Cell determination method, cell determination apparatus, communication device, chip, storage medium, and product

Abstract

Embodiments of the present application provide a cell determination method, a cell determination apparatus, a communication device, a chip, a storage medium, and a product. The method comprises: on the basis of a first mapping relationship, a terminal device determining a second cell having a mapping relationship with a first cell, wherein the first mapping relationship is a mapping relationship between a closed access group (CAG) cell and a closed subscription group (CSG) cell, the first cell is one among the CAG cell and the CSG cell, and the second cell is the other among the CAG cell and the CSG cell.

Description

Cell determination method, cell determination device, communication equipment, chip, storage medium and product Technical Field

[0001] The embodiments of the present application relate to the field of mobile communication technology, and specifically to a cell determination method, a cell determination apparatus, a communication device, a chip, a storage medium, and a product. Background Art

[0002] Public network integrated non-public network (PNI-NPN) means that terminal devices access non-public networks through public networks, such as public land mobile networks (PLMN). At present, in order to prevent terminal devices that do not have access rights to non-public networks from accessing non-public networks through public networks, closed access group (CAG) technology or closed subscription group (CSG) technology has been introduced. Terminal devices can access 5G public networks through CAG, or can access 4G public networks through CSG, thereby achieving the purpose of accessing non-public networks. However, CAG and CSG are independent characteristics. When terminal devices move between CAG and CSG, the interoperability between 5G public networks and 4G public networks cannot be supported, which can easily lead to business interruption problems.

[0003] Summary of the Invention

[0004] The present application provides a cell determination method, a cell determination device, a communication device, a chip, a storage medium and a product, which can enable a terminal device to successfully select an allowed CAG or CSG, ensure the success of subsequent processes, and ensure business continuity.

[0005] In a first aspect, a cell determination method is provided, including:

[0006] The terminal device determines a second cell having a mapping relationship with the first cell based on the first mapping relationship; wherein the first mapping relationship is a mapping relationship between a closed access group CAG cell and a closed subscription group CSG cell; the first cell is one of the CAG cell and the CSG cell, and the second cell is the other of the CAG cell and the CSG cell.

[0007] In a second aspect, a cell determination method is provided, including:

[0008] The network device sends a registration acceptance message or a configuration update command message to the terminal device; wherein the registration acceptance message or the configuration update command message includes a first mapping relationship, the first mapping relationship is a mapping relationship between a closed access group CAG cell and a closed subscription group CSG cell, and the first mapping relationship is used by the terminal device to determine a second cell corresponding to the first cell, the first cell is one of the CAG cell and the CSG cell, and the second cell is the other of the CAG cell and the CSG cell.

[0009] In a third aspect, a cell determination device is provided, applied to a terminal device, including:

[0010] The first determination unit is configured to determine a second cell having a mapping relationship with the first cell based on the first mapping relationship; wherein the first mapping relationship is a mapping relationship between a closed access group CAG cell and a closed subscription group CSG cell; the first cell is one of the CAG cell and the CSG cell, and the second cell is the other of the CAG cell and the CSG cell.

[0011] In a fourth aspect, a cell determination device is provided, which is applied to a network device, including:

[0012] The first sending unit is configured to send a registration acceptance message or a configuration update command message; wherein the registration acceptance message or the configuration update command message is used to indicate a first mapping relationship, the first mapping relationship is a mapping relationship between a closed access group CAG cell and a closed subscription group CSG cell, the first mapping relationship is used by the terminal device to determine a second cell corresponding to the first cell, the first cell is one of the CAG cell and the CSG cell, and the second cell is the other of the CAG cell and the CSG cell.

[0013] In a fifth aspect, a communication device is provided, comprising a processor and a memory. The memory is configured to store a computer program, and the processor is connected to the memory and configured to call and execute the computer program from the memory to implement the cell determination method described in any one of the first to second aspects.

[0014] In a sixth aspect, a chip is provided, comprising: a processor; the processor is used to call and run a computer program from a memory, so that a device equipped with the chip executes the cell determination method described in any one of the first to second aspects above.

[0015] In a seventh aspect, a computer-readable storage medium is provided for storing a computer program, wherein when the computer program is executed by a processor, the cell determination method described in any one of the first to second aspects is implemented.

[0016] In an eighth aspect, a computer program product is provided, comprising computer program instructions, which are executed by a processor to implement the cell determination method described in any one of the first to second aspects above.

[0017] Through the above technical solution, the terminal device is aware of the first mapping relationship between the CAG cell and the CSG cell in advance. After the terminal device moves from the CAG cell (or CSG cell) to the CSG cell (or CAG cell) that has a mapping relationship with the CAG cell (or CSG cell), the terminal device can access the allowed CSG cell (or CAG cell), thereby ensuring that the terminal device can successfully select the allowed CAG cell or CSG cell and ensure service continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] FIG1 is a schematic diagram of a communication architecture according to an embodiment of the present application;

[0020] FIG2 is a schematic diagram of a network architecture of an optional 5G communication system according to an embodiment of the present application;

[0021] FIG3 is a schematic diagram of a network architecture for an optional integrated deployment of 4G and 5G communication systems according to an embodiment of the present application;

[0022] FIG4 is a schematic flow chart of an optional cell determination method according to an embodiment of the present application;

[0023] FIG5 is a schematic flow chart of an optional cell determination method according to an embodiment of the present application;

[0024] FIG6 is a schematic flow chart of an optional cell determination method according to an embodiment of the present application;

[0025] FIG7 is a schematic flow chart of an optional cell determination method according to an embodiment of the present application;

[0026] FIG8 is a schematic flow chart of an optional cell determination method according to an embodiment of the present application;

[0027] FIG9 is a schematic structural diagram of an optional cell determination device provided in an embodiment of the present application;

[0028] FIG10 is a schematic structural diagram of an optional cell determination device provided in an embodiment of the present application;

[0029] FIG11 is a schematic structural diagram of an optional communication device provided in an embodiment of the present application;

[0030] FIG12 is a schematic structural diagram of an optional chip provided in an embodiment of the present application;

[0031] FIG13 is a schematic block diagram of an optional communication system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] Figure 1 is a schematic diagram of a communication architecture according to an embodiment of the present application. As shown in Figure 1, a communication system 100 may include a terminal device 110 and a network device 120. The network device 120 may communicate with the terminal device 110 via an air interface. The terminal device 110 and the network device 120 support multi-service transmission.

[0034] It should be understood that the embodiments of the present application are only illustrative of the communication system 100, but the embodiments of the present application are not limited thereto. That is, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Internet of Things (IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine-Type Communications (eMTC) system, 5G communication system (also known as New Radio (NR) communication system), or future communication systems.

[0035] In the communication system 100 shown in Figure 1, the network device 120 may be an access network device that communicates with the terminal device 110. The access network device may provide communication coverage for a specific geographical area and may communicate with the terminal device 110 (eg, UE) located within the coverage area.

[0036] The network device 120 may be an evolved Node B (eNB or eNodeB) in a Long Term Evolution (LTE) system, or a Next Generation Radio Access Network (NG RAN) device, or a base station (gNB) in an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the network device 120 may be a relay station, an access point, an in-vehicle device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved Public Land Mobile Network (PLMN), etc.

[0037] The terminal device 110 may be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wireless connection.

[0038] For example, the terminal device 110 may refer to an access terminal, user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user apparatus. An access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handheld terminal, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolution network, etc.

[0039] The wireless communication system 100 may further include a core network device 130 that communicates with the network device 120. The core network device 130 may be a 5G core network (5G Core, 5GC) device, such as an Access and Mobility Management Function (AMF), an Authentication Server Function (AUSF), a User Plane Function (UPF), or a Session Management Function (SMF). Optionally, the core network device 130 may also be an Evolved Packet Core (EPC) device of an LTE network, such as a Session Management Function + Core Packet Gateway (SMF+PGW-C) device. It should be understood that SMF+PGW-C can simultaneously implement the functions that can be implemented by SMF and PGW-C. During the network evolution process, the above-mentioned core network device may also be called other names, or a new network entity may be formed by dividing the functions of the core network, which is not limited in the embodiments of the present application.

[0040] The functional units in the communication system 100 may also establish connections and implement communication via next generation (NG) network interfaces.

[0041] For example, the terminal device establishes an air interface connection with the access network device through the Uu interface for transmitting user plane data and control plane signaling; the terminal device can establish a control plane signaling connection with the AMF through the NG interface 1 (referred to as N1); the access network device, such as the next generation wireless access base station (gNB), can establish a user plane data connection with the UPF through the NG interface 3 (referred to as N3); the access network device can establish a control plane signaling connection with the AMF through the NG interface 2 (referred to as N2); the UPF can establish a control plane signaling connection with the SMF through the NG interface 4 (referred to as N4); the UPF can exchange user plane data with the data network through the NG interface 6 (referred to as N6); the AMF can establish a control plane signaling connection with the SMF through the NG interface 11 (referred to as N11); the SMF can establish a control plane signaling connection with the PCF through the NG interface 7 (referred to as N7).

[0042] Figure 1 exemplarily shows a base station, a core network device and two terminal devices. Optionally, the wireless communication system 100 may include multiple base stations and each base station may include other numbers of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0043] It should be noted that Figure 1 is merely an example of a system applicable to this application. Of course, the methods described in the embodiments of this application can also be applied to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and / or" herein simply describes an association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the associated objects are in an "or" relationship. It should also be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, "A indicates B" can mean that A directly indicates B, for example, B can obtain information through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can obtain information through C; or it can mean that A and B have an association relationship. It should also be understood that the "correspondence" mentioned in the embodiments of this application can mean that there is a direct or indirect correspondence between two objects, or that there is an association relationship between the two objects, or a relationship between an indicator and the indicated, a configuration and the configured, and so on. It should also be understood that the “predefined” or “predefined rules” mentioned in the embodiments of the present application can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices), and the present application does not limit its specific implementation method. For example, predefined can refer to what is defined in the protocol. It should also be understood that in the embodiments of the present application, the “protocol” may refer to a standard protocol in the field of communications, such as LTE protocols, NR protocols, and related protocols used in future communication systems, and the present application does not limit this.

[0044] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0045] The network architecture of the 5G communication system is shown in Figure 2, including: AMF, SMF, policy control function, authentication server function (AUSF), unified data management (UDM), UPF, network slice selection function (NSSF) and application layer function (AF).

[0046] Furthermore, the network architecture also includes access network equipment ((Radio)Access Network, (R)AN), UE and data network element (data network, DN). UE can be connected to AMF, (R)AN can also be connected to AMF, (R)AN can also be connected to UPF, UPF can be connected to SMF and DN respectively, AMF can be connected to SMF, UDM, PCF, NSSF and AUSF respectively, SMF is connected to PCF and UDM respectively. PCF is connected to AF. Both AMF and SMF can obtain data from UDM, such as user subscription data, and both AMF and SMF can obtain policy data from PCF. For example, the PCF element obtains user subscription data from UDM and sends it to AMF and SMF, and then AMF and SMF send it to (R)AN, UE and UPF, etc.

[0047] AMF is mainly used for the registration, mobility management, and tracking area update processes of terminal devices in mobile networks. The mobility management network element terminates the non-access stratum (NAS) message, completes registration management, connection management, and reachability management, allocates the tracking area list (TA list) and mobility management, and transparently routes the session management (SM) message to the session management network element. Among them, in the 4th generation (4G) communication, AMF can be replaced by the Mobility Management Entity (MME). In future communications such as the 6th generation (6G) communication, AMF can still be AMF, or a network element with other names that supports mobility management functions, which is not limited in the present invention.

[0048] SMF is mainly used for session management in mobile networks, such as session creation, modification, and release. Specific functions include allocating Internet Protocol (IP) addresses to users and selecting user-plane network elements that provide message forwarding functions. In 4G, SMF can be replaced by the control plane function of the Packet Data Network GateWay (PGW) (PGW-C). In future communications such as 6G, SMF can still be SMF or a network element with other names that supports session management functions, which is not limited by the present invention.

[0049] PCF includes user subscription data management functions, policy control functions, charging policy control functions, QoS control, etc. In 4G, PCF can be replaced by policy and charging rules function (PCRF). In future communications such as 6G, PCF can still be PCF or a network element with other names that supports policy control functions. This invention does not limit this.

[0050] AUSF is mainly used to verify service functions and store keys using the Extensible Authentication Protocol (EAP) to authenticate and authorize users. In 4G, AUSF can be replaced by an authentication, authorization, and accounting (AAA) server. In future communications such as 6G, AUSF can still be AUSF or a network element with other names that supports authentication functions, which is not limited in the present invention.

