Wireless communication methods, terminal devices, core network elements, and base stations

Abstract

Provided in the present application are wireless communication methods, and devices. A method comprises: a terminal device sending first information to a first network element of a core network, wherein the first information is used for indicating that the terminal device has the capability of accessing a CAG cell and a CSG cell. In the embodiments of the present application, the terminal device is required to report, to a network element (i.e., the first network element) of the core network, the capability of accessing a CAG cell and a CSG cell, thereby facilitating a handover between a CAG cell and a CSG cell.

Description

Wireless communication method, terminal equipment, core network element and base station Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal equipment, core network element, and base station. Background Art

[0002] Some communication systems can implement virtual private networks (or non-public networks) on public networks. In some scenarios, it is necessary to restrict terminal devices from accessing private networks. For example, for a private network allocated to an enterprise, when the terminal device moves out of the wireless area where the enterprise is located, the enterprise hopes that the terminal device cannot access the private network in other areas. Therefore, the communication system introduces the concepts of closed access group (CAG) cells and closed subscriber group (CSG) cells to perform cell-level control on access to private networks. On the basis of introducing CAG cells and CSG cells, how to support terminal devices to switch between CAG cells and CSG cells to ensure business continuity is a problem that needs to be solved.

[0003] Summary of the Invention

[0004] The present application provides a wireless communication method, terminal equipment, core network element, and base station. The following introduces various aspects involved in the present application.

[0005] In a first aspect, a method for wireless communication is provided, the method comprising: a terminal device sends first information to a first network element of a core network, the first information being used to indicate that the terminal device has the ability to access a CAG cell and a CSG cell.

[0006] In a second aspect, a method for wireless communication is provided, the method comprising: a first network element of a core network receives first information sent by a terminal device, the first information being used to indicate that the terminal device has the ability to access a CAG cell and a CSG cell.

[0007] According to a third aspect, a method for wireless communication is provided, which includes: a source base station receives third information, the third information is sent by a terminal device or a first network element in a first cell, and the third information is used to determine a second cell that the terminal device is allowed to access; wherein the first cell is a CAG cell and the second cell is a CSG cell; or, the first cell is a CSG cell and the second cell is a CAG cell.

[0008] In a fourth aspect, a terminal device is provided, including: a first sending unit, used to send first information to a first network element of a core network, where the first information is used to indicate that the terminal device has the ability to access a CAG cell and a CSG cell.

[0009] In a fifth aspect, a core network network element is provided, which is a first network element and includes: a first receiving unit for receiving first information sent by a terminal device, the first information being used to indicate that the terminal device has the ability to access a CAG cell and a CSG cell.

[0010] In the sixth aspect, a base station is provided, including: a first receiving unit, used to receive third information, the third information is sent by a terminal device or a first network element in a first cell, and the third information is used to determine a second cell that the terminal device is allowed to access; wherein, the first cell is a CAG cell and the second cell is a CSG cell; or, the first cell is a CSG cell and the second cell is a CAG cell.

[0011] In a seventh aspect, a terminal device is provided, comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes the method in the first aspect.

[0012] In an eighth aspect, a core network element is provided, comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the core network element executes the method in the second aspect.

[0013] In the ninth aspect, an embodiment of the present application provides a base station, including a processor and a memory, the memory being used to store one or more computer programs, and the processor being used to call the computer program in the memory so that the base station executes the method in the third aspect.

[0014] In a tenth aspect, an embodiment of the present application provides a communication system, which includes one or more of the above-mentioned core network elements, terminal devices, and base stations. In another possible design, the system may also include other devices that interact with the core network elements, terminal devices, and base stations provided in the embodiments of the present application.

[0015] In the eleventh aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is used to execute part or all of the steps in the methods of the above aspects.

[0016] In a twelfth aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to perform some or all of the steps of the methods of each aspect described above. In some implementations, the computer program product may be a software installation package.

[0017] In the thirteenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0018] The embodiment of the present application requires the terminal device to report the ability to access the CAG cell and the CSG cell to the network element of the core network (ie, the first network element), thereby facilitating switching between the CAG cell and the CSG cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is an exemplary diagram of a wireless communication system to which embodiments of the present application may be applied.

[0020] FIG2 is a flow chart of a communication method provided in one embodiment of the present application.

[0021] FIG3 is a flow chart of a communication method provided in another embodiment of the present application.

[0022] FIG4 is a flow chart of a communication method provided in another embodiment of the present application.

[0023] FIG5 is a flow chart of a communication method provided in another embodiment of the present application.

[0024] FIG6 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

[0025] FIG7 is a schematic structural diagram of a core network element provided in an embodiment of the present application.

[0026] FIG8 is a schematic structural diagram of a base station provided in an embodiment of the present application.

[0027] FIG9 is a schematic structural diagram of a device for communication according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] The technical solution in this application will be described below with reference to the accompanying drawings.

[0029] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, etc. The technical solutions provided by the present application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0030] First, a brief introduction to the network architecture applicable to this application is given.

[0031] As an example, Figure 1 shows an example diagram of a network architecture. The network architecture shown in Figure 1 takes the 5G system as an example. Among them, one of the most important features of the 5G network architecture is the service-oriented architecture, that is, the core network element (service provider) can provide specific services and make them available to other network elements (consumers) through a defined application programming interface (API). The network architecture can include three parts: the terminal device part, the data network (DN) part, and the operator network part. Among them, the operator network may include one or more of the following functional entities: access network (AN) equipment, user plane function (UPF) entity, access and mobility management function (AMF) entity, session management function (SMF) entity, policy control function (PCF) entity, application function (AF) entity, network slice selection function (NSSF) entity, authentication and authorization service function (AUSF) entity, unified data management (UDM) entity, network exposure function (NEF) entity, network repository function (NRF) entity, network slice-specific authentication and authorization function (NSSAAF) entity, etc. In the above-mentioned operator network, the part other than the access network equipment part can be called the core network part, and the functional entities of the core network part can be called core network equipment.

[0032] The following is an illustrative description of the functions of each part or functional entity involved in the network architecture in the 5G network.

[0033] Terminal device: A terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user apparatus. In the embodiments of the present application, a terminal device may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects, and machines, such as a handheld device or vehicle-mounted device with wireless connectivity. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and smart home devices communicate without relaying the communication signal through the base station.

[0034] Access network equipment: Access network equipment provides network access for authorized terminal devices in a specific area and can utilize transmission channels of varying quality based on the terminal device's level and service requirements. Access network equipment manages wireless resources, provides access services to terminal devices, and forwards control signals and data between terminal devices and the core network.

