WO2025232249A1 - 一种基于切片的接入和位置管理方法、装置及系统 - Google Patents

一种基于切片的接入和位置管理方法、装置及系统

Info

Publication number
WO2025232249A1
WO2025232249A1 PCT/CN2024/144318 CN2024144318W WO2025232249A1 WO 2025232249 A1 WO2025232249 A1 WO 2025232249A1 CN 2024144318 W CN2024144318 W CN 2024144318W WO 2025232249 A1 WO2025232249 A1 WO 2025232249A1
Authority
WO
WIPO (PCT)
Prior art keywords
slice
terminal
cell
base station
list
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/CN2024/144318
Other languages
English (en)
French (fr)
Inventor
夏龙根
王璐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Mobile Communications Group Co Ltd
China Mobile Group Guangdong Co Ltd
Original Assignee
China Mobile Communications Group Co Ltd
China Mobile Group Guangdong Co Ltd
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 China Mobile Communications Group Co Ltd, China Mobile Group Guangdong Co Ltd filed Critical China Mobile Communications Group Co Ltd
Publication of WO2025232249A1 publication Critical patent/WO2025232249A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/322—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by location data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration

Definitions

  • network slicing is often limited to specific areas, and base stations in non-sliced areas may not deploy slicing functionality. Because sliced terminals cannot identify whether a base station supports the required slicing capabilities, and the base station accessing the terminal does not verify or identify the terminal's slicing capabilities, when a sliced terminal moves to a non-sliced area, the services of the terminal will be disrupted because the base station does not support the required slicing capabilities.
  • This application aims to at least partially address one of the technical problems in the related art.
  • the first objective of this application is to propose a slice-based access and location management method to detect in advance network access of terminals with unsupported slice functions or terminals with illegal slice functions, thereby preventing slice terminals from residing on networks that do not support their slice functions and achieving fault avoidance for slice terminals accessing networks that do not support slice functions.
  • the third objective of this application is to propose a slice-based access and location management system.
  • a first aspect of this application proposes a slice-based access and location management method, comprising:
  • the list of base stations supported by the slice terminal is obtained;
  • the currently camped cell initiates a cell handover request.
  • the camped cell sends neighbor cell measurement and control information to the slice terminal.
  • the currently camped cell determines the target cell for handover from the base station list.
  • the location of the sliced terminal is managed according to the base station list.
  • AMF Access and Mobility Management Function
  • the step of responding to the slice terminal initiating a registration request to the slice network and obtaining a list of base stations supported by the slice terminal includes:
  • the NSSAI slice information of the network slice selection assistance information to be accessed is indicated to the base station through the RRC connection completion message.
  • the base station selects the Access and Mobility Management Function (AMF) to initiate a registration request to the slice network based on the NSSAI slice information.
  • AMF Access and Mobility Management Function
  • the AMF queries the Unified Data Management Function (UDM) for the NSSAI subscription of the slice terminal.
  • UDM Unified Data Management Function
  • the AMF queries the Network Slice Selection Function (NSSF) to find the AMF supported by the subscribed NSSAI, and determines whether the current AMF supports the subscribed NSSAI of the slice terminal.
  • NSSF Network Slice Selection Function
  • the current AMF If the current AMF supports the NSSAI subscription of the slice terminal, the current AMF sends a registration success signaling message to the slice terminal, and the registration success signaling message carries the list of base stations allowed by the slice network.
  • Optional also includes:
  • the current AMF sends a registration failure instruction to the slice terminal to terminate the registration process
  • the current AMF is redirected to the target AMF, which then sends a registration success signal to the slice terminal.
  • the target AMF supports the slice terminal's NSSAI subscription.
  • the reselection frequency, reselection priority and reselection threshold of the neighboring cells are read according to the SIB message of the camped cell.
  • the neighboring cell is reselected according to the SIB message of the camped cell, and the cell quality of the neighboring cell is evaluated according to the reselection frequency, reselection priority and reselection threshold of the neighboring cell according to the reselection criteria.
  • the neighboring cell in the base station list will be used as the target cell for reselection.
  • Optional also includes:
  • the neighboring cell with the strongest signal is selected as the target cell for reselection.
  • the currently camped cell initiates a cell handover request, the camped cell sends neighbor cell measurement and control information to the slice terminal, and after the slice terminal completes the neighbor cell measurement, the currently camped cell determines the target cell for handover from the base station list, including:
  • the slice terminal requests access to the camped cell via Radio Resource Control (RRC).
  • RRC Radio Resource Control
  • the currently residing cell checks whether it stores a list of base stations for the connected slice terminals
  • the cell where the base station is located stores the list of base stations, determine whether the signal quality of the cell where the base station is located is lower than the handover initiation threshold;
  • the neighboring cells belonging to the base station list are filtered according to the neighboring cell list configured by itself, and the neighboring cells are configured with slicing functions corresponding to the slicing terminal, and the corresponding measurement and control information is sent to the slicing terminal.
  • the slicing terminal measures the neighboring cells according to the measurement control information, generates a measurement report, and uploads the measurement report to the stationed cell;
  • the stationed cell determines the target cell for handover based on the measurement report and executes the handover procedure. It transmits the base station list to the target cell through the X2 interface.
  • the target cell belongs to the neighboring cells of the base station list.
  • Optional also includes:
  • a neighboring cell in the neighboring cell list is neither in the base station list nor configured with the corresponding slicing function of the slicing terminal, measurement and control information for all neighboring cells is sent to the slicing terminal.
  • the step of managing the location of the slice terminal according to the base station list in response to the signaling exchange between the slice terminal and the AMF includes:
  • the AMF determines the cell where the slice terminal camps based on the signaling, and the signaling carries the real-time location information (ULI) of the slice terminal.
  • UFI real-time location information
  • the AMF determines whether the cell where the sliced terminal is camped is in the base station list
  • the AMF sends a registration rejection result to the slice terminal and instructs the slice terminal to re-register;
  • the slice terminal based on the base station list, re-camps to a cell in the base station list by reselection or switching, and resends a registration request to the slice network.
  • a slice-based access and location management device comprising:
  • the mobility management module in response to a registration request initiated by a slice terminal to the slice network, is used to obtain a list of base stations supported by the slice terminal;
  • the cell reselection module if the slice terminal is in an idle state, is used to initiate a cell reselection request autonomously through the slice terminal, read the NCGI information of neighboring cells according to the System Information Block (SIB) message of the currently camped cell, and determine the target cell for reselection in the base station list.
  • SIB System Information Block
  • the handover module if the slice terminal is in an active state, is used to initiate a cell handover request through the currently camped cell.
  • the camped cell sends neighbor cell measurement and control information to the slice terminal. After the slice terminal completes the neighbor cell measurement, the currently camped cell determines the target cell for handover from the base station list.
  • the location management module in response to the signaling exchanged between the slice terminal and the AMF, manages the location of the slice terminal according to the base station list.
  • a slice-based access and location management system comprising:
  • the terminal signaling interaction module is used to realize the air interface signaling interaction between the base station and the slice terminal;
  • the AMF selection module is used to select the AMF and interact with the air interface access signaling based on the air interface access signaling of the slice terminal.
  • a mobility module is used to control the reselection and handover of the sliced terminals based on the access feedback from the AMF and the slicing function configuration of the base station;
  • the slice capability verification module is used to verify the subscribed slice capability of the slice terminal according to the access request of the slice terminal, and indicate the list of base stations that the slice terminal and the base station are allowed to camp on.
  • the location tracking module is used to determine whether the location of the slice terminal is within the slice area allowed by the network configuration based on the ULI information reported by the slice terminal, and instruct the slice terminal to start the re-registration process.
  • the network informs the terminal of the list of available base stations, restricting the sliced terminal's camping, reselection, and handover target cells. After the terminal enters a non-slice cell, it is instructed to return to the sliced network.