[0051] The UDM is primarily used to store user data, such as subscription information and authentication / authorization information. In 4G, the UDM can be replaced by a Home Subscriber Server (HSS). In future communications, such as 6G, the UDM can still be a UDM or a network element with other names that support data management functions, which is not limited in this invention.

[0052] The UPF is primarily responsible for user plane service processing, such as service routing, packet forwarding, anchoring functions, QoS mapping and execution, uplink identification and routing to the data network, downlink packet caching and notification triggering of downlink data arrival, and connection to external data networks. In 4G, the UPF can be replaced by the user plane function of the Packet Data Network GateWay (PGW) (PGW-U). In future communications such as 6G, the UPF can still be the UPF or a network element with other names that supports user plane functions, which is not limited in this invention.

[0053] (R)AN is a device that provides wireless communication functions for terminal devices, including but not limited to: the next generation base station (gnodeB, gNB) in 5G, evolved node B (eNB), radio network controller (RNC), node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved nodeB, or homenode B, HNB), baseband unit (BBU), transmission point (TRP), transmitting point (TP), mobile switching center, etc.

[0054] A user end (UE) is a device with wireless transceiver capabilities. It can be deployed on land, indoors or outdoors, handheld or in a vehicle; on water (such as ships); or in the air (such as on airplanes, balloons, and satellites). Terminal devices can include mobile phones, tablets, computers with wireless transceiver capabilities, VR terminals, AR terminals, wireless terminals used in industrial control, wireless terminals used in self-driving cars, wireless terminals used in remote medical care, wireless terminals used in smart grids, wireless terminals used in transportation safety, wireless terminals used in smart cities, and wireless terminals used in smart homes.

[0055] DN is mainly used to provide services to users, such as operator services, Internet access services, and third-party services.

[0056] As a bearer network, the core network (CN) provides an interface to the DN, offering terminal devices communication connectivity, authentication, management, communication, and data service bearering. In the network architecture shown in Figure 2, the core network functions are divided into user plane functions and control plane functions. The user plane functions are primarily responsible for packet forwarding and QoS control. The control plane functions are primarily responsible for user registration and authentication, mobility management, and issuing packet forwarding policies or QoS control policies to the UPF. The control plane functions primarily include the AMF network element and the SMF. Specifically, the AMF network element is responsible for the registration process during user access, location management during user mobility, and access to terminal devices. The SMF network element is responsible for establishing the corresponding session connection on the core network side when the user initiates a service, providing specific services to the user. In 5G, the CN can be the 5G core network (5GC).

[0057] As shown in Figure 2, the interfaces and connections in the network architecture may include: Uu, N1, N2, N3, N4, N5, N6, N7, N8, N10, N11, N12, N13, N14, N15, and N22. Uu is the interface between the terminal device and the RAN, and N1 is the control plane interface between the terminal device and the AMF network element, used to transmit control signaling between the user device and the core network control plane. Specifically, messages in the N1 connection can be transmitted by the connection between the terminal device and the RAN and the N2 connection between the RAN and the AMF network element. N2 is the control plane interface between the RAN and the AMF network element. N3 is the interface between the RAN and the user plane function. N4 is the interface between the SMF network element and the user plane function, used to transmit control signaling between the SMF network element and the user plane function. N5 is the interface between PCF and AF, N6 is the interface between user plane function and DN, N7 is the interface between SMF network element and PCF, N8 is the interface between AMF network element and UDM network element, N10 is the interface between UDM network element and SMF network element, N11 is the interface between AMF network element and SMF network element, N12 is the interface between AUSF network element and AMF network element, N13 is the interface between AUSF network element and UDM, N14 is the inter-AMF interface, N15 is the interface between AMF network element and PCF network element, and N22 is the interface between NSSF network element and AMF network element.

[0058] In one application scenario, based on the above description, the network architecture of the integrated deployment of 4G and 5G communication systems is shown in Figure 3. For 4G and 5G, the case where HSS and UDM, PCF and PCRF, SMF and PGW-C, UPF and PGW-U are respectively configured as the same device (that is, the same physical hardware, the same logical hardware or the same software) is used as an example for description. However, the content recorded in this embodiment can also be applied to the case where they are configured as different devices (that is, different physical hardware, different logical hardware or different software). For example, data can be sent and received directly between them, data can be sent and received via the N26 interface between the AMF and MME, and data can also be sent and received via the UE.

[0059] It should be noted that 5G networks and terminal devices can support CAG features, and base stations broadcast CAG cells and access 5GC. Only terminal devices with an allowed CAG list can access the CAG cell and then access the 5GC. The terminal device needs to perform PLMN+CAG selection before accessing the CAG cell. Only when the CAG cell is in the allowed CAG list can the PLMN be selected. If the terminal device is configured to only allow access to 5GC through CAG, the terminal device cannot access the network through non-CAG cells, that is, ordinary cells. The Allowed CAG list can be written in the Universal Subscriber Identity Module (USIM). If the terminal device supports CAG or the extended CAG information list, the Allowed CAG list can be configured to the terminal device through a NAS message.

[0060] Similarly, 4G networks and terminal devices can support CSG features. The base station broadcasts the CSG cell and accesses the EPC. Only terminal devices with an allowed CSG list can access the CSG cell and then access the EPC. The terminal device needs to perform PLMN selection before accessing the CSG cell, and then perform CSG selection. After performing normal PLMN selection, the terminal device determines whether the CSG cell is in the allowed CSG list. If it is, it will be accessed; if not, it will not be selected. The terminal device can access the EPC through a non-CSG cell, just like normal access. The Allowed CSG list can be configured to the terminal device through a Management Object message (OMADM), or it can be written in the USIM.

[0061] As can be seen from the above, CAG and CSG are independent features. When terminal devices move between CAG and CSG, interoperability between 5G public networks and 4G public networks cannot be supported, and business continuity cannot be guaranteed.

[0062] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and all of them fall within the scope of protection of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0063] This embodiment of the present application provides a cell determination method, as shown in FIG4 , which may include:

[0064] S410: The terminal device determines a second cell having a mapping relationship with the first cell based on the first mapping relationship.

[0065] The first mapping relationship is a mapping relationship between a closed access group CAG cell and a closed subscription group CSG cell; the first cell is one of the CAG cell and the CSG cell, and the second cell is the other of the CAG cell and the CSG cell.

[0066] It should be noted that when executing the above step S410, the terminal device can be connected to a 4G network or a 5G network.

[0067] Optionally, the first cell may be a CAG cell, and the second cell may be a CSG cell having a mapping relationship with the CAG cell; of course, the first cell may be a CSG cell, and the second cell may be a CAG cell having a mapping relationship with the CSG cell.

[0068] Here, when the first cell is a CAG cell, the terminal device is connected to the 5G network; when the first cell is a CSG cell, the terminal device is connected to the 4G network.

[0069] Optionally, the first mapping relationship may be a mapping relationship corresponding to a CAG cell, or the first mapping relationship may be a mapping relationship corresponding to a CSG cell.

[0070] In one example, the first mapping relationship includes: a mapping relationship A corresponding to a CAG cell, and a mapping relationship B corresponding to a CSG cell, wherein mapping relationship A is a mapping relationship between each CAG cell in one or more CAG cells and one or more CSG cells, and mapping relationship B is a mapping relationship between each CSG cell in one or more CSG cells and one or more CAG cells. When the first cell is a CAG cell, the first mapping relationship is mapping relationship A; when the first cell is a CSG cell, the first mapping relationship is mapping relationship B.

[0071] Optionally, for the first cell and the second cell that has a mapping relationship with the first cell, the terminal device can assume that the first cell and the second cell that have a mapping relationship belong to the same network. In this way, during the cell reselection process, only the second cell that has a mapping relationship with the first cell needs to be automatically searched, which greatly improves the cell reselection speed of the terminal device and saves system resources. At the same time, there is no need for the terminal device to reselect the network and re-initiate the initial registration or attach request to the network device.

[0072] From the above, it can be seen that in the embodiment of the present application, the terminal device pre-knows the first mapping relationship between the CAG cell and the CSG cell. After the terminal device leaves the first cell (CAG cell or CSG cell), during the cell reselection process, the terminal device only needs to automatically search for the second cell (CSG cell or CAG cell) that has a mapping relationship with the first cell, so as to search for the second cell that has a mapping relationship with the first cell. At this time, the terminal device can access the allowed CSG cell (or CAG cell). In this way, the speed of cell reselection of the terminal device is greatly improved, and the system resources are saved. At the same time, it also ensures that the terminal device can successfully select the allowed CAG cell or CSG cell to ensure service continuity.

[0073] In some embodiments, the first mapping relationship is configured by the network device to the terminal device, or determined by the terminal device, or stored in a user identification module of the terminal device.

[0074] Optionally, the network equipment includes: 4G core network equipment or 5G core network equipment.

[0075] Optionally, the terminal device may determine the allowed CAG list and allowed CSG list stored by the terminal device.

[0076] Optionally, the user identity module includes: a universal subscriber identity module (USIM) and a SIM (Subscriber Identity Module).

[0077] In some embodiments, if the first mapping relationship is a configuration of a network device to a terminal device, as shown in FIG5 , the method may include steps S510 to S520:

[0078] S510, the terminal device sends a registration request message to the network device.

[0079] The registration request message carries capability indication information, and the capability indication information is used to indicate the CAG capability information and / or CSG capability information of the terminal device.

[0080] It should be understood that the network device can be a 4G core network device, and the network device can also be a 5G core network device.

[0081] Here, the registration request message carries capability indication information of the terminal device. The registration request message is used to register a CAG subscription or a CSG subscription with the network to initiate a non-access stratum NAS process (e.g., a registration process). The registration request message may be an initial registration request or a mobility registration update request message. In an embodiment of the present application, the registration request message may be a NAS message.

[0082] In some embodiments, the capability indication information includes one or more of the following:

[0083] First capability indication information, where the first capability indication information is used to indicate whether the terminal device supports CAG and / or extended CAG;

[0084] Second capability indication information, the second capability indication information is used to indicate whether the terminal device supports CSG;

[0085] The third capability indication information is used to indicate whether the terminal device supports the home base station.

[0086] Optionally, the first capability indication information may indicate whether the terminal device supports CAG or extended CAG using one bit. For example, when the value of this bit is 1, the first capability indication information may indicate that the terminal device supports CAG or extended CAG; when the value of this bit is 0, the first capability indication information may indicate that the terminal device does not support CAG or extended CAG; and vice versa.

[0087] Of course, the first capability indication information can also indicate whether the terminal device supports CAG and extended CAG through 2 bits. For example, when the first bit value is 0 and the second bit value is 0, the first capability indication information can indicate that the terminal device does not support CAG and extended CAG; when the first bit value is 0 and the second bit value is 1, the first capability indication information can indicate that the terminal device does not support CAG but supports extended CAG; when the first bit value is 1 and the second bit value is 0, the first capability indication information can indicate that the terminal device supports CAG but does not support extended CAG; when the first bit value is 1 and the second bit value is 1, the first capability indication information can indicate that the terminal device supports CAG and extended CAG; and vice versa.

[0088] Optionally, the second capability indication information may indicate whether the terminal device supports CSG through one bit. For example, when the value of this bit is 1, the second capability indication information may indicate that the terminal device supports CSG; when the value of this bit is 0, the second capability indication information may indicate that the terminal device does not support CSG; and vice versa.

[0089] Optionally, the third capability indication information may indicate whether the terminal device supports the home base station through one bit. For example, when the value of this bit is 1, the third capability indication information may indicate that the terminal device supports the home base station; when the value of this bit is 0, the third capability indication information may indicate that the terminal device does not support the home base station; and vice versa.

[0090] It should be noted that the home base station includes a 4G home base station or a 5G home base station. When the home base station is a 5G home base station, if the third capability indication information indicates that the terminal device supports the 5G home base station, the capability indication information may include the first capability indication information and the third capability indication information; if the third capability indication information indicates that the terminal device supports the 4G home base station, the capability indication information may include the first capability indication information, the second capability indication information and the third capability indication information.

[0091] It can be understood that if the network device is a 5G core network device, the capability indication information of the terminal device can be configured in the content of the 5G mobility management (5GS mobility management, 5GMM) capability information element. When the terminal device sends a registration request message carrying the capability indication information of the terminal device to the network device, the capability indication information can be a 5GMM capability information element (5GMM capability IE), and the 5GMM capability information element is used to indicate whether the terminal device supports 5G home base stations and whether the terminal device supports CAG or extended CAG (Extended CAG, Ex-CAG). If the terminal device supports 5G home base stations, the terminal device needs to support CAG or extended CAG. In addition, if the terminal device supports 5G home base stations and supports CSG by default, the above-mentioned capability information element for indicating whether the terminal device supports CSG is not required.