[0035] An access network device may be a device in a wireless network. An access network device may also be referred to as a radio access network (RAN) device or a network device. For example, an access network device may be a base station. The access network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station can also refer to a communication module, a modem or a chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in device-to-device D2D, vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the access network device.

[0036] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0037] In some deployments, the access network device in the embodiments of the present application may refer to a CU or a DU, or the access network device may include a CU and a DU. The gNB may also include an AAU.

[0038] The access network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the access network equipment and terminal equipment are located.

[0039] UPF entity: UPF is the user plane function in the core network, which can be responsible for forwarding and receiving user data (such as business data flow) in the terminal device. For example, UPF can receive user data from DN and transmit it to the terminal device through the access network device; or, UPF can also receive user data from the terminal device through the access network device and then forward it to DN. The transmission resources and scheduling functions that provide services to terminal devices in UPF are managed and controlled by SMF. The bearer between the terminal and the UPF network element may include: the user plane connection between the UPF network element and the access network device, and the establishment of a channel between the access network device and the terminal. Among them, the user plane connection is a QoS flow that can be established between the UPF network element and the access network device to transmit data.

[0040] AMF entity: AMF is the mobility management function in the core network. It can be used to implement other functions of the mobility management entity (MME) in addition to session management, such as lawful interception or access authorization (or authentication). In some embodiments, in addition to performing mobility management on terminal devices, the AMF can also be responsible for forwarding session management related messages between terminal devices and SMF.

[0041] SMF entity: SMF is the session management function in the core network, which is mainly responsible for session management, Internet protocol (IP) address allocation and management of terminal devices, selection of endpoints for manageable user plane functions, policy control, or charging function interfaces, downlink data notification, and configuration of routing information for user plane functions.

[0042] PCF entity: PCF is the policy management function in the core network, which is responsible for formulating policies related to mobility management, session management, and billing for terminal devices. Specifically, PCF can provide policy rule information to functional entities of the control plane (such as AMF and SMF entities) to manage and control mobility management and session management of terminal devices.

[0043] AF entity: AF mainly supports interaction with the 3rd generation partnership project (3GPP) core network to provide services, for example, influencing data routing decisions, policy control functions, or providing some third-party services to the network side. In other words, AF can be mainly used to convey the requirements of the application side to the network side. In some embodiments, AF can be understood as a third-party server, such as an application server in the Internet, which provides relevant business information, including providing service quality requirement information corresponding to the business to PCF, and sending user plane data information of the business to A-UPF. In some embodiments, AF can also be a service provider (content provider, CP).

[0044] DN: A DN is a network used to transmit data. It can be a private network, such as a local area network (LAN), an external network not controlled by a carrier, such as the internet, or a proprietary network deployed jointly with carriers, such as the network that provides IP multimedia core network subsystem (IMS) services.

[0045] NSSF entity: NSSF is the network slice selection function in the core network. The functions it supports include: selecting a set of network slice instances to serve the UE; determining the allowed network slice selection assistance information (NSSAI) and, when necessary, determining the mapping to the contracted single-network slice selection assistance information (S-NSSAI); determining the configured NSSAI and, when necessary, determining the mapping to the contracted S-NSSAI; determining the set of AMFs that may be used to query the UE, or determining a list of candidate AMFs based on the configuration.

[0046] AUSF can be used to receive AMF's request for terminal authentication, request a key from UDM, and then forward the issued key to AMF for authentication processing.

[0047] UDM can include functions such as the generation and storage of user contract data, management of authentication data, and support interaction with external third-party servers.

[0048] NEF can be used for capability exposure. That is, based on NEF, network capabilities can be exported to external networks. External, untrusted applications can access core network data through NEF to ensure network security. NEF can also provide external application QoS capability exposure, event subscription, and AF request distribution.

[0049] NRF is used to register, manage, and monitor the status of core network elements, enabling automated management of core network elements. Upon startup, a core network element must register with the NRF before it can provide services. Registration information may include the core network element's type, address, and service list.

[0050] In addition, 5G networks have added a network data analytics function (NWDAF) to the core network. Based on NWDAF, data can be collected from various core network elements and network management systems, and big data statistics and analysis or intelligent data analysis can be performed to obtain network-side analysis or prediction data, thereby assisting each network element to more effectively control terminal device access based on the data analysis results.

[0051] In some embodiments, the network architecture shown in FIG1 can be divided into a user plane and a control plane, wherein the user plane can be used to transmit data, such as data transmission through a user plane functional network element, and the control plane can be used to transmit signaling. For example, the portion above the dotted line in FIG1 can be referred to as the control plane, and the portion below the dotted line can be referred to as the user plane.

[0052] It should be understood that the above functional entities in the core network can also be referred to as network elements, and this application is not limited to this. For example, the UPF entity can also be referred to as a UPF network element, and the AMF entity can also be referred to as an AMF network element, etc.

[0053] It should also be understood that in some embodiments, the xx functional entity or xx network element may be directly referred to as xx. For example, the UPF entity (or UPF network element) may be referred to as UPF, and the AMF entity (or AMF network element) may be referred to as AMF. For the sake of convenience, xx (such as UPF, AMF, etc.) mentioned in the embodiments of this application may refer to the xx entity or xx network element, which will not be repeated hereafter.

[0054] In the network architecture shown in Figure 1, various components or functional entities can communicate with each other through interfaces. For example, a terminal device can establish an access stratum (AS) connection with the AN via the Uu interface, exchanging AS messages and wireless data transmission. A terminal device can establish a non-access stratum (NAS) connection with the AMF via the N1 interface, exchanging NAS messages. The AN can connect to the AMF via the N2 interface to transmit radio bearer control information from the core network to the AN. The UPF can transmit data with the AN via the N3 interface and with the DN via the N6 interface. The interfaces connecting other components or functional entities can be found in Figure 1 and will not be detailed here.

[0055] It should be understood that the network architecture shown above is only an exemplary illustration, and the network architecture applicable to the embodiments of the present application is not limited to this. Any network architecture that can realize the functions of the above-mentioned functional entities is applicable to the embodiments of the present application.

[0056] It should be understood that the access network equipment, AMF, SMF, UPF, and PCF shown in Figure 1 are just names, and the names do not limit the equipment themselves. In 5G networks and other future networks, the entities corresponding to the access network equipment, AMF, SMF, UPF, and PCF may also have other names, and this embodiment of the application does not specifically limit this.

