF网元不同的UPF网元建立第二PDU会话，此时当第二PDU会话建立完成之后，终端根据接收到的应用信息，与应用信息指示的应用建立连接，从而能够使业务能够正常进行，提升了用户体验。
基于相同的技术构思，本申请实施例还提供一种移动性管理的处理装置。
如图17所示，本申请实施例提供一种移动性管理的处理结构示意图。该装置可以执行图4所示的流程中的步骤401至步骤403，以及与步骤401至步骤403相关的内容。
参见图17，该装置1700包括：
收发单元1701，用于接收用户面功能UPF网元发送的包括协议数据单元PDU会话标识的数据通知消息，并根据所述PDU会话标识确定所述PDU会话标识对应的会话与业务连续性SSC模式和/或用户面功能UPF网元的服务区域，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；
处理单元1702，用于根据所述SSC模式和/或UPF网元的服务区域确定寻呼区域；
所述收发单元，用于向接入与移动性管理功能AMF网元发送包括所述寻呼区域的第一消息，所述第一消息用于触发所述AMF网元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端。
可选的，所述处理单元1702具体用于：
若确定所述SSC模式为SSC模式2，则将所述服务区域作为寻呼区域；或者
若确定所述SSC模式为SSC模式1或者SSC模式3，则将跟踪区列表指示的区域作为寻呼区域；或者
根据所述跟踪区列表与UPF网元的服务区域确定寻呼区域。
可选的，所述处理单元1702具体用于：
将所述服务区域与所述跟踪区列表指示的区域重叠的区域确定为所述寻呼区域。
可选的，所述第一消息中还包括寻呼策略；
所述寻呼策略包括以下一项或多项：
寻呼次数，所述寻呼次数指示出所述AMF网元寻呼所述终端次数；
寻呼周期，所述寻周期指示出所述AMF网元寻呼所述终端的周期；
寻呼指示信息，所述寻呼指示信息指示所述AMF网元寻呼所述终端的方式。
可选的，所述处理单元1702还用于：
启动第一定时器；
若在所述第一定时器定时超时之后，确定所述AMF网元未收到寻呼响应，则通过所述处理单元向所述UPF网元发送丢包指示信息，所述丢包指示信息用于指示所述UPF网元丢弃接收到所述终端的下行数据。
如图18所示，本申请实施例提供一种移动性管理的处理结构示意图。该装置可以执行图4所示的流程中的步骤404至步骤405，以及与步骤404至步骤405相关的内容。
参见图18，该装置1800包括：
收发单元1801，用于接收会话管理功能SMF网元发送的包括寻呼区域的第一消息，所述寻呼区域为所述SMF网元根据会话与业务连续性SSC模式和/或用户面功能UPF网元的服务区域确定的，所述SSC模式和/或UPF网元的服务区域为所述SMF网元根据获取到的协议数据单元PDU会话标识确定的，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；
处理单元1802，用于通过所述收发单元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话标识对应的PDU会话的终端。
可选的，所述收发单元1801具体用于：
向无线接入网网元发送第二消息，所述第二消息中包括寻呼区域，所述第二消息用于触发所述无线接入网网元根据所述寻呼区域寻呼所述终端。
可选的，所述第二消息中的寻呼区域用于所述无线接入网网元确定所述无线接入网网元寻呼所述终端的寻呼区域。
可选的，所述第一消息中还包括寻呼策略；
所述寻呼策略包括以下一项或多项：
寻呼次数，所述寻呼次数用于指示寻呼所述终端的次数；
寻呼周期，所述寻周期用于指示寻呼所述终端的周期；
寻呼指示信息，所述寻呼指示信息用于指示寻呼所述终端的方式。
如图19所示，本申请实施例提供一种移动性管理的处理结构示意图。该装置可以执行图7所示的流程中的步骤701至步骤702，以及与701至步骤702相关的内容。
参见图19，该装置1900包括：
收发单元1901，用于接收用户面功能UPF网元发送的包括协议数据单元PDU会话标识的数据通知消息；
处理单元1902，用于根据所述PDU会话标识确定所述PDU会话标识对应的会话与业务连续性SSC模式以及所述UPF网元的服务区域中的至少一项，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；
所述收发单元1901，用于接入与移动性管理功能AMF网元发送第一消息，所述第一消息中包括所述SSC模式以及所述服务区域中的至少一项，所述第一消息用于触发所述AMF网元寻呼通过所述UPF网元建立所述PDU会话的终端。
可选的，所述处理单元1902还用于：
启动第一定时器；
