WO2021159282A1 - 指示信息发送方法、网络设备、通信装置和核心网设备 - Google Patents

指示信息发送方法、网络设备、通信装置和核心网设备 Download PDF

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Publication number
WO2021159282A1
WO2021159282A1 PCT/CN2020/074771 CN2020074771W WO2021159282A1 WO 2021159282 A1 WO2021159282 A1 WO 2021159282A1 CN 2020074771 W CN2020074771 W CN 2020074771W WO 2021159282 A1 WO2021159282 A1 WO 2021159282A1
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WIPO (PCT)
Prior art keywords
cell
indication information
network device
communication device
cag
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PCT/CN2020/074771
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English (en)
French (fr)
Inventor
谭佳瑶
刘俊
强鹂
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2020/074771 priority Critical patent/WO2021159282A1/zh
Priority to CN202080095389.6A priority patent/CN115039427A/zh
Publication of WO2021159282A1 publication Critical patent/WO2021159282A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security

Definitions

  • This application relates to the field of communications, and in particular to a method for sending indication information, network equipment, communication device, and core network equipment.
  • NPN non-public network
  • a closed access group (CAG) cell and a public land mobile network (PLMN) cell can be divided in the form of slicing, where the CAG cell supplies the terminal equipment (NPN-UE) belonging to the NPN Access system, the PLMN cell provides terminal equipment (non-NPN-UE) that does not belong to the NPN access to the system.
  • CAG closed access group
  • PLMN public land mobile network
  • the access of the terminal equipment will not be restricted.
  • the terminal equipment can Access to the system through the CAG cell can also access the system through the PLMN cell, which will affect the security of the NPN service.
  • the embodiment of the application provides a method for sending indication information, network equipment, communication device, and core network equipment, which are used to control the terminal equipment that supports CAG access and PLMN access at the same time to access the CAG cell or access the PLMN. Community.
  • a method for sending instruction information including: a first network device receives first instruction information, where the first instruction information is used to instruct to configure second instruction information for the terminal device, and the second instruction information is used to indicate The terminal equipment only accesses the system through the closed access group CAG cell or only through the public land mobile network PLMN cell.
  • the first network device sends second indication information to the terminal device.
  • the first network device receives the first instruction information, where the first instruction information is used to indicate whether to configure the second instruction information for the terminal device, and the second instruction information instructs the terminal device to only pass CAG cell access to the system, or access to the system only through the PLMN cell.
  • the first network device sends the second indication information to the terminal device, so that the terminal device can access the system through the CAG cell or through the PLMN cell in response to the second indication information.
  • the first network device restricts the access of the terminal device that supports both CAG access and PLMN access, thereby controlling the terminal device to access the CAG cell or access the PLMN cell.
  • the first network device receiving the first indication information includes: the first network device receives the first indication information from the terminal device. That is, the terminal device actively requests to configure the second indication information.
  • the first network device receiving the first indication information includes: the first network device receives the first indication information from the second network device.
  • the second network device may be a last serving (last serving) network device.
  • the first network device receiving the first indication information includes: the first network device receives the first indication information from the core network device. That is, the core network device actively instructs the network device to configure the second indication information for the terminal device.
  • the method further includes: the first network device determines the second indication information according to the measurement report from the terminal device, or the measurement report and the allowed CAG list, where the measurement report at least includes the identity of the serving cell , And, the identification and measurement result of the neighboring cell; the allowed CAG list includes the identification of the CAG cell that the terminal device is allowed to access. That is, the network device may determine the second indication information according to the measurement report of the terminal device.
  • the first network device determines the second indication information according to the measurement report from the terminal device, or the measurement report and the allowed CAG list, including: the first network device determines that the serving cell is according to the identity of the serving cell PLMN cell; the first network device determines that the neighbor cell includes at least one CAG cell according to the identity of the neighbor cell; the first network device determines that the measurement result of the at least one CAG cell is higher than the first threshold, and the identity of the at least one CAG cell belongs to the allowed CAG list , Determining that the second indication information indicates that the terminal device only accesses the system through the CAG cell.
  • the terminal device switches from the PLMN cell to the CAG cell, the communication quality of the CAG cell is required to meet the communication requirements, and the identity of the CAG cell should belong to the allowed CAG list.
  • the measurement report further includes the measurement result of the serving cell
  • the first network device determines the second indication information according to the measurement report from the terminal device, or the measurement report and the allowed CAG list, including: the first network The device determines that the serving cell is a CAG cell according to the identity of the serving cell; the first network device determines that the neighboring cells only include PLMN cells according to the identity of the neighboring cell; the first network device determines that the measurement result of the PLMN cell is higher than the second threshold according to the measurement of the serving cell The result is lower than the third threshold, and it is determined that the second indication information indicates that the terminal device only accesses the system through the PLMN cell.
  • the terminal equipment switches from the CAG cell to the PLMN cell, the conditions are relatively harsh, which not only requires poor communication quality in the CAG cell, but also requires good communication quality in the PLMN cell.
  • the first indication information is stored in the context of the terminal device.
  • the first indication information when the terminal device is in an inactive state, the first indication information is stored in the inactive access stratum context of the terminal device.
  • the storage location of the first indication information is different.
  • the first indication information when the terminal device is in the connected state, the first indication information is stored in the access layer context of the terminal device.
  • the storage location of the first indication information is different.
  • a method for sending indication information including: receiving second indication information from a first network device, where the second indication information is used to instruct a terminal device to access the system only through a CAG cell or only through a PLMN cell ; In response to the second indication information, access the system through the CAG cell or access the system through the PLMN cell.
  • the first network device receives the first instruction information, where the first instruction information is used to indicate whether to configure the second instruction information for the terminal device, and the second instruction information instructs the terminal device to only pass CAG cell access to the system, or access to the system only through the PLMN cell.
  • the first network device sends the second indication information to the terminal device, so that the terminal device can access the system through the CAG cell or the PLMN cell in response to the second indication information.
  • the first network device restricts the access of the terminal device that supports both CAG access and PLMN access, thereby controlling the terminal device to access the CAG cell or access the PLMN cell.
  • the method further includes: sending first instruction information to the first network device, where the first instruction information is used to instruct to configure the second instruction information for the terminal device. That is, the terminal device actively requests to configure the second indication information.
  • the method further includes: sending a measurement report to the first network device, where the measurement report includes at least the identity of the serving cell, and the identity and measurement result of the neighboring cell, the serving cell is a PLMN cell,
  • the neighbor cell includes at least one CAG cell, or the serving cell is a CAG cell, and the neighbor cell includes only a PLMN cell.
  • the measurement report can be used by the network device to determine the second indication information.
  • the measurement report also includes the measurement result of the serving cell.
  • the first indication information is stored in the context of the terminal device.
  • the first indication information when the terminal device is in an inactive state, the first indication information is stored in the inactive access stratum context of the terminal device.
  • the storage location of the first indication information is different.
  • the first indication information when the terminal device is in the connected state, the first indication information is stored in the access layer context of the terminal device.
  • the storage location of the first indication information is different.
  • a method for sending instruction information including: a core network device determines first instruction information, where the first instruction information is used to instruct to configure second instruction information for the terminal device, and the second instruction information is used to instruct the terminal
  • the device accesses the system only through the closed access group CAG cell or only through the public land mobile network PLMN cell; the core network device sends the first indication information to the first network device.
  • the core network device actively instructs the network device to configure the second instruction information for the terminal device.
  • the terminal device can respond to the second indication information to access the system through the CAG cell or through the PLMN cell.
  • the first network device restricts the access of the terminal device that supports both CAG access and PLMN access, thereby controlling the terminal device to access the CAG cell or access the PLMN cell.
  • a first network device including: a transceiver module, configured to receive first indication information, where the first indication information is used to instruct to configure second indication information for the terminal device, and the second indication information is used to Instruct the terminal equipment to access the system only through the closed access group CAG cell or only through the public land mobile network PLMN cell; the transceiver module is also used to send second indication information to the terminal equipment in response to the first indication information.
  • the transceiver module is specifically configured to: receive the first indication information from the terminal device.
  • the transceiver module is specifically configured to: receive the first indication information from the second network device.
  • the transceiver module is specifically configured to: receive the first indication information from the core network device.
  • the first network device further includes a processing module, configured to determine the second indication information according to the measurement report from the terminal device, or the measurement report and the allowed CAG list, where the measurement report includes at least the serving cell The identification of the neighbor cell and the measurement result; the allowed CAG list includes the identification of the CAG cell that the terminal device is allowed to access.
  • the processing module is specifically configured to: determine that the serving cell is a PLMN cell according to the identity of the serving cell; determine that the neighbor cell includes at least one CAG cell according to the identity of the neighbor cell; At the first threshold, and the identity of at least one CAG cell belongs to the allowed CAG list, it is determined that the second indication information indicates that the terminal device only accesses the system through the CAG cell.
  • the measurement report further includes the measurement result of the serving cell
  • the processing module is specifically configured to: determine that the serving cell is a CAG cell according to the identity of the serving cell; determine that the neighbor cell only includes the PLMN cell according to the identity of the neighbor cell; According to the measurement result of the PLMN cell being higher than the second threshold and the measurement result of the serving cell being lower than the third threshold, it is determined that the second indication information indicates that the terminal device only accesses the system through the PLMN cell.
  • the first indication information is stored in the context of the terminal device.
  • the first indication information is stored in the inactive access stratum context of the terminal device.
  • the first indication information is stored in the access layer context of the terminal device.
  • a terminal device including: a transceiver module, configured to receive second indication information from a first network device, the second indication information being used to instruct the terminal device to access the system only through the CAG cell or only through the PLMN cell Access system; a processing module for responding to the second indication information to access the system through the CAG cell or access the system through the PLMN cell.
  • the transceiver module is further configured to: send first instruction information to the first network device, where the first instruction information is used to instruct to configure the second instruction information for the terminal device.
  • the transceiver module is further configured to: send a measurement report to the first network device, where the measurement report includes at least the identity of the serving cell, and the identity and measurement results of the neighboring cell, and the serving cell is a PLMN cell ,
  • the neighbor cell includes at least one CAG cell, or the serving cell is a CAG cell, and the neighbor cell only includes a PLMN cell.
  • the measurement report also includes the measurement result of the serving cell.
  • the first indication information is stored in the context of the terminal device.
  • the first indication information is stored in the inactive access stratum context of the terminal device.
  • the first indication information is stored in the access layer context of the terminal device.
  • a core network device including: a processing module, configured to determine first indication information, where the first indication information is used to instruct to configure second indication information for the terminal device, and the second indication information is used to indicate
  • the terminal device accesses the system only through the closed access group CAG cell or only through the public land mobile network PLMN cell; the transceiver module is used to send the first indication information to the first network device.
  • a communication device including a processor, the processor is connected to a memory, the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the device executes the first aspect and any of the same.
  • the method according to one embodiment.
  • a communication device including a processor, the processor is connected to a memory, the memory is configured to store a computer program, and the processor is configured to execute the computer program stored in the memory to enable The device executes the method described in the second aspect and any one of its implementation manners.
  • a communication device including a processor, the processor is connected to a memory, the memory is configured to store a computer program, and the processor is configured to execute the computer program stored in the memory to enable The device executes the method described in the third aspect and any one of its implementation manners.
  • a computer-readable storage medium stores a computer program.
  • the computer program When the computer program is executed, the computer program described in the first aspect and any one of the embodiments thereof is implemented. method.
  • a computer-readable storage medium stores a computer program, and when the computer program is executed, the method according to the second aspect and any one of the embodiments thereof is implemented .
  • a computer-readable storage medium stores a computer program.
  • the computer program can implement the method described in the third aspect and any one of the embodiments thereof. Methods.
  • a communication system including the first network device according to the fourth aspect and any one thereof, the terminal device according to the fifth aspect or any one thereof, and the sixth aspect And the core network equipment described in any one of them.
  • FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of this application.
  • FIG. 2 is a schematic flow chart 1 of a method for sending indication information provided by an embodiment of this application;
  • FIG. 3 is a second schematic flowchart of a method for sending indication information provided by an embodiment of this application.
  • FIG. 4 is a third schematic flowchart of a method for sending indication information according to an embodiment of this application.
  • FIG. 5 is a fourth schematic flowchart of a method for sending indication information according to an embodiment of this application.
  • FIG. 6 is a fifth schematic flowchart of a method for sending indication information according to an embodiment of this application.
  • FIG. 7 is a sixth flowchart of a method for sending indication information according to an embodiment of this application.
  • FIG. 8 is a seventh flowchart of a method for sending indication information according to an embodiment of this application.
  • FIG. 9 is a first schematic structural diagram of a first network device according to an embodiment of this application.
  • FIG. 10 is a second schematic structural diagram of a first network device provided by an embodiment of this application.
  • FIG. 11 is a first structural diagram of a terminal device according to an embodiment of the application.
  • FIG. 12 is a second schematic structural diagram of a terminal device provided by an embodiment of this application.
  • FIG. 13 is a first structural diagram of a core network device provided by an embodiment of this application.
  • FIG. 14 is a second structural diagram of a core network device provided by an embodiment of this application.
  • 15 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 16 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 17 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • LTE long term evolution
  • UMTS universal mobile telecommunications system
  • UTRAN Universal Mobile telecommunications system
  • GSM global system for mobile communication
  • EDGE enhanced data rate for GSM evolution
  • GSM EDGE radio access network GSM EDGE radio access network
  • GERAN GSM EDGE radio access network
  • the function of the MME is completed by the serving general packet radio service (GPRS) support node (serving GPRS support, SGSN), and the function of the SGW ⁇ PGW is performed by the gateway GPRS support node (gateway GPRS).
  • GPRS general packet radio service
  • GGSN support node
  • PLMN public land mobile network
  • 5G 5th generation
  • the embodiment of the present application relates to a terminal device.
  • the terminal device can be a device that includes wireless transceiver functions and can cooperate with network devices to provide users with communication services.
  • terminal equipment may refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication device, User agent or user device.
  • UE user equipment
  • the terminal device can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and a wireless Handheld devices with communication functions, computing devices or other processing devices connected to wireless modems, robots, drones, smart driving vehicles, household appliances, in-vehicle equipment, medical equipment, smart logistics equipment, wearable devices, future 5G networks or 5G
  • the terminal devices in the subsequent network, etc. are not limited in this embodiment of the present application.
  • the network equipment involved in the embodiments of the present application may also be referred to as a radio access network (RAN) equipment.
  • the RAN equipment is connected to the terminal equipment and is used to receive data from the terminal equipment and send it to the core network equipment.
  • RAN equipment corresponds to different equipment in different communication systems, for example, it corresponds to base station and base station controller in 2G system, corresponds to base station and radio network controller (RNC) in 3G system, and corresponds to evolution in 4G system
  • An evolutional node B (eNB) corresponds to a 5G system in a 5G system, such as an access network device (such as gNB, CU, and DU) in a new radio access technology (NR).
  • the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network side device in a future 5G network or a network after 5G, or a network device in a future evolved PLMN network, etc.
  • CN equipment corresponds to different equipment in different communication systems.
  • core network core network
  • CN equipment corresponds to different equipment in different communication systems.