[0057] It should be understood that the interface names between the functional entities shown in Figure 1 are only an example. In the specific implementation, the interface names between the functional entities can also be other names, such as the interface names between the functional entities in the 6G network. The embodiments of the present application do not make specific limitations on this.

[0058] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0059] It should be understood that the network architecture described in the embodiments of the present application is intended to more clearly illustrate the technical solutions of the embodiments of the present application, and does not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art will know that with the evolution of the network architecture, the embodiments of the present application may also be applicable to similar technical problems.

[0060] Some communication systems support a public network integrated non-public network (PNI-NPN). A PNI-NPN is a non-public network (NPN) implemented through a public land mobile network (PLMN), or in other words, a virtual private network implemented on a public network. Implementing a PNI-NPN may include assigning a dedicated data network name (DNN) to the private network or assigning one or more dedicated S-NSSAIs to the private network.

[0061] Similar to 5G public networks, 5G private networks can also use slicing. Using slicing in 5G private networks is equivalent to isolating private networks based on service types within a virtual private network. Because PNI-NPN is implemented on the public PLMN, to use PNI-NPN, the UE must first subscribe to the PLMN network to access the PNI-NPN implemented on that PLMN network.

[0062] For private networks, it is sometimes desirable to deny or restrict UE access. For example, for a private network slice allocated to an enterprise, if a UE moves out of the enterprise's wireless coverage area, the enterprise may wish to restrict the UE's access, preventing the UE from accessing the enterprise's private network slice in other areas. However, network slicing alone cannot restrict UE access to the private network, resulting in the UE still being able to access the NPN network in other wireless coverage areas.

[0063] To address these issues, the CAG feature was introduced to control access to private networks. CAG identifies a group of UEs permitted to access the CAG cell. This allows CAG to control access at the cell level, rather than the tracking area (TA) level, thereby controlling UE access to the private network at a more granular level. The following describes some of the relevant concepts of the CAG feature.

[0064] In a PNI-NPN network, the CAG can prevent UEs not permitted to use the NPN network from selecting and accessing CAG cells. A PNI-NPN network can be identified by the combination of the PLMN ID and the CAG ID. This combination of the PLMN ID and the CAG ID can be used to identify a private network. Furthermore, the CAG can be used to subscribe to UE mobility restriction data.

[0065] The CAG ID identifies a specific CAG. This identifier is unique within the entire PLMN ID range. Only CAG members can obtain normal communication services in the CAG cell. For example, if a CAG cell is established for users of a company's private network, only users of that company can use the CAG cell.

[0066] A CAG cell can be associated with a CAG ID. A CAG cell can broadcast one or more CAG IDs in the PLMN. A cell can broadcast up to 12 CAG IDs.

[0067] Each PLMN has a list of CAG IDs that the UE is allowed to access (allowed CAG list). The 5G network will send the allowed CAG list to the UE through NAS signaling. The allowed CAG list will be saved as subscription data by one or more network elements in the communication system. For example, when the network implements CAG services, the allowed CAG list will be saved in the UDM, AMF, next generation radio access network (NG-RAN), and UE.

[0068] The CAG mentioned above is currently mainly used in 5G communication networks. In 4G communication networks, CSG can control UE access. The concepts and functions of CSG and CAG are basically the same.

[0069] While UE access control can be implemented based on CAG and CSG, some technical issues remain to be addressed. For example, there is currently no clear solution for handover between CAG and CSG cells. Supporting handover between CAG and CSG cells is particularly important in Femto deployments. This article uses a Femto scenario as an example.

[0070] Femto is an ultra-small, low-power mobile base station device that can be used in indoor environments such as homes, offices, or small commercial areas. Deploying Femto will bring many benefits to 5G networks. For example, 5G NR Femto can use higher frequency bands (such as frequency range 2 (FR2) bands) to extend coverage and improve 5G indoor coverage. For another example, 5G NR Femto can offload traffic from the macro network, achieve better voice quality, and better support enterprise mobility. To support the deployment of 4G / 5G Femto, Femto can be connected to the fifth generation core (5GC) to implement CAG cells, or Femto can be connected to the evolved packet core (EPC) to implement CSG cells. When a terminal device in a CAG cell moves to a CSG cell, or when a terminal device in a CSG cell moves to a CAG cell, how to support 4G / 5G interoperability and ensure service continuity is a problem that needs to be solved.

[0071] To address the above-mentioned issues, an embodiment of the present application provides a wireless communication method. In this wireless communication method, a first network element of a core network (such as a mobility management network element) receives the capabilities of a terminal device to access CAG cells and CSG cells reported by the terminal device, and determines the set of CAGs and / or CSGs that the terminal device is allowed to access based on the above-mentioned capabilities. Based on the set of CAGs and / or CSGs, the terminal device can determine the CAG cells and / or CSG cells that it is allowed to access, thereby enabling switching between CAG cells and CSG cells, thereby helping to ensure the communication quality of the communication system.

[0072] The communication method provided in the embodiment of the present application is described in detail below in conjunction with Figure 2.

[0073] Figure 2 is a flow chart of a communication method according to an embodiment of the present application. The steps in the communication method are described in detail below.

[0074] In step S210, the terminal device sends first information to a first network element of the core network. The first information is used to indicate that the terminal device has the ability to access a CAG cell and a CSG cell.

[0075] In some embodiments, the first information may be carried in a registration request message. For example, the first information may be carried in a 5G mobile management (MM) capability parameter in the registration request message.

[0076] The embodiment of the present application does not specifically limit the type of the first network element. For example, the first network element may be a mobility management network element. The mobility management network element may be, for example, an AMF or an MME.

[0077] In some embodiments, the terminal device may receive second information sent by the first network element. The second information is used to indicate a set of CAGs and / or CSGs that the terminal device is allowed to access. The set of CAGs and / or CSGs may be, for example, a list of CAGs and / or CSGs.

[0078] In some embodiments, a set of CAGs and / or CSGs may include one or more CAG IDs and / or one or more CSG IDs.

[0079] In some embodiments, the second information may be carried in a registration accept message.

[0080] In some embodiments, the second information may be determined by the first network element based on the subscription information and the first information.

[0081] In some embodiments, the first network element may receive the subscription information of the terminal device. For example, the first network element may receive the subscription information of the terminal device from a second network element of the core network. The second network element may be, for example, a UDM.