若在所述第一定时器定时超时之后，确定未收到寻呼响应，则将接收到的所述终端的下行数据包丢弃。
如图20所示，本申请实施例提供一种移动性管理的处理结构示意图。该装置可以执行图7所示的流程中的步骤703至步骤704，以及与703至步骤704相关的内容。
参见图20，该装置2000包括：
收发单元2001，用于接收会话管理功能SMF网元发送的第一消息，所述第一消息中包括会话与业务连续性SSC模式以及用户面功能UPF网元的服务区域中的至少一项，所述SSC模式以及所述服务区域为所述SMF网元根据获取到的协议数据单元PDU会话标识确定的，所述服务区域为建立所述PDU会话标识对应的PDU会话的用户面功能UPF网元的服务区域；
处理单元2002，用于根据所述SSC模式以及所述服务区域中的至少一项确定寻呼区域，并在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端。
可选的，所述处理单元2002具体用于：
若确定所述SSC模式为SSC模式1，则将跟踪区列表指示的区域确定为所述寻呼区域；或者
若确定所述SSC模式为SSC模式2或SSC模式3，则将所述服务区域确定为所述寻呼区域，或者将所述服务区域与跟踪区列表的重叠覆盖区域确定为所述寻呼区域。
可选的，所述收发单元2001具体用于：
向无线接入网网元发送第二消息，所述第二消息中包括寻呼区域，所述第二消息用于触发所述无线接入网网元根据所述寻呼区域寻呼所述终端。
可选的，所述第二消息中还包括寻呼策略；
所述寻呼策略包括以下一项或多项：
寻呼次数，所述寻呼次数用于指示所述无线接入网网元寻呼终端的次数；
寻呼周期，所述寻周期用于指示所述无线接入网网元寻呼所述终端的周期；
寻呼指示信息，所述寻呼指示信息用于指示所述无线接入网网元寻呼终端的方式。
如图21所示，本申请实施例提供一种移动性管理的处理结构示意图。该装置可以执行图4所示的流程中的步骤401至步骤403，以及与步骤401至步骤403相关的内容。
参见图21，该装置2100包括：
收发机2101，用于接收用户面功能UPF网元发送的包括协议数据单元PDU会话标识的数据通知消息，并根据所述PDU会话标识确定所述PDU会话标识对应的会话与业务连续性SSC模式和/或用户面功能UPF网元的服务区域，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；
处理器2102，用于根据所述SSC模式和/或UPF网元的服务区域确定寻呼区域；
所述收发机，用于向接入与移动性管理功能AMF网元发送包括所述寻呼区域的第一消息，所述第一消息用于触发所述AMF网元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端。
该装置还可以包括给各个部件供电的电源2103(比如电池)，可选的，电源2103可以通过电源管理系统与处理器2102逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
该装置还可以包括存储器2104，存储器2104可用于存储软件程序以及模块，处理器2102通过运行存储在存储器2104的软件程序以及模块，从而执行该装置的各种功能应用以及数据处理。
可选的，所述处理器2102具体用于：
若确定所述SSC模式为SSC模式2，则将所述服务区域作为寻呼区域；或者
若确定所述SSC模式为SSC模式1或者SSC模式3，则将跟踪区列表指示的区域作为寻呼区域；或者
根据所述跟踪区列表与UPF网元的服务区域确定寻呼区域。
可选的，所述处理器2102具体用于：
将所述服务区域与所述跟踪区列表指示的区域重叠的区域确定为所述寻呼区域。
可选的，所述第一消息中还包括寻呼策略；
所述寻呼策略包括以下一项或多项：
寻呼次数，所述寻呼次数指示出所述AMF网元寻呼所述终端次数；
寻呼周期，所述寻周期指示出所述AMF网元寻呼所述终端的周期；
寻呼指示信息，所述寻呼指示信息指示所述AMF网元寻呼所述终端的方式。
可选的，所述处理器2102还用于：
启动第一定时器；
若在所述第一定时器定时超时之后，确定所述AMF网元未收到寻呼响应，则通过所述处理器向所述UPF网元发送丢包指示信息，所述丢包指示信息用于指示所述UPF网元丢弃接收到所述终端的下行数据。
如图22所示，本申请实施例提供一种移动性管理的处理结构示意图。该装置可以执行图4所示的流程中的步骤404至步骤405，以及与步骤404至步骤405相关的内容。
参见图22，该装置2200包括：
收发机2201，用于接收会话管理功能SMF网元发送的包括寻呼区域的第一消息，所述寻呼区域为所述SMF网元根据会话与业务连续性SSC模式和/或用户面功能UPF网元的服务区域确定的，所述SSC模式和/或UPF网元的服务区域为所述SMF网元根据获取到的协议数据单元PDU会话标识确定的，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；