  • This allows for early detection of network access by terminals with unsupported sliced functions or those with illegal sliced functions, preventing sliced terminals from camping on networks that do not support their sliced functions. This achieves fault avoidance for sliced terminals accessing networks that do not support sliced functions, ensuring the establishment of PDU sessions and the normal continuation of sliced services. It also prevents service interruptions caused by sliced terminals moving to base stations that do not support sliced functions.
  • the network layer prevents sliced terminals from moving outside the permitted area, further strengthening and enhancing the service continuity and security of sliced terminals. This facilitates the flexibility and security of sliced service promotion and deployment.
  • Figure 1 is a flowchart illustrating a slice-based access and location management method according to an embodiment of this application
  • Figure 2 is a flowchart illustrating a method for obtaining a base station list according to an embodiment of this application
  • Figure 3 is a flowchart illustrating a method for determining a target cell for reselection according to an embodiment of this application
  • Figure 4 is a flowchart illustrating a method for determining a handover target cell according to an embodiment of this application
  • Figure 5 is a flowchart illustrating a network location tracking method based on a slice terminal according to an embodiment of this application
  • Figure 6 is a block diagram illustrating a slice-based access and location management device according to an embodiment of this application.
  • Figure 7 is a block diagram illustrating a slice-based access and location management system according to an embodiment of this application.
  • Figure 1 is a flowchart illustrating a slice-based access and location management method according to an embodiment of this application. As shown in Figure 1, the method includes the following steps:
  • Step 101 In response to the slice terminal initiating a registration request to the slice network, obtain the list of base stations supported by the slice terminal.
  • network slicing is a novel concept introduced in 5G networks, capable of providing differentiated services based on varying customer requests.
  • the network manages the slice types and services each terminal is eligible to use according to a Service Level Agreement (SLA).
  • SLA Service Level Agreement
  • NSSAI Network Slice Selection Assistance Information
  • S-NSSAI Single-NSSAIs
  • Each network slice is uniquely identified by its S-NSSAI, and the network provides specific network slice services based on the NSSAI subscribed to by the terminal.
  • the Access and Mobility Management Function (AMF) and other 5G Core Network (5GC) elements verify the terminal's slicing capabilities, comparing the terminal's subscribed slicing capabilities with the requested slicing capabilities, and providing signaling feedback on registration success and slicing capability verification status. If the subscribed slicing capabilities and the requested slicing capabilities do not match, the corresponding slicing capability request is rejected via a registration failure instruction field in the signaling.
  • AMF Access and Mobility Management Function
  • 5GC 5G Core Network
  • the network side informs the terminal of the supported base station list during the registration phase, and the sliced terminal only moves within the base station list indicated by the network; all base stations in the list are configured with the slicing functions required by the terminal. This restricts the terminal to always moving within the sliced network coverage area, preventing the sliced terminal from occupying base stations that do not support slicing.
  • Step 102 If the slice terminal is in an idle state, the slice terminal initiates a cell reselection request independently, reads the NCGI information of neighboring cells according to the System Information Block (SIB) message of the currently camped cell, and determines the target cell for reselection in the base station list.
  • SIB System Information Block
  • the slicing terminal determines the target cell for reselection based on the list of allowed base stations in the service area list in the registration success signaling. Cell reselection in the idle state is performed autonomously by the slicing terminal. The slicing terminal determines the target cell for reselection based on the list of allowed base stations issued by the network during initial registration. Cells outside the list of allowed base stations are not reselected. The base station also saves the list of base stations supported by the slicing terminal and performs mobility management on the slicing terminal.
  • the terminal reads the System Information Block (SIB) of the base station it is camped on, obtains information such as the measurement frequency point, reselection priority, and reselection threshold of neighboring cells, and determines whether it belongs to the cell in the list of base stations allowed by the slice based on the neighboring cell (NCGI).
  • SIB System Information Block
  • the slicing terminal only measures cells that belong to the base station list and performs cell reselection operations.
  • Step 103 If the slice terminal is in an active state, the currently camped cell initiates a cell handover request. The camped cell sends the neighbor cell measurement and control information to the slice terminal. After the slice terminal completes the neighbor cell measurement, the currently camped cell determines the target cell for handover from the base station list.
  • the slicing terminal determines the handover target cell based on the list of allowed base stations in the service area list in the registration success signaling.
  • the cell handover in the active state of the slicing terminal is jointly completed by the base station and the terminal.
  • the handover target cell is a cell in the base station list supported by the slicing terminal. Cells outside the base station list are not considered as handover candidate cells.
  • the camped cell queries the AMF for the list of allowed base stations and sends the neighbor cell measurement control message belonging to the base station list to the slice terminal.
  • the base station determines the handover target cell, which belongs to the base station list. After the handover is completed, the base station transmits the base station list to the target base station through the X2 interface.
  • Step 104 In response to the slice terminal exchanging signaling with the Access and Mobility Management Function (AMF), the location of the slice terminal is managed according to the base station list.
  • AMF Access and Mobility Management Function
  • the allowed mobile location area of the slice terminal is configured through the base station list in the 5GC network, and the AMF manages the location of the slice terminal.
  • the 5G terminal when the slice terminal exchanges signaling with the AMF, the 5G terminal carries its real-time location (UE Location Information, ULI) through the signaling and sends it to the AMF via the base station.
  • ULI UE Location Information
  • the AMF determines the real-time location of the terminal based on the ULI information reported by the slice terminal and determines whether it exceeds the allowed slice network coverage area. If it exceeds the allowed area, the terminal's registration is rejected, the slice terminal reconnects to the allowed base station, and re-initiates registration to access the network.
  • the slice-based access and location management method in this application embodiment during the initial registration phase of the slice terminal, informs the terminal of the list of available base stations, restricts the slice terminal's camping, reselection, and handover target cells, and instructs the terminal to return to the slice network after entering a non-slice cell.
  • This method can detect network access of terminals with slice functions not supported by the network or terminals with illegal slice functions in advance, preventing slice terminals from camping on networks that do not support their slice functions. This achieves fault avoidance for slice terminals accessing networks that do not support slice functions, ensures the establishment of Protocol Data Unit (PDU) sessions and the normal continuation of slice services, and avoids service interruption caused by slice terminals moving to base stations that do not support slice functions.
  • PDU Protocol Data Unit
  • the network layer avoids slice terminals moving outside the allowed area, further strengthening and improving the service continuity and security of slice terminals, and facilitating the flexibility and security of the promotion and deployment of slice services.
  • Figure 2 is a flowchart illustrating a method for obtaining a base station list according to an embodiment of this application.
  • the method may include the following steps:
  • Step 201 The slice terminal initiates a registration request to the slice network.
  • the slice terminal After the slice terminal completes the Radio Resource Control (RRC) connection, it sends the network slice selection assistance information (NSSAI) to the base station via the RRC connection completion message.
  • the base station selects the access and mobility management function (AMF) based on the NSSAI slice information and initiates a registration request to the slice network.
  • RRC Radio Resource Control
  • AMF access and mobility management function
  • the terminal can provide an NSSAI to assist the base station in selecting an AMF. If the provided NSSAI is available, the base station selects an AMF based on the NSSAI; if the provided NSSAI is unavailable or not provided, the base station selects the default AMF. Terminals that are not registering for the first time can also provide a Temp ID to assist the base station in selecting an AMF.
  • the Temp ID is an identifier assigned to the terminal by the most recently registered AMF and can uniquely identify the AMF.
  • the base station will select the AMF based on either of the provided pieces of information; if neither Temp ID nor NSSAI is valid, the base station will still accept the terminal and provide the default AMF selection. However, if the terminal accesses a base station that does not support slicing capabilities, the terminal slicing service will be unable to be carried out.
  • Step 202 AMF queries the Unified Data Management Function (UDM) for the NSSAI contract of the slice terminal.
  • UDM Unified Data Management Function
  • Step 203 Determine whether the slicing terminal is a valid slicing terminal.
