Method and device for accessing mobile terminal to network, electronic equipment and storage medium

Abstract

The invention relates to a network access method and device for a mobile terminal, electronic equipment and a storage medium, and the method comprises the steps: receiving a registration request sent by a base station, the registration request carrying the identification information of the base station; in response to the registration request, performing slice negotiation with a network slice selection function NSSF network element, and determining whether to redirect to a second access and mobility management function AMF network element for network access registration according to a negotiation result; and determining the type of the base station based on the identification information of the base station and sending the type of the base station to a second access and mobility management function AMF network element when it is determined that the base station needs to be redirected to the second access and mobility management function AMF network element for network access registration, and enabling the second access and mobility management function AMF network element to perform network access registration on the mobile terminal based on the type of the base station. Therefore, the signaling interaction times can be reduced, and the network access efficiency of the mobile terminal is improved.

Description

Technical Field

[0001] The present application relates to the field of mobile communication technology, and in particular to a method, device, electronic device and storage medium for a mobile terminal to access a network. Background Art

[0002] In daily life, mobile terminals usually access public networks such as the Public Land Mobile Network (PLMN) for mobile communications. However, with the development of technologies such as big data, cloud computing, and the Internet of Things, vertical industries have increasingly higher requirements for network transmission speed, latency, and security. In particular, in the face of specific industrial scenarios, general public networks can no longer meet the needs of enterprises for high speed, high reliability, and high stability. Therefore, non-public networks (NPN) came into being.

[0003] In the prior art, during the process of a mobile terminal accessing the network, the target access and mobility management function AMF network element needs to perform an N2 release on the mobile terminal, and then obtain base station information from the service request to decide the type of network the mobile terminal accesses. Therefore, the signaling interaction of the existing mobile terminal access network method is relatively complex, resulting in low efficiency in accessing the network. Summary of the invention

[0004] The present application provides a method, device, electronic device and storage medium for a mobile terminal to access a network, so as to solve the technical problem that the signaling interaction of the existing mobile terminal accessing the network is relatively complex, resulting in low efficiency of accessing the network.

[0005] In a first aspect, an embodiment of the present application provides a method for a mobile terminal to access a network, which is applied to a first access and mobility management function AMF network element, and the method includes:

[0006] receiving a registration request sent by a base station, wherein the registration request is used to request the first access and mobility management function AMF network element to register the mobile terminal for network access, and the registration request carries identification information of the base station;

[0007] In response to the registration request, perform slice negotiation with the network slice selection function NSSF network element, and determine whether it is necessary to redirect to the second access and mobility management function AMF network element for network registration according to the negotiation result;

[0008] When it is determined that redirection to the second access and mobility management function AMF network element is required for network registration, the type of the base station is determined based on the identification information of the base station, and the type of the base station is sent to the second access and mobility management function AMF network element, so that the second access and mobility management function AMF network element registers the mobile terminal for network registration based on the type of the base station.

[0009] Optionally, the determining the type of the base station based on the identification information of the base station includes:

[0010] Parsing the identification information of the base station;

[0011] In a case where the identification information of the base station includes a closed access group identifier, determining that the type of the base station is a first base station type, wherein the first base station type refers to a base station type that accesses the mobile terminal to a non-public network;

[0012] When the closed access group identifier is not included in the identification information of the base station, the type of the base station is determined to be a second base station type, wherein the second base station type refers to a base station type that accesses the mobile terminal to a public network.

[0013] Optionally, in response to the registration request, performing slice negotiation with a network slice selection function NSSF network element, and determining whether it is necessary to redirect to a second access and mobility management function AMF network element for network registration according to the negotiation result, including:

[0014] In response to the registration request, obtaining the slice capability of the mobile terminal from the network slice selection function NSSF network element;

[0015] Determining whether the mobile terminal supports the slicing capability of the mobile terminal;

[0016] When it is determined that the mobile terminal itself does not support the slicing capability of the mobile terminal, it is determined that it is necessary to redirect to the second access and mobility management function AMF network element for network registration;

[0017] When it is determined that the mobile terminal supports the slicing capability, it is determined that there is no need to redirect to the second access and mobility management function AMF network element for network registration.

[0018] In a second aspect, an embodiment of the present application further provides a method for a mobile terminal to access a network, which is applied to a second access and mobility management function AMF network element, and the method includes:

[0019] receiving the type of the base station sent by the first access and mobility function AMF network element, wherein the type of the base station is determined by the first access and mobility function AMF network element based on the identification information of the base station when it is determined that redirection to the second access and mobility function AMF network element is required for network registration; the identification information of the base station is carried in the registration request sent by the base station;

[0020] Acquiring subscription information of a mobile terminal, wherein the subscription information is used to characterize the ability of the mobile terminal to access a non-public network;

[0021] The mobile terminal is registered for network access based on the type of the base station and the subscription information.