[0082] The subscription information may include, for example, one or more of the following: CAG information and / or CSG information that the terminal device is allowed to use, and information indicating whether the terminal device is only allowed to access the communication network through CAG and / or CSG. The subscription information may be defined in the following table, for example.

[0083] As an example, the CAG ID and CSG ID that the terminal device is allowed to access can be determined based on the terminal device's ability to access the CAG cell and the CSG cell, as well as the subscription data of the terminal device.

[0084] In some embodiments, the first network element may send the second information to the base station.

[0085] In an embodiment of the present application, the terminal device can obtain the set of CAG and / or CSG allowed to be accessed through the received second information, thereby facilitating switching between CAG cells and CSG cells.

[0086] In some embodiments, when the terminal device is located in the first cell, the terminal device may determine third information based on the second information. The third information is used to indicate or determine the second cell that the terminal device is allowed to access.

[0087] The embodiments of the present application do not specifically limit the first cell and the second cell. For example, the first cell may be a CAG cell, and the second cell may be a CSG cell. For another example, the first cell may be a CSG cell, and the second cell may be a CAG cell.

[0088] In some embodiments, the third information may be used to indicate the first identifier associated with the second cell.

[0089] The embodiment of the present application does not specifically limit the first identifier. The first identifier can be a CSG ID or a CAG ID. For example, if the second cell is a CSG cell, then the first identifier is the CSG ID; or if the second cell is a CAG cell, then the first identifier is the CAG ID.

[0090] In some embodiments, associating the second cell with the first identifier may include: a CSG ID or a CAG ID has a corresponding relationship with the cell ID.

[0091] In some embodiments, the terminal device determining the third information based on the second information may include: the terminal device determining the third information based on the second information and the fourth information.

[0092] In some embodiments, the fourth information may include CAG information and / or CSG information supported by neighboring base stations. For example, if the second cell is a CSG cell, the fourth information may include CSG information supported by neighboring base stations of the source base station; or, if the second cell is a CAG cell, the fourth information may include CAG information supported by neighboring base stations of the source base station.

[0093] In some embodiments, the terminal device may send third information to the source base station.

[0094] In some embodiments, the source base station determines the cell identifier of the second cell based on the first identifier; then, the source base station determines the target base station based on the cell identifier of the second cell; and finally, the source base station sends a handover request to the target base station. The handover request is used to handover the terminal device to the second cell.

[0095] In an embodiment of the present application, a terminal device can confirm that a second cell is allowed to be accessed, and the identification information of the second cell can be sent to the source base station, so that the source base station can determine the target base station based on the identification information of the second cell. By having the terminal device determine whether the second cell meets the requirements, the impact of the embodiment of the present application on the base station and core network elements can be minimized.

[0096] In the preceding description, the second cell is determined by the terminal device. In some scenarios, the second cell may also be determined by the first network element (such as a mobility management network element). For example, when the terminal device is located in the first cell, the first network element may determine the third information based on the second information. The third information is used to indicate or determine the second cell that the terminal device is allowed to access.

[0097] In some embodiments, when the terminal device is located in the first cell, the terminal device may send fifth information to the source base station. If the first cell is a CAG cell, the fifth information may be used to indicate CSG information supported by neighboring base stations of the source base station; and / or if the first cell is a CSG cell, the fifth information may be used to indicate CAG information supported by neighboring base stations of the source base station.

[0098] In some embodiments, the fifth information may be sent to the first network element via the source base station.

[0099] In some embodiments, the first network element determining the third information according to the second information may include: the first network element determining the third information according to the second information and the fifth information.

[0100] In some embodiments, the first network element sends third information to the source base station.

[0101] In some embodiments, the third information may be used to indicate the first identifier associated with the second cell.

[0102] The embodiment of the present application does not specifically limit the first identifier. The first identifier can be a CSG ID or a CAG ID. For example, if the second cell is a CSG cell, then the first identifier is the CSG ID; or if the second cell is a CAG cell, then the first identifier is the CAG ID.

[0103] In some embodiments, associating the second cell with the first identifier may include: a CSG ID or a CAG ID has a corresponding relationship with the cell ID.

[0104] In some embodiments, the source base station determines the cell identifier of the second cell based on the first identifier; then, the source base station determines the target base station based on the cell identifier of the second cell; and finally, the source base station sends a handover request to the target base station. The handover request is used to handover the terminal device to the second cell.

[0105] In this embodiment of the present application, the first network element confirms the second cell that is allowed to be accessed and sends the identification information of the second cell to the source base station to determine the target base station. Based on the relevant technology, this embodiment of the present application adds interaction between the first network element and the source base station, thereby enabling the terminal device to switch between the CAG cell and the CSG cell. Although this embodiment of the present application will have an impact on the first network element, the impact on the terminal device is relatively small.

[0106] The following takes the first network element as AMF, the second network element as UDM, and the terminal device as UE as an example, and combines Figure 3 to illustrate the embodiment of the present application in detail.

[0107] Figure 3 is a flow chart of a method for obtaining a list of CAGs and CSGs allowed to access provided by an embodiment of the present application. The method shown in Figure 3 may include steps S310 to S360.

[0108] In step S310, the UE sends a registration request message to the AMF. The registration request message carries first information. The first information is used to indicate that the terminal device has the ability to access CAG cells and CSG cells. The first information can be carried in the 5G MM capability parameter in the registration information.

[0109] In step S320, the AMF requests the UDM for the UE's subscription information. The request may carry the UE ID.

[0110] The AMF may carry the UE ID in the request, thereby obtaining the UE's subscription information through the UE ID. The subscription information may include, for example, one or more of the following: CAG information and / or CSG information allowed for use by the terminal device, and information indicating whether the terminal device is only allowed to access the communication network through CAG and / or CSG.

[0111] In step S330, the UDM returns the UE's subscription information to the AMF. For example, the UDM may send one or more of the following information to the AMF: UE ID, and the UE's subscription information related to CAG and CSG access.

[0112] In step S340, the AMF determines second information based on the UE's subscription information and the first information, and stores the second information. The second information may be used to indicate the set of CAGs and / or CSGs that the terminal device is allowed to access. The set of CAGs and / or CSGs may be, for example, a list of CAGs and CSGs. The set of CAGs and / or CSGs may include one or more CAG IDs and / or one or more CSG IDs. For example, the AMF may determine and store the list of CAGs and CSGs of the UE based on the capabilities of the UE's CAG cells and CSG cells and the UE subscription information obtained from the UDM.