  • the validity of a slice terminal is determined by comparing the signed NSSAI of the slice terminal queried in step 202 with the request NSSAI carried in the registration request in step 201.
  • Step 204 If the slice terminal is a legitimate slice terminal, determine whether the current AMF supports the slice terminal's NSSAI subscription.
  • the AMF queries the Network Slice Selection Function (NSSF) to find the AMFs supported by the NSSAI subscription, and determines whether the current AMF supports the NSSAI subscription of the slice terminal.
  • NSSF Network Slice Selection Function
  • step 205 If the current AMF does not support the NSSAI subscription for the slice terminal, proceed to step 205; otherwise, proceed to step 206.
  • Step 205 Redirect from the current AMF to the target AMF that supports the NSSAI subscription of the slice terminal, and obtain the list of base stations supported by the terminal.
  • the current AMF when the slice terminal is a legitimate slice terminal but the current AMF does not support the slice terminal's NSSAI subscription, the current AMF is redirected to the target AMF that supports the slice terminal's NSSAI subscription, and the target AMF queries the list of base stations supported by the slice terminal.
  • Step 206 The AMF sends a registration success signal to the slice terminal, which carries a list of base stations allowed by the slice network.
  • the AMF that supports NSSAI subscription for slice terminals sends a registration success signal to the slice terminal.
  • Step 207 If the slice terminal is not a valid slice terminal, the current AMF sends a registration failure instruction to the slice terminal to end the registration process.
  • the AMF issues a registration failure instruction to the slice terminal.
  • the NSSAI subscription information of the slice terminal is stored in the Unified Data Management Function (UDM), the list of base stations supported by the slice terminal is stored in the supported AMF, and the list of base stations is informed to the slice terminal during the initial registration stage of the terminal.
  • UDM Unified Data Management Function
  • Figure 3 is a flowchart illustrating a method for determining a target cell to be reselected according to an embodiment of this application.
  • the method includes the following steps:
  • Step 301 Read the reselection frequency, reselection priority and reselection threshold of neighboring cells based on the SIB message of the stationed cell.
  • the slicing terminal if the slicing terminal is in an idle state, the slicing terminal initiates a cell reselection request independently and reads information such as the reselection frequency point, reselection priority, and reselection threshold of the neighboring cells according to the SIB message of the stationed cell.
  • Step 302 Read the NCGI information of the neighboring cell based on the reselected frequency point.
  • NCGI information is used to identify NR cells globally.
  • Step 303 Determine whether the neighboring cell is a cell in the base station list supported by the slice terminal.
  • the NCGI information obtained in step 302 is used to determine whether the neighboring cell is in the list of base stations supported by the slice terminal.
  • the neighboring cell is the list of base station cells supported by the slice terminal, and step 303 is performed; otherwise, no further measurement is performed on the neighboring cell.
  • Step 304 Perform reselection measurements on neighboring cells and evaluate the cell quality of neighboring cells according to the reselection criteria.
  • the neighboring cell is reselected according to the SIB message of the camped cell, and the cell quality of the neighboring cell is evaluated according to the reselection frequency, reselection priority and reselection threshold of the neighboring cell in accordance with the reselection criteria.
  • One possible approach is to measure the signal strength and quality of neighboring cell frequencies to obtain the cell quality of neighboring cells.
  • Step 306 After determining the target cell, perform a reselection of the target cell.
  • the neighboring cell with the strongest signal and whose NCGI belongs to the list of allowed base stations is selected as the target cell for forced reselection and execution.
  • Figure 4 is a flowchart illustrating a method for determining a handover target cell according to an embodiment of this application.
  • the method includes the following steps:
  • Step 401 The slice terminal requests access to the cell it is camped on via Radio Resource Control (RRC).
  • RRC Radio Resource Control
  • Step 402 The currently residing cell checks whether it has stored a list of base stations for the connected slice terminals.
  • step 403 If the cell where the user resides stores a list of base stations, proceed to step 403; otherwise, proceed to step 408.
  • Step 403 Determine whether the signal quality of the cell to be used is lower than the handover initiation threshold.
  • step 404 is performed.
  • Step 404 The stationed cell filters neighboring cells belonging to the base station list according to its own configured neighboring cell list and sends measurement and control information to the slicing terminal.
  • the neighboring cell belongs to the base station list cell and is configured with the corresponding slicing function of the slicing terminal, the corresponding measurement and control information is sent to the slicing terminal.
  • the measurement and control information of all neighboring cells is sent to the slicing terminal.
  • Step 405 The slicing terminal measures the neighboring cells according to the measurement control information, generates a measurement report, and uploads the measurement report to the stationed cell.
  • Step 406 The stationed cell determines the target cell for handover based on the measurement report and executes the handover procedure.
  • Step 407 The stationing cell transmits the base station list to the target cell via the X2 interface.
  • the target cell is a neighboring cell of the base station list.
  • Step 408 The camping cell queries the AMF for the list of base stations supported by the slice terminal, and the corresponding AMF returns the list of base stations of the slice terminal to the camping cell.
  • step 403 is skipped and the handover process is started directly, and the user switches to the target cell that belongs to the base station list.
  • Figure 5 is a flowchart illustrating a network location tracking method based on a slice terminal according to an embodiment of this application.
  • the method includes the following steps:
  • Step 501 When the slice terminal exchanges signaling with the AMF, it carries the terminal's real-time location information ULI.
  • the signaling when the slice terminal exchanges signaling with the AMF, the signaling carries the real-time location information (ULI) of the slice terminal.
  • UMI real-time location information
  • Step 502 AMF tracks the cell where the slice terminal is camped.
  • the AMF determines the real-time location information (ULI) of the slice terminal carried in the signaling and tracks the cell where the slice terminal is stationed in real time.
  • UMI real-time location information
  • Step 503 AMF determines whether the cell where the slice terminal is camped is in the base station list.
  • the AMF determines whether the cell to be camped is in the base station list. If it exceeds the allowed base station list, step 504 is performed; otherwise, the method flow ends.
  • Step 504 AMF sends a registration rejection result to the slice terminal and instructs the slice terminal to re-register.
  • the registration rejection result gives the reason for rejection as 5GS forbidden tracking areas for regional provision of service.
  • Step 505 The sliced terminal switches to a cell in the base station list and reconnects.
  • the slicing terminal based on the base station list, re-camps to a cell in the base station list by reselection or switching, and resends a registration request to the slicing network.
  • AMF determines the cell where the slice terminal camps based on signaling, and the signaling carries the slice terminal's real-time location information ULI.
  • the AMF determines whether the cell where the sliced terminal is camped is in the base station list
  • the AMF sends a registration rejection result to the slice terminal and instructs the slice terminal to re-register.
  • the sliced terminal Based on the base station list, the sliced terminal re-camps to a cell in the base station list through reselection or handover, and resends a registration request to the sliced network.
  • the AMF determines whether the slice terminal is in the configured slice area. If it exceeds the allowed camping location, the AMF instructs the base station to register through the registration rejection result. At the same time, the slice terminal initiates a handover process based on the limited area and switches to the target cell that supports the slice function included in the base station list according to the neighboring cells defined by the camping base station.
  • the network informs the terminal of the list of available base stations, restricts the sliced terminal's camping, reselection, and target cell handover. After the terminal enters a non-slice cell, it instructs the terminal to return to the sliced network.
  • This allows for early detection of network access by terminals with unsupported sliced functions or terminals with illegal sliced functions, preventing sliced terminals from camping on networks that do not support their sliced functions. This achieves fault avoidance for sliced terminals accessing networks that do not support sliced functions, ensuring the establishment of PDU sessions and the normal continuation of sliced services. It also prevents service interruptions caused by sliced terminals moving to base stations that do not support sliced functions.