[0022] Optionally, the acquiring the subscription information of the mobile terminal includes:

[0023] Sending a contract information acquisition request to a unified data management (UDM) network element, wherein the contract information acquisition request is used to request to acquire the contract information corresponding to the mobile terminal;

[0024] The subscription information returned by the unified data management (UDM) network element is received, wherein the subscription information is used to characterize that the mobile terminal only accesses a non-public network or that the mobile terminal not only accesses a non-public network.

[0025] Optionally, the registering the mobile terminal with a network based on the type of the base station and the subscription information includes:

[0026] When the type of the base station is a first base station type and the subscription information is used to characterize that the mobile terminal only accesses a non-public network, allowing the mobile terminal to be registered for network access, wherein the first base station type refers to a base station type that accesses the mobile terminal to a non-public network;

[0027] When the type of the base station is the first base station type and the subscription information is used to represent that the mobile terminal not only accesses a non-public network, allowing the mobile terminal to be registered for network access;

[0028] If the type of the base station is a second base station type and the subscription information is used to characterize that the mobile terminal only accesses a non-public network, refusing to register the mobile terminal for network access, wherein the second base station type refers to a base station type that accesses the mobile terminal to a public network;

[0029] When the type of the base station is the second base station type and the subscription information is used to represent that the mobile terminal not only accesses a non-public network, network registration of the mobile terminal is allowed.

[0030] Optionally, the receiving the type of the base station sent by the first access and mobility management function AMF network element includes:

[0031] The type of the base station sent by the first access and mobility management function AMF network element is received through the target interface, wherein the target interface is the interface between the first access and mobility management function AMF network element and the second access and mobility management function AMF network element, and the field corresponding to the type of the base station is a newly added field in the interface message corresponding to the target interface.

[0032] In a third aspect, an embodiment of the present application further provides a device for a mobile terminal to access a network, which is applied to a first access and mobility management function AMF network element, and the device includes:

[0033] A first receiving module is used to receive a registration request sent by a base station, wherein the registration request is used to request the first access and mobility management function AMF network element to register the mobile terminal for network access, and the registration request carries identification information of the base station;

[0034] A slice negotiation module, configured to perform slice negotiation with a network slice selection function NSSF network element in response to the registration request, and determine whether it is necessary to redirect to a second access and mobility management function AMF network element for network registration according to the negotiation result;

[0035] A sending module is used to determine the type of the base station based on the identification information of the base station when it is determined that redirection to the second access and mobility management function AMF network element is required for network registration, and send the type of the base station to the second access and mobility management function AMF network element, so that the second access and mobility management function AMF network element registers the mobile terminal for network registration based on the type of the base station.

[0036] In a fourth aspect, an embodiment of the present application further provides a device for a mobile terminal to access a network, which is applied to a second access and mobility management function AMF network element, and the device includes:

[0037] A second receiving module is used to receive the type of the base station sent by the first access and mobility management function AMF network element, wherein the type of the base station is determined by the first access and mobility management function AMF network element based on the identification information of the base station when it is determined that it needs to be redirected to the second access and mobility management function AMF network element for network registration; the identification information of the base station is carried in the registration request sent by the base station;

[0038] An acquisition module, used to acquire contract information of a mobile terminal, wherein the contract information is used to characterize the ability of the mobile terminal to access a non-public network;

[0039] A network registration module is used to register the mobile terminal for network access based on the type of the base station and the subscription information.

[0040] In a fifth aspect, an embodiment of the present application further provides an electronic device, including a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

[0041] Memory, used to store computer programs;

[0042] The processor is used to implement the steps of the method for a mobile terminal to access a network as described in any one of the first aspects, or to implement the steps of the method for a mobile terminal to access a network as described in any one of the second aspects, when executing the program stored in the memory.

[0043] In a sixth aspect, an embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method for a mobile terminal to access a network as described in any one of the first aspect are implemented, or the steps of the method for a mobile terminal to access a network as described in any one of the second aspect are implemented.