[0092] S520: The network device sends a registration acceptance message to the terminal device, where the registration acceptance message is used to indicate the first mapping relationship.

[0093] It should be understood that after the network device receives the registration request message carrying capability indication information sent by the terminal device, the network device can determine the first mapping relationship based on the capability indication information of the terminal device and send a registration acceptance message indicating the first mapping relationship to the terminal device.

[0094] Optionally, after the network device receives a registration request message carrying capability indication information sent by the terminal device, the network device can obtain the contract information of the terminal device based on the capability indication information of the terminal device, wherein the contract information is used to indicate whether the terminal device is allowed to use the home base station; the network device obtains the contract data of the terminal device for determining the first mapping relationship based on the contract information of the terminal device; further, the network device sends a registration acceptance message including the first mapping relationship to the terminal device.

[0095] It should be noted that the contract information and contract data are pre-configured by the operator, and the contract information and contract data are stored in the network equipment configured with the operator. It can be understood that the contract data of the terminal device may be changeable.

[0096] Optionally, when the contract information of the terminal device indicates that the terminal device is allowed to use the home base station and the terminal device supports CAG and CSG, the contract data of the terminal device includes a CAG information list and / or an extended CAG information list, and a first mapping rule; or, the contract data of the terminal device includes a CSG information list and / or an extended CSG information list, and a second mapping rule.

[0097] Here, the first mapping rule includes the mapping relationship between the allowed CAG cells and CSG cells, and the second mapping rule includes the mapping relationship between the allowed CSG cells and CAG cells. It should be noted that the terminal device can assume that the CAG cells and CSG cells with mapping relationships belong to the same network, and the terminal device does not need to reselect the network and re-initiate the initial registration request from 4G to 5G or the 5G to 4G attachment request to the network device.

[0098] In some embodiments, if the network device is a 5G core network device, when the subscription information of the terminal device indicates that the terminal device is allowed to use the 5G home base station, and the terminal device supports CAG and CSG, the subscription data of the terminal device includes a CAG information list and / or an extended CAG information list, and a first mapping rule.

[0099] It can be understood that when the contract information of the terminal device indicates that the terminal device is allowed to use the 5G home base station, and the terminal device supports the 5G home base station, supports CAG and / or extended CAG, the contract data of the terminal device includes a CAG information list and / or an extended CAG information list, and a first mapping rule.

[0100] In some embodiments, if the network device is a 4G core network device, the subscription information of the terminal device indicates that the terminal device is allowed to use the 4G home base station, and the terminal device supports CAG and CSG, then the subscription data of the terminal device includes a CSG information list and / or an extended CSG information list, and a second mapping rule.

[0101] It can be understood that when the subscription information of the terminal device indicates that the terminal device is allowed to use the 4G home base station, and the terminal device supports the 4G home base station, supports CSG and / or extended CSG, the subscription data of the terminal device includes a CSG information list and / or an extended CSG information list, and a second mapping rule.

[0102] In some embodiments, the registration acceptance message is used to indicate a first mapping rule or a second mapping rule, the first mapping rule or the second mapping rule is used to determine a first mapping relationship, the first mapping rule is used to indicate a mapping from a CAG cell to a CSG cell, and the second mapping rule is used to indicate a mapping from a CSG cell to a CAG cell.

[0103] It should be noted that the terminal device may obtain the first mapping rule or the second mapping rule in one or more of the following ways:

[0104] The registration accept message is used to indicate the first mapping rule or the second mapping rule;

[0105] The registration acceptance message carries the first mapping rule or the second mapping rule;

[0106] The registration acceptance message includes the first mapping rule or the second mapping rule;

[0107] The terminal device determines the first mapping rule or the second mapping rule based on the registration acceptance message.

[0108] Here, if the network device is a 5G core network device, the registration accept message is used to indicate a first mapping rule, or the registration accept message includes the first mapping rule, or the registration accept message carries the first mapping rule. The first mapping rule is used to determine a first mapping relationship, and the first mapping rule is used to indicate the allowed mapping of CAG cells to CSG cells.

[0109] Here, if the network device is a 4G core network device, the registration accept message is used to indicate the second mapping rule, or the registration accept message includes the second mapping rule, or the registration accept message carries the second mapping rule. The second mapping rule is used to determine the first mapping relationship, and the second mapping rule is used to indicate the allowed mapping of the CAG cell to the CSG cell.

[0110] In one possible implementation, the network device is a 5G core network device.

[0111] In some embodiments, the first mapping rule is included in the extended CAG information list; or, the first mapping rule and the extended CAG information list are different information elements.

[0112] Here, the first mapping rule may be a part of the extended CAG information list, or may be an information element different from the extended CAG information list, that is, the first mapping rule may be an independently configured information element.

[0113] Optionally, the configuration of the first mapping rule may be determined based on first capability indication information of whether the terminal device supports CAG and / or extended CAG.

[0114] In one example, when the terminal device supports extended CAG, or when the terminal device supports CAG and extended CAG, the first mapping rule can be configured in the extended CAG information list and become a part of the extended CAG information list; or, the first mapping rule can also be an information element different from the extended CAG information list.

[0115] In another example, when the terminal device does not support extended CAG, the first mapping rule may be a separate information element.

[0116] In another example, when the terminal device only supports CAG, the first mapping rule can be a separately configured information element. It should be noted that when the terminal device only supports CAG, considering backward compatibility issues, the first mapping rule is configured as a separate information element, that is, the first mapping rule is not included in the CAG information list.

[0117] In this way, for CAG cells and CSG cells, there is no need to modify and adjust the CSG-related configurations on the 4G network side. Only the CAG-related configurations need to be modified on the 5G network side to establish a mapping relationship between the CAG cell and the CSG cell. In this way, after the terminal device moves from the CAG cell (or CSG cell) to the CSG cell (or CAG cell) that has a mapping relationship with the CAG cell (or CSG cell), the terminal device can access the allowed CSG cell (or CAG cell), thereby ensuring that the terminal device can successfully select the allowed CAG cell or CSG cell, ensuring the success of subsequent processes, and ensuring business continuity.

[0118] In some embodiments, if the first mapping rule is included in the extended CAG information list, the first mapping rule is included in the CAG additional information list of the extended CAG information list.

[0119] Here, in order to use CAG, a terminal device that supports CAG indicated as part of the terminal device's 5GMM core network capabilities may be pre-configured or (re)configured with the following CAG-related information. If the terminal device supports CAG and / or extended CAG, the network device may provide the terminal device with a CAG-related configuration consisting of zero or more entries (such as a CAG information list and / or an extended CAG information list, which contains a list of allowed CAGs for each PLMN). It should be noted that the above-mentioned CAG-related configuration is (pre)configured or reconfigured in the terminal device configuration update process or other 5GMM processes (such as a registration process or a service process).

[0120] In some embodiments, the extended CAG information list also includes public land mobile communication network PLMN information.

[0121] It should be understood that the PLMN information can be information used to determine the PLMN identity document (PLMN-ID), and the PLMN information corresponds to the CAG additional information list. It should be noted that the PLMN is encoded by the Mobile Country Code (MCC) and the Mobile Network Code (MNC). MCC and MNC are composed of three digits, and each digit has a value range of 0-9, of which MNC can be two digits or three digits. When MNC is two digits, the highest digit is filled with 15 (1111). It should be noted that the PLMN encoding method can use a variety of different encoding methods, but in the same configuration, the same encoding method is used.

[0122] Here, the extended CAG information list may include PLMN information, and the PLMN information can represent the PLMN to which the CAG cell list allowed by the terminal device belongs.

[0123] In one example, if the terminal device currently searches for a CAG cell, the terminal device needs to perform PLMN+CAG selection before accessing the CAG cell. Only PLMNs whose CAG cell is in the allowed CAG list can be selected, thereby accessing 5GC through the CAG cell.

[0124] In some embodiments, the extended CAG information list also includes PLMN information corresponding to the CAG additional information list.

[0125] Here, the extended CAG information list includes multiple entries, each entry includes at least a CAG additional information list, and each CAG additional information list may include PLMN information, which can represent the PLMN to which the CAG cell list allowed by the terminal device belongs.

[0126] In one example, for the extended CAG information list, each entry includes at least a CAG additional information list, and the CAG additional information list includes at least the following information:

[0127] a) PLMN identity (PLMN ID); the PLMN ID may be the identity of the PLMN to which all CAG cells included in the CAG additional information list belong.

[0128] b) An “allowed CAG list” corresponding to zero or more CAG cells (eg, CAG-IDs).

[0129] c) CAG additional information list. It should be noted that in the terminal device configuration update process or other 5GMM process (such as registration process or service process), the above CAG related configuration is used for (pre-) configuration or reconfiguration. In a PLMN, the terminal device should only consider the CAG information provided for that PLMN.

[0130] In some embodiments, the first mapping rule includes: first information corresponding to each CAG cell in one or more CAG cells, where the first information is used to indicate a CSG cell to which the CAG cell is mapped.

[0131] In the embodiment of the present application, the first mapping rule includes: first information corresponding to each CAG cell in one or more CAG cells, so as to determine one or more CSG cells mapped to each CAG cell according to the indication of the first information.

[0132] In some embodiments, the first information includes one or more of the following information:

[0133] Cell ID of the CAG cell;

[0134] PLMN information corresponding to the CAG cell;

[0135] First indication information; the first indication information is used to indicate whether the CAG cell has the mapped CSG cell;

[0136] The first list: The first list is used to indicate one or more CSG cells mapped by the CAG cell.

[0137] Optionally, information included in the first information corresponding to each CAG cell in the one or more CAG cells is associated with a configuration manner of the first mapping rule.

[0138] Optionally, the first information may include a cell identifier of the CAG cell, the first indication information, and the first list. Of course, the first information may also include PLMN information corresponding to the CAG cell.

[0139] It can be understood that if the first mapping rule is configured in the extended CAG information list, that is, the first mapping rule is included in the extended CAG information list, then the first information corresponding to each CAG cell in one or more CAG cells includes at least the cell identifier of the CAG cell, the first indication information for indicating whether the CAG cell has a mapped CSG cell, and the first list for indicating one or more CSG cells mapped by the CAG cell.

[0140] It should be noted that the first indication information in the first information may be an optional parameter or a mandatory parameter. When it is not stated that the first indication information in the first information is an optional parameter, it can be understood that the first indication information is a mandatory parameter.

[0141] It should also be noted that since the first mapping rule includes one or more CAG cells belonging to the PLMN information corresponding to the CAG additional information list in the extended CAG information list, there is no need to configure the PLMN information corresponding to one or more CAG cells in the first mapping rule such as the first information.

[0142] It can be understood that if the first mapping rule is configured separately, that is, the first mapping rule and the extended CAG information list are different information elements, then the first information corresponding to each CAG cell in one or more CAG cells includes at least the cell identifier of the CAG cell, the PLMN information corresponding to the CAG cell, the first indication information for indicating whether the CAG cell has a mapped CSG cell, and the first list for indicating one or more CSG cells mapped by the CAG cell.

[0143] It should be noted that the first indication information in the first information may be an optional parameter or a mandatory parameter. When it is not stated that the first indication information in the first information is an optional parameter, it can be understood that the first indication information is a mandatory parameter.

[0144] It should also be noted that since the first mapping rule is configured separately, it is necessary to configure corresponding PLMN information for each CAG cell in the one or more CAG cells included in the first mapping rule, such as the first information. It should be noted that the PLMN information corresponding to one or more CAG cells can be the same or different.

[0145] In some embodiments, the first list includes: a cell identifier of each of the one or more CSG cells, or a cell identifier of each of the one or more CSG cells and PLMN information corresponding to each of the CSG cells.

[0146] Here, the information included in the first list is related to whether the PLMN to which the CAG cell corresponding to the first list belongs is the same as the PLMN to which the CSG cell included in the first list belongs.

[0147] If the PLMN to which the CAG cell corresponding to the first list belongs is the same as the PLMN to which the CSG cells included in the first list belong, the first list includes the cell identifier of each CSG cell in one or more CSG cells mapped by the CAG cell corresponding to the first list.