  • the network layer prevents sliced terminals from moving outside the allowed area, further strengthening and improving the service continuity and security of sliced terminals, and facilitating the flexibility and security of sliced service promotion and deployment.
  • FIG. 6 is a block diagram of a slice-based access and location management device 10 according to an embodiment of this application, including:
  • the mobility management module 100 responds to the registration request initiated by the slice terminal to the slice network to obtain a list of base stations supported by the slice terminal;
  • the cell reselection module 200 if the slice terminal is in an idle state, is used to initiate a cell reselection request autonomously through the slice terminal, read the NCGI information of neighboring cells according to the System Information Block (SIB) message of the currently camped cell, and determine the target cell for reselection in the base station list.
  • SIB System Information Block
  • the handover module 300 if the slice terminal is in an active state, is used to initiate a cell handover request through the currently camped cell.
  • the camped cell sends the measurement and control information of the neighboring cell to the slice terminal. After the slice terminal completes the neighboring cell measurement, the currently camped cell determines the target cell for handover from the base station list.
  • the location management module 400 responds to the signaling exchanged between the slice terminal and the AMF and is used to manage the location of the slice terminal according to the base station list.
  • FIG. 7 is a block diagram of a slice-based access and location management system according to an embodiment of this application, including:
  • the terminal signaling interaction module is used to realize the air interface signaling interaction between the base station and the slice terminal;
  • the AMF selection module is used to select the AMF and interact with the air interface access signaling based on the air interface access signaling of the slice terminal.
  • the mobility module is used to control the reselection and handover of sliced terminals based on the access feedback from the AMF and the slicing function configuration of the base station.
  • the slice capability verification module is used to verify the subscribed slice capability of the slice terminal according to the access request of the slice terminal, and to indicate the list of base stations that the slice terminal and the base station are allowed to camp on.
  • the location tracking module is used to determine whether the location of the slice terminal is within the slice area allowed by the network configuration based on the ULI information reported by the slice terminal, and instruct the slice terminal to start the re-registration process.
  • an access and location management system based on slices is proposed.
  • the system can realize the access network selection control, location tracking and mobility management of slice terminals, and assist terminals in selecting to reside in networks with corresponding slice capabilities to carry out slice services, thereby solving the common problem that slice terminals cannot effectively reside in networks with suitable slice capabilities.

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Abstract

本申请提出了一种基于切片的接入和位置管理方法、装置及系统，该方法包括：响应于切片终端向切片网络发起注册请求，获取切片终端支持的基站列表；由切片终端自主发起小区重选请求，在基站列表中确定重选的目标小区；由当前驻留小区发起小区切换请求，驻留小区向切片终端下发邻区的测量控制信息，在切片终端完成邻区测量后，由当前驻留小区在基站列表中确定切换的目标小区；响应于切片终端与AMF交换信令，根据基站列表对切片终端的位置进行管理。

Description

一种基于切片的接入和位置管理方法、装置及系统
相关申请的交叉引用
本申请主张在2024年5月6日在中国提交的中国专利申请No.202410550409.4的优先权，其全部内容通过引用包含于此。
技术领域
本申请涉及通信领域，尤其涉及一种基于切片的接入和位置管理方法、装置及系统。
背景技术