处理器2202，用于通过所述收发机在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话标识对应的PDU会话的终端。
该装置还可以包括给各个部件供电的电源2203(比如电池)，可选的，电源2203可以通过电源管理系统与处理器2202逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
该装置还可以包括存储器2204，存储器2204可用于存储软件程序以及模块，处理器2202通过运行存储在存储器2204的软件程序以及模块，从而执行该装置的各种功能应用以及数据处理。
可选的，所述收发机2201具体用于：
向无线接入网网元发送第二消息，所述第二消息中包括寻呼区域，所述第二消息用于触发所述无线接入网网元根据所述寻呼区域寻呼所述终端。
可选的，所述第二消息中的寻呼区域用于所述无线接入网网元确定所述无线接入网网元寻呼所述终端的寻呼区域。
可选的，所述第一消息中还包括寻呼策略；
所述寻呼策略包括以下一项或多项：
寻呼次数，所述寻呼次数用于指示寻呼所述终端的次数；
寻呼周期，所述寻周期用于指示寻呼所述终端的周期；
寻呼指示信息，所述寻呼指示信息用于指示寻呼所述终端的方式。
如图23所示，本申请实施例提供一种移动性管理的处理结构示意图。该装置可以执行图7所示的流程中的步骤701至步骤702，以及与701至步骤702相关的内容。
参见图23，该装置2300包括：
收发机2301，用于接收用户面功能UPF网元发送的包括协议数据单元PDU会话标识的数据通知消息；
处理器2302，用于根据所述PDU会话标识确定所述PDU会话标识对应的会话与业务连续性SSC模式以及所述UPF网元的服务区域中的至少一项，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；
所述收发机2301，用于接入与移动性管理功能AMF网元发送第一消息，所述第一消息中包括所述SSC模式以及所述服务区域中的至少一项，所述第一消息用于触发所述AMF网元寻呼通过所述UPF网元建立所述PDU会话的终端。
该装置还可以包括给各个部件供电的电源2303(比如电池)，可选的，电源2303可以通过电源管理系统与处理器2302逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
该装置还可以包括存储器2304，存储器2304可用于存储软件程序以及模块，处理器2302通过运行存储在存储器2304的软件程序以及模块，从而执行该装置的各种功能应用以及数据处理。
可选的，所述处理器2302还用于：
启动第一定时器；
若在所述第一定时器定时超时之后，确定未收到寻呼响应，则将接收到的所述终端的下行数据包丢弃。
如图24所示，本申请实施例提供一种移动性管理的处理结构示意图。该装置可以执 行图7所示的流程中的步骤703至步骤704，以及与703至步骤704相关的内容。
参见图24，该装置2400包括：
收发机2401，用于接收会话管理功能SMF网元发送的第一消息，所述第一消息中包括会话与业务连续性SSC模式以及用户面功能UPF网元的服务区域中的至少一项，所述SSC模式以及所述服务区域为所述SMF网元根据获取到的协议数据单元PDU会话标识确定的，所述服务区域为建立所述PDU会话标识对应的PDU会话的用户面功能UPF网元的服务区域；
处理器2402，用于根据所述SSC模式以及所述服务区域中的至少一项确定寻呼区域，并在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端。
该装置还可以包括给各个部件供电的电源2403(比如电池)，可选的，电源2403可以通过电源管理系统与处理器2402逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
该装置还可以包括存储器2404，存储器2404可用于存储软件程序以及模块，处理器2402通过运行存储在存储器2404的软件程序以及模块，从而执行该装置的各种功能应用以及数据处理。
可选的，所述处理器2402具体用于：
若确定所述SSC模式为SSC模式1，则将跟踪区列表指示的区域确定为所述寻呼区域；或者
若确定所述SSC模式为SSC模式2或SSC模式3，则将所述服务区域确定为所述寻呼区域，或者将所述服务区域与跟踪区列表的重叠覆盖区域确定为所述寻呼区域。
可选的，所述收发机2401具体用于：
向无线接入网网元发送第二消息，所述第二消息中包括寻呼区域，所述第二消息用于触发所述无线接入网网元根据所述寻呼区域寻呼所述终端。
可选的，所述第二消息中还包括寻呼策略；