[0113] In step S350, the AMF sends a next generation access protocol (NGAP) message to the (R)AN. The NGAP message may carry the second information determined in step S340. This step is optional.

[0114] In step S360, the AMF sends a registration accept message to the UE. The registration accept message may carry the second information determined in step S340.

[0115] In this example, the terminal device can obtain the CAG and CSG lists allowed to be accessed through the received second information, thereby facilitating switching between CAG cells and CSG cells.

[0116] The following takes the first network element as AMF, the second network element as UDM, the third network element as MME, the source base station as gNB, the target base station as target eNB, and the terminal device as UE as an example, and combines Figure 4 to illustrate the embodiment of the present application in detail.

[0117] Figure 4 is a flow chart of a method for determining a target base station according to an embodiment of the present application. The method shown in Figure 4 may include steps S410 to S490.

[0118] Referring to Figure 4, in step S410, the UE receives a system message sent by a base station. The system message includes fourth information. The fourth information may include CAG information and / or CSG information supported by neighboring base stations. For example, the fourth information may include CSG information supported by neighboring base stations of the source base station.

[0119] In step S420, the UE determines the third information based on the second information. The second information is used to indicate the set of CAGs and / or CSGs that the terminal device is allowed to access. The set of CAGs and / or CSGs can be, for example, a list of CAGs and CSGs. The set of CAGs and / or CSGs can include one or more CAG IDs and / or one or more CSG IDs. The third information is used to determine the CSG cells that the terminal device is allowed to access. The third information can be used to indicate the correspondence between the CAG ID and the cell ID. After receiving the list of CAGs and CSGs, the UE can determine whether it can access the CSG cell based on the list of CAGs and CSGs.

[0120] In step S430, the UE sends third information to the source gNB. The third information may be information about the CSG cells that the UE has determined can be accessed. The third information may include one or more CSG IDs.

[0121] In step S440, the source gNB sends a handover request to the AMF. For example, the source gNB may determine the cell ID based on the CSG ID. Next, the source gNB may determine the target eNB based on the cell ID. Finally, the source gNB may send a handover request to the AMF. This handover request is used to handover the UE to a CSG cell under the target eNB, and the handover request may indicate the target eNB, such as by carrying the target eNB ID.

[0122] In step S450, the AMF sends a different system redirection request to the MME. For example, the AMF may determine the MME based on the target eNB ID and send the different system redirection request to the MME.

[0123] In step S460, the MME exchanges handover request / response with the target eNB. For example, the MME sends a handover request to the target eNB, and the target eNB returns a response message agreeing to the handover.

[0124] In step S470, the MME sends a different system redirection response to the AMF.

[0125] In step S480, the AMF sends a handover command to the UE through the source eNB.

[0126] In step S490, the UE notifies the MME of the handover completion through the target eNB.

[0127] In the method shown in Figure 4, when a UE needs to perform a CAG-to-CSG handover, it receives system messages to learn about its surrounding CSG cells. The UE then determines which CSG cells are allowed access based on the CAG and CSG lists. The UE then reports the CSG IDs corresponding to the allowed CSG cells to the source gNB. The source gNB determines the corresponding target eNB based on the cell IDs and initiates a handover request to the AMF. In this example, the UE determines eligible target CSGs and sends them to the source eNB, minimizing the impact of this embodiment on base stations and core network elements.

[0128] The following takes the first network element as AMF, the second network element as UDM, the third network element as MME, the source base station as source gNB, the target base station as target eNB, and the terminal device as UE as an example, and combines Figure 5 to illustrate the embodiment of the present application in detail.

[0129] Figure 5 is a schematic diagram of another method for determining a target base station provided by an embodiment of the present application. The method shown in Figure 5 may include steps S510a to S590.

[0130] In step S510a, the UE receives a system message sent by the base station. The system message includes fourth information. The fourth information may include CAG information and / or CSG information supported by neighboring base stations. For example, the fourth information may include CSG information (which may include one or more CSG IDs) supported by neighboring base stations of the source base station.

[0131] In step S510b, the UE sends fifth information to the source eNB. The fifth information is used to indicate CSG information supported by neighboring base stations of the source gNB.

[0132] In step S520, the source gNB sends the fifth information to the AMF. Before sending the fifth information to the AMF, the source gNB may store the correspondence between the CSG ID and the cell ID. The source gNB may send multiple CSG IDs and their corresponding cell IDs to the AMF.

[0133] In step S530, the AMF determines the third information based on the second information. The second information is used to indicate the set of CAGs and / or CSGs that the terminal device is allowed to access. The set of CAGs and / or CSGs can be, for example, a list of CAGs and CSGs. The set of CAGs and / or CSGs can include one or more CAG IDs and / or one or more CSG IDs. The third information is used to determine the CSG cells that the terminal device is allowed to access. The third information can be used to indicate the correspondence between the CAG ID and the cell ID. For example, the AMF can determine whether the UE can access the CSG cell based on the list of CAGs and CSGs.

[0134] In step S540, the AMF sends third information to the source gNB.

[0135] In step S550, the source gNB sends a Handover Request (Target eNB) to the AMF. For example, the source gNB may determine the cell ID based on the CSG ID. Next, the source gNB may determine the target eNB based on the cell ID. Finally, the source gNB may send the Handover Request to the AMF. This Handover Request is used to handover the UE to a CSG cell under the target eNB, and the Handover Request may indicate the target eNB, such as by carrying the target eNB ID.

[0136] Steps S560a to S590 are the same as steps S460 to S490 in FIG. 4 , and are not described again here.

[0137] In the method shown in Figure 5, when a UE needs to perform a CAG-to-CSG handover, the UE receives system messages to learn about its surrounding CSG cells. The UE reports the cell IDs and CSG IDs of the surrounding CSG cells that meet certain requirements (e.g., good signal quality) to the source gNB. The source gNB then sends the cell IDs and CSG IDs to the AMF. The AMF determines which CSG IDs meet the requirements based on the list of allowed CAGs and CSGs. The AMF interacts with the source gNB to obtain the target eNB ID. In the example of Figure 5, the AMF is enhanced to enable it to determine the CSG IDs that the UE is allowed to access. Furthermore, the example of Figure 5 includes additional interaction between the AMF and the source gNB, enabling support for UE handover between CAG and CSG. This example has minimal impact on the UE, thereby simplifying UE implementation complexity.