现有的第5代(5th Generation，5G)专网业务应用中，切片网络往往局限于特定的区域，非切片区域的基站可以不部署切片功能。由于切片终端无法识别基站是否支持所需的切片能力、终端所接入基站对终端切片能力也不做验证识别。当切片终端移动到非切片区域时，由于基站不支持终端所需的切片能力，从而造成所驻留终端业务受阻。
发明内容
本申请旨在至少在一定程度上解决相关技术中的技术问题之一。
为此，本申请的第一个目的在于提出一种基于切片的接入和位置管理方法，以能够提前发现网络不支持的切片功能终端或切片功能非法的终端的网络接入，避免切片终端驻留到不支持其切片功能的网络，实现对切片终端接入不支持切片功能的故障规避。
本申请的第二个目的在于提出一种基于切片的接入和位置管理装置。
本申请的第三个目的在于提出一种基于切片的接入和位置管理系统。
为达上述目的，本申请第一方面实施例提出了一种基于切片的接入和位置管理方法，包括：
响应于切片终端向切片网络发起注册请求，获取所述切片终端支持的基站列表；
若所述切片终端处于空闲状态，由所述切片终端自主发起小区重选请求，根据当前驻留小区的系统信息块SIB消息读取邻区的NCGI信息，在所述基站列表中确定重选的目标小区；
若所述切片终端处于激活状态，由当前驻留小区发起小区切换请求，所述驻留小区向所述切片终端下发邻区的测量控制信息，在所述切片终端完成邻区测量后，由当前所述驻留小区在所述基站列表中确定切换的目标小区；
响应于所述切片终端与接入和移动性管理功能AMF交换信令，根据所述基站列表对所述切片终端的位置进行管理。
可选的，所述响应于切片终端向切片网络发起注册请求，获取所述切片终端支持的基站列表，包括：
响应于所述切片终端完成无线资源控制RRC连接后，通过RRC连接完成消息向基站指示需要接入的网络切片选择辅助信息NSSAI切片信息，所述基站根据NSSAI切片信息选择接入和移动性管理功能AMF向所述切片网络发起注册请求；
通过所述AMF向统一数据管理功能UDM查询所述切片终端的签约NSSAI；
根据所述签约NSSAI与所述注册请求中携带的请求NSSAI，判断所述切片终端是否为合法切片终端；
若所述切片终端为合法切片终端，通过所述AMF向网络切片选择功能NSSF查询所述签约NSSAI所支持的AMF，并判断当前所述AMF是否支持所述切片终端的签约NSSAI；
若当前所述AMF支持所述切片终端的签约NSSAI，由当前所述AMF向所述切片终端下发注册成功信令，所述注册成功信令中携带有所述切片网络所允许的所述基站列表。
可选的，还包括：
若所述切片终端不为合法切片终端，由当前所述AMF向所述切片终端下发注册失败指令，结束注册环节；以及，
若所述切片终端为合法切片终端但当前所述AMF不支持所述切片终端的签约NSSAI，将当前所述AMF重新定向到目标AMF,由所述目标AMF向所述切片终端下发注册成功信令，所述目标AMF支持所述切片终端的签约NSSAI。
可选的，所述若所述切片终端处于空闲状态，由所述切片终端自主发起小区重选请求，根据当前驻留小区的系统信息块SIB消息读取邻区的NCGI信息，在所述基站列表中确定重选的目标小区，包括：
响应于所述切片终端自主发起小区重选请求，根据所述驻留小区的SIB消息读取相邻小区的重选频点、重选优先级和重选门限；
根据所述重选频点读取邻区的所述NCGI信息，根据所述NCGI信息判断所述邻区是否在所述切片终端支持的基站列表中；
若所述邻区在所述切片终端支持的基站列表中，根据所述驻留小区的SIB消息对所述邻区进行重选测量，根据所述邻区的重选频点、重选优先级和重选门限按照重选准则评估所述邻区的小区质量；
若所述邻区的小区质量满足重选准则，将在所述基站列表中的所述邻区作为重选的所述目标小区。
可选的，还包括：
对于所述基站列表中的邻区，若所有邻区的小区质量都无法满足重选准则时，选择信号最强的邻区作为重选的所述目标小区。
可选的，所述若所述切片终端处于激活状态，由当前驻留小区发起小区切换请求，所述驻留小区向所述切片终端下发邻区的测量控制信息，在所述切片终端完成邻区测量后，由当前所述驻留小区在所述基站列表中确定切换的目标小区，包括：
所述切片终端通过无线资源控制RRC请求接入所述驻留小区；
由当前所述驻留小区检查自身是否存储所接入的所述切片终端的基站列表；
若所述驻留小区存储有所述基站列表，判断所述驻留小区的信号质量是否低于切换启动门限；
若所述驻留小区的信号质量低于切换启动门限，根据自身配置的邻区列表筛选属于所述基站列表的邻区，且所述邻区配置有与所述切片终端相应的切片功能，向所述切片终端下发对应的测量控制信息；
所述切片终端根据所述测量控制信息对所述邻区进行测量，生成测量报告并上传所述测量报告给所述驻留小区；
所述驻留小区根据所述测量报告确定切换的目标小区并执行切换流程，通过X2接口将所述基站列表传递到所述目标小区，所述目标小区属于所述基站列表的邻区。
可选的，还包括：
若所述邻区列表中的邻区均未配置有与所述切片终端相应的切片功能，向所述切片终端下发全部属于所述基站列表的邻区测量控制信息；
若所述邻区列表中的邻区均不属于所述基站列表，向所述切片终端下发全部具备切片功能的邻区测量控制信息；
若所述邻区列表中的邻区即不属于所述基站列表也未配置有与所述切片终端相应的切片功能，向所述切片终端下发全部邻区的测量控制信息。
可选的，所述响应于所述切片终端与AMF交换信令，根据所述基站列表对所述切片终端的位置进行管理，包括：
当切片终端与AMF交换信令时，所述AMF根据所述信令确定所述切片终端的驻留小区，所述信令中携带有所述切片终端的实时位置信息ULI；
通过所述AMF判断所述切片终端的驻留小区是否在所述基站列表内；
若所述切片终端的驻留小区不在所述基站列表内，通过所述AMF对所述切片终端发送注册拒绝结果，并指示所述切片终端重新注册；
所述切片终端根据所述基站列表，通过重选或切换的方式重新驻留到所述基站列表中的小区，并重新向所述切片网络发送注册请求。
为达上述目的，本申请第二方面实施例提出了一种基于切片的接入和位置管理装置，包括：
移动管理模块，响应于切片终端向切片网络发起注册请求，用于获取所述切片终端支持的基站列表；
重选模块，若所述切片终端处于空闲状态，用于通过所述切片终端自主发起小区重选请求，根据当前驻留小区的系统信息块SIB消息读取邻区的NCGI信息，在所述基站列表中确定重选的目标小区；
切换模块，若所述切片终端处于激活状态，用于通过当前驻留小区发起小区切换请求，所述驻留小区向所述切片终端下发邻区的测量控制信息，在所述切片终端完成邻区测量后，由当前所述驻留小区在所述基站列表中确定切换的目标小区；
位置管理模块，响应于所述切片终端与AMF交换信令，用于根据所述基站列表对所述切片终端的位置进行管理
为达上述目的，本申请第三方面实施例提出了一种基于切片的接入和位置管理系统，包括：
上述第二方面所述的基于切片的接入和位置管理装置；
终端信令交互模块，用于实现基站对切片终端的空口信令交互；
AMF选择模块，用于根据所述切片终端的空口接入信令，实现AMF的选择与所述空口接入信令的交互；
移动性模块，用于根据AMF的接入反馈和基站的切片功能配置，控制所述切片终端的重选和切换；
切片能力校验模块，用于根据所述切片终端的接入请求，校验所述切片终端的签约切片能力，并指示所述切片终端和基站所允许驻留的基站列表；
位置追踪模块，用于根据所述切片终端上报的ULI信息，判定所述切片终端的位置是否处于网络配置的所述切片终端所允许的切片区域，并指示所述切片终端启动重注册流程。
本申请的实施例提供的技术方案至少带来以下有益效果：
在切片终端初始注册阶段，网络告知终端可用的基站列表，限制切片终端的驻留、重选和切换目标小区，在终端进入非切片小区后，指示终端返回切片网络，能够提前发现网络不支持的切片功能终端或切片功能非法的终端的网络接入，避免切片终端驻留到不支持其切片功能的网络，实现对切片终端接入不支持切片功能的故障规避，保障切片终端的PDU会话建立及切片业务的正常接续，避免切片终端因移动到不支持切片基站而造成业务中断，相对于现有技术，该方案更切合现有的协议标准，可行性更高且效果更好；除此之外，通过5GC的终端实时位置追踪管理，从网络层面规避切片终端移动到所允许区域之外，对切片终端的业务连续性和安全性进一步加固提升，便于切片业务的推广和部署的灵活性以及安全性。
本申请附加的方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
本申请上述的和/或附加的方面和优点从下面结合附图对实施例的描述中将变得明显和容易理解，其中：
图1是根据本申请实施例示出的一种基于切片的接入和位置管理方法的流程图；
图2是根据本申请实施例示出的一种获取基站列表方法的流程图；
图3是根据本申请实施例示出的一种确定重选目标小区方法的流程图；
图4是根据本申请实施例示出的一种确定切换目标小区方法的流程图；
图5是根据本申请实施例示出的一种基于切片终端的网络位置追踪方法的流程图；
图6是根据本申请实施例示出的一种基于切片的接入和位置管理装置的框图；
图7是根据本申请实施例示出的一种基于切片的接入和位置管理系统的框图。
具体实施方式