所述寻呼策略包括以下一项或多项：
寻呼次数，所述寻呼次数用于指示所述无线接入网网元寻呼终端的次数；
寻呼周期，所述寻周期用于指示所述无线接入网网元寻呼所述终端的周期；
寻呼指示信息，所述寻呼指示信息用于指示所述无线接入网网元寻呼终端的方式。
本申请实施例还提供了一种计算机可读存储介质，用于存储为执行上述处理器所需执行的计算机软件指令，其包含用于执行上述处理器所需执行的程序。
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、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进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (30)

  1. 一种移动性管理的处理方法，其特征在于，所述方法包括：
    会话管理功能SMF网元接收用户面功能UPF网元发送的包括协议数据单元PDU会话标识的数据通知消息，并根据所述PDU会话标识确定所述PDU会话标识对应的会话与业务连续性SSC模式和/或用户面功能UPF网元的服务区域，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；
    所述SMF网元根据所述SSC模式和/或UPF网元的服务区域确定寻呼区域；
    所述SMF网元向接入与移动性管理功能AMF网元发送包括所述寻呼区域的第一消息，所述第一消息用于触发所述AMF网元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端。
  2. 根据权利要求1所述的方法，其特征在于，所述SMF网元根据所述SSC模式和/或UPF网元的服务区域确定寻呼区域，包括：
    所述SMF网元若确定所述SSC模式为SSC模式2，则将所述服务区域作为寻呼区域；或者
    所述SMF网元若确定所述SSC模式为SSC模式1或者SSC模式3，则将跟踪区列表指示的区域作为寻呼区域；或者
    所述SMF网元根据所述跟踪区列表与UPF网元的服务区域确定寻呼区域。
  3. 根据权利要求2所述的方法，其特征在于，所述SMF网元根据跟踪区列表与UPF网元的服务区域确定寻呼区域，包括：
    所述SMF网元将所述服务区域与所述跟踪区列表指示的区域重叠的区域确定为所述寻呼区域。
  4. 根据权利要求1至3任一所述的方法，其特征在于，所述第一消息中还包括寻呼策略；
    所述寻呼策略包括以下一项或多项：
    寻呼次数，所述寻呼次数指示出所述AMF网元寻呼所述终端次数；
    寻呼周期，所述寻周期指示出所述AMF网元寻呼所述终端的周期；
    寻呼指示信息，所述寻呼指示信息指示所述AMF网元寻呼所述终端的方式。
  5. 根据权利要求1至4任一所述的方法，其特征在于，所述方法还包括：
    所述SMF网元启动第一定时器；
    所述SMF网元若在所述第一定时器定时超时之后，确定所述AMF网元未收到寻呼响应，则向所述UPF网元发送丢包指示信息，所述丢包指示信息用于指示所述UPF网元丢弃接收到所述终端的下行数据。
  6. 一种移动性管理的处理方法，其特征在于，所述方法包括：
    移动性管理功能AMF网元接收会话管理功能SMF网元发送的包括寻呼区域的第一消息，所述寻呼区域为所述SMF网元根据会话与业务连续性SSC模式和/或用户面功能UPF网元的服务区域确定的，所述SSC模式和/或UPF网元的服务区域为所述SMF网元根据获取到的协议数据单元PDU会话标识确定的，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；
    所述AMF网元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话标识对 应的PDU会话的终端。
  7. 根据权利要求6所述的方法，其特征在于，所述AMF网元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话标识对应的PDU会话的终端，包括：
    所述AMF网元向无线接入网网元发送第二消息，所述第二消息中包括寻呼区域，所述第二消息用于触发所述无线接入网网元根据所述寻呼区域寻呼所述终端。
  8. 根据权利要求7所述的方法，其特征在于，所述第二消息中的寻呼区域用于所述无线接入网网元确定所述无线接入网网元寻呼所述终端的寻呼区域。
  9. 根据权利要求6至8任一所述的方法，其特征在于，所述第一消息中还包括寻呼策略；
    所述寻呼策略包括以下一项或多项：
    寻呼次数，所述寻呼次数用于指示寻呼所述终端的次数；
    寻呼周期，所述寻周期用于指示寻呼所述终端的周期；