[0148] It should be noted that since the PLMN to which each CSG cell in one or more CSG cells belongs has been configured, and the PLMN to which the CAG cell corresponding to the first list belongs is the same as the PLMN to which the CSG cell included in the first list belongs, the first list corresponds to the CAG cell, so there is no need to add additional bytes in the first list to identify the PLMN to which each CSG cell in one or more CSG cells mapped by the CAG cell belongs, thereby mapping the CSG cell and the CAG cell belonging to the same PLMB.

[0149] If the PLMN to which the CAG cell corresponding to the first list belongs is the same as the PLMN to which the CSG cells included in the first list belong, the first list includes the cell identifier of each CSG cell in one or more CSG cells mapped by the CAG cell corresponding to the first list.

[0150] It should be noted that since the PLMN to which each CSG cell in one or more CSG cells belongs has been configured, the PLMN to which the CAG cell corresponding to the first list belongs is different from the PLMN to which the CSG cells included in the first list belong. However, different PLMNs can correspond to the same network, it is necessary to add an additional byte to the first list to identify the PLMN to which each CSG cell in one or more CSG cells mapped by the CAG cell belongs, so as to map the CSG cells and CAG cells belonging to different PLMNs.

[0151] It should be noted that the PLMN information corresponding to each CSG cell (also known as the PLMN to which the CSG cell belongs) is configured before the cell identifier of the corresponding CSG cell.

[0152] In another possible implementation, the network device is a 4G core network device.

[0153] In some embodiments, the second mapping rule is included in the extended CSG information list; or, the second mapping rule and the extended CSG information list are different information elements.

[0154] Here, the second mapping rule can be part of the extended CSG information list, or the second mapping rule can be an information element different from the extended CSG information list, that is, the second mapping rule can be a separately configured information element. The configuration method of the second mapping rule is similar to that of the first mapping rule, and is not specifically described in the embodiments of the present application.

[0155] Here, the configuration of the second mapping rule may be determined based on the first capability indication information of whether the terminal device supports CSG and / or extended CSG.

[0156] In one example, when the terminal device supports extended CSG, or when the terminal device supports CSG and extended CSG, the second mapping rule can be configured in the extended CSG information list and become a part of the extended CSG information list; or, the second mapping rule can also be an information element different from the extended CSG information list.

[0157] In another example, when the terminal device does not support extended CSG, the second mapping rule may be a separate information element.

[0158] In another example, when the terminal device only supports CSG, the second mapping rule can be a separate information element. It should be noted that when the terminal device only supports CSG, considering backward compatibility issues, the second mapping rule is configured as a separate information element, that is, the second mapping rule is not included in the CSG information list.

[0159] In this way, for CAG cells and CSG cells, there is no need to modify and adjust the CAG-related configurations on the 5G network side. Only the CSG-related configurations need to be modified on the 4G network side to establish a mapping relationship between the CAG cell and the CSG cell. In this way, after the terminal device leaves the CAG cell (or CSG cell), during the cell reselection process, the terminal device only needs to automatically search for the CSG cell (or CAG cell) that has a mapping relationship with the CAG cell (or CSG cell). If a CSG cell (or CAG cell) with a mapping relationship is searched, the terminal device can access the allowed CSG cell (or CAG cell). In this way, the cell reselection speed of the terminal device is greatly improved, and the system resources are saved. At the same time, it also ensures that the terminal device can successfully select the allowed CAG cell or CSG cell to ensure service continuity.

[0160] In some embodiments, if the second mapping rule is included in the extended CSG information list, the second mapping rule is included in the CSG additional information list of the extended CSG information list.

[0161] Here, in order to use CSG, a terminal device that supports CSG indicated as part of the terminal device's 4GMM core network capabilities may be pre-configured or (re)configured with the following CSG-related information. If the terminal device supports CSG and / or extended CSG, the network device may provide the terminal device with a CSG-related configuration consisting of zero or more entries (such as a CSG information list and / or an extended CSG information list, which contains a list of allowed CSGs for each PLMN). It should be noted that the above-mentioned CSG-related configuration is (pre)configured or reconfigured in the terminal device configuration update process or other 4GMM processes (such as a registration process or a service process).

[0162] In some embodiments, the extended CSG information list also includes PLMN information.

[0163] It should be understood that PLMN information can be information used to determine PLMN-ID, and PLMN information corresponds to the CSG additional information list. It should be noted that PLMN is encoded by the Mobile Country Code (MCC) and the Mobile Network Code (MNC). MCC and MNC are composed of three digits, and each digit has a value range of 0-9, of which MNC can be two digits or three digits. When MNC is two digits, the highest digit is filled with 15 (1111). It should be noted that the PLMN encoding method can use a variety of different encoding methods, but in the same configuration, the same encoding method is used.

[0164] Here, the extended CSG information list may include PLMN information, and the PLMN information can represent the PLMN to which the CSG cell list allowed by the terminal device belongs.

[0165] In one example, if a terminal device currently searches for a CSG cell, it must first perform PLMN selection and then CSG selection before accessing the CSG cell. After performing normal PLMN selection, the terminal device then determines whether the CSG cell is in the allowed CSG list. Only if the CSG cell is in the allowed CSG list can the terminal device access the EPC through the CSG cell.

[0166] In some embodiments, the extended CSG information list also includes PLMN information corresponding to the CSG additional information list.

[0167] Here, the extended CSG information list includes multiple entries, each entry includes at least a CSG additional information list, and each CSG additional information list may include PLMN information, which can represent the PLMN to which the CSG cell list allowed by the terminal device belongs.

[0168] In one example, for the extended CSG information list, each entry includes at least a CSG additional information list, and the CSG additional information list includes at least the following information:

[0169] a) PLMN identity (PLMN ID); the PLMN ID may be the identity of the PLMN to which all CSG cells included in the CSG additional information list belong.

[0170] b) An "allowed CSG list" corresponding to zero or more CSG cells (such as CSG-IDs).

[0171] c) CSG additional information list. It should be noted that during the terminal device configuration update process or other 4GMM processes (such as registration process or service process), the above CSG related configuration is (pre) configured or reconfigured. In a PLMN, the terminal device should only consider the CSG information provided for that PLMN.

[0172] In some embodiments, the second mapping rule includes: second information corresponding to each CSG cell in the one or more CSG cells, where the second information is used to indicate the CSG cell to which the CSG cell is mapped.

[0173] In the embodiment of the present application, the second mapping rule includes: second information corresponding to each of the one or more CSG cells, so that one or more CSG cells mapped to each CSG cell are determined according to an instruction of the second information.

[0174] In some embodiments, the second information includes one or more of the following information:

[0175] The cell identifier of the CSG cell;

[0176] PLMN information corresponding to the CSG cell;

[0177] Second indication information: The second indication information is used to indicate whether the CSG cell has the mapped CAG cell;

[0178] Second list: The second list is used to indicate one or more CAG cells mapped by the CSG cell.

[0179] Optionally, the information included in the second information corresponding to each CSG cell in the one or more CSG cells is associated with the configuration method of the second mapping rule.

[0180] Optionally, the second information may include a cell identifier of the CSG cell, second indication information, and a second list. Of course, the second information may also include PLMN information corresponding to the CSG cell.

[0181] It can be understood that if the second mapping rule is configured in the extended CSG information list, that is, the second mapping rule is included in the extended CSG information list, then the second information corresponding to each CSG cell in one or more CSG cells includes at least the cell identifier of the CSG cell, the second indication information for indicating whether the CSG cell has the mapped CAG cell, and the second list for indicating one or more CAG cells mapped by the CSG cell.

[0182] It should be noted that the second indication information in the second information may be an optional parameter or a mandatory parameter. When it is not stated that the second indication information in the second information is an optional parameter, it can be understood that the second indication information is a mandatory parameter.

[0183] It should also be noted that since the second mapping rule includes PLMN information corresponding to one or more CSG cells belonging to the CSG additional information list in the extended CSG information list, there is no need to configure PLMN information corresponding to one or more CSG cells in the second mapping rule such as the second information.

[0184] It can be understood that if the second mapping rule is configured separately, that is, the second mapping rule and the extended CSG information list are different information elements, then the second information corresponding to each CSG cell in one or more CSG cells includes at least the cell identifier of the CSG cell, the PLMN information corresponding to the CSG cell, the second indication information for indicating whether the CSG cell has the mapped CSG cell, and the second list for indicating one or more CAG cells mapped by the CSG cell.

[0185] It should be noted that the second indication information in the second information may be an optional parameter or a mandatory parameter. When it is not stated that the second indication information in the second information is an optional parameter, it can be understood that the second indication information is a mandatory parameter.

[0186] It should also be noted that since the second mapping rule is configured separately, it is necessary to configure corresponding PLMN information for each CSG cell in the one or more CSG cells included in the second mapping rule, such as the second information. It should be noted that the PLMN information corresponding to one or more CSG cells can be the same or different.

[0187] In some embodiments, the second list includes: a cell identifier of each CAG cell in one or more CAG cells, or a cell identifier of each CAG cell in one or more CAG cells and PLMN information corresponding to each CAG cell.

[0188] Here, the information included in the second list is related to whether the PLMN to which the CSG cell corresponding to the second list belongs is the same as the PLMN to which the CAG cell included in the second list belongs.

[0189] If the PLMN to which the CSG cell corresponding to the second list belongs is the same as the PLMN to which the CAG cell included in the second list belongs, the second list includes the cell identifier of each CAG cell in one or more CAG cells mapped to the CSG cell corresponding to the second list.

[0190] It should be noted that since the PLMN to which each CSG cell in one or more CSG cells belongs has been configured, and the PLMN to which the CSG cell corresponding to the second list belongs is the same as the PLMN to which the CAG cell included in the second list belongs, the second list corresponds to the CSG cell, so there is no need to add additional bytes in the second list to identify the PLMN to which each CAG cell in one or more CAG cells mapped by the CSG cell belongs, thereby mapping the CSG cell and the CAG cell belonging to the same PLMB.

[0191] If the PLMN to which the CSG cell corresponding to the second list belongs is the same as the PLMN to which the CAG cell included in the second list belongs, the second list includes the cell identifier of each CAG cell in one or more CAG cells mapped to the CSG cell corresponding to the second list.

[0192] It should be noted that since the PLMN to which each CSG cell in one or more CSG cells belongs has been configured, the PLMN to which the CSG cell corresponding to the second list belongs is different from the PLMN to which the CAG cell included in the second list belongs. However, different PLMNs can correspond to the same network, it is necessary to add an additional byte to the second list to identify the PLMN to which each CAG cell in one or more CAG cells mapped by the CSG cell belongs, so as to map the CSG cells and CAG cells belonging to different PLMNs.

[0193] It should be noted that the PLMN information corresponding to each CAG cell (also called the PLMN to which the CAG cell belongs) is configured before the cell identifier of the corresponding CAG cell.

[0194] It is understandable that, whether it is a 5G core network or a 4G core network, the network device may include a first network element and a second network element. If the network device is a 5G core network device, the first network element may be an AMF and the second network element may be an UDM+HSS; if the network device is a 4G core network device, the first network element may be an MMF and the second network element may be an UDM+HSS. In this case, the interaction between the terminal device and the network element of the network device, as well as between the network elements, is shown in Figure 6, including:

[0195] S601, a terminal device sends a registration request message to a first network element, wherein the registration request message carries capability indication information, and the capability indication information is used to indicate CAG capability information and / or CSG capability information of the terminal device.

[0196] At this time, the first network element receives a registration request message carrying capability indication information sent by the terminal device.

[0197] S602: The first network element sends a request message to the second network element, wherein the request message carries capability indication information and is used to request the contract data of the terminal device.

[0198] Here, the request information is used to obtain the contract data of the terminal device. The request information may include the device identification of the terminal device, so that the second network element obtains the contract data of the terminal device based on the device identification; or, the request information does not include the device identification of the terminal device, but because the terminal device and the first network element and the second network element have performed one or more interactions between this interaction, the second network element already knows the device identification of the terminal device, and the second network element can directly obtain the contract data of the terminal device. This embodiment of the present application does not make specific limitations on this.

[0199] At this time, the second network element receives the request information carrying capability indication information sent by the first network element. When the second network element determines that the contract information of the terminal device indicates that the terminal device is allowed to use the 5G home base station and the terminal device supports CAG capability and CSG capability, the second network element obtains the contract data of the terminal device, and the contract data may include the first mapping rule or the second mapping rule; or, the contract data may include a CAG information list and / or an extended CAG information list, and the first mapping rule; or, the contract data may include a CSG information list and / or an extended CSG information list, and the second mapping rule.

[0200] S603, the first network element receives the subscription data of the terminal device sent by the second network element, wherein the subscription data includes the first mapping rule or the second mapping rule.