下面详细描述本申请的实施例，实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本申请，而不能理解为对本申请的限制。
下面参考附图描述本申请实施例的基于切片的接入和位置管理方法、装置及系统。
图1是根据本申请实施例示出的一种基于切片的接入和位置管理方法的流程图，如图1所示，该方法包括以下步骤：
步骤101，响应于切片终端向切片网络发起注册请求，获取切片终端支持的基站列表。
本申请实施例中，网络切片是5G网络引入的全新概念，可根据客户的不同请求提供差异化。网络根据服务等级协议(Service Level Agreement，SLA)管理每个终端有资格使用的切片类型和业务。网络切片选择辅助信息(Network Slice Selection Assistance Information，NSSAI)指示网络给终端提供的网络服务能力，包括一个或多个单NSSAI(S-NSSAI，Single-NSSAI)，每个网络切片由S-NSSAI唯一标识，网络根据终端签约的NSSAI提供特定的网络切片服务。
本申请实施例中，切片终端在向网络发起注册请求后，接入和移动性管理功能(Access and Mobility Management Function，AMF AMF)及其他5G核心网(5G Core Network，5GC)网元完成终端切片能力的校验，对比终端的签约切片能力和请求的切片能力是否相符，并通过信令反馈注册成功及切片能力校验情况。对于签约的切片能力和请求的切片能力不符的，通过信令的注册失败指令字段拒绝相应的切片能力请求。
通过本步骤，网络侧通过在注册阶段告知终端支持基站列表，切片终端仅在网络指示的基站列表移动；基站列表全部配置终端所需的切片功能。由此限制终端始终在切片网络覆盖区域内移动，避免切片终端占用到不支持切片基站的情况发生。
步骤102，若切片终端处于空闲状态，由切片终端自主发起小区重选请求，根据当前驻留小区的系统信息块(System Information Block，SIB)消息读取邻区的NCGI信息，在基站列表中确定重选的目标小区。
本申请实施例中，切片终端根据注册成功信令中的服务区域列表中所允许的基站列表确定重选目标小区，切片终端在空闲态下的小区重选由切片终端自主完成，切片终端依据初始注册时网络所下发的所允许的基站列表确定重选目标小区，对于所允许的基站列表之外的小区不重选，基站也保存切片终端支持的基站列表并对切片终端进行移动性管理。
进一步的，终端读取所驻留基站的系统信息块SIB，获取邻区的测量频点、重选优先级、重选门限等信息，并根据邻区(NCGI)判断是否属于该切片所允许的基站列表中的小区。
需要说明的是，切片终端仅对属于基站列表中的小区测量，并开展小区重选操作。
步骤103，若切片终端处于激活状态，由当前驻留小区发起小区切换请求，驻留小区向切片终端下发邻区的测量控制信息，在切片终端完成邻区测量后，由当前驻留小区在基站列表中确定切换的目标小区。
本申请实施例中，切片终端根据注册成功信令中的服务区域列表中所允许的基站列表确定切换目标小区，切片终端在激活态的小区切换由基站和终端共同完成，切换目标小区为该切片终端支持的基站列表中的小区，基站列表之外的小区不作为切换候选小区。
进一步的，由于切片终端所驻留的小区并不一定保留有切片终端所允许的基站列表，因此，切片终端在进入激活态后，驻留小区向AMF查询所允许的基站列表，并将属于基站列表的邻区测量控制消息下发切片终端，切片终端完成邻区测量后，由基站确定切换目标小区，该目标小区属于基站列表，基站在完成切换后，通过X2接口将基站列表传递到目标基站。
步骤104，响应于切片终端与接入和移动性管理功能AMF交换信令，根据基站列表对切片终端的位置进行管理。
本申请实施例中，借助5G引入的实时位置管理的机制，在5GC网络中通过基站列表配置切片终端所允许的移动位置区域，由AMF对切片终端的位置进行管理。
进一步的，当切片终端向AMF交互信令时，5G终端通过交互信令携带实时位置(UE Location Information，ULI)通过基站发送到AMF，AMF根据切片终端上报的ULI信息确定终端所处的实时位置，并判断是否超出所允许的切片网络覆盖区域，当超出所允许的区域时，则拒绝终端的注册，切片终端重新接入所允许的基站，并重新发起注册接入网络。
本申请实施例的基于切片的接入和位置管理方法，在切片终端初始注册阶段，网络告知终端可用的基站列表，限制切片终端的驻留、重选和切换目标小区，在终端进入非切片小区后，指示终端返回切片网络，能够提前发现网络不支持的切片功能终端或切片功能非法的终端的网络接入，避免切片终端驻留到不支持其切片功能的网络，实现对切片终端接入不支持切片功能的故障规避，保障切片终端的协议数据单元(Protocol Data Unit，PDU)会话建立及切片业务的正常接续，避免切片终端因移动到不支持切片基站而造成业务中断；除此之外，通过5GC的终端实时位置追踪管理，从网络层面规避切片终端移动到所允许区域之外，对切片终端的业务连续性和安全性进一步加固提升，便于切片业务的推广和部署的灵活性以及安全性。
图2是根据本申请实施例示出的一种获取基站列表方法的流程图。
如图2所示，该方法可以包括以下步骤：
步骤201，切片终端向切片网络发起注册请求。
本申请实施例中，在切片终端完成无线资源控制(Radio Resource Control，RRC)连接后，通过RRC连接完成消息向基站指示需要接入的网络切片选择辅助信息NSSAI切片信息，基站根据NSSAI切片信息选择接入和移动性管理功能AMF向切片网络发起注册请求。
本申请实施例中，终端可提供NSSAI以辅助基站选择AMF，如提供的NSSAI可用，基站根据NSSAI选择AMF；如果提供的NSSAI不可用或未提供，则基站选择默认的AMF。非首次注册的终端还可提供Temp ID来辅助基站选址AMF，Temp ID是最近一次注册AMF分配给终端的标识，可唯一标识该AMF。
对于Temp ID或者NSSAI，只要其中一项信息有效，基站依此所提供的的任意一项信息进行AMF选择；当Temp ID或者NSSAI都无效，基站依然接纳终端并提供默认的AMF选择。但当终端接入基站不支持切片能力时，将造成终端切片业务无法开展。
步骤202，AMF向统一数据管理功能UDM查询切片终端的签约NSSAI。
步骤203，判断切片终端是否为合法切片终端。
本申请实施例中，通过比较步骤202查询的切片终端的签约NSSAI与步骤201中的注册请求中携带的请求NSSAI，判断切片终端是否为合法切片终端。
其中，对于签约的切片能力和请求的切片能力不符的，跳至步骤207。
步骤204，若切片终端为合法切片终端，判断当前AMF是否支持切片终端的签约NSSAI。
本申请实施例中，通过AMF向网络切片选择功能NSSF查询签约NSSAI所支持的AMF，并判断当前AMF是否支持切片终端的签约NSSAI。
其中，如果当前AMF不支持切片终端的签约NSSAI，跳至步骤205，否则，跳至步骤206。
步骤205，由当前AMF重定向到支持切片终端签约NSSAI的目标AMF，获取终端所支持的基站列表。
本申请实施例中，当切片终端为合法切片终端但当前AMF不支持切片终端的签约NSSAI，将当前AMF重新定向到支持切片终端签约NSSAI的目标AMF,并由目标AMF查询切片终端所支持的基站列表。
步骤206，AMF向切片终端下发注册成功信令，注册成功信令中携带有切片网络所允许的基站列表。
本申请实施例中，由支持切片终端签约NSSAI的AMF向切片终端下发注册成功信令。
步骤207，若切片终端不为合法切片终端，由当前AMF向切片终端下发注册失败指令，结束注册环节。
本申请实施例中，当查询切片终端签约的切片能力和请求的切片能力不符时，AMF向切片终端下发注册失败指令。
本申请实施例中，通过上述初始注册流程，切片终端签约NSSAI信息在统一数据管理功能UDM存储，切片终端所支持的基站列表由所支持的AMF存储，基站列表在终端初始注册阶段告知切片终端。
图3是根据本申请实施例示出的一种确定重选目标小区方法的流程图。
如图3所示，该方法包括以下步骤：
步骤301，根据驻留小区的SIB消息读取相邻小区的重选频点、重选优先级和重选门限。
本申请实施例中，若切片终端处于空闲状态，由切片终端自主发起小区重选请求，根据驻留小区的SIB消息读取相邻小区的重选频点、重选优先级和重选门限等信息。
可以理解的是，重选频点、重选优先级和重选门限等信息为本领域人员公知的信息，本申请在此不做过多说明。
步骤302，根据重选频点读取邻区NCGI信息。
其中，NCGI信息用于全球识别NR小区。
步骤303，判断邻区是否为切片终端支持的基站列表小区。
本申请实施例中，通过步骤302中获取的NCGI信息来判断邻区是否在切片终端支持的基站列表中。
其中，邻区为切片终端支持的基站列表小区，进行步骤303，否则不对该邻区做后续测量。
步骤304，对邻区进行重选测量，按照重选准则评估邻区的小区质量。