  • a serving GPRS support node serving GPRS support node, SGSN
  • a gateway GPRS support node gatewayway GPRS support node, GGSN.
  • MME mobility management entity
  • S-GW serving gateway
  • 5G system it corresponds to a 5G system's core network related equipment (such as NG-Core).
  • a radio resource control (RRC) connection is established between the terminal device and the RAN device, and the connection between the terminal device and the core network device has also been established. If there is data to be transmitted, it can be directly passed The established connection is complete.
  • the RAN device saves the context information of the terminal device and can perform cell handover based on RAN device control.
  • the connection with the core network device is not established. If there is data to be transmitted, the connection with the RAN device and the core network device needs to be established first.
  • the RAN device releases the context information of the terminal device, and the terminal device can perform cell-based reselection.
  • the inactive state can also be called a light connection state, a suspend state, a deactivated state, a low-overhead state, and so on.
  • the RRC connection between the terminal device and the RAN device can be restored through a resume message.
  • the data radio bearer (data radio bearer) between the terminal device and the RAN device can also be restored. bearer, DRB).
  • the S1 interface of the terminal device will be anchored to a RAN device (can be called an anchor RAN device), and then it can perform cell reselection mobility in a predetermined area (for example, called "RAN-based notification area"). ", or "radio access network area”) when moving within the anchor point RAN equipment, and once out of the RAN-based notification area (RNA), you need to notify the anchor point RAN equipment For its location, this process is called RAN-based notification area update.
  • the "inactive state” mentioned in the embodiments of the present application is only used to describe this state, and is not intended to be any limitation.
  • the terminal device can perform cell-based reselection operations.
  • the connection information of the terminal device is stored in the anchor RAN device.
  • the connection information of the terminal device includes the context information of the terminal device and the core network connection.
  • Context information After the RAN device establishes an RRC connection with the terminal device, the RAN device saves the context information of the terminal device, and the RAN device communicates with the terminal device based on the context information.
  • the context information includes identification information of the terminal device, security context information of the terminal device, subscription information of the terminal device, configuration information of the radio bearer of the terminal device, logical channel information, and network slicing information (network slicing info).
  • the identifier of the terminal device indicates an identifier that can uniquely identify the terminal device, and may be an identifier assigned by the RAN device to the terminal device, or an identifier assigned by the core network device for the terminal device.
  • FIG. 1 is a schematic diagram of the architecture of a communication system according to an embodiment of the application. Including: terminal equipment 101, network equipment 102 and core network equipment 103.
  • the terminal device 101 and the network device 102 are connected wirelessly, the network device 102 and the network device 102 are connected through an Xn interface, and the network device 102 and the core network device 103 are connected through an NG interface.
  • the network device 102 may also be referred to as a next generation radio access network (NG-RAN), where the NG-RAN includes a gNB and a next generation evolutional node B (ng-eNB).
  • NG-RAN next generation radio access network
  • ng-eNB next generation evolutional node B
  • the ng-eNB can directly communicate with the terminal device 101 to provide E-UTRA user plane and control plane connections for the terminal device 101.
  • the gNB can communicate with the terminal device 101 indirectly (for example, through an ng-eNB) to provide the terminal device 101 with NR user plane and control plane connections.
  • the core network equipment 103 may be called a 5G core network (5GC), which may include access and mobility management function (AMF) equipment, used for mobility management in the mobile network, such as user location update, user Register network, user switching, etc.
  • 5GC 5G core network
  • AMF access and mobility management function
  • the terminal device 101 After the terminal device 101 initially establishes an RRC connection with the network device 102, the terminal device 101 enters the connected state. In the connected state, the network device 102 saves the context information of the terminal device 101, and the terminal device 101 communicates with the network device 102 based on the RRC connection, for example, accesses the core network device 103 through the network device 102.
  • the terminal device 101 can disconnect the RRC connection with the network device 102, or the network device 102 can disconnect the RRC connection with the terminal device 101, but the network device 102 retains the context information of the terminal device 101, and the terminal device 101 enters Inactive state.
  • NPN non-public networks
  • 3GPP TS23.501 there are two types of non-public networks:
  • Standalone NPN Standalone NPN of independent networking. This network does not depend on the PLMN network and is operated by an SNPN operator.
  • Non-independent network NPN Public network integrated NPN
  • PLMN Public network integrated NPN
  • the NPN established based on the foregoing communication system architecture belongs to the NPN of non-independent networking.
  • CAG cells can be divided into slices, where the CAG cells are used for terminal equipment (NPN-UE) belonging to the NPN to access the system and provide NPN services.
  • the remaining PLMN cells are for terminal equipment (non-NPN-UE) not belonging to the NPN to access the system and provide PLMN services.
  • the NPN service may also be referred to as the CAG service, and the CAG service is used for description below.
  • the terminal equipment can be configured with the following CAG information:
  • Allowed CAG list includes the identification (CAG ID) of the CAG cell that the terminal device is allowed to access.
  • the CAG ID is used in the PLMN ID to uniquely identify the CAG cell.
  • Each PLMN can have multiple CAG IDs.
  • Each cell can support multiple PLMNs, so all supported PLMNs and the CAG ID corresponding to each PLMN will be broadcast when the cell broadcasts.
  • CAG-only indication whether to allow only terminal equipment to access the system through the CAG cell.
  • CAG-only cell can also be referred to as a CAG cell, which can only provide CAG services to terminal devices.
  • a PLMN-only cell can also be called a PLMN cell, which can only provide PLMN services to terminal devices.
  • CAG and PLMN cells (CAG+PLMN cell) can provide CAG services and PLMN services to terminal equipment.
  • CAG-only UE refers to a terminal device that has a non-empty CAG list (allowed CAG list) and is configured with CAG-only indication information.
  • PLMN-only UE refers to a terminal device that is empty or has no allowed CAG list configured, and no CAG indication information only is configured.
  • CAG and PLMN terminal equipment (CAG+PLMN UE) refer to the terminal equipment that allows the CAG list to be non-empty and is not configured with only CAG indication information.
  • the terminal equipment For CAG and PLMN terminal equipment, if the terminal equipment is configured with only CAG indication information, the terminal equipment can only access the system through the CAG cell, and cannot access the system through the PLMN cell. If the terminal device is not configured with only CAG indication information and the CAG list is allowed to be non-empty, the terminal device can access the system through the CAG cell or the PLMN cell.
  • the terminal equipment for terminal equipment that supports both CAG cell access to the system or PLMN cell access to the system, if it can be covered by both the CAG cell and the PLMN cell, the terminal equipment’s access will not be restricted.
  • the terminal device can access the system through the CAG cell or the PLMN cell, which will affect the security of the NPN service.
  • the first network device may receive first instruction information from the core network device, the second network device, and the terminal device.
  • the first instruction information is used to indicate whether the terminal device needs to be configured with the second instruction information. Instructions.
  • the first network device sends second indication information to the terminal device.
  • the second indication information indicates that the terminal device only accesses the system through the CAG cell, or only accesses the system through the PLMN cell.
  • FIG. 2 is a schematic flowchart of a method for sending indication information according to an embodiment of the application.
  • the terminal device, the network device (the first network device and the second network device), and the core network device described in FIG. 2 may correspond to the terminal device 101, the network device 102, and the core network device 103 shown in FIG. 1, respectively.
  • the instruction information sending method includes S201-S203:
  • the first network device receives first indication information.
  • the first indication information is used to indicate whether to configure the second indication information for the terminal device.
  • the first indication information may be a type of terminal equipment newly defined in the context of the terminal equipment (for example, UE context).
  • the first indication information may occupy 1 bit, and when the value is 1 (TRUE), it means that it is required Configure the second indication information for the terminal device.
  • TRUE When the value is 0 (FALSE), it means that it is not necessary to configure the second indication information for the terminal device.
  • FALSE FALSE
  • the value is 1 (TRUE) it means that it is not necessary to configure the second indication information for the terminal device.
  • the terminal device supports access to the system through a CAG cell and access to the system through a PLMN cell.
  • the type of the cell that the terminal device attempts to access can be a CAG cell or a PLMN cell.
  • the system may be a 5G system.
  • the second indication information is used to instruct the terminal device to access the system only through the CAG cell or access the system only through the PLMN cell.
  • the second indication information may be defined as a temporary CAG-only indication.
  • the value is TRUE, it instructs the terminal device to access the system only through the CAG cell
  • the value is FALSE, it instructs the terminal device to only access the system through the CAG cell.
  • the PLMN cell accesses the system.
  • the first network device does not configure the second indication information for the terminal device, it may be equivalent to the value FALSE, that is, it is equivalent to the second indication information indicating that the terminal device only accesses the system through the PLMN cell.
  • the first indication information may be stored in the context of the terminal device.
  • the first indication information is stored in the inactive state access layer context (UE INACTIVE AS context) of the terminal device.
  • the first indication information is stored in the access layer context (UE AS context) of the terminal device.
  • the first network device may receive the first indication information in at least one of the following ways:
  • a core network device may determine the first indication information, and send the first indication information to the first network device.
  • the first network device may obtain the first indication information from the core network device.
  • the first indication information may be stored in the context of the terminal device in the core network device, and the core network device may determine the first indication information according to the context of the terminal device and send it to the first network device. For example, for a terminal device in an idle state, during the RRC connection establishment process, the core network device may carry the first indication information in the initial context setup request message sent to the first network device, so that the first The network device obtains the first indication information.
  • the terminal device may send the first indication information to the first network device, and accordingly, the first network device may receive the first indication information from the terminal device.
  • the terminal device may carry the first indication information in the RRC setup request (RRC setup request) message sent to the first network device; or, for the inactive state
  • the terminal device may carry the first indication information in the RRC resume request (RRC resume request) message sent to the first network device, so that the first network device can obtain the first indication information. That is, the terminal device actively triggers the first network device to configure the second instruction information for the terminal device by sending the first instruction information to the first network device.
  • the first indication information may be stored in the context of the terminal device.
  • the first indication information is stored in the inactive state access layer context (UE INACTIVE AS context) of the terminal device.
  • the first indication information is stored in the access layer context (UE AS context) of the terminal device.
  • the first network device may receive the first indication information from a second network device (for example, a last serving (last serving) network device).
  • a second network device for example, a last serving (last serving) network device.
  • the recently served network device may carry the context of the terminal device in the retrieve UE context response message sent to the first network device.
  • the context of the terminal device includes the first indication information, so that the first network device obtains the first indication information.
  • the first network device In response to the first indication information, the first network device sends second indication information to the terminal device.
  • the terminal device receives the second indication information from the first network device.
  • the first network device can determine the second indication information in the following ways:
  • the first indication information indicates that the second indication information is configured for the terminal device
  • the terminal device attempts to access (the terminal device sends an RRC establishment request message or an RRC recovery request message to the first network device, etc.) ) Is a CAG cell
  • the second indication information indicates that the terminal device only accesses the system through the CAG cell.
  • the first network device may also determine the second indication information in combination with the allowed CAG list, that is, when the first indication information indicates that the terminal device configures the second indication information, if the cell that the terminal device tries to access is a CAG cell And the identity of the CAG cell belongs to the allowed CAG list, the second indication information indicates that the terminal device only accesses the system through the CAG cell. The reason is that in the previous implementation manner, it is not checked whether the CAG cell identity belongs to the allowed CAG list. If the CAG cell identity does not belong to the allowed CAG list, it may cause the terminal equipment to be accessed by the core when accessing the CAG cell. If the network device refuses, it will trigger the terminal device to access again.
  • the first indication information indicates that the second indication information is configured for the terminal device
  • the terminal device attempts to access the terminal device sends an RRC establishment request message or an RRC recovery request message to the first network device) Etc.
  • the second indication information indicates that the terminal device only accesses the system through the PLMN cell.
  • the first network device may also determine the second indication information according to the measurement report from the terminal device, or the measurement report and the allowed CAG list. Instructions.
  • the measurement report includes at least the identifier of the serving cell, and the identifier of the neighboring cell and the measurement result.
  • the serving cell refers to the cell where the terminal device resides.
  • the measurement report may also include the measurement result of the serving cell.
  • the identifier (the identifier of the serving cell or the identifier of the neighbor cell) includes a physical cell identifier (physical cell identifier, PCI) or a global cell identifier (cell global identifier, CGI).
  • the measurement result (measurement result of the serving cell or measurement result of the neighbor cell) includes a cell measurement result and/or a beam measurement result.
  • the serving cell is a PLMN cell
  • neighboring cells include at least one CAG cell. If the communication quality of the at least one CAG cell is good, and the identity of the at least one CAG cell belongs to the allowed CAG list, Then the second indication information indicates that the terminal device only accesses the system through the CAG cell.
  • the first network device determines that the serving cell is a PLMN cell according to the identifier of the serving cell; determines that the neighbor cell includes at least one CAG cell according to the identifier of the neighbor cell; according to the measurement result of the at least one CAG cell higher than the first threshold, and at least one CAG cell
  • the identifier belongs to the allowed CAG list, and it is determined that the second indication information indicates that the terminal device only accesses the system through the CAG cell.
  • the serving cell is a CAG cell
  • the neighboring cells only include PLMN cells. If the communication quality of the PLMN cell is good and the communication quality of the CAG cell is poor, the second indication information indicates that the terminal device only Access the system through the PLMN cell.
  • the first network device determines that the serving cell is a CAG cell according to the identity of the serving cell; determines that the neighboring cell only includes PLMN cells according to the identity of the neighboring cell; the first network device determines that the measurement result of the PLMN cell is higher than the second threshold according to the measurement result of the serving cell The result is lower than the third threshold, and it is determined that the second indication information indicates that the terminal device only accesses the system through the PLMN cell.
  • the first network device may carry the second indication in the RRC setup (RRC setup) message sent to the terminal device information.
  • RRC setup the RRC setup
  • the first network device may carry the second indication information in an RRC reconfiguration (RRC reconfiguration) message sent to the terminal device.
  • the first network device may send a message to the terminal device.
  • the RRC resume (RRC resume) message carries the second indication information.
  • the first network device may carry the second indication information in the RRC setup (RRC setup) message sent to the terminal device.
  • the first network device may release the second indication information in the RRC sent to the terminal device.
  • the (RRC release) message carries the second indication information.
  • the terminal device accesses the system through the CAG cell or accesses the system through the PLMN cell.
  • the terminal device accesses the system through the CAG cell. If the second indication information indicates that the terminal device only accesses the system through the PLMN cell, the terminal device accesses the system through the PLMN cell.
  • the first network device receives the first instruction information, where the first instruction information is used to indicate whether to configure the second instruction information for the terminal device, and the second instruction information instructs the terminal device to only pass CAG cell access to the system, or access to the system only through the PLMN cell.
  • the first network device sends the second indication information to the terminal device, so that the terminal device can access the system through the CAG cell or through the PLMN cell in response to the second indication information.
  • the first network device restricts the access of the terminal device that supports both CAG access and PLMN access, thereby controlling the terminal device to access the CAG cell or access the PLMN cell.
  • the method for sending the above indication information will be described below in conjunction with specific messages between the terminal device, the first network device, the second network device, and the core network device.
  • the terminal device when the terminal device is in the idle state, the RRC establishment process is triggered due to data transmission.