    寻呼指示信息，所述寻呼指示信息用于指示寻呼所述终端的方式。
  10. 一种移动性管理的处理方法，其特征在于，所述方法包括：
    会话管理功能SMF网元接收用户面功能UPF网元发送的包括协议数据单元PDU会话标识的数据通知消息，并根据所述PDU会话标识确定所述PDU会话标识对应的会话与业务连续性SSC模式以及所述UPF网元的服务区域中的至少一项，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；
    所述SMF网元向接入与移动性管理功能AMF网元发送第一消息，所述第一消息中包括所述SSC模式以及所述服务区域中的至少一项，所述第一消息用于触发所述AMF网元寻呼通过所述UPF网元建立所述PDU会话的终端。
  11. 根据权利要求10所述的方法，其特征在于，所述方法还包括：
    所述SMF网元启动第一定时器；
    所述SMF网元若在所述第一定时器定时超时之后，确定未收到寻呼响应，则将接收到的所述终端的下行数据包丢弃。
  12. 一种移动性管理的处理方法，其特征在于，所述方法包括：
    移动性管理功能AMF网元接收会话管理功能SMF网元发送的第一消息，所述第一消息中包括会话与业务连续性SSC模式以及用户面功能UPF网元的服务区域中的至少一项，所述SSC模式以及所述服务区域为所述SMF网元根据获取到的协议数据单元PDU会话标识确定的，所述服务区域为建立所述PDU会话标识对应的PDU会话的用户面功能UPF网元的服务区域；
    所述AMF网元根据所述SSC模式以及所述服务区域中的至少一项确定寻呼区域，并在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端。
  13. 根据权利要求12所述的方法，其特征在于，所述AMF网元根据所述SSC模式以及所述服务区域中的至少一项确定寻呼区域，包括：
    所述AMF网元若确定所述SSC模式为SSC模式1，则将跟踪区列表指示的区域确定为所述寻呼区域；或者
    所述AMF网元若确定所述SSC模式为SSC模式2或SSC模式3，则将所述服务区域确定为所述寻呼区域，或者将所述服务区域与跟踪区列表的重叠覆盖区域确定为所述寻呼区域。
  14. 根据权利要求12或13所述的方法，其特征在于，所述AMF网元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端，包括：
    所述AMF网元向无线接入网网元发送第二消息，所述第二消息中包括寻呼区域，所述第二消息用于触发所述无线接入网网元根据所述寻呼区域寻呼所述终端。
  15. 根据权利要求14所述的方法，其特征在于，所述第二消息中还包括寻呼策略；
    所述寻呼策略包括以下一项或多项：
    寻呼次数，所述寻呼次数用于指示所述无线接入网网元寻呼终端的次数；
    寻呼周期，所述寻周期用于指示所述无线接入网网元寻呼所述终端的周期；
    寻呼指示信息，所述寻呼指示信息用于指示所述无线接入网网元寻呼终端的方式。
  16. 一种移动性管理的处理装置，其特征在于，包括：
    收发单元，用于接收用户面功能UPF网元发送的包括协议数据单元PDU会话标识的数据通知消息，并根据所述PDU会话标识确定所述PDU会话标识对应的会话与业务连续性SSC模式和/或用户面功能UPF网元的服务区域，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；
    处理单元，用于根据所述SSC模式和/或UPF网元的服务区域确定寻呼区域；
    所述收发单元，用于向接入与移动性管理功能AMF网元发送包括所述寻呼区域的第一消息，所述第一消息用于触发所述AMF网元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端。
  17. 根据权利要求16所述的装置，其特征在于，所述处理单元具体用于：
    若确定所述SSC模式为SSC模式2，则将所述服务区域作为寻呼区域；或者
    若确定所述SSC模式为SSC模式1或者SSC模式3，则将跟踪区列表指示的区域作为寻呼区域；或者
    根据所述跟踪区列表与UPF网元的服务区域确定寻呼区域。
  18. 根据权利要求17所述的装置，其特征在于，所述处理单元具体用于：
    将所述服务区域与所述跟踪区列表指示的区域重叠的区域确定为所述寻呼区域。
  19. 根据权利要求16至18任一所述的装置，其特征在于，所述第一消息中还包括寻呼策略；
    所述寻呼策略包括以下一项或多项：
    寻呼次数，所述寻呼次数指示出所述AMF网元寻呼所述终端次数；
    寻呼周期，所述寻周期指示出所述AMF网元寻呼所述终端的周期；