[0044] The above-mentioned technical solution provided by the embodiment of the present application has the following advantages over the prior art: the method provided by the embodiment of the present application, by receiving a registration request sent by a base station, wherein the registration request is used to request the first access and mobility management function AMF network element to register the mobile terminal for network access, and the registration request carries the identification information of the base station; in response to the registration request, performing slice negotiation with the network slice selection function NSSF network element, and determining whether it is necessary to redirect to the second access and mobility management function AMF network element for network access registration according to the negotiation result; when it is determined that it is necessary to redirect to the second access and mobility management function AMF network element for network access registration, determining the type of the base station based on the identification information of the base station, and sending the type of the base station to the second access and mobility management function AMF network element, so that the second access and mobility management function AMF network element registers the mobile terminal for network access based on the type of the base station. Through the above-mentioned method, when the first access and mobility management function AMF network element determines that it needs to redirect to the second access and mobility management function AMF network element for network registration, it can use the identification information of the base station carried in the registration request to determine the type of base station, and send the type of base station to the second access and mobility management function AMF network element. In this way, the second access and mobility management function AMF network element can select a suitable access network for network registration based on the type of base station. Compared with the prior art that requires the second access and mobility management function AMF network element to perform an N2 release on the mobile terminal to obtain base station information from the service request to decide the type of network to which the mobile terminal accesses, the way the mobile terminal accesses the network in the embodiment of the present application reduces the overall number of signaling interactions, thereby improving the efficiency of the mobile terminal accessing the network. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0047] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0048] Figure 1A schematic diagram of a 5G network architecture provided in an embodiment of the present application;

[0049] Figure 2 A flowchart of a method for a mobile terminal to access a network provided in an embodiment of the present application;

[0050] Figure 3 A flowchart of a method for a mobile terminal to access a network provided by the prior art;

[0051] Figure 4 A flowchart of another method for a mobile terminal to access a network provided in an embodiment of the present application;

[0052] Figure 5 A schematic diagram of an interaction process of each network element provided in an embodiment of the present application;

[0053] Figure 6 A schematic diagram of another interaction process of each network element provided in an embodiment of the present application;

[0054] Figure 7 A schematic diagram of another interaction process of each network element provided in an embodiment of the present application;

[0055] Figure 8 A schematic diagram of another interaction process of network elements provided in an embodiment of the present application;

[0056] Fig. 9 A schematic diagram of the structure of a device for a mobile terminal to access a network provided in an embodiment of the present application;

[0057] Fig.10 A schematic diagram of the structure of another device for a mobile terminal to access a network provided in an embodiment of the present application;

[0058] Fig.11 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0060] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0061] Mobile communications have now developed to the fifth generation of mobile communication technology (5G). Compared with previous generations, the main feature of 5G network architecture is that it is based on a service-oriented architecture. Figure 1 As shown in the figure, the functions of each network element are as follows:

[0062] Mobile terminals (User Equipment, referred to as UE) mainly access the 5G network and obtain services through the wireless air interface. The terminals exchange information with base stations through the air interface, and exchange information with the access and mobility management function (Access and Mobility Management function, referred to as AMF) of the core network through non-access stratum signaling (Non-Access Stratum, referred to as NAS).

[0063] The Radio Access Network (RAN) network element is responsible for air interface resource scheduling and air interface connection management for terminals to access the network.

[0064] The access and mobility management function AMF network element is a core network control plane entity, which is mainly responsible for user mobility management, including registration and temporary identity allocation, maintenance of idle (IDLE) and connected (CONNECT) states, and state migration. Switching in the CONNECT state, triggering paging in the user IDLE state, and other functions.

[0065] The Authentication Server Function (AUSF) is a core network control plane entity, which is mainly responsible for user authentication and authorization to ensure that the user is a legitimate user.

[0066] The Unified Data Management (UDM) function is a core network control plane entity belonging to the terminal server and is used to permanently store terminal contract data.

[0067] The session management function (SMF) is a core network control plane entity. It is mainly responsible for maintaining PDU Sessions, allocating user IP addresses, and has quality of service (QoS) control and billing functions, caching downlink data packets received in the user IDLE state and notifying the AMF to page the user.

[0068] The user plane function (UPF) is a user plane functional entity of the core network, responsible for forwarding user data messages and also for collecting statistics on user data messages for billing and other functions.

[0069] Policy Control Functionality (PCF) is a core network control plane entity responsible for access and mobility management policies, UE policies, session management policies and charging rules. This functional entity mainly generates access and mobility management policies, UE routing policies, user data transmission quality of service rules and charging rules based on service information, user subscription information and operator configuration information.

[0070] The Network Exposure Function (NEF) is a core network control plane entity responsible for opening up mobile network capabilities to the outside world.

[0071] The Network Function Repository Function (NRF) is a core network control plane entity responsible for the dynamic registration of service capabilities of network functions and network function discovery.

[0072] The Network Slice Selection Function (NSSF) is a core network control plane entity responsible for selecting the target Network Slice Instance (NSI).

[0073] Application Function (AF for short) is an application entity responsible for providing specific services to users.