本申请实施例中，若邻区在切片终端支持的基站列表中，根据驻留小区的SIB消息对邻区进行重选测量，根据邻区的重选频点、重选优先级和重选门限按照重选准则评估邻区的小区质量。
作为一种可能的实现方式，测量邻区频点的信号强度和质量来获得邻区的小区质量。
可以理解的是，重选准则根据场景的不同评判标准也不同，本申请在此不做具体限定。
步骤305，判断邻区是否满足重选准则。
其中，如果若邻区的小区质量满足重选准则，将在基站列表中的邻区作为重选的目标小区。
步骤306，在确定目标小区后，执行对该目标小区重选。
另外需要说明的是，当驻留小区不在所属切片终端所允许的基站列表中时，执行上述重选流程。
另外需要说明的是，当所有邻区的小区质量都无法满足重选准则时，选择信号最强、NCGI属于所允许基站列表的邻区作为目标小区强制重选并执行。
图4是根据本申请实施例示出的一种确定切换目标小区方法的流程图。
如图4所示，该方法包括以下步骤：
步骤401，切片终端通过无线资源控制RRC请求接入所驻留小区。
步骤402，由当前驻留小区检查自身是否存储所接入的切片终端的基站列表。
其中，如果若驻留小区存储有基站列表，进行步骤403，否则，进行步骤408。
步骤403，判断驻留小区的信号质量是否低于切换启动门限。
其中，如果驻留小区的门限低于切换启动门限，启动切换流程，进行步骤404。
步骤404，驻留小区根据自身配置的邻区列表筛选属于基站列表的邻区，向切片终端下发的测量控制信息。
需要说明的是，若邻区属于基站列表小区，且配置有与切片终端相应的切片功能，向切片终端下发对应的测量控制信息；
若邻区列表中的邻区均未配置有与切片终端相应的切片功能，向切片终端下发全部属于基站列表的邻区测量控制信息；
若邻区列表中的邻区均不属于基站列表，向切片终端下发全部具备切片功能的邻区测量控制信息；
若邻区列表中的邻区即不属于基站列表也未配置有与切片终端相应的切片功能，向切片终端下发全部邻区的测量控制信息。
步骤405，切片终端根据测量控制信息对邻区进行测量，生成测量报告并上传测量报告给驻留小区。
步骤406，驻留小区根据测量报告确定切换的目标小区并执行切换流程。
步骤407，驻留小区通过X2接口将基站列表传递到目标小区，目标小区属于基站列表的邻区。
步骤408，驻留小区向AMF查询切片终端支持的基站列表，对应AMF向驻留小区反馈切片终端的基站列表。
另外需要说明的是，若切换的目标小区所属基站属于该切片终端支持的基站列表，但实际并未配置对应的切换功能时，跳过步骤403直接启动切换流程，并切换到属于该基站列表的目标小区。
图5是根据本申请实施例示出的一种基于切片终端的网络位置追踪方法的流程图。
如图5所示，该方法包括以下步骤：
步骤501，切片终端与AMF交换信令时，携带终端的实时位置信息ULI。
本申请实施例中，切片终端与AMF交换信令时，信令中携带有切片终端的实时位置信息ULI。
步骤502，AMF跟踪切片终端的驻留小区。
本申请实施例中,AMF根据信令中确定携带的切片终端的实时位置信息ULI，实时跟踪切片终端的驻留小区。
步骤503，AMF判断切片终端的驻留小区是否在基站列表内。
本申请实施例中，由AMF判断驻留小区是否在基站列表内，当超出所允许的基站列表时，进行步骤504，否则结束本方法流程。
步骤504，AMF对切片终端发送注册拒绝结果，并指示切片终端重新注册。
一种可能的实施例中，注册拒绝结果给出的拒绝原因为5GS forbidden tracking areas for regional provision of service。
步骤505，切片终端切换到基站列表中的小区，并重新接入。
本申请实施例中，切片终端根据基站列表，通过重选或切换的方式重新驻留到基站列表中的小区，并重新向切片网络发送注册请求。
AMF根据信令确定切片终端的驻留小区，信令中携带有切片终端的实时位置信息ULI；
通过AMF判断切片终端的驻留小区是否在基站列表内；
若切片终端的驻留小区不在基站列表内，通过AMF对切片终端发送注册拒绝结果，并指示切片终端重新注册；
切片终端根据基站列表，通过重选或切换的方式重新驻留到基站列表中的小区，并重新向切片网络发送注册请求
本申请实施例中，利用ULI信息，AMF判断切片终端是否处于所配置的切片区域，若超出所允许的驻留位置，AMF通过注册拒绝结果指示基站去注册，同时，切片终端启动基于限定区域的切换流程，并依据驻留基站所定义的邻区，切换到基站列表所包含的支持切片功能的目标小区。
综上，本申请实施例在切片终端初始注册阶段，网络告知终端可用的基站列表，限制切片终端的驻留、重选和切换目标小区，在终端进入非切片小区后，指示终端返回切片网络，能够提前发现网络不支持的切片功能终端或切片功能非法的终端的网络接入，避免切片终端驻留到不支持其切片功能的网络，实现对切片终端接入不支持切片功能的故障规避，保障切片终端的PDU会话建立及切片业务的正常接续，避免切片终端因移动到不支持切片基站而造成业务中断，相对于现有技术，该方案更切合现有的协议标准，可行性更高且效果更好；除此之外，通过5GC的终端实时位置追踪管理，从网络层面规避切片终端移动到所允许区域之外，对切片终端的业务连续性和安全性进一步加固提升，便于切片业务的推广和部署的灵活性以及安全性。
图6是根据本申请实施例示出的一种基于切片的接入和位置管理装置10的框图，包括：
移动管理模块100，响应于切片终端向切片网络发起注册请求，用于获取切片终端支持的基站列表；
重选模块200，若切片终端处于空闲状态，用于通过切片终端自主发起小区重选请求，根据当前驻留小区的系统信息块SIB消息读取邻区的NCGI信息，在基站列表中确定重选的目标小区；
切换模块300，若切片终端处于激活状态，用于通过当前驻留小区发起小区切换请求，驻留小区向切片终端下发邻区的测量控制信息，在切片终端完成邻区测量后，由当前驻留小区在基站列表中确定切换的目标小区；
位置管理模块400，响应于切片终端与AMF交换信令，用于根据基站列表对切片终端的位置进行管理。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述，此处将不做详细阐述说明。
图7是根据本申请实施例示出的一种基于切片的接入和位置管理系统的框图，包括：
上述图6中所示的基于切片的接入和位置管理装置；
终端信令交互模块，用于实现基站对切片终端的空口信令交互；
AMF选择模块，用于根据切片终端的空口接入信令，实现AMF的选择与空口接入信令的交互；
移动性模块，用于根据AMF的接入反馈和基站的切片功能配置，控制切片终端的重选和切换；
切片能力校验模块，用于根据切片终端的接入请求，校验切片终端的签约切片能力，并指示切片终端和基站所允许驻留的基站列表；
位置追踪模块，用于根据切片终端上报的ULI信息，判定切片终端的位置是否处于网络配置的切片终端所允许的切片区域，并指示切片终端启动重注册流程。
本申请实施例中，通过提出基于切片的接入和位置管理系统，利用特定算力的CPU或者ASIC芯片，以及对应的软件功能模块，实现对切片终端的接入网络选择控制、切片终端的位置追踪及移动性管理，辅助终端选择驻留在具备相应切片能力的网络开展切片业务，解决切片终端不能有效驻留到合适切片能力网络的普遍性问题。
应该理解，可以使用上面所示的各种形式的流程，重新排序、增加或删除步骤。例如，本申请中记载的各步骤可以并行地执行也可以顺序地执行也可以不同的次序执行，只要能够实现本申请的技术方案所期望的结果，本文在此不进行限制。
上述具体实施方式，并不构成对本申请保护范围的限制。本领域技术人员应该明白的是，根据设计要求和其他因素，可以进行各种修改、组合、子组合和替代。任何在本申请的精神和原则之内所作的修改、等同替换和改进等，均应包含在本申请保护范围之内。

Claims (10)

  1. 一种基于切片的接入和位置管理方法，包括：
    响应于切片终端向切片网络发起注册请求，获取所述切片终端支持的基站列表；
    若所述切片终端处于空闲状态，由所述切片终端自主发起小区重选请求，根据当前驻留小区的系统信息块SIB消息读取邻区的NCGI信息，在所述基站列表中确定重选的目标小区；
    若所述切片终端处于激活状态，由当前驻留小区发起小区切换请求，所述驻留小区向所述切片终端下发邻区的测量控制信息，在所述切片终端完成邻区测量后，由当前所述驻留小区在所述基站列表中确定切换的目标小区；
    响应于所述切片终端与接入和移动性管理功能AMF交换信令，根据所述基站列表对所述切片终端的位置进行管理。
  2. 根据权利要求1所述的方法，其中，所述响应于切片终端向切片网络发起注册请求，获取所述切片终端支持的基站列表，包括：
    响应于所述切片终端完成无线资源控制RRC连接后，通过RRC连接完成消息向基站指示需要接入的网络切片选择辅助信息NSSAI切片信息，所述基站根据NSSAI切片信息选择接入和移动性管理功能AMF向所述切片网络发起注册请求；
    通过所述AMF向统一数据管理功能UDM查询所述切片终端的签约NSSAI；