  • the terminal device may send first indication information to the first network device to actively send the first network device to the first network device. Request second instruction information.
  • an embodiment of the present application provides a method for sending indication information, and the method for sending indication information includes S301-S305:
  • the terminal device sends an RRC setup request (RRC setup request) message to the first network device.
  • RRC setup request RRC setup request
  • the first network device receives the RRC establishment request message from the terminal device, and the RRC establishment request message includes the first indication information.
  • the terminal device is in an RRC idle state and a connection management (connection management, CM) idle state.
  • This step corresponds to the description of the first network device receiving the first indication information from the terminal device in step S201.
  • the first network device sends an RRC setup (RRC setup) message to the terminal device.
  • RRC setup RRC setup
  • the terminal device receives the RRC setup message from the first network device, and the RRC setup message includes the second indication information.
  • the terminal device is in the RRC connection state and the connection management (connection management, CM) idle state.
  • step S202 corresponds to step S202.
  • step S202 For how to determine the second indication information, see step S202.
  • the terminal device sends an RRC setup complete (RRC setup complete) message to the first network device.
  • RRC setup complete RRC setup complete
  • the first network device receives an RRC establishment complete message from the terminal device, and the RRC establishment complete message includes the first non-access stratum (NAS) message of the terminal device.
  • NAS non-access stratum
  • the terminal device is in the RRC connected state and the CM connected state.
  • the terminal device accesses the system through the CAG cell or accesses the system through the PLMN cell.
  • the first network device sends the NAS message to a core network device (for example, an AMF device).
  • a core network device for example, an AMF device.
  • the RRC establishment process is triggered due to data transmission.
  • the first network device may obtain the first indication information from the core network device (for example, an AMF device), and actively send the second indication information to the terminal device.
  • the core network device for example, an AMF device
  • an embodiment of the present application provides a method for sending indication information, and the method for sending indication information includes S401-S411:
  • the terminal device sends an RRC setup request (RRC setup request) message to the first network device.
  • RRC setup request RRC setup request
  • the terminal device is in the RRC idle state and the CM idle state.
  • the first network device sends an RRC setup (RRC setup) message to the terminal device.
  • RRC setup RRC setup
  • the terminal device receives the RRC setup message from the first network device.
  • the terminal device is in the RRC connection state and the connection management (connection management, CM) idle state.
  • the terminal device sends an RRC setup complete (RRC setup complete) message to the first network device.
  • RRC setup complete RRC setup complete
  • the first network device receives the RRC establishment complete message from the terminal device, and the RRC establishment complete message includes the first NAS message of the terminal device.
  • the terminal device is in the RRC connected state and the CM connected state.
  • the first network device sends the NAS message to the core network device.
  • the core network device exchanges additional NAS messages with the terminal device through the first network device.
  • the core network device sends a downlink NAS transport (downlink NAS transport) message to the first network device.
  • the first network device sends a downlink information transfer (DL information transfer) message to the terminal device.
  • the terminal device sends an uplink information transfer (UL information transfer) message to the first network device.
  • the first network device sends an uplink NAS transport (uplink NAS transport) message to the core network device.
  • the core network device determines the first indication information according to the context of the terminal device.
  • the core network device sends an initial context setup request (initial context setup request) message to the first network device.
  • the first network device receives an initial context establishment request message from the core network device, and the initial context establishment request message includes the first indication information.
  • This step corresponds to the description of the first network device receiving the first indication information from the core network device in step S201.
  • the first network device activates the access stratum (access stratum, AS) security of the terminal device.
  • AS access stratum
  • the first network device sends a security mode command (security mode command) message to the terminal device, and the terminal device sends a security mode complete (security mode complete) message to the first network device.
  • security mode command security mode command
  • security mode complete security mode complete
  • S409 The first network device sends an RRC reconfiguration (reconfiguration) message to the terminal device.
  • the terminal device receives the RRC reconfiguration message from the first network device, and the RRC reconfiguration message includes the second indication information.
  • the RRC reconfiguration message is used to perform the reconfiguration process.
  • step S202 corresponds to step S202.
  • step S202 For how to determine the second indication information, see step S202.
  • the terminal device accesses the system through the CAG cell or accesses the system through the PLMN cell.
  • This step corresponds to S203.
  • S411 The first network device sends an initial context setup response (initial context setup response) message to the core network device.
  • the core network device receives an initial context establishment response message from the first network device, and the initial context establishment response message is used to notify the core network device that the establishment process has been completed.
  • the RRC resume (resume) process is triggered due to data transmission or RNA update.
  • a terminal device moves between different types of cells (from a CAG cell to a PLMN cell, or from a PLMN cell to a CAG cell), it can send first indication information to the first network device to actively send it to the first network device.
  • the second indication information is requested, and the first network device successfully obtains the context of the terminal device from the second network device (for example, the last serving (last serving) network device).
  • the terminal device if the terminal device is within the CAG cell, if the CAG ID of the cell belongs to the allowed CAG list of the terminal device, the terminal device cannot obtain the PLMN service through the cell, unless the terminal device is based on Positioning technology, proximity indication (proximity indication) or other technology detects that it has left the coverage of the CAG cell.
  • Positioning technology proximity indication (proximity indication) or other technology detects that it has left the coverage of the CAG cell.
  • an embodiment of the present application provides a method for sending indication information, and the method for sending indication information includes S501-S510:
  • the terminal device sends an RRC resume request (RRC resume request) message to the first network device.
  • RRC resume request RRC resume request
  • the first network device receives the RRC recovery request message from the terminal device, and the RRC recovery request message includes the first indication information.
  • the terminal device is in the RRC inactive state and the CM connected state.
  • This step corresponds to the description of the first network device receiving the first indication information from the terminal device in step S201.
  • the first network device sends a UE context request (retrieve UE context request) message to the second network device.
  • the second network device receives the UE context acquisition request message from the first network device, and the UE context acquisition request message is used to request the second network device for the context of the terminal device.
  • the second network device sends a UE context response (retrieve UE context response) message to the first network device.
  • the first network device receives the UE context acquisition response message from the second network device.
  • the first network device sends an RRC resume (RRC resume) message to the terminal device.
  • RRC resume RRC resume
  • the terminal device receives the RRC recovery message from the first network device, and the RRC recovery message includes the second indication information.
  • the terminal device is in the RRC connected state and the CM connected state.
  • step S202 corresponds to step S202.
  • step S202 For how to determine the second indication information, see step S202.
  • the terminal device accesses the system through the CAG cell or accesses the system through the PLMN cell.
  • the terminal device sends an RRC resume complete (RRC resume complete) message to the first network device.
  • the first network device receives the RRC recovery complete message from the terminal device.
  • the first network device and the terminal device complete the restoration of the RRC connection.
  • the first network device sends an Xn-U address indication (Xn-U address indication) message to the second network device.
  • the second network device receives an Xn-U address indication message from the first network device, where the Xn-U address indication message is used to indicate the forwarding address.
  • the second network device sends a path switch request (path switch request) message to the core network device.
  • the core network device receives a path switching request message from the second network device, and the path switching request message is used to request path switching.
  • the core network device sends a path switch response (path switch response) message to the first network device.
  • the first network device receives the path switching response message from the core network device.
  • the first network device sends a UE context release (UE context release) message to the second network device.
  • UE context release UE context release
  • the second network device receives a UE context release message from the first network device, and the UE context release message is used to trigger the second network device to release the context of the terminal device.
  • the RRC resume (resume) process is triggered due to data transmission or RNA update.
  • the first network device may obtain the first indication information from the second network device (for example, the nearest-served network device), and actively send the second indication information to the terminal device.
  • an embodiment of the present application provides a method for sending indication information, and the method for sending indication information includes S601-S610:
  • the terminal device sends an RRC resume request (RRC resume request) message to the first network device.
  • RRC resume request RRC resume request
  • the first network device receives the RRC recovery request message from the terminal device.
  • the terminal device is in the RRC inactive state and the CM connected state.
  • the first network device sends a UE context request (retrieve UE context request) message to the second network device.
  • the second network device receives the UE context acquisition request message from the first network device, and the UE context acquisition request message is used to request the second network device for the context of the terminal device.
  • the second network device sends a UE context acquisition response message to the first network device.
  • the first network device receives a UE context response (retrieve UE context response) message from the second network device, where the UE context response message includes the context of the terminal device, and the context of the terminal device includes the first indication information.
  • UE context response refer UE context response
  • This step corresponds to the description of the first network device receiving the first indication information from the second network device in step S201.
  • Steps S604-S610 are the same as steps S504-S510, and will not be repeated here.
  • the RRC resume (resume) process is triggered due to data transmission or RNA update.
  • a terminal device moves between different types of cells (from a CAG cell to a PLMN cell, or from a PLMN cell to a CAG cell), it can send first indication information to the first network device to actively send the first network device to the first network device.
  • the second indication information is requested, but the first network device fails to obtain the context of the terminal device from the second network device.
  • an embodiment of the present application provides a method for sending indication information, and the method for sending indication information includes S701-S706:
  • Steps S701-S702 are the same as steps S501-S502, and will not be repeated here.
  • the second network device fails to obtain or verify the context of the terminal device, and sends a UE context failure (retrieve UE context failure) message to the first network device.
  • the first network device receives the UE context acquisition failure message from the second network device.
  • the first network device sends an RRC setup (RRC Setup) message to the terminal device.
  • RRC setup RRC Setup
  • the terminal device receives the RRC setup message from the first network device, and the RRC setup message includes the second indication information.
  • step S202 corresponds to step S202.
  • step S202 For how to determine the second indication information, see step S202.
  • the terminal device accesses the system through the CAG cell or accesses the system through the PLMN cell.
  • the RRC setup message is used to instruct the terminal device to perform fallback to establish a new RRC connection, and the terminal device performs the behavior when it is in the idle state. For example, the terminal device may respond to the second indication information through the CAG cell when it establishes an RRC connection next time. Access the system or access the system through the PLMN cell. See step S203 for details.
  • the terminal device when the terminal device is in the connected state, the terminal device sends a measurement report to the first network device, and the first network device is based on the measurement report from the terminal device, or the measurement report and the terminal device
  • the allowed CAG list determines the second indication information and sends it to the terminal device.
  • an embodiment of the present application provides a method for sending indication information, and the method for sending indication information includes S801-S806:
  • the terminal device measures the serving cell and neighboring cells to obtain a measurement report, and sends the measurement report to the first network device.
  • step S201 For the content of the measurement report, see the relevant description of step S201, which will not be repeated here.
  • the first network device determines the second indication information according to the measurement report from the terminal device, or the measurement report and the allowed CAG list.
  • This step may refer to the related description in step S201 for the first network device to determine the second indication information according to the measurement report from the terminal device, or the measurement report and the allowed CAG list, which will not be repeated here.
  • the first network device sends an RRC release (RRC release) message to the terminal device.
  • RRC release RRC release
  • the terminal device receives an RRC release message from the first network device, and the RRC release message includes the second indication information.
  • S804 The terminal device enters an idle state.
  • the communication method provided by the embodiment of the present invention is described above, and the first network device, terminal device, and core network device provided by the embodiment of the present invention will be described below.
  • an embodiment of the present application provides a first network device, and the first network device 90 includes:
  • the transceiver module 901 is configured to receive first indication information, where the first indication information is used to instruct the terminal equipment to configure the second indication information, and the second indication information is used to instruct the terminal equipment to access the system only through the CAG cell of the closed access group Or only access the system through the public land mobile network PLMN cell.
  • the transceiver module 901 is further configured to send second instruction information to the terminal device in response to the first instruction information.
  • the transceiver module 901 is specifically configured to: receive the first indication information from the terminal device.
  • the transceiver module 901 is specifically configured to: receive the first indication information from the second network device.
  • the transceiver module 901 is specifically configured to: receive the first indication information from the core network device.
  • the first network device further includes a processing module 902, configured to determine the second indication information according to the measurement report from the terminal device, or the measurement report and the allowed CAG list, where the measurement report includes at least the service The identity of the cell, and the identity and measurement result of the neighboring cell; the allowed CAG list includes the identity of the CAG cell that the terminal device is allowed to access.
  • a processing module 902 configured to determine the second indication information according to the measurement report from the terminal device, or the measurement report and the allowed CAG list, where the measurement report includes at least the service The identity of the cell, and the identity and measurement result of the neighboring cell; the allowed CAG list includes the identity of the CAG cell that the terminal device is allowed to access.
  • the processing module 902 is specifically configured to: determine that the serving cell is a PLMN cell according to the identity of the serving cell; determine that the neighbor cell includes at least one CAG cell according to the identity of the neighbor cell; and according to the measurement result of the at least one CAG cell It is higher than the first threshold, and the identity of at least one CAG cell belongs to the allowed CAG list, and it is determined that the second indication information indicates that the terminal device only accesses the system through the CAG cell.
  • the measurement report also includes the measurement result of the serving cell
  • the processing module 902 is specifically configured to: determine that the serving cell is a CAG cell according to the identity of the serving cell; determine that the neighbor cell only includes the PLMN cell according to the identity of the neighbor cell ; According to the measurement result of the PLMN cell higher than the second threshold and the measurement result of the serving cell lower than the third threshold, it is determined that the second indication information indicates that the terminal device only accesses the system through the PLMN cell.
  • the first indication information is stored in the context of the terminal device.
  • the first indication information is stored in the inactive access stratum context of the terminal device.
  • the first indication information is stored in the access layer context of the terminal device.
  • processing module 902 in the embodiment of the present invention may be implemented by a processor or a processor-related circuit component
  • transceiver module 901 may be implemented by a transceiver or a transceiver-related circuit component.
  • an embodiment of the present invention also provides a first network device.
  • the first network device 100 includes a processor 1001, a memory 1002, and a transceiver 1003.
  • the memory 1002 stores instructions or programs, and the processor 1001 Used to execute instructions or programs stored in the memory 1002.
  • the processor 1001 is used to perform the operations performed by the processing module 902 in the foregoing embodiment
  • the transceiver 1003 is used to perform the operations performed by the transceiver module 901 in the foregoing embodiment.
  • first network device 90 or the first network device 100 may correspond to the first network device in the instruction information sending method of the embodiment of the present invention, and the first network device 90 or the first network device
  • the operation and/or function of each module in 100 is to implement the corresponding process of each method in FIG. 2 to FIG. 8. For the sake of brevity, it will not be repeated here.
  • an embodiment of the present application provides a terminal device, and the terminal device 110 includes:
  • the transceiver module 1101 is configured to receive second indication information from the first network device, and the second indication information is used to instruct the terminal device to access the system only through the CAG cell or to access the system only through the PLMN cell.
  • the processing module 1102 is configured to respond to the second indication information to access the system through the CAG cell or access the system through the PLMN cell.
  • the transceiver module 1101 is further configured to send first instruction information to the first network device, where the first instruction information is used to instruct to configure the second instruction information for the terminal device.
  • the transceiver module 1101 is further configured to send a measurement report to the first network device, where the measurement report includes at least the identity of the serving cell, and the identity and measurement result of the neighboring cell, and the serving cell is a PLMN Cell, the neighbor cell includes at least one CAG cell, or the serving cell is a CAG cell, and the neighbor cell only includes a PLMN cell.