[0138] The above describes the method embodiment of the present application in detail, and the following describes the device embodiment of the present application in detail. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment, so for parts not described in detail, reference can be made to the previous method embodiment.

[0139] FIG6 is a schematic structural diagram of a terminal device provided in an embodiment of the present application. The terminal device 600 may include a first sending unit 610 .

[0140] The first sending unit 610 is used to send first information to a first network element of the core network, where the first information is used to indicate that the terminal device has the ability to access a CAG cell and a CSG cell.

[0141] In some embodiments, the terminal device 610 further includes: a first receiving unit, configured to receive second information sent by the first network element, wherein the second information is configured to indicate a set of CAGs and / or CSGs that the terminal device is allowed to access.

[0142] In some embodiments, the terminal device 610 also includes: a determination unit for determining third information based on the second information, and the third information is used to determine a second cell that the terminal device is allowed to access; wherein, the first cell is a CAG cell and the second cell is a CSG cell; or, the first cell is a CSG cell and the second cell is a CAG cell.

[0143] In some embodiments, the terminal device 610 further includes: a second sending unit, configured to send the third information to the source base station.

[0144] In some embodiments, the third information is used to indicate a CSG identifier or a CAG identifier associated with the second cell.

[0145] In some embodiments, the determination unit is also used to: determine the third information based on the second information and the fourth information; wherein, the second cell is a CSG cell, and the fourth information is the CSG information supported by the neighboring base station of the source base station; or, the second cell is a CAG cell, and the fourth information is the CAG information supported by the neighboring base station of the source base station.

[0146] In some embodiments, the terminal device 610 further includes: a second receiving unit, configured to receive a switching command sent by a source base station, wherein the switching command is configured to instruct the terminal device to switch from the first cell to the second cell.

[0147] In some embodiments, the terminal device 610 also includes: a third sending unit, used to send fifth information to the source base station when the terminal device is located in the first cell; wherein, the first cell is a CAG cell, and the fifth information is used to indicate the CSG information supported by the neighboring base station of the source base station; or, the first cell is a CSG cell, and the fifth information is used to indicate the CAG information supported by the neighboring base station of the source base station.

[0148] In some embodiments, the terminal device 610 also includes: a third receiving unit, used to receive a switching command sent by the source base station, and the switching command is used to instruct the terminal device to switch from the first cell to the second cell; wherein, the first cell is a CAG cell and the second cell is a CSG cell; or, the first cell is a CSG cell and the second cell is a CAG cell.

[0149] In some embodiments, the first network element is a mobility management network element.

[0150] FIG7 is a schematic structural diagram of a core network element provided in an embodiment of the present application. The core network element 700 may be a first network element. The core network element 700 may include a first receiving unit 710.

[0151] The first receiving unit 710 is used to receive first information sent by a terminal device, where the first information is used to indicate that the terminal device has the ability to access a CAG cell and a CSG cell.

[0152] In some embodiments, the core network element 700 further includes: a first sending unit, configured to send second information to the terminal device, wherein the second information is configured to indicate a set of CAGs and / or CSGs that the terminal device is allowed to access.

[0153] In some embodiments, the core network element 700 also includes: a second receiving unit, used to receive the contract information of the terminal device, the contract information including one or more of the following: CAG information and / or CSG information allowed to be used by the terminal device; information indicating whether the terminal device is only allowed to access the communication network through CAG and / or CSG.

[0154] In some embodiments, the core network element 700 further includes: a first determination unit, used to determine second information based on the subscription information and the first information, wherein the second information is used to indicate a set of CAGs and / or CSGs that the terminal device is allowed to access.

[0155] In some embodiments, the core network element 700 further includes: a second sending unit, configured to send the second information to the base station, wherein the second information is used to indicate a set of CAGs and / or CSGs that the terminal device is allowed to access.

[0156] In some embodiments, the core network element 700 also includes: a second determination unit, used to determine third information based on second information when the terminal device is located in the first cell, the second information is used to indicate the set of CAG and / or CSG that the terminal device is allowed to access, and the third information is used to determine the second cell that the terminal device is allowed to access; wherein, the first cell is a CAG cell and the second cell is a CSG cell; or, the first cell is a CSG cell and the second cell is a CAG cell.

[0157] In some embodiments, the second determination unit is further used to: determine the third information based on the second information and the fifth information; wherein, the second cell is a CSG cell, and the fifth information is used to indicate the CSG information supported by the neighboring base station of the source base station; or, the second cell is a CAG cell, and the fifth information is used to indicate the CAG information supported by the neighboring base station of the source base station.

[0158] In some embodiments, the core network element 700 further includes: a third sending unit, configured to send the third information to the source base station.

[0159] In some embodiments, the first network element is a mobility management network element.

[0160] FIG8 is a schematic structural diagram of a base station provided in an embodiment of the present application. The base station 800 may include a first receiving unit 810.

[0161] The first receiving unit 810 is used to receive third information, where the third information is sent by a terminal device or a first network element in the first cell, and the third information is used to determine a second cell that the terminal device is allowed to access; wherein the first cell is a CAG cell and the second cell is a CSG cell; or, the first cell is a CSG cell and the second cell is a CAG cell.

[0162] In some embodiments, the third information is used to indicate the first identifier associated with the second cell; wherein, the second cell is a CSG cell, and the first identifier is a CSG identifier; or, the second cell is a CAG cell, and the first identifier is a CAG identifier.

[0163] In some embodiments, the base station 800 also includes: a first determination unit, used to determine the cell identifier of the second cell based on the first identifier; a second determination unit, used to determine the target base station based on the cell identifier of the second cell; and a first sending unit, used to send a switching request to the target base station, wherein the switching request is used to switch the terminal device to the second cell.

[0164] In some embodiments, the first network element is a mobility management network element.

[0165] Figure 9 is a schematic block diagram of a communication device according to an embodiment of the present application. Dashed lines in Figure 9 indicate that the unit or module is optional. Device 900 may be used to implement the method described in the above method embodiment. Device 900 may be a chip, a terminal device, or a core network device.

[0166] The device 900 may include one or more processors 910. The processor 910 may support the device 900 to implement the method described in the method embodiment above. The processor 910 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0167] The apparatus 900 may further include one or more memories 920. The memories 920 store programs that can be executed by the processor 910, causing the processor 910 to perform the methods described in the above method embodiments. The memories 920 may be independent of the processor 910 or integrated into the processor 910.