[0201] At this time, the second network element sends the subscription data of the terminal device to the first network element.

[0202] S604, the terminal device receives the registration acceptance message sent by the first network element.

[0203] The registration accept message is used to indicate the first mapping rule or the second mapping rule, or the registration accept message carries the first mapping rule or the second mapping rule, or the registration accept message includes the first mapping rule or the second mapping rule. The first mapping rule is used to determine the first mapping relationship, the first mapping rule is used to indicate the mapping from the allowed CAG cell to the CSG cell, and the second mapping rule is used to indicate the mapping from the allowed CSG cell to the CAG cell.

[0204] In some embodiments, when the subscription information of the terminal device indicates that the terminal device is allowed to use the 5G home base station and the terminal device supports CAG and / or extended CAG, the subscription data of the terminal device includes a CAG information list and / or an extended CAG information list, and a first mapping rule.

[0205] It should be noted that the way in which the terminal device, the first network element and the second network element interact to obtain the second mapping rule is similar to the way in which the terminal device obtains the first mapping rule, and this application does not impose any specific restrictions.

[0206] In some embodiments, if the first mapping relationship is a configuration of a network device to a terminal device, as shown in FIG7 , the method may include:

[0207] S710: The network device sends a configuration update command message to the terminal device.

[0208] The configuration update command message is used to indicate the first mapping relationship.

[0209] At this time, the terminal device receives a configuration update command message sent by the network device. Optionally, the above-mentioned configuration update command message can also be a configuration update command, or a configuration command, which is not limited in this application.

[0210] In some embodiments, the configuration update command message is used to indicate a first mapping rule or a second mapping rule, the first mapping rule or the second mapping rule is used to determine a first mapping relationship, the first mapping rule is used to indicate a mapping from a CAG cell to a CSG cell, and the second mapping rule is used to indicate a mapping from a CSG cell to a CAG cell.

[0211] It should be noted that the terminal device may obtain the first mapping rule or the second mapping rule in one or more of the following ways:

[0212] The configuration update command message is used to indicate the first mapping rule or the second mapping rule;

[0213] The configuration update command message carries the first mapping rule or the second mapping rule;

[0214] The configuration update command message includes the first mapping rule or the second mapping rule;

[0215] The terminal device determines the first mapping rule or the second mapping rule based on the configuration update command message.

[0216] Optionally, the network device sends a configuration update command message to the terminal device, which is related to changes in the network side deployment and / or changes in the contract data of the terminal device. Of course, the network device sends a configuration update command message to the terminal device is also related to changes in other data on the network side or the terminal side, which is not specifically explained in this application.

[0217] In one example, the network deployment on the network side changes, such as adding or reducing a subnet. The network device needs to make corresponding changes to the configuration of the first mapping rule or the second mapping rule of the terminal device based on the changed network deployment, and use the configuration update command message to transmit the configuration information of the changed first mapping rule or the second mapping rule to the terminal device.

[0218] In another example, the contract data of the terminal device changes, such as signing a contract with a newly added CSG cell. The network device needs to make corresponding changes to the configuration of the first mapping rule or the second mapping rule of the terminal device based on the changed contract data of the terminal device, and use the configuration update command message to transmit the configuration information of the changed first mapping rule or the second mapping rule to the terminal device.

[0219] In one possible implementation, the network device is a 5G core network device.

[0220] In some embodiments, the first mapping rule is included in the extended CAG information list; or, the first mapping rule and the extended CAG information list are different information elements.

[0221] In some embodiments, if the first mapping rule is included in the extended CAG information list, the first mapping rule is included in the CAG additional information list of the extended CAG information list.

[0222] In some embodiments, the extended CAG information list also includes PLMN information.

[0223] In some embodiments, the first mapping rule includes: first information corresponding to each CAG cell in one or more CAG cells, where the first information is used to indicate a CSG cell to which the CAG cell is mapped.

[0224] In some embodiments, the first information includes one or more of the following information:

[0225] Cell ID of the CAG cell;

[0226] PLMN information corresponding to the CAG cell;

[0227] First indication information; the first indication information is used to indicate whether the CAG cell has the mapped CSG cell;

[0228] The first list: The first list is used to indicate one or more CSG cells mapped by the CAG cell.

[0229] Here, the information included in the first information corresponding to each CAG cell in the one or more CAG cells is associated with the configuration method of the first mapping rule.

[0230] In some embodiments, the first list includes: a cell identifier of each of the one or more CSG cells, or a cell identifier of each of the one or more CSG cells and PLMN information corresponding to each of the CSG cells.

[0231] It should be noted that, for the description of the same steps and contents in this embodiment as those in other embodiments, reference can be made to the description in other embodiments and will not be repeated here.

[0232] In another possible implementation, the network device is a 4G core network device.

[0233] In some embodiments, the second mapping rule is included in the extended CSG information list; or, the second mapping rule and the extended CSG information list are different information elements.

[0234] In some embodiments, if the second mapping rule is included in the extended CSG information list, the second mapping rule is included in the CSG additional information list of the extended CSG information list.

[0235] In some embodiments, the extended CSG information list also includes PLMN information.

[0236] In some embodiments, the second mapping rule includes: second information corresponding to each CSG cell in the one or more CSG cells, where the second information is used to indicate the CSG cell to which the CSG cell is mapped.

[0237] In some embodiments, the second information includes one or more of the following information:

[0238] The cell identifier of the CSG cell;

[0239] PLMN information corresponding to the CSG cell;

[0240] Second indication information: The second indication information is used to indicate whether the CSG cell has the mapped CAG cell;

[0241] Second list: The second list is used to indicate one or more CAG cells mapped by the CSG cell.

[0242] In some embodiments, the second list includes: a cell identifier of each CAG cell in one or more CAG cells, or a cell identifier of each CAG cell in one or more CAG cells and PLMN information corresponding to each CAG cell.

[0243] It should be noted that, for the description of the same steps and contents in this embodiment as those in other embodiments, reference can be made to the description in other embodiments and will not be repeated here.

[0244] In some embodiments, the first mapping relationship is determined by the terminal device. Before the terminal device determines the second cell having a mapping relationship with the first cell based on the first mapping relationship in step 401, the following steps are included:

[0245] The terminal device determines a first mapping rule or a second mapping rule based on the CAG information list and the CSG information list, wherein the first mapping rule or the second mapping rule is used to determine the first mapping relationship.

[0246] Optionally, the CAG information list is a CAG information list allowed by the network device, and the CSG information list is a CSG information list allowed by the network device. The allowed CAG information list and the allowed CSG information list can be pre-set, or they can be sent to the terminal device by the core network network element, such as the AMF network element sending the allowed CAG information list to the terminal device, and the MME network element sending the allowed CSG information list to the terminal device. It should be noted that the terminal device can also obtain the allowed CAG information list and CSG information list through other means, and this application does not limit this.

[0247] Optionally, after obtaining the CAG information list and the CSG information list, the terminal device can determine a first mapping rule for indicating the mapping of the CAG cell to the CSG cell, or a second mapping rule for indicating the mapping of the CSG cell to the CAG cell based on the CAG information list and the CSG information list, so as to determine the first mapping relationship based on the first mapping rule or the second mapping rule.

[0248] In some embodiments, the terminal device determines the first mapping rule or the second mapping rule based on the CAG information list and the CSG information list, including:

[0249] Based on the CAG information list and the CSG information list, the terminal device maps the CAG cell and the CSG cell that meet the preset conditions and determines the first mapping rule or the second mapping rule.

[0250] Among them, the CAG information list includes the PLMN information corresponding to each CAG cell in one or more CAG cells, and the CSG information list includes the PLMN information corresponding to each CSG cell in one or more CSG cells. The preset condition includes that the PLMN information corresponding to the CAG cell and the PLMN information corresponding to the CSG cell are the same or equivalent.

[0251] In an embodiment of the present application, after obtaining the CAG information list and the CSG information list, the terminal device can compare the PLMN information corresponding to each CAG cell in one or more CAG cells included in the CAG information list with the PLMN information corresponding to each CSG cell in one or more CSG cells included in the CSG information list. If the PLMN information corresponding to the CAG cell is the same as or equivalent to the PLMN information corresponding to the CSG cell, it is determined that the CAG cell and the CAG cell meet the preset conditions. At this time, the terminal device maps the CAG cell and the CSG cell that meet the preset conditions, thereby establishing a mapping relationship between the CAG cell and the CSG cell with the same PLMN or equivalent PLMN, and obtains a first mapping rule for indicating the mapping of the CAG cell to the CSG cell, and a second mapping rule for indicating the mapping of the CSG cell to the CAG cell, so as to determine the first mapping relationship based on the first mapping rule or the second mapping rule. In this way, the terminal device knows in advance the first mapping relationship between the CAG cell and the CSG cell. After the terminal device moves from the CAG cell (or CSG cell) to the CSG cell (or CAG cell) that has a mapping relationship with the CAG cell (or CSG cell), the terminal device can access the allowed CSG cell (or CAG cell), thereby ensuring that the terminal device can successfully select the allowed CAG cell or CSG cell, ensuring the success of subsequent processes, and ensuring business continuity.

[0252] In some embodiments, before the terminal device determines, based on the first mapping relationship, the second cell having a mapping relationship with the first cell in step 401, the following steps may be performed:

[0253] The non-access layer NAS of the terminal device sends the first mapping rule or the second mapping rule to the access layer; the access layer of the terminal device determines the first mapping relationship based on the first mapping rule or the second mapping rule.

[0254] Optionally, the terminal device receives a registration acceptance message or a configuration update command message sent by the network device, and the registration acceptance message or the configuration update command message carries the first mapping rule or the second mapping rule. The terminal device can store the first mapping rule or the second mapping rule in a non-volatile memory.

[0255] Here, the non-volatile memory may include, but is not limited to, read-only memory (ROM) and flash memory. ROM may include, but is not limited to, programmable read-only memory (PROM), electrically alterable read-only memory (EAROM), erasable programmable read-only memory (EPROM), and electrically erasable programmable read-only memory (EEPROM).

[0256] Optionally, after the terminal device receives the first mapping rule or the second mapping rule sent by the network device, the NAS layer of the terminal device sends the first mapping rule or the second mapping rule to the access layer, such as the RRC layer. The access layer of the terminal device receives the first mapping rule or the second mapping rule, and determines the first mapping relationship between the CAG cell and the CSG cell based on the first mapping rule and the second mapping rule, so as to determine, based on the first mapping relationship, that after the terminal device moves from the CAG cell (or CSG cell) to the CSG cell (or CAG cell) that has a mapping relationship with the CAG cell (or CSG cell), the terminal device can access the allowed CSG cell (or CAG cell), thereby ensuring that the terminal device can successfully select the allowed CAG cell or CSG cell and ensure service continuity.

[0257] In some embodiments, before the terminal device determines, based on the first mapping relationship, a second cell having a mapping relationship with the first cell in step 402, the method further includes:

[0258] The terminal device obtains a measurement result of a signal of the first cell, and when the measurement result does not meet a signal condition, determines that the terminal device leaves the first cell.

[0259] It should be noted that the measurement results may include one or more of the following measurement parameters: reference signal received power (RSRP), reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR), and other parameters. This embodiment of the present application is not limited to this.

[0260] It should also be noted that the signal condition may be that the measurement result is greater than or equal to a first threshold value, and the first threshold value may include multiple (for example, a first RSRP threshold value, a first RSRQ threshold value, a first SINR threshold value, etc.), and different first threshold values ​​may correspond to different measurement parameters. The measurement result exceeding the first threshold value can be understood as that all measurement parameters exceed the corresponding first threshold value, or any one or several of the measurement parameters exceed the corresponding first threshold value, and the embodiment of the present application does not limit this. It should be noted that the first threshold value may be predefined or network configured. For example, the network device may configure the first threshold value through broadcast signaling, high-layer signaling, or physical layer signaling, and the embodiment of the present application does not limit this.

[0261] It can be understood that when the measurement result of the signal of the first cell detected by the terminal device is less than the first threshold, it indicates that the terminal device has left the first cell.

[0262] Furthermore, in some embodiments, after the terminal device determines, based on the first mapping relationship, a second cell having a mapping relationship with the first cell in step 402, the method further includes:

[0263] The terminal device performs mobility registration or tracking area update based on the second cell.