  • the measurement report also includes the measurement result of the serving cell.
  • the first indication information is stored in the context of the terminal device.
  • the first indication information is stored in the inactive access stratum context of the terminal device.
  • the first indication information is stored in the access layer context of the terminal device.
  • processing module 1102 in the embodiment of the present invention may be implemented by a processor or a processor-related circuit component
  • transceiver module 1101 may be implemented by a transceiver or a transceiver-related circuit component.
  • an embodiment of the present invention also provides a terminal device.
  • the terminal device 120 includes a processor 1201, a memory 1202, and a transceiver 1203.
  • the memory 1202 stores instructions or programs, and the processor 1201 is used to execute the memory. Instructions or programs stored in 1202.
  • the processor 1201 is configured to execute the operations performed by the processing module 1102 in the foregoing embodiment
  • the transceiver 1203 is configured to execute the operations performed by the transceiver module 1101 in the foregoing embodiment.
  • terminal device 110 or the terminal device 120 may correspond to the terminal device in the instruction information sending method of the embodiment of the present invention, and the operation and/or operation of each module in the terminal device 110 or the terminal device 120
  • the functions are to implement the corresponding processes of the methods in FIGS. 2 to 8 respectively, and for the sake of brevity, details are not repeated here.
  • an embodiment of the present application provides a core network device, and the core network device 130 includes:
  • the processing module 1301 is used to determine the first indication information, where the first indication information is used to instruct the communication device to configure the second indication information, and the second indication information is used to instruct the communication device to access the system only through the CAG cell of the closed access group Or only access the system through the public land mobile network PLMN cell;
  • the transceiver module 1302 is configured to send first indication information to the first network device.
  • processing module 1301 in the embodiment of the present invention may be implemented by a processor or a processor-related circuit component
  • transceiver module 1302 may be implemented by a network interface or a network interface-related circuit component.
  • an embodiment of the present invention also provides a core network device.
  • the core network device 140 includes a processor 1401, a memory 1402, and a network interface 1403.
  • the memory 1402 stores instructions or programs, and the processor 1401 is configured to The instructions or programs stored in the memory 1402 are executed.
  • the processor 1401 is used to perform the operations performed by the processing module 1301 in the foregoing embodiment
  • the network interface 1403 is used to perform the operations performed by the transceiver module 1302 in the foregoing embodiment.
  • the core network device 130 or the core network device 140 may correspond to the core network device in the instruction information sending method of the embodiment of the present invention, and each module in the core network device 130 or the core network device 140
  • the operations and/or functions of are used to implement the corresponding processes of the methods in FIGS. 2 to 8 respectively, and for the sake of brevity, they will not be repeated here.
  • the embodiment of the present application also provides a computer-readable storage medium, and the computer-readable storage medium stores a computer program.
  • the computer program When the computer program is run by a processor, it can realize that the instruction information sending method provided by the above method embodiment is connected with the first network. Equipment-related processes.
  • the embodiments of the present application also provide a computer-readable storage medium, and the computer-readable storage medium stores a computer program.
  • the computer program When the computer program is run by a processor, it can realize that the instruction information sending method provided by the above method embodiment is related to the terminal device. Process.
  • the embodiment of the present application also provides a computer-readable storage medium, and the computer-readable storage medium stores a computer program.
  • the computer program When the computer program is run by a processor, it can realize that the instruction information sending method provided by the above method embodiment is related to the core network device. Related processes.
  • the embodiment of the present application also provides a communication device, and the communication device may be a first network device or a circuit.
  • the communication device may be used to perform the actions performed by the first network device in the foregoing method embodiments.
  • the communication device 150 includes one or more radio frequency units, such as a remote radio unit (RRU) 1501 and one or more baseband units (BBU) (also called digital units). ,Digital unit,DU)1502.
  • the RRU 1501 may be called a transceiver module, which corresponds to the transceiver module 901 in FIG. 9.
  • the transceiver module may also be called a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 1503 ⁇ RF unit 1504.
  • the RRU 1501 part is mainly used for sending and receiving of radio frequency signals and conversion of radio frequency signals and baseband signals, for example, for sending instruction information to terminal equipment.
  • the BBU 1502 part is mainly used to perform baseband processing, control the base station, and so on.
  • the RRU 1501 and the BBU 1502 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 1502 is the control center of the base station, and may also be called a processing module, which may correspond to the processing module 902 in FIG. 9, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading.
  • the BBU 1502 may be used to control the base station to execute the operation procedure of the first network device in the foregoing method embodiment.
  • the BBU 1502 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network (such as an LTE network) of a single access standard, or can support different access standards. Wireless access network (such as LTE network, 5G network or other network).
  • the BBU 1502 further includes a memory 1505 and a processor 1506, and the processor 1506 is connected to the memory 1505.
  • the memory 1505 is used to store computer programs and data.
  • the processor 1506 is configured to execute a computer program stored in the memory 1505, for example, to control the base station to execute the operation procedure of the first network device in the foregoing method embodiment.
  • the memory 1505 and the processor 1506 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.
  • the embodiment of the present application also provides a communication device, and the communication device may be a terminal device or a circuit.
  • the communication device can be used to perform the actions performed by the terminal device in the foregoing method embodiments.
  • the communication device 160 includes a processor 1601, a memory 1602, a radio frequency circuit 1603, an antenna 1604, and an input/output device 1605.
  • the processor 1601 is connected to the memory 1602.
  • the memory 1602 is mainly used to store computer programs and data.
  • the processor 1601 is mainly used to execute computer programs stored in the memory 1602, such as processing communication protocols and communication data, and controlling terminal devices.
  • the radio frequency circuit 1603 is mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals.
  • the antenna 1604 is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves.
  • the input and output device 1605 includes, for example, a touch screen, a display screen, a keyboard, etc., and is mainly used to receive data input by a user and output data to the user. It should be noted that some types of terminal devices may not have input and output devices.
  • the processor 1601 When data needs to be sent, the processor 1601 performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit 1603.