[0168] The apparatus 900 may further include a transceiver 930. The processor 910 may communicate with other devices or chips via the transceiver 930. For example, the processor 910 may transmit and receive data with other devices or chips via the transceiver 930.

[0169] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to the core network element and / or terminal device provided in the embodiments of the present application, and the program causes a computer to execute the methods performed by the core network element, terminal device, and base station in various embodiments of the present application.

[0170] The present application also provides a computer program product. This computer program product includes a program. This computer program product can be applied to the core network elements, terminal devices, and base stations provided in the present application. The program causes a computer to execute the methods performed by the core network elements and / or terminal devices in various embodiments of the present application.

[0171] The present application also provides a computer program that can be applied to the core network element, terminal device, and base station provided in the present application, and enables a computer to execute the methods performed by the core network element, terminal device, and base station in the various embodiments of the present application.

[0172] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0173] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0174] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0175] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0176] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0177] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0178] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0179] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0180] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0181] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0182] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0183] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0184] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: The terminal device sends first information to the first network element of the core network, where the first information is used to indicate that the terminal device has the ability to access a closed access group CAG cell and a closed subscriber group CSG cell.

2. The method according to claim 1, characterized in that The method further comprises: The terminal device receives second information sent by the first network element, where the second information is used to indicate a set of CAGs and / or CSGs that the terminal device is allowed to access.

3. The method according to claim 2, characterized in that The method further comprises: When the terminal device is located in the first cell, the terminal device determines third information according to the second information, where the third information is used to determine a second cell that the terminal device is allowed to access; The first cell is a CAG cell, and the second cell is a CSG cell; or The first cell is a CSG cell, and the second cell is a CAG cell.

4. The method according to claim 3, characterized in that The method further comprises: The terminal device sends the third information to the source base station.

5. The method according to claim 3 or 4, characterized in that The third information is used to indicate the CSG identifier or CAG identifier associated with the second cell.

6. The method according to any one of claims 3 to 5, characterized in that The terminal device determines third information according to the second information, including: The terminal device determines the third information according to the second information and the fourth information; The second cell is a CSG cell, and the fourth information is CSG information supported by a neighboring base station of the source base station; or The second cell is a CAG cell, and the fourth information is CAG information supported by a neighboring base station of the source base station.

7. The method according to any one of claims 3 to 6, characterized in that The method further comprises: The terminal device receives a switching command sent by a source base station, where the switching command is used to instruct the terminal device to switch from the first cell to the second cell.

8. The method according to claim 1 or 2, characterized in that The method further comprises: When the terminal device is located in the first cell, the terminal device sends fifth information to the source base station; The first cell is a CAG cell, and the fifth information is used to indicate CSG information supported by a neighboring base station of the source base station; or The first cell is a CSG cell, and the fifth information is used to indicate CAG information supported by neighboring base stations of the source base station.

9. The method according to claim 8, characterized in that The method further comprises: The terminal device receives a handover command sent by the source base station, where the handover command is used to instruct the terminal device to handover from the first cell to the second cell; The first cell is a CAG cell, and the second cell is a CSG cell; or The first cell is a CSG cell, and the second cell is a CAG cell.

10. The method according to any one of claims 1 to 9, characterized in that The first network element is a mobility management network element.

11. A wireless communication method, characterized in that: include: The first network element of the core network receives first information sent by the terminal device, where the first information is used to indicate that the terminal device has the ability to access a closed access group CAG cell and a closed subscriber group CSG cell.

12. The method according to claim 11, characterized in that The method further comprises: The first network element sends second information to the terminal device, where the second information is used to indicate a set of CAGs and / or CSGs that the terminal device is allowed to access.

13. The method according to claim 11 or 12, characterized in that The method further comprises: The first network element receives the subscription information of the terminal device, where the subscription information includes one or more of the following: CAG information and / or CSG information allowed to be used by the terminal device; Information indicating whether the terminal device is only allowed to access the communication network through CAG and / or CSG.

14. The method according to claim 13, wherein: The method further comprises: The first network element determines second information based on the subscription information and the first information, where the second information is used to indicate a set of CAGs and / or CSGs that the terminal device is allowed to access.

15. The method according to any one of claims 11 to 14, characterized in that The method further comprises: The first network element sends the second information to the base station, where the second information is used to indicate the set of CAGs and / or CSGs that the terminal device is allowed to access.

16. The method according to any one of claims 11 to 15, characterized in that The method further comprises: When the terminal device is located in the first cell, the first network element determines third information according to the second information, where the second information is used to indicate a set of CAGs and / or CSGs that the terminal device is allowed to access, and the third information is used to determine a second cell that the terminal device is allowed to access; The first cell is a CAG cell, and the second cell is a CSG cell; or The first cell is a CSG cell, and the second cell is a CAG cell.

17. The method according to claim 16, characterized in that The first network element determines the third information according to the second information, including: The first network element determines the third information according to the second information and the fifth information; The second cell is a CSG cell, and the fifth information is used to indicate CSG information supported by a neighboring base station of the source base station; or The second cell is a CAG cell, and the fifth information is used to indicate CAG information supported by neighboring base stations of the source base station.

18. The method according to claim 16 or 17, characterized in that The method further comprises: The first network element sends the third information to the source base station.

19. The method according to any one of claims 11 to 18, characterized in that The first network element is a mobility management network element.

20. A wireless communication method, characterized in that: include: The source base station receives third information, where the third information is sent by a terminal device or a first network element in the first cell, and the third information is used to determine a second cell that the terminal device is allowed to access; The first cell is a closed access group (CAG) cell, and the second cell is a closed subscriber group (CSG) cell; or The first cell is a CSG cell, and the second cell is a CAG cell.

21. The method according to claim 20, characterized in that The third information is used to indicate the first identifier associated with the second cell; The second cell is a CSG cell, and the first identifier is a CSG identifier; or The second cell is a CAG cell, and the first identifier is a CAG identifier.

22. The method according to claim 21, characterized in that The method further comprises: Determining, by the source base station, the cell identifier of the second cell according to the first identifier; The source base station determines the target base station according to the cell identifier of the second cell; The source base station sends a switching request to the target base station, where the switching request is used to switch the terminal device to the second cell.

23. The method according to any one of claims 20 to 22, characterized in that The first network element is a mobility management network element.

24. A terminal device, characterized in that: include: The first sending unit is used to send first information to a first network element of the core network, where the first information is used to indicate that the terminal device has the ability to access a closed access group CAG cell and a closed subscriber group CSG cell.