    根据所述签约NSSAI与所述注册请求中携带的请求NSSAI，判断所述切片终端是否为合法切片终端；
    若所述切片终端为合法切片终端，通过所述AMF向网络切片选择功能NSSF查询所述签约NSSAI所支持的AMF，并判断当前所述AMF是否支持所述切片终端的签约NSSAI；
    若当前所述AMF支持所述切片终端的签约NSSAI，由当前所述AMF向所述切片终端下发注册成功信令，所述注册成功信令中携带有所述切片网络所允许的所述基站列表。
  3. 根据权利要求2所述的方法，还包括：
    若所述切片终端不为合法切片终端，由当前所述AMF向所述切片终端下发注册失败指令，结束注册环节；以及，
    若所述切片终端为合法切片终端但当前所述AMF不支持所述切片终端的签约NSSAI，将当前所述AMF重新定向到目标AMF,由所述目标AMF向所述切片终端下发注册成功信令，所述目标AMF支持所述切片终端的签约NSSAI。
  4. 根据权利要求1所述的方法，其中，所述若所述切片终端处于空闲状态，由所述切片终端自主发起小区重选请求，根据当前驻留小区的系统信息块SIB消息读取邻区的NCGI信息，在所述基站列表中确定重选的目标小区，包括：
    响应于所述切片终端自主发起小区重选请求，根据所述驻留小区的SIB消息读取相邻小区的重选频点、重选优先级和重选门限；
    根据所述重选频点读取邻区的所述NCGI信息，根据所述NCGI信息判断所述邻区是否在所述切片终端支持的基站列表中；
    若所述邻区在所述切片终端支持的基站列表中，根据所述驻留小区的SIB消息对所述邻区进行重选测量，根据所述邻区的重选频点、重选优先级和重选门限按照重选准则评估所述邻区的小区质量；
    若所述邻区的小区质量满足重选准则，将在所述基站列表中的所述邻区作为重选的所述目标小区。
  5. 根据权利要求4所述的方法，还包括：
    对于所述基站列表中的邻区，若所有邻区的小区质量都无法满足重选准则时，选择信号最强的邻区作为重选的所述目标小区。
  6. 根据权利要求1所述的方法，其中，所述若所述切片终端处于激活状态，由当前驻留小区发起小区切换请求，所述驻留小区向所述切片终端下发邻区的测量控制信息，在所述切片终端完成邻区测量后，由当前所述驻留小区在所述基站列表中确定切换的目标小区，包括：
    所述切片终端通过无线资源控制RRC请求接入所述驻留小区；
    由当前所述驻留小区检查自身是否存储所接入的所述切片终端的基站列表；
    若所述驻留小区存储有所述基站列表，判断所述驻留小区的信号质量是否低于切换启动门限；
    若所述驻留小区的信号质量低于切换启动门限，根据自身配置的邻区列表筛选属于所述基站列表的邻区，且所述邻区配置有与所述切片终端相应的切片功能，向所述切片终端下发对应的测量控制信息；
    所述切片终端根据所述测量控制信息对所述邻区进行测量，生成测量报告并上传所述测量报告给所述驻留小区；
    所述驻留小区根据所述测量报告确定切换的目标小区并执行切换流程，通过X2接口将所述基站列表传递到所述目标小区，所述目标小区属于所述基站列表的邻区。
  7. 根据权利要求6所述的方法，还包括：
    若所述邻区列表中的邻区均未配置有与所述切片终端相应的切片功能，向所述切片终端下发全部属于所述基站列表的邻区测量控制信息；
    若所述邻区列表中的邻区均不属于所述基站列表，向所述切片终端下发全部具备切片功能的邻区测量控制信息；
    若所述邻区列表中的邻区即不属于所述基站列表也未配置有与所述切片终端相应的切片功能，向所述切片终端下发全部邻区的测量控制信息。
  8. 根据权利要求1所述的方法，其中，所述响应于所述切片终端与AMF交换信令，根据所述基站列表对所述切片终端的位置进行管理，包括：
    当切片终端与AMF交换信令时，所述AMF根据所述信令确定所述切片终端的驻留小区，所述信令中携带有所述切片终端的实时位置信息ULI；
    通过所述AMF判断所述切片终端的驻留小区是否在所述基站列表内；
    若所述切片终端的驻留小区不在所述基站列表内，通过所述AMF对所述切片终端发送注册拒绝结果，并指示所述切片终端重新注册；
    所述切片终端根据所述基站列表，通过重选或切换的方式重新驻留到所述基站列表中的小区，并重新向所述切片网络发送注册请求。
  9. 一种基于切片的接入和位置管理装置，包括：
    移动管理模块，响应于切片终端向切片网络发起注册请求，用于获取所述切片终端支持的基站列表；
    重选模块，若所述切片终端处于空闲状态，用于通过所述切片终端自主发起小区重选请求，根据当前驻留小区的系统信息块SIB消息读取邻区的NCGI信息，在所述基站列表中确定重选的目标小区；
    切换模块，若所述切片终端处于激活状态，用于通过当前驻留小区发起小区切换请求，所述驻留小区向所述切片终端下发邻区的测量控制信息，在所述切片终端完成邻区测量后，由当前所述驻留小区在所述基站列表中确定切换的目标小区；
    位置管理模块，响应于所述切片终端与AMF交换信令，用于根据所述基站列表对所述切片终端的位置进行管理。
  10. 一种基于切片的接入和位置管理系统，包括：
    权利要求9所述的基于切片的接入和位置管理装置；
    终端信令交互模块，用于实现基站对切片终端的空口信令交互；
    AMF选择模块，用于根据所述切片终端的空口接入信令，实现AMF的选择与所述空口接入信令的交互；
    移动性模块，用于根据AMF的接入反馈和基站的切片功能配置，控制所述切片终端的重选和切换；
    切片能力校验模块，用于根据所述切片终端的接入请求，校验所述切片终端的签约切片能力，并指示所述切片终端和基站所允许驻留的基站列表；
    位置追踪模块，用于根据所述切片终端上报的ULI信息，判定所述切片终端的位置是否处于网络配置的所述切片终端所允许的切片区域，并指示所述切片终端启动重注册流程。
PCT/CN2024/144318 2024-05-06 2024-12-31 一种基于切片的接入和位置管理方法、装置及系统 Pending WO2025232249A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111149387A (zh) * 2019-10-21 2020-05-12 北京小米移动软件有限公司 小区重选方法及装置、通信设备
CN114828106A (zh) * 2021-01-18 2022-07-29 中国电信股份有限公司 用于实现移动性管理的方法和用户终端
CN114982283A (zh) * 2020-01-13 2022-08-30 Oppo广东移动通信有限公司 无线通信方法、终端设备和网络设备
CN116456402A (zh) * 2022-01-07 2023-07-18 大唐移动通信设备有限公司 小区重选方法、切片组信息处理方法、终端及网络侧设备
CN118804157A (zh) * 2024-05-06 2024-10-18 中国移动通信集团广东有限公司 一种基于切片的接入和位置管理方法、装置及系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111149387A (zh) * 2019-10-21 2020-05-12 北京小米移动软件有限公司 小区重选方法及装置、通信设备
CN114982283A (zh) * 2020-01-13 2022-08-30 Oppo广东移动通信有限公司 无线通信方法、终端设备和网络设备
CN114828106A (zh) * 2021-01-18 2022-07-29 中国电信股份有限公司 用于实现移动性管理的方法和用户终端
CN116456402A (zh) * 2022-01-07 2023-07-18 大唐移动通信设备有限公司 小区重选方法、切片组信息处理方法、终端及网络侧设备
CN118804157A (zh) * 2024-05-06 2024-10-18 中国移动通信集团广东有限公司 一种基于切片的接入和位置管理方法、装置及系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZTE CORPORATION, SANECHIPS: "Consideration on slice specific cell selection and reselection", 3GPP DRAFT; R2-2009807, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Electronic; 20201102 - 20201113, 23 October 2020 (2020-10-23), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051942622 *

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