    寻呼指示信息，所述寻呼指示信息指示所述AMF网元寻呼所述终端的方式。
  20. 根据权利要求16至19任一所述的装置，其特征在于，所述处理单元还用于：
    启动第一定时器；
    若在所述第一定时器定时超时之后，确定所述AMF网元未收到寻呼响应，则通过所述处理单元向所述UPF网元发送丢包指示信息，所述丢包指示信息用于指示所述UPF网元丢弃接收到所述终端的下行数据。
  21. 一种移动性管理的处理装置，其特征在于，所述装置包括：
    收发单元，用于接收会话管理功能SMF网元发送的包括寻呼区域的第一消息，所述寻呼区域为所述SMF网元根据会话与业务连续性SSC模式和/或用户面功能UPF网元的服务区域确定的，所述SSC模式和/或UPF网元的服务区域为所述SMF网元根据获取到的协 议数据单元PDU会话标识确定的，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；
    处理单元，用于通过所述收发单元在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话标识对应的PDU会话的终端。
  22. 根据权利要求21所述的装置，其特征在于，所述收发单元具体用于：
    向无线接入网网元发送第二消息，所述第二消息中包括寻呼区域，所述第二消息用于触发所述无线接入网网元根据所述寻呼区域寻呼所述终端。
  23. 根据权利要求22所述的装置，其特征在于，所述第二消息中的寻呼区域用于所述无线接入网网元确定所述无线接入网网元寻呼所述终端的寻呼区域。
  24. 根据权利要求21至23任一所述的装置，其特征在于，所述第一消息中还包括寻呼策略；
    所述寻呼策略包括以下一项或多项：
    寻呼次数，所述寻呼次数用于指示寻呼所述终端的次数；
    寻呼周期，所述寻周期用于指示寻呼所述终端的周期；
    寻呼指示信息，所述寻呼指示信息用于指示寻呼所述终端的方式。
  25. 一种移动性管理的处理装置，其特征在于，所述装置包括：
    收发单元，用于接收用户面功能UPF网元发送的包括协议数据单元PDU会话标识的数据通知消息；
    处理单元，用于根据所述PDU会话标识确定所述PDU会话标识对应的会话与业务连续性SSC模式以及所述UPF网元的服务区域中的至少一项，所述UPF网元为建立所述PDU会话标识对应的PDU会话的网元；
    所述收发单元，用于接入与移动性管理功能AMF网元发送第一消息，所述第一消息中包括所述SSC模式以及所述服务区域中的至少一项，所述第一消息用于触发所述AMF网元寻呼通过所述UPF网元建立所述PDU会话的终端。
  26. 根据权利要求25所述的装置，其特征在于，所述处理单元还用于：
    启动第一定时器；
    若在所述第一定时器定时超时之后，确定未收到寻呼响应，则将接收到的所述终端的下行数据包丢弃。
  27. 一种移动性管理的处理装置，其特征在于，所述装置包括：
    收发单元，用于接收会话管理功能SMF网元发送的第一消息，所述第一消息中包括会话与业务连续性SSC模式以及用户面功能UPF网元的服务区域中的至少一项，所述SSC模式以及所述服务区域为所述SMF网元根据获取到的协议数据单元PDU会话标识确定的，所述服务区域为建立所述PDU会话标识对应的PDU会话的用户面功能UPF网元的服务区域；
    处理单元，用于根据所述SSC模式以及所述服务区域中的至少一项确定寻呼区域，并在所述寻呼区域内寻呼通过所述UPF网元建立所述PDU会话的终端。
  28. 根据权利要求27所述的装置，其特征在于，所述处理单元具体用于：
    若确定所述SSC模式为SSC模式1，则将跟踪区列表指示的区域确定为所述寻呼区域；或者
    若确定所述SSC模式为SSC模式2或SSC模式3，则将所述服务区域确定为所述 寻呼区域，或者将所述服务区域与跟踪区列表的重叠覆盖区域确定为所述寻呼区域。
  29. 根据权利要求27或28所述的装置，其特征在于，所述收发单元具体用于：
    向无线接入网网元发送第二消息，所述第二消息中包括寻呼区域，所述第二消息用于触发所述无线接入网网元根据所述寻呼区域寻呼所述终端。
  30. 根据权利要求29所述的装置，其特征在于，所述第二消息中还包括寻呼策略；
    所述寻呼策略包括以下一项或多项：
    寻呼次数，所述寻呼次数用于指示所述无线接入网网元寻呼终端的次数；
    寻呼周期，所述寻周期用于指示所述无线接入网网元寻呼所述终端的周期；
    寻呼指示信息，所述寻呼指示信息用于指示所述无线接入网网元寻呼终端的方式。
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