25. The terminal device according to claim 24, characterized in that The terminal device further includes: The first receiving unit is used to receive second information sent by the first network element, where the second information is used to indicate the set of CAGs and / or CSGs that the terminal device is allowed to access.

26. The terminal device according to claim 25, characterized in that The terminal device further includes: a determining unit, configured to determine, when the terminal device is located in the first cell, third information based on the second information, the third information being used to determine a second cell that the terminal device is allowed to access; The first cell is a CAG cell, and the second cell is a CSG cell; or The first cell is a CSG cell, and the second cell is a CAG cell.

27. The terminal device according to claim 26, characterized in that The terminal device further includes: The second sending unit is configured to send the third information to the source base station.

28. The terminal device according to claim 26 or 27, characterized in that: The third information is used to indicate the CSG identifier or CAG identifier associated with the second cell.

29. The terminal device according to any one of claims 26 to 28, characterized in that: The determining unit is further configured to: determining the third information according to the second information and the fourth information; The second cell is a CSG cell, and the fourth information is CSG information supported by a neighboring base station of the source base station; or The second cell is a CAG cell, and the fourth information is CAG information supported by a neighboring base station of the source base station.

30. The terminal device according to any one of claims 26 to 29, characterized in that: The terminal device further includes: The second receiving unit is used to receive a switching command sent by a source base station, where the switching command is used to instruct the terminal device to switch from the first cell to the second cell.

31. The terminal device according to claim 24 or 25, characterized in that: The terminal device further includes: A third sending unit, configured to send fifth information to the source base station when the terminal device is located in the first cell; The first cell is a CAG cell, and the fifth information is used to indicate the CSG information supported by the neighboring base station of the source base station. interest; or, The first cell is a CSG cell, and the fifth information is used to indicate CAG information supported by neighboring base stations of the source base station.

32. The terminal device according to claim 31, characterized in that The terminal device further includes: A third receiving unit is configured to receive a handover command sent by the source base station, where the handover command is used to instruct the terminal device to switch from the first cell to the second cell; The first cell is a CAG cell, and the second cell is a CSG cell; or The first cell is a CSG cell, and the second cell is a CAG cell.

33. The terminal device according to any one of claims 24 to 32, characterized in that: The first network element is a mobility management network element.

34. A core network element, characterized in that: The core network element is a first network element, including: The first receiving unit is used to receive first information sent by a terminal device, where the first information is used to indicate that the terminal device has the ability to access a closed access group CAG cell and a closed subscriber group CSG cell.

35. The core network element according to claim 34, characterized in that: The core network element also includes: The first sending unit is used to send second information to the terminal device, where the second information is used to indicate the set of CAGs and / or CSGs that the terminal device is allowed to access.

36. The core network element according to claim 34 or 35, characterized in that: The core network element also includes: The second receiving unit is configured to receive contract information of the terminal device, where the contract information includes one or more of the following: CAG information and / or CSG information allowed to be used by the terminal device; Information indicating whether the terminal device is only allowed to access the communication network through CAG and / or CSG.

37. The core network element according to claim 36, characterized in that: The core network element further includes: The first determination unit is used to determine second information based on the subscription information and the first information, where the second information is used to indicate a set of CAGs and / or CSGs that the terminal device is allowed to access.

38. The core network element according to any one of claims 34 to 37, characterized in that: The core network element further includes: The second sending unit is used to send the second information to the base station, where the second information is used to indicate the set of CAGs and / or CSGs that the terminal device is allowed to access.

39. The core network element according to any one of claims 34 to 38, characterized in that: When the terminal device is located in the first cell, the core network element further includes: a second determining unit, configured to determine third information based on the second information, where the second information is used to indicate a set of CAGs and / or CSGs that the terminal device is allowed to access, and the third information is used to determine a second cell that the terminal device is allowed to access; The first cell is a CAG cell, and the second cell is a CSG cell; or The first cell is a CSG cell, and the second cell is a CAG cell.

40. The core network element according to claim 39, characterized in that: The second determining unit is further configured to: determining the third information according to the second information and the fifth information; The second cell is a CSG cell, and the fifth information is used to indicate CSG information supported by a neighboring base station of the source base station; or The second cell is a CAG cell, and the fifth information is used to indicate CAG information supported by neighboring base stations of the source base station.

41. The core network element according to claim 39 or 40, characterized in that: The core network element further includes: The third sending unit is configured to send the third information to the source base station.

42. The core network element according to any one of claims 34 to 41, characterized in that: The first network element is a mobility management network element.

43. A base station, characterized in that The base station is a source base station of the terminal device, and the base station includes: A first receiving unit is configured to receive third information, where the third information is sent by a terminal device or a first network element in the first cell, and the third information is used to determine a second cell that the terminal device is allowed to access; The first cell is a closed access group (CAG) cell, and the second cell is a closed subscriber group (CSG) cell; or The first cell is a CSG cell, and the second cell is a CAG cell.

44. The base station according to claim 43, characterized in that The third information is used to indicate the first identifier associated with the second cell; The second cell is a CSG cell, and the first identifier is a CSG identifier; or The second cell is a CAG cell, and the first identifier is a CAG identifier.

45. The base station according to claim 44, characterized in that The base station further includes: a first determining unit, configured to determine a cell identifier of the second cell according to the first identifier; a second determining unit, configured to determine a target base station according to a cell identifier of the second cell; The first sending unit is used to send a switching request to the target base station, where the switching request is used to switch the terminal device to the second cell.

46. The base station according to any one of claims 43 to 45, characterized in that The first network element is a mobility management network element.

47. A terminal device, characterized in that: The system comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory to execute the method according to any one of claims 1 to 10.

48. A core network element, characterized in that: The system comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory to execute the method according to any one of claims 11 to 19.

49. A base station, characterized in that The system comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory to execute the method according to any one of claims 20 to 23.

50. A chip, characterized in that: The device comprises a processor configured to call a program from a memory so that a device equipped with the chip executes a method according to any one of claims 1 to 10, any one of claims 11 to 19, or any one of claims 20 to 23.

51. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 10, any one of claims 11 to 19, or any one of claims 20 to 23.

52. A computer program product, characterized in that The method comprises a program for causing a computer to execute the method according to any one of claims 1 to 10, any one of claims 11 to 19 or any one of claims 20 to 23.

53. A computer program, characterized in that The computer program causes a computer to execute the method of any one of claims 1-10, any one of claims 11-19, or any one of claims 20-23.

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