[0264] It can be understood that when the terminal device leaves the current first cell (such as the current CAG cell or the current CSG cell), the terminal device searches for the second cell, and there is a first mapping relationship between the second cell and the first cell (such as the CSG cell corresponding to the current CAG cell, or the CAG cell corresponding to the current CSG cell), that is, the terminal device moves to the second cell (CSG cell or CAG cell) mapped by the first cell; at this time, the terminal device does not need to reselect for initial registration, but initiates mobility registration or tracking area update (Tracking Area Update, TAU) based on the second cell to achieve cell reselection. In this way, for CSG cells or CAG cells under different core networks, the terminal device does not need to reselect the network registration. By initiating mobility registration or tracking area update, the CSG cell or CAG cell under the core network is reselected, which greatly improves the speed of cell reselection of the terminal device and saves system resources. At the same time, it also ensures that the terminal device can successfully select the allowed CAG cell or CSG cell to ensure service continuity.

[0265] In one example, if the first mapping rule or the second mapping rule is configured for a network device, after a terminal device performs mobility registration or tracking area update based on a second cell, the network device uses the first mapping rule or the second mapping rule to check whether a mapping relationship exists between the first cell and the second cell. If a mapping relationship exists between the first cell and the second cell, the network device accepts the request; if no mapping relationship exists between the first cell and the second cell, the network device rejects the request. In this way, when a terminal device performs mobility registration or tracking area update based on a second cell that has a mapping relationship with the first cell, the network device will recheck, i.e., re-determine the mapping relationship between the first cell and the second cell, thereby improving the accuracy of the terminal device's cell access.

[0266] In some embodiments, when the terminal device does not determine a second cell having a mapping relationship with the first cell based on the first mapping relationship, the method further includes:

[0267] When the terminal device fails to determine the second cell, the terminal device selects a third cell. The third cell is the same as or equivalent to the PLMN to which the first cell belongs, and the third cell does not support CSG and / or CAG. The terminal device performs mobility registration or tracking area update based on the third cell.

[0268] It is understandable that when the terminal device leaves the current first cell (such as the current CAG cell or the current CSG cell), the terminal device cannot search for the second cell that has the first mapping relationship with the first cell; at this time, the terminal device selects a third cell (i.e., an ordinary cell) under the same or equivalent PLMN as the first cell, and the third cell does not support CSG and / or CAG. At this time, the terminal device still does not need to reselect for initial registration, but initiates mobility registration or TAU based on the third cell to achieve cell reselection. This greatly improves the speed of cell reselection of the terminal device and saves system resources. At the same time, it also ensures that the terminal device can successfully select the allowed CAG cell or CSG cell to ensure service continuity.

[0269] In some embodiments, when the terminal device does not determine a second cell having a mapping relationship with the first cell based on the first mapping relationship, the method further includes:

[0270] When the terminal device fails to determine the second cell and the third cell, the terminal device reselects the network and re-initiates initial registration to the network device; wherein, the third cell is the same as or equivalent to the PLMN to which the first cell belongs, and the third cell does not support CSG and / or CAG.

[0271] It is understandable that when the terminal device leaves the current first cell (such as the current CAG cell or the current CSG cell), the terminal device cannot search for the second cell having a first mapping relationship with the first cell, nor can it search for a third cell under the same or equivalent PLMN as the first cell (that is, an ordinary cell that does not support CSG and / or CAG). At this time, the terminal device has no cell to reselect. At this time, the terminal device needs to reselect the network and re-initiate initial registration to the network device so that the terminal device can access the selected cell.

[0272] Below, taking the terminal device as UE, the network device as 5G core network device, the network device including a first network element and a second network element, the first network element as AMF, and the second network element as UDM as an example, the cell determination method provided in the embodiment of the present application is further explained.

[0273] Example 1

[0274] As shown in FIG8 , the cell determination method provided in the embodiment of the present application includes:

[0275] S801. The UE sends a registration request to the AMF, where the registration request carries a UE capability indication, which is used to indicate the UE's CAG capability and / or CSG capability.

[0276] Optionally, the UE capability indication includes one or more of the following:

[0277] A first capability indication, where the first capability indication is used to indicate whether the UE supports CAG and / or extended CAG;

[0278] A second capability indication, where the second capability indication is used to indicate whether the UE supports CSG;

[0279] The third capability indication is used to indicate whether the UE supports 5G Femto.

[0280] Optionally, the first capability indication and the third capability indication may be 5GMM capability IE, and the second capability indication may be an S1UE network capability information element (S1UE network capability IE).

[0281] Optionally, for the third capability indication, 5G Femto is a bit in the 5GMM capability IE. The bit value of 5G Femto can be pre-configured, such as a 5G Femto bit value of 1 indicates that the UE supports 5G Femto, and a 5G Femto bit value of 0 indicates that the UE does not support 5G Femto; or, a 5G Femto bit value of 1 indicates that the UE does not support 5G Femto, and a 5G Femto bit value of 0 indicates that the UE supports 5G Femto.

[0282] Optionally, for the first capability indication, CAG and / or Ex-CAG each occupy one bit in the 5GMM capability IE. If the UE supports 5G Femto, the UE needs to support CAG or Ex-CAG.

[0283] Optionally, for the second capability indication, CSG can be a bit in the S1UE network capability IE, and the bit value of CSG can be pre-configured, such as the bit value of CSG is 1, indicating that the UE supports CSG capability, and the bit value of CSG is 0, indicating that the UE does not support CSG capability; or, the bit value of CSG is 1, indicating that the UE does not support CSG capability, and the bit value of CSG is 0, indicating that the UE supports CSG capability.

[0284] It should be noted that if the UE supports 5G Femto, it is assumed that the UE supports CSG, and the above-mentioned second capability indication is not required.

[0285] S802: AMF sends a request to UDM, where the request carries a UE capability indication and is used to request the UE's subscription data.

[0286] S803, UDM sends the UE's subscription data to AMF.

[0287] Optionally, the UDM determines the UE's subscription data based on the UE's subscription information and UE capability indication.

[0288] Here, the subscription information is used to indicate whether the UE is allowed to use 5G Femto.

[0289] Optionally, when the UE's subscription information indicates that the UE is allowed to use 5G Femto, the UE's subscription data is determined based on the UE capability indication, wherein the subscription data includes a CAG-CSG mapping rule (CAG-CSG mapping rule), and the CAG-CSG mapping rule includes a mapping relationship between an allowed CAG ID and a CSG ID.

[0290] Optionally, when the UE's subscription information indicates that the UE is allowed to use 5G Femto, if the UE supports 5G Femto (or +CSG) and the UE supports CAG or Ex-CAG, the subscription data includes a CAG information list (CAG information list) or an extended CAG information list (Extended CAG information list), and a CAG-CSG mapping rule.

[0291] Optionally, when the UE's subscription information indicates that the UE is allowed to use 5G Femto, if the UE supports 5G Femto (or +CSG) and the UE supports CAG and Ex-CAG, the subscription data includes Extended CAG information list and CAG-CSG mapping rule.

[0292] It should be noted that the UE can assume that the mapped CAG and CSG belong to the same network, and the UE does not need to re-register (4G->5G) or attach (5G->4G). The CAG-CSG mapping rule can be part of the Extended CAG information list. If the UE does not support Ex-CAG, the CAG-CSG mapping rule can be a separate information element. Considering backward compatibility, the CAG-CSG mapping rule is not part of the CAG information list.

[0293] S804. The UE receives a registration accept message sent by the AMF, where the registration accept message includes subscription data.

[0294] In one implementation, if the CAG-CSG mapping rule is part of the Extended CAG information list, encoding methods for the Extended CAG information list and the CAG-CSG mapping rule are as shown in Tables 1 to 6.

[0295] With respect to Table 1, the Extended CAG information list includes the length of the extended CAG information list contents and n entries, where n is an integer greater than or equal to 0.

[0296] Table 1

[0297] It should be noted that the bits involved in the upper column of Table 1 represent 8 bits corresponding to different bytes, and the eight bytes involved in the right column, such as a, b, g, and h, are used to indicate the byte in which each field is located and / or the number of bytes occupied by each field. For example, the number of bytes occupied by this field in entry 1 is a*-4*+1, where a, b, g, and h are integers greater than or equal to 1.

[0298] Furthermore, for each Entry in Table 1, as shown in Table 2, the information contained in each Entry includes the PLMN information under the Entry indicated by MNC+MCC, the length of the CAG-ID without additional information list (Length of CAG-ID without additional information list), the m CAG-IDs that can access the PLMN, and the CAG-ID additional information list (corresponding to the above-mentioned CAG additional information list), where m is an integer greater than or equal to 0.

[0299] Table 2

[0300] It should be noted that the fields involved in Table 2 have a sequence. For example, the CAG-ID1 field among the m CAG-IDs that can access the PLMN is located after the last field of the multiple fields included in the length of the CAG-ID without additional information list field. The CAG-ID additional information list field is located after the CAG-ID m field among the m CAG-IDs.

[0301] It should also be noted that the bits involved in the upper column of Table 2 represent 8 bits corresponding to different bytes, and the eight bytes involved in the right column, such as q, r, m, t, and u, are used to indicate the byte in which each field is located, and / or the number of bytes occupied by each field. For example, the number of bytes occupied by the PLMN information indicated by MNC+MCC is 3 (q+4-(q+1)=3), and the number of bytes occupied by the CAG-ID additional information list is u*-t*+1.

[0302] Furthermore, since the CAG-CSG mapping rule is in the CAG-ID additional information list in the Extended CAG information list, for the CAG-ID additional information list in Table 2, as shown in Table 3, the CAG-ID additional information list includes: o CAG-ID additional information.

[0303] Table 3

[0304] It should be noted that the bits involved in the upper column of Table 3 represent 8 bits corresponding to different bytes, and the eight bytes involved in the right column, such as t, v, w, x, and u, are used to indicate the byte number of each field and / or the number of bytes occupied by each field. For example, the number of bytes occupied by CAG-ID with additional information 2 is w*-(v+1)*+1.

[0305] Furthermore, for each CAG-ID with additional information in Table 3, as shown in Table 4, the information contained in each CAG-ID with additional information includes the length of the CAG-ID additional information content (Length of CAG-ID with additional information contents), CAG-ID, time validity information (Time validity information), first indication information (Mapped CSG list indicator) used to indicate whether there is a mapped CSG list for the CAG-ID, and / or a mapped CSG ID list (Mapped CSG ID list (corresponding to the above-mentioned first list)).

[0306] Table 4

[0307] It can be understood that the Mapped CSG list indicator is a bit in the Length of CAG-ID with additional information contents. The bit value of the Mapped CSG list indicator can be pre-configured. For example, a bit value of 1 for the Mapped CSG list indicator indicates the existence of a Mapped CSG ID list, and a bit value of 0 for the Mapped CSG list indicator indicates the absence of a Mapped CSG ID list. Alternatively, a bit value of 1 for the Mapped CSG list indicator indicates the absence of a Mapped CSG ID list for the UE, and a bit value of 0 for the Mapped CSG list indicator indicates the presence of a Mapped CSG ID list for the UE.

[0308] Optionally, the CAG ID corresponding to the Mapped CSG ID list is the CAG ID in Table 4. The Mapped CSG ID list and the corresponding CAG may belong to the same PLMN. Of course, the Mapped CSG ID list and the corresponding CAG may also belong to different PLMNs.

[0309] It can be understood that if the Mapped CSG ID list and the corresponding CAG can belong to the same PLMN, that is, both belong to the PLMN ID indicated by MNC+MCC in Table 2, then, for the Mapped CSG ID list in Table 4, as shown in Table 5, the Mapped CSG ID list contains information including: the length of the mapped CSG ID list contents / the number of CSG IDs (Length of mapped CSG ID list contents / Number of CSG IDs), and n CSG-IDs that have a mapping relationship with the CAG.

[0310] It should be noted that the CSG ID is only 27 bits, which is not an integer multiple of 8. Therefore, a CSG ID in Table 5 requires 4 bytes (32 bits), and unused bits are represented by 0.

[0311] Table 5

[0312] It is also understandable that if the Mapped CSG ID list and the corresponding CAG may belong to different PLMNs, that is, the CAG belongs to the PLMN ID indicated by MNC+MCC in Table 2, then for the Mapped CSG ID list in Table 4, the information contained in the Mapped CSG ID list includes: the length of the mapped CSG ID list contents / the number of CSG IDs (Length of mapped CSG ID list contents / Number of CSG IDs), the n CSG-IDs that have a mapping relationship with the CAG, and the PLMN ID corresponding to each CSG-ID.