  • the radio frequency circuit 1603 performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna 1604.
  • the radio frequency circuit 1603 receives the radio frequency signal through the antenna 1604, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1601.
  • the processor 1601 converts the baseband signal into data and performs Data is processed.
  • the memory 1602 may also be referred to as a storage medium or a storage device or the like.
  • the memory 1602 may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.
  • the radio frequency circuit 1603 may correspond to the transceiver module 1101 in FIG. 11, and is used to perform the sending and receiving operations on the terminal device side in the foregoing method embodiment.
  • the processor 1601 may correspond to the processing module 1102 in FIG. Perform other operations on the terminal device in the foregoing method embodiment except for the receiving and sending operations.
  • the embodiment of the present application also provides a communication device, and the communication device may be a core network device or a circuit.
  • the communication device may be used to perform the actions performed by the core network device in the foregoing method embodiments.
  • the communication device 170 includes: at least one processor 1701, at least one memory 1702, at least one communication interface 1703. Among them, at least one processor 1701, at least one memory 1702, at least one communication interface 1703 may be connected through a bus.
  • the memory 1702 is used to store computer program codes.
  • the processor 1701 is configured to execute a computer program stored in the memory 1702 to execute the functions of the core network device in the foregoing method embodiments.
  • the communication interface 1703 is used to communicate with other communication devices such as the first network device.
  • the communication interface 1703 can communicate in a wired or wireless communication manner.
  • the communication interface 1703 may correspond to the transceiver module 1302 in FIG. 13 and is used to perform the sending operation of the core network device in the foregoing method embodiment.
  • the processor 1701 may correspond to the processing module 1301 in FIG. 13 and is used to perform the foregoing method. In the embodiment, other operations on the core network device except for the receiving and sending operations.
  • the processor mentioned in the embodiment of this application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (digital signal processors, DSP), and application specific integrated circuits (application specific integrated circuits). circuit, ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic RAM
  • DRAM dynamic random access memory
  • synchronous dynamic random access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory serial DRAM, SLDRAM
  • direct rambus RAM direct rambus RAM, DR RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
  • the memory storage module
  • the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection between devices or units through some interfaces, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • a software program it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or includes one or more data storage devices such as servers, data centers, etc. that can be integrated with the medium.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

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Abstract

本申请公开了一种指示信息发送方法、网络设备、通信装置和核心网设备，涉及通信领域，用于对同时支持CAG接入和PLMN接入的终端设备，控制该终端设备接入CAG小区或接入PLMN小区。一种第一网络设备，包括：收发模块，用于接收第一指示信息，其中，第一指示信息用于指示为通信装置配置第二指示信息，第二指示信息用于指示通信装置仅通过封闭接入组CAG小区接入系统或者仅通过公共陆地移动网络PLMN小区接入系统；收发模块，还用于响应于第一指示信息，向通信装置发送第二指示信息。

Description

指示信息发送方法、网络设备、通信装置和核心网设备 技术领域
本申请涉及通信领域，尤其涉及一种指示信息发送方法、网络设备、通信装置和核心网设备。
背景技术
根据企业与运营商的签约信息，运营商可以仅在某些特定的范围内(比如工厂园区的覆盖范围内)为企业提供非公共网络(non-public network，NPN)服务。可以通过切片的形式划分出封闭接入组(closed access group，CAG)小区和公共陆地移动网络(public land mobile network，PLMN)小区，其中，CAG小区供属于该NPN的终端设备(NPN-UE)接入系统，PLMN小区供不属于该NPN的终端设备(non-NPN-UE)接入系统。
对于同时支持通过CAG小区接入系统或者通过PLMN小区接入系统的终端设备来说，如果能够被CAG小区和PLMN小区同时覆盖，则终端设备的接入将不受限制，例如，终端设备既可以通过CAG小区接入系统也可以通过PLMN小区接入系统，这会影响NPN服务的安全性。
发明内容
本申请实施例提供一种指示信息发送方法、网络设备、通信装置和核心网设备，用于对同时支持CAG接入和PLMN接入的终端设备，控制该终端设备接入CAG小区或接入PLMN小区。
为达到上述目的，本申请的实施例采用如下技术方案：
第一方面，提供了一种指示信息发送方法，包括：第一网络设备接收第一指示信息，其中，第一指示信息用于指示为终端设备配置第二指示信息，第二指示信息用于指示终端设备仅通过封闭接入组CAG小区接入系统或者仅通过公共陆地移动网络PLMN小区接入系统。响应于第一指示信息，第一网络设备向终端设备发送第二指示信息。
本申请实施例提供的指示信息发送方法，第一网络设备接收第一指示信息，其中，第一指示信息用于指示是否为该终端设备配置第二指示信息，第二指示信息指示终端设备仅通过CAG小区接入系统，或者，仅通过PLMN小区接入系统。响应于第一指示信息，第一网络设备向终端设备发送第二指示信息，使得终端设备可以响应于第二指示信息，通过CAG小区或者通过PLMN小区接入系统。由第一网络设备对同时支持CAG接入和PLMN接入的终端设备的接入进行限制，从而控制该终端设备接入CAG小区或接入PLMN小区。
在一种可能的实施方式中，第一网络设备接收第一指示信息，包括：第一网络设备从终端设备接收第一指示信息。即终端设备主动请求配置第二指示信息。
在一种可能的实施方式中，第一网络设备接收第一指示信息，包括：第一网络设 备从第二网络设备接收第一指示信息。第二网络设备可以为最近服务(last serving)网络设备。
在一种可能的实施方式中，第一网络设备接收第一指示信息，包括：第一网络设备从核心网设备接收第一指示信息。即由核心网设备主动指示网络设备为终端设备配置第二指示信息。
在一种可能的实施方式中，该方法还包括：第一网络设备根据来自终端设备的测量报告，或者，测量报告和允许CAG列表确定第二指示信息，其中，测量报告至少包括服务小区的标识，以及，邻居小区的标识和测量结果；允许CAG列表包括终端设备允许接入的CAG小区的标识。即网络设备可以根据终端设备的测量报告来确定第二指示信息。
在一种可能的实施方式中，第一网络设备根据来自终端设备的测量报告，或者，测量报告和允许CAG列表确定第二指示信息，包括：第一网络设备根据服务小区的标识确定服务小区为PLMN小区；第一网络设备根据邻居小区的标识确定邻居小区包括至少一个CAG小区；第一网络设备根据至少一个CAG小区的测量结果高于第一门限，并且至少一个CAG小区的标识属于允许CAG列表，确定第二指示信息指示终端设备仅通过CAG小区接入系统。终端设备在从PLMN小区切入CAG小区时，要求CAG小区的通信质量满足通信需求，并且CAG小区的标识要属于允许CAG列表。
在一种可能的实施方式中，测量报告还包括服务小区的测量结果，第一网络设备根据来自终端设备的测量报告，或者，测量报告和允许CAG列表确定第二指示信息，包括：第一网络设备根据服务小区的标识确定服务小区为CAG小区；第一网络设备根据邻居小区的标识确定邻居小区仅包括PLMN小区；第一网络设备根据PLMN小区的测量结果高于第二门限，服务小区的测量结果低于第三门限，确定第二指示信息指示终端设备仅通过PLMN小区接入系统。终端设备在从CAG小区切入PLMN小区时，条件相对苛刻，不仅要求CAG小区通信质量较差，而且要求PLMN小区通信质量较好。
在一种可能的实施方式中，在第一网络设备中，第一指示信息存储在终端设备的上下文中。
在一种可能的实施方式中，终端设备处于非激活态时，第一指示信息存储在终端设备的非激活接入层上下文中。终端设备处于不同状态时，第一指示信息的存储位置是不同的。
在一种可能的实施方式中，终端设备处于连接态时，第一指示信息存储在终端设备的接入层上下文中。终端设备处于不同状态时，第一指示信息的存储位置是不同的。
第二方面，提供了一种指示信息发送方法，包括：从第一网络设备接收第二指示信息，第二指示信息用于指示终端设备仅通过CAG小区接入系统或者仅通过PLMN小区接入系统；响应于第二指示信息，通过CAG小区接入系统或者通过PLMN小区接入系统。
本申请实施例提供的指示信息发送方法，第一网络设备接收第一指示信息，其中，第一指示信息用于指示是否为该终端设备配置第二指示信息，第二指示信息指示终端设备仅通过CAG小区接入系统，或者，仅通过PLMN小区接入系统。响应于第一指 示信息，第一网络设备向终端设备发送第二指示信息，使得终端设备可以响应于第二指示信息，通过CAG小区或者通过PLMN小区接入系统。由第一网络设备对同时支持CAG接入和PLMN接入的终端设备的接入进行限制，从而控制该终端设备接入CAG小区或接入PLMN小区。
在一种可能的实施方式中，该方法还包括：向第一网络设备发送第一指示信息，其中，第一指示信息用于指示为终端设备配置第二指示信息。即终端设备主动请求配置第二指示信息。
在一种可能的实施方式中，该方法还包括：向第一网络设备发送测量报告，其中，测量报告至少包括服务小区的标识，以及，邻居小区的标识和测量结果，服务小区为PLMN小区，邻居小区包括至少一个CAG小区，或者，服务小区为CAG小区，邻居小区仅包括PLMN小区。测量报告可用于网络设备确定第二指示信息。
在一种可能的实施方式中，测量报告还包括服务小区的测量结果。
在一种可能的实施方式中，第一指示信息存储在终端设备的上下文中。
在一种可能的实施方式中，终端设备处于非激活态时，第一指示信息存储在终端设备的非激活接入层上下文中。终端设备处于不同状态时，第一指示信息的存储位置是不同的。
在一种可能的实施方式中，终端设备处于连接态时，第一指示信息存储在终端设备的接入层上下文中。终端设备处于不同状态时，第一指示信息的存储位置是不同的。
第三方面，提供了一种指示信息发送方法，包括：核心网设备确定第一指示信息，其中，第一指示信息用于指示为终端设备配置第二指示信息，第二指示信息用于指示终端设备仅通过封闭接入组CAG小区接入系统或者仅通过公共陆地移动网络PLMN小区接入系统；核心网设备向第一网络设备发送第一指示信息。
本申请实施例提供的指示信息发送方法，由核心网设备主动指示网络设备为终端设备配置第二指示信息。使得终端设备可以响应于第二指示信息，通过CAG小区或者通过PLMN小区接入系统。由第一网络设备对同时支持CAG接入和PLMN接入的终端设备的接入进行限制，从而控制该终端设备接入CAG小区或接入PLMN小区。
第四方面，提供了一种第一网络设备，包括：收发模块，用于接收第一指示信息，其中，第一指示信息用于指示为终端设备配置第二指示信息，第二指示信息用于指示终端设备仅通过封闭接入组CAG小区接入系统或者仅通过公共陆地移动网络PLMN小区接入系统；收发模块，还用于响应于第一指示信息，向终端设备发送第二指示信息。
在一种可能的实施方式中，收发模块具体用于：从终端设备接收第一指示信息。
在一种可能的实施方式中，收发模块具体用于：从第二网络设备接收第一指示信息。
在一种可能的实施方式中，收发模块具体用于：从核心网设备接收第一指示信息。
在一种可能的实施方式中，第一网络设备还包括处理模块，用于根据来自终端设备的测量报告，或者，测量报告和允许CAG列表确定第二指示信息，其中，测量报告至少包括服务小区的标识，以及，邻居小区的标识和测量结果；允许CAG列表包括终端设备允许接入的CAG小区的标识。
在一种可能的实施方式中，处理模块具体用于：根据服务小区的标识确定服务小区为PLMN小区；根据邻居小区的标识确定邻居小区包括至少一个CAG小区；根据至少一个CAG小区的测量结果高于第一门限，并且至少一个CAG小区的标识属于允许CAG列表，确定第二指示信息指示终端设备仅通过CAG小区接入系统。
在一种可能的实施方式中，测量报告还包括服务小区的测量结果，处理模块具体用于：根据服务小区的标识确定服务小区为CAG小区；根据邻居小区的标识确定邻居小区仅包括PLMN小区；根据PLMN小区的测量结果高于第二门限，服务小区的测量结果低于第三门限，确定第二指示信息指示终端设备仅通过PLMN小区接入系统。
在一种可能的实施方式中，在第一网络设备中，第一指示信息存储在终端设备的上下文中。
在一种可能的实施方式中，终端设备处于非激活态时，第一指示信息存储在终端设备的非激活接入层上下文中。
在一种可能的实施方式中，终端设备处于连接态时，第一指示信息存储在终端设备的接入层上下文中。
第五方面，提供了一种终端设备，包括：收发模块，用于从第一网络设备接收第二指示信息，第二指示信息用于指示终端设备仅通过CAG小区接入系统或者仅通过PLMN小区接入系统；处理模块，用于响应于第二指示信息，通过CAG小区接入系统或者通过PLMN小区接入系统。
在一种可能的实施方式中，收发模块还用于：向第一网络设备发送第一指示信息，其中，第一指示信息用于指示为终端设备配置第二指示信息。
在一种可能的实施方式中，收发模块还用于：向第一网络设备发送测量报告，其中，测量报告至少包括服务小区的标识，以及，邻居小区的标识和测量结果，服务小区为PLMN小区，邻居小区包括至少一个CAG小区，或者，服务小区为CAG小区，邻居小区仅包括PLMN小区。
在一种可能的实施方式中，测量报告还包括服务小区的测量结果。
在一种可能的实施方式中，第一指示信息存储在终端设备的上下文中。
在一种可能的实施方式中，终端设备处于非激活态时，第一指示信息存储在终端设备的非激活接入层上下文中。
在一种可能的实施方式中，终端设备处于连接态时，第一指示信息存储在终端设备的接入层上下文中。
第六方面，提供了一种核心网设备，包括：处理模块，用于确定第一指示信息，其中，第一指示信息用于指示为终端设备配置第二指示信息，第二指示信息用于指示终端设备仅通过封闭接入组CAG小区接入系统或者仅通过公共陆地移动网络PLMN小区接入系统；收发模块，用于向第一网络设备发送第一指示信息。
第七方面，提供了一种通信装置，包括处理器，处理器与存储器相连，存储器用于存储计算机程序，处理器用于执行存储器中存储的计算机程序，以使得装置执行如第一方面及其任一项实施方式所述的方法。
第八方面，提供了一种通信装置，包括处理器，所述处理器与存储器相连，所述存储器用于存储计算机程序，所述处理器用于执行所述存储器中存储的计算机程序， 以使得所述装置执行如第二方面及其任一项实施方式所述的方法。
第九方面，提供了一种通信装置，包括处理器，所述处理器与存储器相连，所述存储器用于存储计算机程序，所述处理器用于执行所述存储器中存储的计算机程序，以使得所述装置执行如第三方面及其任一项实施方式所述的方法。