[0313] Optionally, if the PLMN ID corresponding to each of the n CSG-IDs is different from the PLMN ID corresponding to the CAG, but the PLMN IDs corresponding to the n CSG-IDs are the same, as shown in Table 6, PLMN information used to characterize the PLMN ID is added before the first CSG-ID.

[0314] Table 6

[0315] It should be noted that if the PLMN ID corresponding to each of the n CSG-IDs is different from the PLMN ID corresponding to the CAG, but the PLMN IDs corresponding to the n CSG-IDs are at least partially different, then the PLMN information used to characterize the PLMN ID is added before the CSG-ID that is different from the PLMN ID corresponding to the CAG, and there is no need to add PLMN information before the CSG-ID that is the same as the PLMN ID corresponding to the CAG.

[0316] In another implementation manner, if the CAG-CSG mapping rule is a separately configured information element IE, the encoding manner of the CAG-CSG mapping rule is as shown in Table 7, Table 9, Table 11, and Table 12, or Table 8, Table 10 to Table 12.

[0317] Optionally, the information element of the CAG-CSG mapping rule may include: the length of the CAG-CSG mapping rule content and o CAG-CSG mapping rules, as shown in Table 7.

[0318] Optionally, the information element of the CAG-CSG mapping rule may further include: the length of the CAG-CSG mapping rule content, o CAG-CSG mapping rules, and PLMN information corresponding to the CAG-CSG mapping rule, as shown in Table 8.

[0319] Table 7

[0320] Table 8

[0321] It should be noted that the bits involved in the upper column in Table 7 and Table 8 represent 8 bits corresponding to different bytes, and the octets involved in the right column, such as t, v, w, x, and u, are used to indicate the byte number of each field and / or the number of bytes occupied by each field. For example, the number of bytes occupied by CAG-CSG mapping rule 2 is w*-(v+1)*+1.

[0322] It should also be noted that, with respect to Table 8, the PLMN IDs corresponding to the CAGs in each CAG-CSG mapping rule in o CAG-CSG mapping rules may be completely identical or may not be completely identical.

[0323] In one example, if the PLMN IDs corresponding to the CAGs in each CAG-CSG mapping rule are exactly the same, it is only necessary to add PLMN information for representing the PLMN ID before the first CAG-CSG mapping rule.

[0324] In another example, if the PLMN IDs corresponding to the CAGs in each CAG-CSG mapping rule are completely different, the corresponding PLMN information for representing the PLMN ID is added before each CAG-CSG mapping rule.

[0325] In another example, if the PLMN IDs corresponding to the CAGs in each CAG-CSG mapping rule are at least partially identical, PLMN information representing the PLMN ID is added before the CAG-CSG mapping rule corresponding to the same PLMN ID; and PLMN information representing the PLMN ID corresponding to each of the remaining completely different CAG-CSG mapping rules is added before each of the remaining completely different CAG-CSG mapping rules.

[0326] Furthermore, for each CAG-CSG mapping rule in Table 7, as shown in Table 9, the information included in each CAG-CSG mapping rule includes the length of the CAG-CSG mapping rule content (Length of CAG-CSG mapping rule contents), PLMN information corresponding to the CAG, CAG-ID, time validity information (Time validity information), first indication information (Mapped CSG list indicator) used to indicate whether there is a mapped CSG list for the CAG-ID, and / or a mapped CSG ID list (Mapped CSG ID list (corresponding to the above-mentioned first list)).

[0327] Table 9

[0328] Furthermore, for each CAG-CSG mapping rule in Table 8, as shown in Table 10, the information included in each CAG-CSG mapping rule includes the length of the CAG-CSG mapping rule content, CAG-ID, time validity information, first indication information for indicating whether there is a mapped CSG list for the CAG-ID, and / or a mapped CSG ID list.

[0329] Table 10

[0330] It can be understood that the Mapped CSG list indicator is a bit in the Length of CAG-CSG mapping rule contents. The bit value of the Mapped CSG list indicator can be pre-configured. For example, the bit value of the Mapped CSG list indicator is 1, indicating that a Mapped CSG ID list exists, and the bit value of the Mapped CSG list indicator is 0, indicating that a Mapped CSG ID list does not exist; or the bit value of the Mapped CSG list indicator is 1, indicating that the UE does not have a Mapped CSG ID list, and the bit value of the Mapped CSG list indicator is 0, indicating that the UE has a Mapped CSG ID list.

[0331] Optionally, the CAG ID corresponding to the Mapped CSG ID list is the CAG ID in Table 9 or Table 10. The Mapped CSG ID list and the corresponding CAG may belong to the same PLMN. Of course, the Mapped CSG ID list and the corresponding CAG may also belong to different PLMNs.

[0332] It can be understood that if the Mapped CSG ID list and the corresponding CAG may belong to the same PLMN, that is, both belong to the PLMN ID indicated by MNC+MCC in Table 8 or Table 9. Then, for the Mapped CSG ID list in Table 9 or Table 10, as shown in Table 11, the Mapped CSG ID list includes: the length of the mapped CSG ID list contents / the number of CSG IDs (Length of mapped CSG ID list contents / Number of CSG IDs), and n CSG-IDs having a mapping relationship with the CAG.

[0333] It should be noted that the CSG ID is only 27 bits, which is not an integer multiple of 8. Therefore, a CSG ID in Table 11 requires 4 bytes (32 bits), and unused bits are represented by 0.

[0334] Table 11

[0335] It is also understandable that if the Mapped CSG ID list and the corresponding CAG may belong to different PLMNs, that is, the CAG belongs to the PLMN ID indicated by MNC+MCC in Table 8 or Table 9, then for the Mapped CSG ID list in Table 9 or Table 10, the information contained in the Mapped CSG ID list includes: the length of the mapped CSG ID list contents / the number of CSG IDs (Length of mapped CSG ID list contents / Number of CSG IDs), the n CSG-IDs that have a mapping relationship with the CAG, and the PLMN ID corresponding to each CSG-ID.

[0336] Optionally, if the PLMN ID corresponding to each of the n CSG-IDs is different from the PLMN ID corresponding to the CAG, but the PLMN IDs corresponding to the n CSG-IDs are the same, as shown in Table 12, PLMN information used to characterize the PLMN ID is added before the first CSG-ID.

[0337] Table 12

[0338] It should be noted that if the PLMN ID corresponding to each of the n CSG-IDs is different from the PLMN ID corresponding to the CAG, but the PLMN IDs corresponding to the n CSG-IDs are at least partially different, then the PLMN information used to characterize the PLMN ID is added before the CSG-ID that is different from the PLMN ID corresponding to the CAG, and there is no need to add PLMN information before the CSG-ID that is the same as the PLMN ID corresponding to the CAG to avoid waste of resources.

[0339] S805: The UE determines a second cell having a mapping relationship with the first cell based on a CAG-CSG mapping rule.

[0340] The first cell is one of the CAG cell and the CSG cell, and the second cell is the other of the CAG cell and the CSG cell.

[0341] Optionally, after the UE receives the CAG-CSG mapping rules, the CAG-CSG mapping rules may be stored in a non-volatile memory. Of course, the CAG-CSG mapping rules may also be stored in the USIM, to which this application does not impose any specific limitation.

[0342] The UE's NAS layer sends the CAG-CSG mapping rules to the access layer. After the access layer receives them, when the UE leaves the current CAG cell or CSG cell, the UE can select a CSG cell that has a mapping relationship with the current CAG cell (or the CAG cell corresponding to the current CSG cell) based on the CAG-CSG mapping rules. After the UE moves to the mapped CSG cell or CAG cell, the UE does not need to reselect for initial registration, but instead initiates mobility registration or TAU. The network side uses the CAG-CSG mapping rules to check whether there is a mapping relationship. If so, it is accepted; otherwise, it is rejected. In this way, after the terminal device leaves the CAG cell (or CSG cell), during the cell reselection process, the terminal device only needs to automatically search for the CSG cell (or CAG cell) that has a mapping relationship with the CAG cell (or CSG cell). If a CSG cell (or CAG cell) with a mapping relationship is searched, the terminal device can access the allowed CSG cell (or CAG cell). In this way, the speed of cell reselection of the terminal device is greatly improved, and the system resources are saved. At the same time, it also ensures that the terminal device can successfully select the allowed CAG cell or CSG cell to ensure service continuity.

[0343] Optionally, if the UE cannot search for a mapped CSG cell or CAG cell when leaving the current CAG cell or CSG cell, the UE selects a common cell under the same or equivalent PLMN that does not support CSG or CAG. The UE does not need to reselect for initial registration, but instead initiates a mobility registration or TAU based on a common cell under the same or equivalent PLMN. In this way, by selecting a common cell under the same or equivalent PLMN that does not support CSG or CAG, the UE greatly improves the speed of cell reselection of the terminal device, ensures the success of subsequent processes, and ensures service continuity.

[0344] Of course, if the UE still cannot search for a common cell that does not support CSG or CAG under the same PLMN, the UE reselects a network and re-initiates initial registration with the network device.

[0345] Example 2

[0346] The CAG-CSG mapping rule may be determined by the UE, and the UE determines the CAG-CSG mapping rule based on the allowed CAG information list and the allowed CSG information list.

[0347] Optionally, after obtaining the allowed CAG information list and the allowed CSG information list, the terminal device may compare, based on the allowed CAG information list and the allowed CSG information list, the PLMN information corresponding to each CAG cell in the one or more CAG cells included in the allowed CAG information list with the PLMN information corresponding to each CSG cell in the one or more CSG cells included in the allowed CSG information list. If the PLMN information corresponding to the CAG cell is the same as or equivalent to the PLMN information corresponding to the CSG cell, the UE determines that the CSG cell and the CAG cell under the same PLMN or equivalent PLMN are both accessible. Then, a mapping relationship is established between the CSG cell and the CAG cell under the same PLMN or equivalent PLMN to obtain a CAG-CSG mapping rule. In this way, when the UE moves from a CSG cell to a CAG cell that has a mapping relationship with the CSG cell, the UE can successfully select the allowed CAG cell or CSG cell, ensuring the success of subsequent processes and ensuring service continuity.

[0348] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, the technical solution of the present application can be subjected to a variety of simple modifications, and these simple modifications all fall within the scope of protection of the present application. For example, the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will no longer describe the various possible combinations separately. For another example, the various different embodiments of the present application can also be arbitrarily combined, as long as they do not violate the idea of ​​the present application, they should also be regarded as the contents disclosed in the present application. For another example, under the premise of no conflict, the various embodiments and / or the technical features in each embodiment described in the present application can be arbitrarily combined with the prior art, and the technical solution obtained after the combination should also fall within the scope of protection of the present application.

[0349] It should also be understood that in the various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not imply a precedence in 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. In addition, in the embodiments of the present application, the terms "downlink," "uplink," and "sidelink" are used to indicate the transmission direction of signals or data, where "downlink" is used to indicate the first direction of transmission of signals or data from a site to a user equipment in a cell, "uplink" is used to indicate the second direction of transmission of signals or data from a user equipment in a cell to a site, and "sidelink" is used to indicate the third direction of transmission of signals or data from user equipment 1 to user equipment 2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. Specifically, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0350] FIG9 is a schematic diagram of the structure of a cell determination device 900 provided in an embodiment of the present application, which is applied to a terminal device. As shown in FIG9 , the cell determination device 900 includes:

[0351] The first determination unit 901 is configured to determine a second cell having a mapping relationship with the first cell based on a first mapping relationship; wherein the first mapping relationship is a mapping relationship between a closed access group CAG cell and a closed subscription group CSG cell; the first cell is one of the CAG cell and the CSG cell, and the second cell is the other of the CAG cell and the CSG cell.

[0352] FIG10 is a schematic diagram of the structure of a cell determination apparatus 1000 provided in an embodiment of the present application, which is applied to a network device. As shown in FIG10 , the cell determination apparatus 1000 includes:

[0353] The first sending unit 1001 is configured to send a registration acceptance message or a configuration update command message; wherein the registration acceptance message or the configuration update command message is used to indicate a first mapping relationship, the first mapping relationship is a mapping relationship between a closed access group CAG cell and a closed subscription group CSG cell, the first mapping relationship is used by the terminal device to determine a second cell corresponding to the first cell, the first cell is one of the CAG cell and the CSG cell, and the second cell is the other of the CAG cell and the CSG cell.

[0354] Figure 11 is a schematic diagram of a communication device 1100 provided in an embodiment of the present application. The communication device can be a terminal device or a network device. The communication device 1100 shown in Figure 11 includes a processor 1110, which can call and execute a computer program from a memory to implement the method in the embodiment of the present application.

[0355] Optionally, as shown in FIG11 , the communication device 1100 may further include a memory 1120. The processor 1110 may call and execute a computer program from the memory 1120 to implement the method in the embodiment of the present application.

[0356] The memory 1120 may be a separate device independent of the processor 1110 , or may be integrated into the processor 1110 .

[0357] Optionally, as shown in FIG11 , the communication device 1100 may further include a transceiver 1130 , and the processor 1110 may control the transceiver 1130 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0358] The transceiver 1130 may include a transmitter and a receiver. The transceiver 1130 may further include an antenna, and the number of antennas may be one or more.

[0359] Optionally, the communication device 1100 may specifically be a terminal device of an embodiment of the present application, and the communication device 1100 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0360] Optionally, the communication device 1100 may specifically be a network device in an embodiment of the present application, and the communication device 1100 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0361] Figure 12 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 1200 shown in Figure 12 includes a processor 1210, which can call and run a computer program from a memory to implement the method according to the embodiment of the present application.

[0362] Optionally, as shown in FIG12 , the chip 1200 may further include a memory 1220. The processor 1210 may call and execute a computer program from the memory 1220 to implement the method in the embodiment of the present application.

[0363] The memory 1220 may be a separate device independent of the processor 1210 , or may be integrated into the processor 1210 .

[0364] Optionally, the chip 1200 may further include an input interface 1230. The processor 1210 may control the input interface 1230 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0365] Optionally, the chip 1200 may further include an output interface 1240. The processor 1210 may control the output interface 1240 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0366] Optionally, the chip can be applied to the terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0367] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0368] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0369] An embodiment of the present application further provides a computer storage medium, which stores one or more programs. The one or more programs can be executed by one or more processors to implement the method in the embodiment of the present application.

[0370] FIG13 is a schematic block diagram of a communication system 1300 provided in an embodiment of the present application. As shown in FIG13 , the communication system 1300 includes a terminal device 1310 and a network device 1320 .

[0371] Among them, the terminal device 1310 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1320 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they will not be repeated here.

[0372] It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by hardware integrated logic circuits in the processor or software instructions. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0373] It is understood that the memory 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 memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0374] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0375] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0376] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0377] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0378] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0379] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0380] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0381] The embodiment of the present application also provides a computer program.

[0382] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not described here.

[0383] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0384] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0385] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0386] 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.

[0387] 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.

[0388] 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.

[0389] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0390] 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 the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A cell determination method, the method comprising: The terminal device determines a second cell having a mapping relationship with a first cell based on a first mapping relationship; wherein, the first mapping relationship is a mapping relationship between a Closed Access Group (CAG) cell and a Closed Subscriber Group (CSG) cell; the first cell is one of the CAG cell and the CSG cell, and the second cell is the other of the CAG cell and the CSG cell.

2. The method according to claim 1, wherein The first mapping relationship is configured by the network device for the terminal device, or determined by the terminal device, or stored in the user identity module of the terminal device.

3. The method according to claim 1 or 2, wherein, If the first mapping relationship is configured by the network device for the terminal device, the method further comprises: The terminal device receives a registration acceptance message or a configuration update command message sent by the network device; wherein, the registration acceptance message or the configuration update command message is used to indicate the first mapping relationship.

4. The method according to claim 3, wherein The registration acceptance message or the configuration update command message is used to indicate a first mapping rule or a second mapping rule, the first mapping rule or the second mapping rule is used to determine the first mapping relationship, the first mapping rule is used to indicate the mapping from the CAG cell to the CSG cell, and the second mapping rule is used to indicate the mapping from the CSG cell to the CAG cell.

5. The method according to claim 4, wherein, The first mapping rule is included in the extended CAG information list; or, the first mapping rule and the extended CAG information list are different information elements.

6. The method according to claim 5, wherein, If the first mapping rule is included in the extended CAG information list, the first mapping rule is included in the CAG additional information list of the extended CAG information list.

7. The method according to claim 5 or 6, wherein The extended CAG information list further includes Public Land Mobile Network (PLMN) information.

8. The method according to any one of claims 4 to 7, wherein The first mapping rule includes: first information corresponding to each CAG cell in one or more CAG cells, and the first information is used to indicate the CSG cell mapped by the CAG cell.

9. The method according to claim 8, wherein, The first information includes one or more of the following information: The cell identifier of the CAG cell; The PLMN information corresponding to the CAG cell; First indication information; the first indication information is used to indicate whether there is a CSG cell mapped by the CAG cell; A first list; The first list is used to indicate one or more CSG cells mapped by the CAG cell.

10. The method according to claim 9, wherein, The first list includes: the cell identifiers of each CSG cell in one or more CSG cells, or the cell identifiers of each CSG cell in one or more CSG cells and the PLMN information corresponding to each CSG cell.

11. The method according to claim 4, wherein, The second mapping rule is included in the extended CSG information list; or, the second mapping rule and the extended CSG information list are different information elements.

12. The method according to any one of claims 3 to 11, wherein, The method further comprises: The terminal device sends a registration request message to the network device; wherein, the registration request message carries capability indication information, and the capability indication information is used to indicate the CAG capability information and / or CSG capability information of the terminal device.

13. The method according to claim 12, wherein, The capability indication information includes one or more of the following: First capability indication information, where the first capability indication information is used to indicate whether the terminal device supports CAG and / or extended CAG; Second capability indication information, where the second capability indication information is used to indicate whether the terminal device supports CSG; Third capability indication information, where the third capability indication information is used to indicate whether the terminal device supports a home base station.

14. The method according to claim 13, wherein When the subscription information of the terminal device indicates that the terminal device is allowed to use a 5G home base station, and the terminal device supports the CAG and / or the extended CAG, the subscription data of the terminal device includes a CAG information list and / or an extended CAG information list, and a first mapping rule.

15. The method according to claim 1 or 2, wherein The first mapping relationship is determined by the terminal device, and the method further includes: The terminal device determines a first mapping rule or a second mapping rule based on the CAG information list and the CSG information list, where the first mapping rule or the second mapping rule is used to determine the first mapping relationship.

16. The method according to claim 15, wherein, The terminal device determining a first mapping rule or a second mapping rule based on the CAG identifier list and the CSG identifier list includes: The terminal device maps CAG cells and CSG cells that meet a preset condition based on the CAG information list and the CSG information list, and determines the first mapping rule or the second mapping rule; Wherein, the CAG information list includes PLMN information corresponding to each CAG cell in one or more CAG cells, the CSG information list includes PLMN information corresponding to each CSG cell in one or more CSG cells, and the preset condition includes that the PLMN information corresponding to the CAG cell and the PLMN information corresponding to the CSG cell are the same or equivalent.

17. The method according to any one of claims 4 to 16, wherein Before the terminal device determines a second cell having a mapping relationship with the first cell based on the first mapping relationship, it includes: The non-access stratum NAS of the terminal device sends the first mapping rule or the second mapping rule to the access stratum; The access stratum of the terminal device determines the first mapping relationship based on the first mapping rule or the second mapping rule.

18. The method according to any one of claims 1 to 17, the method further includes: The terminal device performs mobility registration or tracking area update based on the second cell.

19. The method according to any one of claims 1 to 18, wherein The method further includes: When the terminal device fails to determine the second cell, the terminal device selects a third cell, the third cell belongs to the same or equivalent PLMN as the first cell, and the third cell does not support CSG and / or CAG, and the terminal device performs mobility registration or tracking area update based on the third cell.

20. The method according to any one of claims 1 to 18, wherein The method further includes: When the terminal device fails to determine the second cell and the third cell, the terminal device reselects a network and re-initiates an initial registration to the network device; wherein, the third cell belongs to the same or equivalent PLMN as the first cell, and the third cell does not support CSG and / or CAG.

21. A cell determination method, the method includes: The network device sends a registration acceptance message or a configuration update command message to the terminal device; wherein, the registration acceptance message or the configuration update command message is used to indicate a first mapping relationship, and the first mapping relationship is a mapping relationship between a Closed Access Group (CAG) cell and a Closed Subscriber Group (CSG) cell, and the first mapping relationship is used for the terminal device to determine a second cell corresponding to a first cell, where the first cell is one of the CAG cell and the CSG cell, and the second cell is the other of the CAG cell and the CSG cell.

22. The method according to claim 21, wherein, The registration acceptance message or the configuration update command message is used to indicate a first mapping rule or a second mapping rule, and the first mapping rule or the second mapping rule is used to determine the first mapping relationship. The first mapping rule is used to indicate the mapping from the CAG cell to the CSG cell, and the second mapping rule is used to indicate the mapping from the CSG cell to the CAG cell.

23. The method according to claim 22, wherein The network device is a 5G core network device, and the first mapping rule is included in the extended CAG information list; or, the first mapping rule and the extended CAG information list are different information elements.

24. The method according to claim 23, wherein, If the first mapping rule is included in the extended CAG information list, the first mapping rule is included in the CAG additional information list of the extended CAG information list.

25. The method according to claim 23 or 24, wherein The extended CAG information list further includes Public Land Mobile Network (PLMN) information.

26. The method according to any one of claims 22 to 25, wherein, The first mapping rule includes: first information corresponding to each CAG cell in one or more CAG cells, and the first information is used to indicate the CSG cell mapped by the CAG cell.

27. The method according to claim 26, wherein, The first information includes the following multiple: The cell identifier of the CAG cell; The PLMN information corresponding to the CAG cell; First indication information; The first indication information is used to indicate whether there is a CSG cell mapped by the CAG cell; First list; The first list is used to indicate one or more CSG cells mapped by the CAG cell.

28. The method according to claim 27, wherein The first list includes: the cell identifier of each CSG cell in one or more CSG cells, or the cell identifier of each CSG cell in one or more CSG cells and the PLMN information corresponding to each CSG cell.

29. The method according to claim 22, wherein The network device is a 4G core network device, and the second mapping rule is included in the extended CSG information list; or, the second mapping rule and the extended CSG information list are different information elements.

30. The method according to any one of claims 21 to 29, wherein The method further includes: The network device receives a registration request message sent by the terminal device; wherein, the registration request message carries the capability indication information of the terminal device, and the capability indication information is used to indicate the CAG capability information and / or CSG capability information of the terminal device.

31. The method according to claim 30, wherein, The capability indication information includes one or more of the following: First capability indication information, and the first capability indication information is used to indicate whether the terminal device supports CAG and / or extended CAG; Second capability indication information, and the second capability indication information is used to indicate whether the terminal device supports CSG; Third capability indication information, where the third capability indication information is used to indicate whether the terminal device supports a home base station.

32. The method according to claim 31, wherein, When the subscription information of the terminal device indicates that the terminal device is allowed to use the 5G home base station, and the terminal device supports the CAG capability and / or the extended CAG capability, the subscription data of the terminal device includes a CAG information list and / or an extended CAG information list, and a first mapping rule.

33. A cell determination device, applied to a terminal device, the device comprising: A first determination unit, configured to determine a second cell having a mapping relationship with a first cell based on a first mapping relationship; wherein, the first mapping relationship is a mapping relationship between a Closed Access Group (CAG) cell and a Closed Subscriber Group (CSG) cell; the first cell is one of the CAG cell and the CSG cell, and the second cell is the other of the CAG cell and the CSG cell.

34. A cell determination device, applied to a network device, the device comprising: A first sending unit, configured to send a registration acceptance message or a configuration update command message; wherein, the registration acceptance message or the configuration update command message is used to indicate a first mapping relationship, the first mapping relationship is a mapping relationship between a Closed Access Group (CAG) cell and a Closed Subscriber Group (CSG) cell, the first mapping relationship is used for a terminal device to determine a second cell corresponding to a first cell, the first cell is one of the CAG cell and the CSG cell, and the second cell is the other of the CAG cell and the CSG cell.

35. A communication device, the communication device comprising: A memory, for storing a computer program; A processor, connected to the memory, for calling and running the computer program from the memory, to implement the method according to any one of claims 1 to 20, or, to implement the method according to any one of claims 21 to 32.

36. A chip, comprising: A processor; The processor is used to call and run a computer program from a memory, so that the device installed with the chip executes the method according to any one of claims 1 to 20, or, executes the method according to any one of claims 21 to 32.

37. A computer-readable storage medium, for storing a computer program, the computer program, when executed by a processor, implements the method according to any one of claims 1 to 20, or, when executed by a processor, implements the method according to any one of claims 21 to 32.

38. A computer program product, comprising computer program instructions, the computer program instructions, when executed by a processor, implement the method according to any one of claims 1 to 20, or, when executed by a processor, implement the method according to any one of claims 21 to 32.

Images