第十方面，提供了一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，当所述计算机程序被运行时，实现如第一方面及其任一项实施方式所述的方法。
第十一方面，提供了一种计算机可读存储介质，计算机可读存储介质存储有计算机程序，当所述计算机程序被运行时，实现如第二方面及其任一项实施方式所述的方法。
第十二方面，提供了一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，当所述计算机程序被运行时，实现如第三方面及其任一项实施方式所述的方法。
第十三方面，提供了一种通信系统，包括如第四方面及其任一项所述的第一网络设备，如第五方面及其任一项所述的终端设备，以及如第六方面及其任一项所述的核心网设备。
第四方面到第十三方面的技术效果参照第一方面至第三方面的内容，在此不再重复。
附图说明
图1为本申请实施例提供的一种通信系统的架构示意图；
图2为本申请实施例提供的一种指示信息发送方法的流程示意图一；
图3为本申请实施例提供的一种指示信息发送方法的流程示意图二；
图4为本申请实施例提供的一种指示信息发送方法的流程示意图三；
图5为本申请实施例提供的一种指示信息发送方法的流程示意图四；
图6为本申请实施例提供的一种指示信息发送方法的流程示意图五；
图7为本申请实施例提供的一种指示信息发送方法的流程示意图六；
图8为本申请实施例提供的一种指示信息发送方法的流程示意图七；
图9为本申请实施例提供的一种第一网络设备的结构示意图一；
图10为本申请实施例提供的一种第一网络设备的结构示意图二；
图11为本申请实施例提供的一种终端设备的结构示意图一；
图12为本申请实施例提供的一种终端设备的结构示意图二；
图13为本申请实施例提供的一种核心网设备的结构示意图一；
图14为本申请实施例提供的一种核心网设备的结构示意图二；
图15为本申请实施例提供的一种通信装置的结构示意图；
图16为本申请实施例提供的另一种通信装置的结构示意图；
图17为本申请实施例提供的又一种通信装置的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
应理解，本申请实施例的技术方案可以应用于长期演进(long term evolution，LTE) 架构，还可以应用于通用移动通信系统(universal mobile telecommunications system，UMTS)陆地无线接入网(UMTS terrestrial radio access network，UTRAN)架构，或者全球移动通信系统(global system for mobile communication，GSM)/增强型数据速率GSM演进(enhanced data rate for GSM evolution，EDGE)系统的无线接入网(GSM EDGE radio access network，GERAN)架构。在UTRAN架构或/GERAN架构中，MME的功能由服务通用分组无线业务(general packet radio service，GPRS)支持节点(serving GPRS support，SGSN)完成，SGW\PGW的功能由网关GPRS支持节点(gateway GPRS support node，GGSN)完成。本申请实施例的技术方案还可以应用于其他通信系统，例如公共陆地移动网络(public land mobile network，PLMN)系统，甚至未来的第五代(5th generation，5G)通信系统或5G之后的通信系统等，本申请实施例对此不作限定。
本申请实施例涉及终端设备。终端设备可以为包含无线收发功能、且可以与网络设备配合为用户提供通讯服务的设备。具体地，终端设备可以指用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信装置、用户代理或用户装置。例如，终端设备可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、机器人、无人机、智能驾驶车辆、家用电器、车载设备、医疗设备、智慧物流设备、可穿戴设备，未来5G网络或5G之后的网络中的终端设备等，本申请实施例对此不作限定。
本申请实施例中涉及的网络设备也可称为无线接入网(radio access network，RAN)设备。RAN设备与终端设备连接，用于接收终端设备的数据并发送给核心网设备。RAN设备在不同通信系统中对应不同的设备，例如，在2G系统中对应基站与基站控制器，在3G系统中对应基站与无线网络控制器(radio network controller，RNC)，在4G系统中对应演进型基站(evolutional node B，eNB)，在5G系统中对应5G系统，例如新无线接入系统(new radio access technology，NR)中的接入网设备(例如gNB，CU，DU)。或者，该网络设备可以为中继站、接入点、车载设备、可穿戴设备以及未来5G网络或5G之后的网络中的网络侧设备或未来演进的PLMN网络中的网络设备等。
本申请实施例还涉及核心网(core network，CN)设备。CN设备在不同的通信系统中对应不同的设备，例如，在3G系统中对应服务GPRS支持节点(serving GPRS support node，SGSN)或网关GPRS支持节点(gateway GPRS support node，GGSN)，在4G系统中对应移动管理实体(mobility management entity，MME)或服务网关(serving gateway，S-GW)，在5G系统中对应5G系统的核心网相关设备(例如NG-Core)。
为了便于理解本申请，首先在此介绍本申请的描述中涉及的概念：
连接(connected)态，终端设备与RAN设备之间建立了无线资源控制(radio resource control，RRC)连接，终端设备与核心网设备之间的连接也已建立，若有数据需要传输，可以直接通过已建立的连接完成。当终端设备处于连接态时，RAN设备保存终端设备的上下文信息，可以执行基于RAN设备控制的小区切换。
空闲(idle)态，终端设备与RAN设备之间没有RRC连接，且与核心网设备之间的连接未建立，若有数据需要传输，需要先建立与RAN设备以及核心网设备的连接。当终端设备处于空闲态时，RAN设备释放终端设备的上下文信息，终端设备可以执行基于小区的重选。
非激活(inactive)态，还可以称为轻连接(light connection)态、挂起(suspend)态、去激活态、低开销状态等。
在终端设备处于非激活态时，可以通过恢复(resume)消息恢复终端设备与RAN设备间的RRC连接，另外，还可以恢复终端设备与RAN设备间的用于传输数据的数据无线承载(data radio bearer，DRB)。该终端设备的S1接口会锚定在一个RAN设备(可以称之为锚点RAN设备)，然后可以执行小区重选移动性，在一个预定的区域(如，称之为“基于RAN的通知区”，或“无线接入网区”)内移动时不需要通知锚点RAN设备，而一旦出了基于RAN设备的通知区(RAN-based notification area，RNA)，则需要向锚点RAN设备通知其位置，这个过程称为基于RAN的通知区更新。本申请实施例中提及的“非激活态”只是用于描述这种状态，而非任何限定。
在非激活态，终端设备可以执行基于小区的重选操作，同时，终端设备的连接信息保存在锚点RAN设备，终端设备的连接信息包括终端设备的上下文信息以及核心网连接。在终端设备处于非激活态时，终端设备保存一个锚点RAN设备配置的管理区域信息，终端设备移动出该管理区域信息对应的管理区域时需要通知锚点RAN设备。
上下文信息，RAN设备与终端设备建立RRC连接之后，RAN设备保存终端设备的上下文信息，RAN设备与终端设备基于上下文信息进行通信。
具体地，上下文信息包括终端设备的标识信息、终端设备的安全上下文信息、终端设备的签约信息、终端设备的无线承载的配置信息、逻辑信道信息以及网络切片信息(network slicing info)。
终端设备的标识，表示能够唯一标识终端设备的标识，可以是由RAN设备为终端设备分配的标识，也可以为核心网设备为该终端设备分配的标识。
图1为本申请实施例的通信系统的架构示意图。包括：终端设备101、网络设备102和核心网设备103。
终端设备101与网络设备102之间通过无线连接，网络设备102与网络设备102之间通过Xn接口连接，网络设备102与核心网设备103之间通过NG接口连接。
网络设备102也可以称为下一代无线接入网(next generation radio access network，NG-RAN)，其中，NG-RAN包括gNB和下一代演进型基站(next generation evolutional node B，ng-eNB)。
ng-eNB可以与终端设备101直接通信，为终端设备101提供E-UTRA用户平面和控制平面连接。gNB可以与终端设备101间接通信(例如通过ng-eNB)，为终端设备101提供NR用户平面和控制平面连接。
核心网设备103可以称为5G核心网(5GC)，可以包括接入和移动性管理功能(access and mobility management function，AMF)设备，用于移动网络中的移动性管理，例如用户位置更新、用户注册网络、用户切换等。
终端设备101初始与网络设备102建立RRC连接后，终端设备101即进入连接态。 在连接态，网络设备102保存终端设备101的上下文信息，终端设备101基于RRC连接与网络设备102进行通信，例如通过网络设备102访问核心网设备103。
然后，终端设备101可以断开与网络设备102的RRC连接，或者，网络设备102可以断开与终端设备101的RRC连接，但网络设备102保留终端设备101的上下文信息，此时终端设备101进入非激活态。
基于上述通信系统架构，运营商可以为企业构建非公共网络(non-public network，NPN)，并提供NPN服务。顾名思义，NPN是一种区别于公共网络的为特定用户提供服务的网络，在3GPP协议TS23.501的定义中，非公共网络有以下两种类型：
1)独立组网的NPN(Standalone NPN)，该网络不依赖于PLMN网络，由SNPN运营商运营。
2)非独立组网的NPN(Public network integrated NPN)，该网络依赖于PLMN网络，由传统运营商运营。
本申请实施例中，基于上述通信系统架构所建立的NPN属于非独立组网的NPN。
如前文所述的，为了支持NPN，可以通过切片的形式划分出CAG小区，其中，CAG小区供属于该NPN的终端设备(NPN-UE)接入系统，并提供NPN服务。其余的PLMN小区供不属于该NPN的终端设备(non-NPN-UE)接入系统，并提供PLMN服务。
需要说明的是，在本申请实施例中，NPN服务也可以称为CAG服务，下面均以CAG服务来进行说明。
为了对终端设备通过CAG小区接入系统进行控制，可以对终端设备配置如下CAG信息：
1)允许CAG列表(allowed CAG list)：包括终端设备允许接入的CAG小区的标识(CAG ID)，CAG ID在PLMN ID内用于唯一标识CAG小区，每个PLMN可以有多个CAG ID，每个小区可以支持多个PLMN，所以小区广播时会广播支持的所有PLMN以及每个PLMN对应的CAG ID。
2)仅CAG指示信息(CAG-only indication)(可选的)：是否仅允许终端设备通过CAG小区接入系统。
基于上述CAG信息，CAG小区、PLMN小区终端设备的接入限制如表1所示：
表1
Figure PCTCN2020074771-appb-000001
Figure PCTCN2020074771-appb-000002
其中，仅CAG小区(CAG-only cell)也可以称为CAG小区，只能向终端设备提供CAG服务。仅PLMN小区(PLMN-only cell)也可以称为PLMN小区，只能向终端设备提供PLMN服务。CAG和PLMN小区(CAG+PLMN cell)，可以向终端设备提供CAG服务和PLMN服务。
仅CAG终端设备(CAG-only UE)，指允许CAG列表(allowed CAG list)非空，并且配置了仅CAG指示信息(CAG-only indication)的终端设备。仅PLMN终端设备(PLMN-only UE)，指允许CAG列表为空或者没有配置允许CAG列表，没有配置仅CAG指示信息的终端设备。CAG和PLMN终端设备(CAG+PLMN UE)，指允许CAG列表非空，没有配置仅CAG指示信息的终端设备。
对于CAG和PLMN终端设备来说，如果终端设备配置了仅CAG指示信息，则终端设备只能通过CAG小区接入系统，不可以通过PLMN小区接入系统。如果终端设备没有配置仅CAG指示信息，并且允许CAG列表非空，则终端设备既可以通过CAG小区接入系统，也可以通过PLMN小区接入系统。
如前文所述的，对于同时支持通过CAG小区接入系统或者通过PLMN小区接入系统的终端设备来说，如果能够被CAG小区和PLMN小区同时覆盖，则终端设备的接入将不受限制，例如，终端设备既可以通过CAG小区接入系统也可以通过PLMN小区接入系统，这会影响NPN服务的安全性。
本申请实施例提供的指示信息发送方法，第一网络设备可以从核心网设备、第二网络设备、终端设备接收第一指示信息，第一指示信息用于指示是否需要为该终端设备配置第二指示信息。第一网络设备响应于第一指示信息，向终端设备发送第二指示信息。第二指示信息指示终端设备仅通过CAG小区接入系统，或者，仅通过PLMN小区接入系统。以此解决上述问题。
图2为本申请实施例提供的一种指示信息发送方法的流程示意图。图2中描述的终端设备、网络设备(第一网络设备和第二网络设备)、核心网设备可以分别对应于图1中所示的终端设备101、网络设备102、核心网设备103。如图2所示，该指示信息发送方法包括S201-S203：
S201、第一网络设备接收第一指示信息。
其中，第一指示信息用于指示是否为该终端设备配置第二指示信息。第一指示信 息可以为终端设备的上下文(例如UE context)中新定义的一种终端设备的类型，示例性的，第一指示信息可以占1比特位，取值为1(TRUE)时表示需要为该终端设备配置第二指示信息，取值为0(FALSE)时表示不必为终端设备配置第二指示信息。或者，取值为0(FALSE)时表示需要为该终端设备配置第二指示信息，取值为1(TRUE)时表示不必为终端设备配置第二指示信息。
该终端设备支持通过CAG小区接入系统以及通过PLMN小区接入该系统，相应地，终端设备尝试接入的小区的类型可以为CAG小区或PLMN小区。示例性的，该系统可以为5G系统。
第二指示信息用于指示终端设备仅通过CAG小区接入该系统或者仅通过PLMN小区接入该系统。示例性的，第二指示信息可以定义为临时仅CAG指示(temporary CAG-only indication)，取值为TRUE时指示终端设备仅通过CAG小区接入该系统，取值为FALSE时指示终端设备仅通过PLMN小区接入该系统。需要说明的是，如果第一网络设备不向终端设备配置第二指示信息，可以等效于取值FALSE，即等效于第二指示信息指示终端设备仅通过PLMN小区接入该系统。
在第一网络设备中，第一指示信息可以存储于终端设备的上下文中。在终端设备处于非激活态时，第一指示信息存储在终端设备的非激活态接入层上下文(UE INACTIVE AS context)中。在终端设备处于连接态时，第一指示信息存储在终端设备的接入层上下文(UE AS context)中。
第一网络设备至少可以通过以下方式之一接收第一指示信息：
在一种可能的实施方式中，核心网设备(例如AMF设备)可以确定第一指示信息，并向第一网络设备发送第一指示信息。相应地，第一网络设备可以从核心网设备获取第一指示信息。第一指示信息在核心网设备中可以存储于终端设备的上下文中，核心网设备可以根据终端设备的上下文确定第一指示信息，并发送给第一网络设备。例如，对于空闲态的终端设备，在RRC连接建立流程中，核心网设备可以在向第一网络设备发送的初始上下文建立请求(initial context setup request)消息中携带第一指示信息，从而使得第一网络设备获取第一指示信息。
在另一种可能的实施方式中，终端设备可以向第一网络设备发送第一指示信息，相应地，第一网络设备可以从终端设备接收第一指示信息。例如，对于空闲态的终端设备，在RRC连接建立流程中，终端设备可以在向第一网络设备发送的RRC建立请求(RRC setup request)消息中携带第一指示信息；或者，对于非激活态的终端设备，在RRC连接恢复流程中，终端设备可以在向第一网络设备发送的RRC恢复请求(RRC resume request)消息中携带第一指示信息，从而使得第一网络设备获取第一指示信息。也就是说，由终端设备通过向第一网络设备发送第一指示信息，主动触发第一网络设备为终端设备配置第二指示信息。
在终端设备中，第一指示信息可以存储于终端设备的上下文中。在终端设备处于非激活态时，第一指示信息存储在终端设备的非激活态接入层上下文(UE INACTIVE AS context)中。在终端设备处于连接态时，第一指示信息存储在终端设备的接入层上下文(UE AS context)中。
在又一种可能的实施方式中，第一网络设备可以从第二网络设备(例如最近服务 (last serving)网络设备)接收第一指示信息。例如，对于非激活态的终端设备，在RRC连接恢复流程中，最近服务网络设备可以在向第一网络设备发送的获取UE上下文响应(retrieve UE context response)消息中携带终端设备的上下文，在该终端设备的上下文中包括第一指示信息，从而使得第一网络设备获取第一指示信息。
S202、响应于第一指示信息，第一网络设备向终端设备发送第二指示信息。
相应地，终端设备从第一网络设备接收第二指示信息。
第一网络设备可以通过以下几种方式来确定第二指示信息：
在一种可能的实施方式中，在第一指示信息指示为终端设备配置第二指示信息时，如果终端设备尝试接入(终端设备向第一网络设备发送RRC建立请求消息或RRC恢复请求消息等)的小区为CAG小区，则第二指示信息指示终端设备仅通过CAG小区接入该系统。
需要说明的是，第一网络设备还可以结合允许CAG列表来确定第二指示信息，即在第一指示信息指示为终端设备配置第二指示信息时，如果终端设备尝试接入的小区为CAG小区，并且该CAG小区的标识属于允许CAG列表，则第二指示信息指示终端设备仅通过CAG小区接入该系统。原因在于，上一种实施方式中不对CAG小区的标识是否属于允许CAG列表进行核查，如果该CAG小区的标识不属于允许CAG列表，有可能导致终端设备通过该CAG小区进行接入时，被核心网设备拒绝，将触发终端设备再次进行接入。
在另一种可能的实施方式中，在第一指示信息指示为终端设备配置第二指示信息时，如果终端设备尝试接入(终端设备向第一网络设备发送RRC建立请求消息或RRC恢复请求消息等)的小区为PLMN小区，则第二指示信息指示终端设备仅通过PLMN小区接入该系统。
需要说明的是，除了上述确定第二指示信息的方式，在终端设备处于连接态时，第一网络设备还可以根据来自终端设备的测量报告，或者，所述测量报告和允许CAG列表确定第二指示信息。
其中，该测量报告至少包括服务小区的标识，以及，邻居小区的标识和测量结果。服务小区指终端设备驻留的小区。该测量报告还可以包括服务小区的测量结果。
所述标识(服务小区的标识或者邻居小区的标识)包括物理小区标识(physical cell identifier，PCI)或全球小区标识(cell global identifier，CGI)。所述测量结果(服务小区的测量结果或者邻居小区的测量结果)包括小区测量结果和/或波束测量结果。
在一种可能的实施方式中，服务小区为PLMN小区，邻居小区包括至少一个CAG小区，如果所述至少一个CAG小区的通信质量较好，并且所述至少一个CAG小区的标识属于允许CAG列表，则第二指示信息指示终端设备仅通过CAG小区接入该系统。
即第一网络设备根据服务小区的标识确定服务小区为PLMN小区；根据邻居小区的标识确定邻居小区包括至少一个CAG小区；根据至少一个CAG小区的测量结果高于第一门限，并且至少一个CAG小区的标识属于允许CAG列表，确定第二指示信息指示终端设备仅通过CAG小区接入系统。
在另一种可能的实施方式中，服务小区为CAG小区，邻居小区仅包括PLMN小区，如果PLMN小区的通信质量较好，并且CAG小区的通信质量较差，则第二指示 信息指示终端设备仅通过PLMN小区接入该系统。
即第一网络设备根据服务小区的标识确定服务小区为CAG小区；根据邻居小区的标识确定邻居小区仅包括PLMN小区；第一网络设备根据PLMN小区的测量结果高于第二门限，服务小区的测量结果低于第三门限，确定第二指示信息指示终端设备仅通过PLMN小区接入系统。
示例性的，在前文所述的RRC连接建立流程中，对于终端设备主动触发的获取第二指示信息，第一网络设备可以在向终端设备发送的RRC建立(RRC setup)消息中携带第二指示信息。对于第一网络设备自主决策为终端设备配置第二指示信息，第一网络设备可以在向终端设备发送的RRC重配置(RRC reconfiguration)消息中携带第二指示信息。
示例性的，在前文所述的RRC连接恢复流程中，对于第一网络设备成功从第二网络设备(例如最近服务网络设备)获取终端设备的上下文，第一网络设备可以在向终端设备发送的RRC恢复(RRC resume)消息中携带第二指示信息。对于第一网络设备未成功从第二网络设备获取终端设备的上下文，第一网络设备可以在向终端设备发送的RRC建立(RRC setup)消息中携带第二指示信息。
示例性的，对于前文所述的第一网络设备根据来自终端设备的测量报告，或者，所述测量报告和允许CAG列表确定第二指示信息，第一网络设备可以在向终端设备发送的RRC释放(RRC release)消息中携带第二指示信息。
S203、响应于第二指示信息，终端设备通过CAG小区接入该系统或者通过PLMN小区接入该系统。
如果第二指示信息指示终端设备仅通过CAG小区接入系统，则终端设备通过CAG小区接入该系统。如果第二指示信息指示终端设备仅通过PLMN小区接入系统，则终端设备通过PLMN小区接入该系统。
本申请实施例提供的指示信息发送方法，第一网络设备接收第一指示信息，其中，第一指示信息用于指示是否为该终端设备配置第二指示信息，第二指示信息指示终端设备仅通过CAG小区接入系统，或者，仅通过PLMN小区接入系统。响应于第一指示信息，第一网络设备向终端设备发送第二指示信息，使得终端设备可以响应于第二指示信息，通过CAG小区或者通过PLMN小区接入系统。由第一网络设备对同时支持CAG接入和PLMN接入的终端设备的接入进行限制，从而控制该终端设备接入CAG小区或接入PLMN小区。
下面结合终端设备、第一网络设备、第二网络设备、核心网设备之间的具体消息来对上述指示信息发送方法进行说明。
在一种可能的实施方式中，在终端设备处于空闲态时，由于要进行数据传输而触发RRC建立过程，终端设备可以通过向第一网络设备发送第一指示信息，以主动向第一网络设备请求第二指示信息。
如图3所示，本申请实施例提供了一种指示信息发送方法，该指示信息发送方法包括S301-S305：
S301、终端设备向第一网络设备发送RRC建立请求(RRC setup request)消息。
相应地，第一网络设备从终端设备接收RRC建立请求消息，该RRC建立请求消 息中包括第一指示信息。
此时，该终端设备处于RRC空闲态以及连接管理(connection management，CM)空闲态。
该步骤对应步骤S201中第一网络设备从终端设备接收第一指示信息的相关描述。
S302、第一网络设备向终端设备发送RRC建立(RRC setup)消息。
相应地，终端设备从第一网络设备接收RRC建立消息，该RRC建立消息中包括第二指示信息。
此时，该终端设备处于RRC连接态以及连接管理(connection management，CM)空闲态。
该步骤对应步骤S202，关于如何确定第二指示信息见步骤S202。
S303、终端设备向第一网络设备发送RRC建立完成(RRC setup complete)消息。
相应地，第一网络设备从终端设备接收RRC建立完成消息，该RRC建立完成消息中包括终端设备的第一个非接入层(non-access stratum，NAS)消息。
此时，该终端设备处于RRC连接态以及CM连接态。
S304、响应于第二指示信息，终端设备通过CAG小区接入系统或者通过PLMN小区接入系统。
具体见步骤S203。
S305、第一网络设备向核心网设备(例如AMF设备)发送该NAS消息。
在另一种可能的实施方式中，在终端设备处于空闲态时，由于要进行数据传输而触发RRC建立过程。第一网络设备可以从核心网设备(例如AMF设备)获取第一指示信息，并主动向终端设备发送第二指示信息。
如图4所示，本申请实施例提供了一种指示信息发送方法，该指示信息发送方法包括S401-S411：
S401、终端设备向第一网络设备发送RRC建立请求(RRC setup request)消息。
此时，该终端设备处于RRC空闲态以及CM空闲态。
S402、第一网络设备向终端设备发送RRC建立(RRC setup)消息。
相应地，终端设备从第一网络设备接收RRC建立消息。
此时，该终端设备处于RRC连接态以及连接管理(connection management，CM)空闲态。
S403、终端设备向第一网络设备发送RRC建立完成(RRC setup complete)消息。
相应地，第一网络设备从终端设备接收RRC建立完成消息，该RRC建立完成消息中包括终端设备的第一个NAS消息。
此时，该终端设备处于RRC连接态以及CM连接态。
S404、第一网络设备向核心网设备发送该NAS消息。
S405、核心网设备通过第一网络设备与终端设备交互附加的NAS消息。
例如，核心网设备向第一网络设备发送下行NAS传输(downlink NAS transport)消息。第一网络设备向终端设备发送下行信息传输(DL information transfer)消息。终端设备向第一网络设备发送上行信息传输(UL information transfer)消息。第一网络设备向核心网设备发送上行NAS传输(uplink NAS transport)消息。
S406、核心网设备根据终端设备的上下文确定第一指示信息。
S407、核心网设备向第一网络设备发送初始上下文建立请求(initial context setup request)消息。
相应地，第一网络设备从核心网设备接收初始上下文建立请求消息，该初始上下文建立请求消息中包括第一指示信息。
该步骤对应步骤S201中第一网络设备从核心网设备接收第一指示信息的相关描述。
S408、第一网络设备激活终端设备的接入层(access stratum，AS)安全性。
例如，第一网络设备向终端设备发送安全模式命令(security mode command)消息，终端设备向第一网络设备发送安全模式完成(security mode complete)消息。
S409、第一网络设备向终端设备发送RRC重配(reconfiguration)消息。
相应地，终端设备从第一网络设备接收RRC重配消息，该RRC重配消息中包括第二指示信息。RRC重配消息用于执行重配过程。
该步骤对应步骤S202，关于如何确定第二指示信息见步骤S202。
S410、响应于第二指示信息，终端设备通过CAG小区接入系统或者通过PLMN小区接入系统。
该步骤对应S203。
S411、第一网络设备向核心网设备发送初始上下文建立响应(initial context setup response)消息。
相应地，核心网设备从第一网络设备接收初始上下文建立响应消息，该初始上下文建立响应消息用于通知核心网设备建立过程已完成。
在又一种可能的实施方式中，在终端设备处于非激活态时，由于要进行数据传输或者进行RNA更新而触发RRC恢复(resume)过程。终端设备在不同类型的小区间移动(从CAG小区向PLMN小区移动，或者，从PLMN小区向CAG小区移动)时，可以通过向第一网络设备发送第一指示信息，以主动向第一网络设备请求第二指示信息，并且第一网络设备从第二网络设备(例如最近服务(last serving)网络设备)成功获取终端设备的上下文。
需要说明的是，如果终端设备在CAG小区范围内时，如果该小区的CAG ID属于终端设备的允许CAG列表(allowed CAG list)，则终端设备也不能通过该小区获取PLMN服务，除非终端设备基于定位技术、临近指示(proximity indication)或其他技术等检测到已经离开该CAG小区的覆盖范围。
如图5所示，本申请实施例提供了一种指示信息发送方法，该指示信息发送方法包括S501-S510：
S501、终端设备向第一网络设备发送RRC恢复请求(RRC resume request)消息。
相应地，第一网络设备从终端设备接收RRC恢复请求消息，该RRC恢复请求消息中包括第一指示信息。
此时，该终端设备处于RRC非激活态以及CM连接态。
该步骤对应步骤S201中第一网络设备从终端设备接收第一指示信息的相关描述。
S502、第一网络设备向第二网络设备发送获取UE上下文请求(retrieve UE context  request)消息。
相应地，第二网络设备从第一网络设备接收获取UE上下文请求消息，该获取UE上下文请求消息用于向第二网络设备请求终端设备的上下文。
S503、第二网络设备向第一网络设备发送获取UE上下文响应(retrieve UE context response)消息。
相应地，第一网络设备从第二网络设备接收获取UE上下文响应消息。
S504、第一网络设备向终端设备发送RRC恢复(RRC resume)消息。
相应地，终端设备从第一网络设备接收RRC恢复消息，该RRC恢复消息中包括第二指示信息。
此时，该终端设备处于RRC连接态以及CM连接态。
该步骤对应步骤S202，关于如何确定第二指示信息见步骤S202。
S505、响应于第二指示信息，终端设备通过CAG小区接入该系统或者通过PLMN小区接入该系统。
具体见步骤S203。
S506、终端设备向第一网络设备发送RRC恢复完成(RRC resume complete)消息。
相应地，第一网络设备从终端设备接收RRC恢复完成消息。
此时，第一网络设备和终端设备完成RRC连接的恢复。
S507、第一网络设备向第二网络设备发送Xn-U地址指示(Xn-U address indication)消息。
相应地，第二网络设备从第一网络设备接收Xn-U地址指示消息，该Xn-U地址指示消息用于指示转发地址。
S508、第二网络设备向核心网设备发送路径切换请求(path switch request)消息。
相应地，核心网设备从第二网络设备接收路径切换请求消息，该路径切换请求消息用于请求进行路径切换。
S509、核心网设备向第一网络设备发送路径切换响应(path switch response)消息。
相应地，第一网络设备从核心网设备接收路径切换响应消息。
S510、第一网络设备向第二网络设备发送UE上下文释放(UE context release)消息。
相应地，第二网络设备从第一网络设备接收UE上下文释放消息，该UE上下文释放消息用于触发第二网络设备释放终端设备的上下文。
在又一种可能的实施方式中，在终端设备处于非激活态时，由于要进行数据传输或者进行RNA更新而触发RRC恢复(resume)过程。第一网络设备可以从第二网络设备(例如最近服务网络设备)获取第一指示信息，并主动向终端设备发送第二指示信息。
如图6所示，本申请实施例提供了一种指示信息发送方法，该指示信息发送方法包括S601-S610：
S601、终端设备向第一网络设备发送RRC恢复请求(RRC resume request)消息。
相应地，第一网络设备从终端设备接收RRC恢复请求消息。
此时，该终端设备处于RRC非激活态以及CM连接态。
S602、第一网络设备向第二网络设备发送获取UE上下文请求(retrieve UE context request)消息。
相应地，第二网络设备从第一网络设备接收获取UE上下文请求消息，该获取UE上下文请求消息用于向第二网络设备请求终端设备的上下文。
S603、第二网络设备向第一网络设备发送获取UE上下文响应消息。
相应地，第一网络设备从第二网络设备接收获取UE上下文响应(retrieve UE context response)消息，该获取UE上下文响应消息中包括终端设备的上下文，终端设备的上下文中包括第一指示信息。
该步骤对应步骤S201中第一网络设备从第二网络设备接收第一指示信息的相关描述。
步骤S604-S610与步骤S504-S510相同，在此不再重复。
在又一种可能的实施方式中，在终端设备处于非激活态时，由于要进行数据传输或者进行RNA更新而触发RRC恢复(resume)过程。终端设备在不同类型的小区间移动(从CAG小区向PLMN小区移动，或者，从PLMN小区向CAG小区移动)时，可以通过向第一网络设备发送第一指示信息，以主动向第一网络设备请求第二指示信息，但是第一网络设备从第二网络设备获取终端设备的上下文失败。
如图7所示，本申请实施例提供了一种指示信息发送方法，该指示信息发送方法包括S701-S706：
步骤S701-S702与步骤S501-S502相同，在此不再重复。
S703、第二网络设备获取或验证终端设备的上下文失败，向第一网络设备发送获取UE上下文失败(retrieve UE context failure)消息。
相应地，第一网络设备从第二网络设备接收获取UE上下文失败消息。
S704、第一网络设备向终端设备发送RRC建立(RRC Setup)消息。
相应地，终端设备从第一网络设备接收RRC建立消息，该RRC建立消息中包括第二指示信息。
该步骤对应步骤S202，关于如何确定第二指示信息见步骤S202。
S705、响应于第二指示信息，终端设备通过CAG小区接入该系统或者通过PLMN小区接入该系统。
RRC建立消息用于指示终端设备执行回退以建立新的RRC连接，终端设备执行处于空闲态时的行为，例如，终端设备在下次建立RRC连接时，可以响应于第二指示信息，通过CAG小区接入系统或者通过PLMN小区接入系统。具体见步骤S203。
在又一种可能的实施方式中，在终端设备处于连接态时，终端设备向第一网络设备发送测量报告，第一网络设备根据来自终端设备的测量报告，或者，所述测量报告和终端设备的允许CAG列表确定第二指示信息，并发送给终端设备。
如图8所示，本申请实施例提供了一种指示信息发送方法，该指示信息发送方法包括S801-S806：
S801、终端设备对服务小区和邻居小区进行测量得到测量报告，并向第一网络设备发送测量报告。
关于测量报告内容见步骤S201的相关描述，在此不再重复。
S802、第一网络设备根据来自终端设备的测量报告，或者，所述测量报告和允许CAG列表确定第二指示信息。
该步骤可以参照步骤S201中针对第一网络设备根据来自终端设备的测量报告，或者，所述测量报告和允许CAG列表确定第二指示信息的相关描述，在此不再重复。
S803、第一网络设备向终端设备发送RRC释放(RRC release)消息。
相应地，终端设备从第一网络设备接收RRC释放消息，该RRC释放消息中包括第二指示信息。
S804、终端设备进入空闲态。
上文描述了本发明实施例提供的通信方法，下文将描述本发明实施例提供的第一网络设备、终端设备和核心网设备。
如图9所示，本申请实施例提供了一种第一网络设备，第一网络设备90包括：
收发模块901，用于接收第一指示信息，其中，第一指示信息用于指示为终端设备配置第二指示信息，第二指示信息用于指示终端设备仅通过封闭接入组CAG小区接入系统或者仅通过公共陆地移动网络PLMN小区接入系统。
收发模块901，还用于响应于第一指示信息，向终端设备发送第二指示信息。
在一种可能的实施方式中，收发模块901具体用于：从终端设备接收第一指示信息。
在一种可能的实施方式中，收发模块901具体用于：从第二网络设备接收第一指示信息。
在一种可能的实施方式中，收发模块901具体用于：从核心网设备接收第一指示信息。
在一种可能的实施方式中，第一网络设备还包括处理模块902，用于根据来自终端设备的测量报告，或者，测量报告和允许CAG列表确定第二指示信息，其中，测量报告至少包括服务小区的标识，以及，邻居小区的标识和测量结果；允许CAG列表包括终端设备允许接入的CAG小区的标识。
在一种可能的实施方式中，处理模块902具体用于：根据服务小区的标识确定服务小区为PLMN小区；根据邻居小区的标识确定邻居小区包括至少一个CAG小区；根据至少一个CAG小区的测量结果高于第一门限，并且至少一个CAG小区的标识属于允许CAG列表，确定第二指示信息指示终端设备仅通过CAG小区接入系统。
在一种可能的实施方式中，测量报告还包括服务小区的测量结果，处理模块902具体用于：根据服务小区的标识确定服务小区为CAG小区；根据邻居小区的标识确定邻居小区仅包括PLMN小区；根据PLMN小区的测量结果高于第二门限，服务小区的测量结果低于第三门限，确定第二指示信息指示终端设备仅通过PLMN小区接入系统。
在一种可能的实施方式中，在第一网络设备中，第一指示信息存储在终端设备的上下文中。
在一种可能的实施方式中，终端设备处于非激活态时，第一指示信息存储在终端设备的非激活接入层上下文中。
在一种可能的实施方式中，终端设备处于连接态时，第一指示信息存储在终端设备的接入层上下文中。
应理解，本发明实施例中的处理模块902可以由处理器或处理器相关电路组件实现，收发模块901可以由收发器或收发器相关电路组件实现。
如图10所示，本发明实施例还提供一种第一网络设备，该第一网络设备100包括处理器1001，存储器1002与收发器1003，其中，存储器1002中存储指令或程序，处理器1001用于执行存储器1002中存储的指令或程序。存储器1002中存储的指令或程序被执行时，该处理器1001用于执行上述实施例中处理模块902执行的操作，收发器1003用于执行上述实施例中收发模块901执行的操作。
应理解，根据本发明实施例的第一网络设备90或第一网络设备100可对应于本发明实施例的指示信息发送方法中的第一网络设备，并且第一网络设备90或第一网络设备100中的各个模块的操作和/或功能分别为了实现图2至图8中的各个方法的相应流程，为了简洁，在此不再赘述。
如图11所示，本申请实施例提供了一种终端设备，该终端设备110包括：
收发模块1101，用于从第一网络设备接收第二指示信息，第二指示信息用于指示终端设备仅通过CAG小区接入系统或者仅通过PLMN小区接入系统。
处理模块1102，用于响应于第二指示信息，通过CAG小区接入系统或者通过PLMN小区接入系统。
在一种可能的实施方式中，收发模块1101还用于：向第一网络设备发送第一指示信息，其中，第一指示信息用于指示为终端设备配置第二指示信息。
在一种可能的实施方式中，收发模块1101还用于：向第一网络设备发送测量报告，其中，测量报告至少包括服务小区的标识，以及，邻居小区的标识和测量结果，服务小区为PLMN小区，邻居小区包括至少一个CAG小区，或者，服务小区为CAG小区，邻居小区仅包括PLMN小区。
在一种可能的实施方式中，测量报告还包括服务小区的测量结果。
在一种可能的实施方式中，第一指示信息存储在终端设备的上下文中。
在一种可能的实施方式中，终端设备处于非激活态时，第一指示信息存储在终端设备的非激活接入层上下文中。
在一种可能的实施方式中，终端设备处于连接态时，第一指示信息存储在终端设备的接入层上下文中。
应理解，本发明实施例中的处理模块1102可以由处理器或处理器相关电路组件实现，收发模块1101可以由收发器或收发器相关电路组件实现。
如图12所示，本发明实施例还提供一种终端设备，该终端设备120包括处理器1201，存储器1202与收发器1203，其中，存储器1202中存储指令或程序，处理器1201用于执行存储器1202中存储的指令或程序。存储器1202中存储的指令或程序被执行时，该处理器1201用于执行上述实施例中处理模块1102执行的操作，收发器1203用于执行上述实施例中收发模块1101执行的操作。
应理解，根据本发明实施例的终端设备110或终端设备120可对应于本发明实施例的指示信息发送方法中的终端设备，并且终端设备110或终端设备120中的各个模块的操作和/或功能分别为了实现图2至图8中的各个方法的相应流程，为了简洁，在此不再赘述。
如图13所示，本申请实施例提供了一种核心网设备，该核心网设备130包括：
处理模块1301，用于确定第一指示信息，其中，第一指示信息用于指示为通信装置配置第二指示信息，第二指示信息用于指示通信装置仅通过封闭接入组CAG小区接入系统或者仅通过公共陆地移动网络PLMN小区接入系统；
收发模块1302，用于向第一网络设备发送第一指示信息。
应理解，本发明实施例中的处理模块1301可以由处理器或处理器相关电路组件实现，收发模块1302可以由网络接口或网络接口相关电路组件实现。
如图14所示，本发明实施例还提供一种核心网设备，该核心网设备140包括处理器1401，存储器1402与网络接口1403，其中，存储器1402中存储指令或程序，处理器1401用于执行存储器1402中存储的指令或程序。存储器1402中存储的指令或程序被执行时，该处理器1401用于执行上述实施例中处理模块1301执行的操作，网络接口1403用于执行上述实施例中收发模块1302执行的操作。
应理解，根据本发明实施例的核心网设备130或核心网设备140可对应于本发明实施例的指示信息发送方法中的核心网设备，并且核心网设备130或核心网设备140中的各个模块的操作和/或功能分别为了实现图2至图8中的各个方法的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供一种计算机可读存储介质，计算机可读存储介质存储有计算机程序，当计算机程序被处理器运行时，可以实现上述方法实施例提供的指示信息发送方法中与第一网络设备相关的流程。
本申请实施例还提供一种计算机可读存储介质，计算机可读存储介质存储有计算机程序，当计算机程序被处理器运行时，可以实现上述方法实施例提供的指示信息发送方法中与终端设备相关的流程。
本申请实施例还提供一种计算机可读存储介质，计算机可读存储介质存储有计算机程序，当计算机程序被处理器运行时，可以实现上述方法实施例提供的指示信息发送方法中与核心网设备相关的流程。
本申请实施例还提供一种通信装置，该通信装置可以是第一网络设备也可以是电路。该通信装置可以用于执行上述方法实施例中由第一网络设备所执行的动作。
如图15所示，通信装置150包括一个或多个射频单元，如远端射频单元(remote radio unit，RRU)1501和一个或多个基带单元(baseband unit，BBU)(也可称为数字单元，digital unit，DU)1502。所述RRU 1501可以称为收发模块，与图9中的收发模块901对应，可选地，该收发模块还可以称为收发机、收发电路、或者收发器等等，其可以包括至少一个天线1503和射频单元1504。所述RRU 1501部分主要用于射频信号的收发以及射频信号与基带信号的转换，例如用于向终端设备发送指示信息。所述BBU 1502部分主要用于进行基带处理，对基站进行控制等。所述RRU 1501与BBU 1502可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。
所述BBU 1502为基站的控制中心，也可以称为处理模块，可以与图9中的处理模块902对应，主要用于完成基带处理功能，如信道编码，复用，调制，扩频等等。例如所述BBU 1502可以用于控制基站执行上述方法实施例中关于第一网络设备的操作流程。
在一个示例中，所述BBU 1502可以由一个或多个单板构成，多个单板可以共同支持单一接入制式的无线接入网(如LTE网)，也可以分别支持不同接入制式的无线接入网(如LTE网、5G网或其他网)。所述BBU 1502还包括存储器1505和处理器1506，处理器1506与存储器1505相连。所述存储器1505用以存储计算机程序和数据。所述处理器1506用于执行存储器1505中存储的计算机程序，例如用于控制基站执行上述方法实施例中关于第一网络设备的操作流程。所述存储器1505和处理器1506可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
本申请实施例还提供一种通信装置，该通信装置可以是终端设备也可以是电路。该通信装置可以用于执行上述方法实施例中由终端设备所执行的动作。
如图16所示，以手机为例，通信装置160包括处理器1601、存储器1602、射频电路1603、天线1604以及输入输出装置1605。处理器1601与存储器1602相连。存储器1602主要用于存储计算机程序和数据。处理器1601主要用于执行存储器1602中存储的计算机程序，例如对通信协议以及通信数据进行处理，以及对终端设备进行控制等。射频电路1603主要用于基带信号与射频信号的转换以及对射频信号的处理。天线1604主要用于收发电磁波形式的射频信号。输入输出装置1605包括例如触摸屏、显示屏、键盘等，主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的终端设备可以不具有输入输出装置。
当需要发送数据时，处理器1601对待发送的数据进行基带处理后，输出基带信号至射频电路1603，射频电路1603将基带信号进行射频处理后将射频信号通过天线1604以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路1603通过天线1604接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器1601，处理器1601将基带信号转换为数据并对该数据进行处理。为便于说明，图16中仅示出了一个存储器和处理器。在实际的终端设备产品中，可以存在一个或多个处理器和一个或多个存储器。存储器1602也可以称为存储介质或者存储设备等。存储器1602可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。
射频电路1603可以与图11中的收发模块1101相对应，用于执行上述方法实施例中终端设备侧的发送操作和接收操作，处理器1601可以与图11中的处理模块1102相对应，用于执行上述方法实施例中终端设备上除了收发操作之外的其他操作。
本申请实施例还提供一种通信装置，该通信装置可以是核心网设备也可以是电路。该通信装置可以用于执行上述方法实施例中由核心网设备所执行的动作。
如图17所示，通信装置170包括：至少一个处理器1701、至少一个存储器1702、至少一个通信接口1703。其中，至少一个处理器1701、至少一个存储器1702、至少一个通信接口1703可以通过总线相连。
存储器1702，用于存储计算机程序代码。处理器1701，用于执行存储器1702中存储的计算机程序，以执行上述各方法实施例中核心网设备的功能。通信接口1703，用于与其他通信装置例如第一网络设备之间进行通信。该通信接口1703可以以有线或无线通信方式进行通信。
通信接口1703可以与图13中的收发模块1302相对应，用于执行上述方法实施例中核心网设备的发送操作，处理器1701可以与图13中的处理模块1301相对应，用于执行上述方法实施例中核心网设备上除了收发操作之外的其他操作。
本申请实施例中提及的处理器可以是中央处理单元(central processing unit，CPU)，还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)可以集成在处理器中。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、设备和方法，可以通过其它的方式实现。例如，以上所描述的设备实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些 接口，设备或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(Digital Subscriber Line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质(例如，DVD)、或者半导体介质(例如固态硬盘(Solid State Disk，SSD))等。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (43)

  1. 一种第一网络设备，其特征在于，包括：
    收发模块，用于接收第一指示信息，其中，所述第一指示信息用于指示为通信装置配置第二指示信息，所述第二指示信息用于指示所述通信装置仅通过封闭接入组CAG小区接入系统或者仅通过公共陆地移动网络PLMN小区接入所述系统；
    所述收发模块，还用于响应于所述第一指示信息，向所述通信装置发送所述第二指示信息。
  2. 根据权利要求1所述的第一网络设备，其特征在于，所述收发模块具体用于：
    从所述通信装置接收所述第一指示信息。
  3. 根据权利要求1所述的第一网络设备，其特征在于，所述收发模块具体用于：
    从第二网络设备接收所述第一指示信息。
  4. 根据权利要求1所述的第一网络设备，其特征在于，所述收发模块具体用于：
    从核心网设备接收所述第一指示信息。
  5. 根据权利要求1-4任一项所述的第一网络设备，其特征在于，还包括处理模块，
    用于根据来自所述通信装置的测量报告，或者，所述测量报告和允许CAG列表确定所述第二指示信息，其中，所述测量报告至少包括服务小区的标识，以及，邻居小区的标识和测量结果；所述允许CAG列表包括所述通信装置允许接入的CAG小区的标识。
  6. 根据权利要求5所述的第一网络设备，其特征在于，所述处理模块具体用于：
    根据所述服务小区的标识确定所述服务小区为PLMN小区；
    根据所述邻居小区的标识确定所述邻居小区包括至少一个CAG小区；
    根据所述至少一个CAG小区的测量结果高于第一门限，并且所述至少一个CAG小区的标识属于所述允许CAG列表，确定所述第二指示信息指示所述通信装置仅通过CAG小区接入系统。
  7. 根据权利要求5所述的第一网络设备，其特征在于，所述测量报告还包括所述服务小区的测量结果，所述处理模块具体用于：
    根据所述服务小区的标识确定所述服务小区为CAG小区；
    根据所述邻居小区的标识确定所述邻居小区仅包括PLMN小区；
    根据所述PLMN小区的测量结果高于第二门限，所述服务小区的测量结果低于第三门限，确定所述第二指示信息指示所述通信装置仅通过PLMN小区接入系统。
  8. 根据权利要求1-7任一项所述的第一网络设备，其特征在于，在所述第一网络设备中，所述第一指示信息存储在所述通信装置的上下文中。
  9. 根据权利要求8所述的第一网络设备，其特征在于，所述通信装置处于非激活态时，所述第一指示信息存储在所述通信装置的非激活接入层上下文中。
  10. 根据权利要求8所述的第一网络设备，其特征在于，所述通信装置处于连接态时，所述第一指示信息存储在所述通信装置的接入层上下文中。
  11. 一种通信装置，其特征在于，包括：
    收发模块，用于从第一网络设备接收第二指示信息，所述第二指示信息用于指示 通信装置仅通过CAG小区接入系统或者仅通过PLMN小区接入所述系统；
    处理模块，用于响应于所述第二指示信息，通过CAG小区接入所述系统或者通过PLMN小区接入所述系统。
  12. 根据权利要求11所述的通信装置，其特征在于，所述收发模块还用于：
    向所述第一网络设备发送第一指示信息，其中，所述第一指示信息用于指示为所述通信装置配置所述第二指示信息。
  13. 根据权利要求11所述的通信装置，其特征在于，所述收发模块还用于：
    向所述第一网络设备发送测量报告，其中，所述测量报告至少包括服务小区的标识，以及，邻居小区的标识和测量结果，所述服务小区为PLMN小区，所述邻居小区包括至少一个CAG小区，或者，所述服务小区为CAG小区，所述邻居小区仅包括PLMN小区。
  14. 根据权利要求13所述的通信装置，其特征在于，所述测量报告还包括所述服务小区的测量结果。
  15. 根据权利要求12所述的通信装置，其特征在于，所述第一指示信息存储在所述通信装置的上下文中。
  16. 根据权利要求15所述的通信装置，其特征在于，所述通信装置处于非激活态时，所述第一指示信息存储在所述通信装置的非激活接入层上下文中。
  17. 根据权利要求15所述的通信装置，其特征在于，所述通信装置处于连接态时，所述第一指示信息存储在所述通信装置的接入层上下文中。
  18. 一种核心网设备，其特征在于，包括：
    处理模块，用于确定第一指示信息，其中，所述第一指示信息用于指示为通信装置配置第二指示信息，所述第二指示信息用于指示所述通信装置仅通过封闭接入组CAG小区接入系统或者仅通过公共陆地移动网络PLMN小区接入所述系统；
    收发模块，用于向第一网络设备发送所述第一指示信息。
  19. 一种指示信息发送方法，其特征在于，包括：
    第一网络设备接收第一指示信息，其中，所述第一指示信息用于指示为通信装置配置第二指示信息，所述第二指示信息用于指示所述通信装置仅通过封闭接入组CAG小区接入系统或者仅通过公共陆地移动网络PLMN小区接入所述系统；
    响应于所述第一指示信息，所述第一网络设备向所述通信装置发送所述第二指示信息。
  20. 根据权利要求19所述的方法，其特征在于，所述第一网络设备接收第一指示信息，包括：
    所述第一网络设备从所述通信装置接收所述第一指示信息。
  21. 根据权利要求19所述的方法，其特征在于，所述第一网络设备接收第一指示信息，包括：
    所述第一网络设备从第二网络设备接收所述第一指示信息。
  22. 根据权利要求19所述的方法，其特征在于，所述第一网络设备接收第一指示信息，包括：
    所述第一网络设备从核心网设备接收所述第一指示信息。
  23. 根据权利要求19-22任一项所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备根据来自所述通信装置的测量报告，或者，所述测量报告和允许CAG列表确定所述第二指示信息，其中，所述测量报告至少包括服务小区的标识，以及，邻居小区的标识和测量结果；所述允许CAG列表包括所述通信装置允许接入的CAG小区的标识。
  24. 根据权利要求23所述的方法，其特征在于，所述第一网络设备根据来自所述通信装置的测量报告，或者，所述测量报告和允许CAG列表确定所述第二指示信息，包括：
    所述第一网络设备根据所述服务小区的标识确定所述服务小区为PLMN小区；
    所述第一网络设备根据所述邻居小区的标识确定所述邻居小区包括至少一个CAG小区；
    所述第一网络设备根据所述至少一个CAG小区的测量结果高于第一门限，并且所述至少一个CAG小区的标识属于所述允许CAG列表，确定所述第二指示信息指示所述通信装置仅通过CAG小区接入系统。
  25. 根据权利要求23所述的方法，其特征在于，所述测量报告还包括所述服务小区的测量结果，所述第一网络设备根据来自所述通信装置的测量报告，或者，所述测量报告和允许CAG列表确定所述第二指示信息，包括：
    所述第一网络设备根据所述服务小区的标识确定所述服务小区为CAG小区；
    所述第一网络设备根据所述邻居小区的标识确定所述邻居小区仅包括PLMN小区；
    所述第一网络设备根据所述PLMN小区的测量结果高于第二门限，所述服务小区的测量结果低于第三门限，确定所述第二指示信息指示所述通信装置仅通过PLMN小区接入系统。
  26. 根据权利要求19-25任一项所述的方法，其特征在于，在所述第一网络设备中，所述第一指示信息存储在所述通信装置的上下文中。
  27. 根据权利要求26所述的方法，其特征在于，所述通信装置处于非激活态时，所述第一指示信息存储在所述通信装置的非激活接入层上下文中。
  28. 根据权利要求26所述的方法，其特征在于，所述通信装置处于连接态时，所述第一指示信息存储在所述通信装置的接入层上下文中。
  29. 一种指示信息发送方法，其特征在于，包括：
    从第一网络设备接收第二指示信息，所述第二指示信息用于指示通信装置仅通过CAG小区接入系统或者仅通过PLMN小区接入所述系统；
    响应于所述第二指示信息，通过CAG小区接入所述系统或者通过PLMN小区接入所述系统。
  30. 根据权利要求29所述的方法，其特征在于，所述方法还包括：
    向所述第一网络设备发送第一指示信息，其中，所述第一指示信息用于指示为所述通信装置配置所述第二指示信息。
  31. 根据权利要求29所述的方法，其特征在于，所述方法还包括：
    向所述第一网络设备发送测量报告，其中，所述测量报告至少包括服务小区的标 识，以及，邻居小区的标识和测量结果，所述服务小区为PLMN小区，所述邻居小区包括至少一个CAG小区，或者，所述服务小区为CAG小区，所述邻居小区仅包括PLMN小区。
  32. 根据权利要求31所述的方法，其特征在于，所述测量报告还包括所述服务小区的测量结果。
  33. 根据权利要求30所述的方法，其特征在于，所述第一指示信息存储在所述通信装置的上下文中。
  34. 根据权利要求33所述的方法，其特征在于，所述通信装置处于非激活态时，所述第一指示信息存储在所述通信装置的非激活接入层上下文中。
  35. 根据权利要求33所述的方法，其特征在于，所述通信装置处于连接态时，所述第一指示信息存储在所述通信装置的接入层上下文中。
  36. 一种指示信息发送方法，其特征在于，包括：
    核心网设备确定第一指示信息，其中，所述第一指示信息用于指示为通信装置配置第二指示信息，所述第二指示信息用于指示所述通信装置仅通过封闭接入组CAG小区接入系统或者仅通过公共陆地移动网络PLMN小区接入所述系统；
    所述核心网设备向第一网络设备发送所述第一指示信息。
  37. 一种通信装置，其特征在于，包括处理器，所述处理器与存储器相连，所述存储器用于存储计算机程序，所述处理器用于执行所述存储器中存储的计算机程序，以使得所述装置执行如权利要求19至28中任一项所述的方法。
  38. 一种通信装置，其特征在于，包括处理器，所述处理器与存储器相连，所述存储器用于存储计算机程序，所述处理器用于执行所述存储器中存储的计算机程序，以使得所述装置执行如权利要求29至35中任一项所述的方法。
  39. 一种通信装置，其特征在于，包括处理器，所述处理器与存储器相连，所述存储器用于存储计算机程序，所述处理器用于执行所述存储器中存储的计算机程序，以使得所述装置执行如权利要求36所述的方法。
  40. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，当所述计算机程序被运行时，实现如权利要求19至28中任一项所述的方法。
  41. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，当所述计算机程序被运行时，实现如权利要求29至35中任一项所述的方法。
  42. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，当所述计算机程序被运行时，实现如权利要求36所述的方法。
  43. 一种通信系统，其特征在于，包括权利要求1-10任一项所述的第一网络设备，权利要求11-17任一项所述的通信装置，以及如权利要求18所述的核心网设备。
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