[0074] In order to solve the technical problem in the prior art that the signaling interaction of the mobile terminal accessing the network is relatively complex, resulting in low efficiency of the mobile terminal accessing the network, the present application provides a method, device, electronic device and storage medium for mobile terminal accessing the network, which can reduce the overall number of signaling interactions and improve the efficiency of mobile terminal accessing the network.

[0075] See also Figure 2 , Figure 2 A flow chart of a method for a mobile terminal to access a network provided in an embodiment of the present application. Figure 2 As shown, the method for the mobile terminal to access the network is applied to the first access and mobility management function AMF network element, and the method includes:

[0076] Step 201: Receive a registration request sent by a base station, wherein the registration request is used to request a first access and mobility management function AMF network element to register a mobile terminal with the network, and the registration request carries identification information of the base station.

[0077] Specifically, the identification information of the above base station can be used to identify the type of the base station.

[0078] In this step, the mobile terminal can initiate a registration request to the base station. After receiving the registration request, the base station can send the identification information of the base station together with the registration request to the first access and mobility management function AMF network element. In this way, the first access and mobility management function AMF network element can receive the registration request carrying the identification information of the base station.

[0079] Step 202: In response to the registration request, perform slice negotiation with the network slice selection function NSSF network element, and determine whether it is necessary to redirect to the second access and mobility management function AMF network element for network registration based on the negotiation results.

[0080] Specifically, the second access and mobility management function AMF network element is any AMF network element other than the first access and mobility management function AMF network element. The second access and mobility management function AMF network element is obtained through negotiation between the first access and mobility management function AMF network element and the network slice selection function NSSF network element.

[0081] In this step, after receiving the registration request, the first access and mobility management function AMF network element can negotiate slices with the network slice selection function NSSF network element. When the network slice selection function NSSF network element finds that the first access and mobility management function AMF network element cannot support the slicing capability of the mobile terminal, it will look for a more suitable second access and mobility management function AMF network element for network registration. In other words, the first access and mobility management function AMF network element can determine whether it needs to be redirected to the second access and mobility management function AMF network element for network registration based on the negotiation results.

[0082] Step 203: When it is determined that redirection to the second access and mobility management function AMF network element is required for network registration, the type of base station is determined based on the identification information of the base station, and the type of the base station is sent to the second access and mobility management function AMF network element, so that the second access and mobility management function AMF network element registers the mobile terminal based on the type of base station.

[0083] In this step, when the first access and mobility management function AMF network element determines that it needs to redirect to the second access and mobility management function AMF network element for network registration, it can determine the type of the base station based on the identification information of the base station and send the type of the base station to the second access and mobility management function AMF network element. In this way, the second access and mobility management function AMF network element can select a suitable access network for network registration based on the type of the base station.

[0084] In the existing technology, 5G networks support a variety of scenarios, and different scenarios have different requirements for network functions and performance. Unlike the 5G core network used by a large number of users, the 5G non-public network NPN is a 5G network service provided to certain user organizations. 5G non-public networks are generally deployed in specific areas, such as campuses or factories. When a mobile terminal is registering with the core network, the 5G core network will decide whether it can access the 5G non-public network based on the closed access group (CAG) capability of the mobile terminal, the CAG capability of the base station, and the CAG capability of the user's contract. The specific access process is as follows: Figure 3 As shown:

[0085] Step 1: The mobile terminal initiates a registration request to the base station. The base station sends the registration request and the identification information of the base station to the first access and mobility management function AMF network element. Then the first access and mobility management function AMF network element negotiates slices with the network slice selection function NSSF network element. The network slice selection function NSSF network element returns relevant information of the second access and mobility management function AMF network element to the first access and mobility management function AMF network element.

[0086] Step 2: The first access and mobility management function AMF network element redirects to the second access and mobility management function AMF network element, and sends an N14 message to the second access and mobility management function AMF network element, wherein the N14 message does not carry the type of the base station.

[0087] Step 3. After receiving the N14 message, the second access and mobility management function AMF network element can obtain the subscription information of the mobile terminal from the unified data management function UDM network element. Since the N14 message does not carry the type of base station, the second access and mobility management function AMF network element cannot perceive whether the base station is a CAG base station or a common base station. To be on the safe side, the second access and mobility management function AMF network element can only allow the mobile terminal to access first, and then release N2, and carry the type of base station through the next service request message to decide the service for the mobile terminal.

[0088] The difference between the embodiment of the present application and the prior art is that: in the embodiment of the present application, a new field can be added to the N14 message, and the type of base station is indicated by the new field, so that the N14 message can carry the type of base station. In this way, the second access and mobility management function AMF network element can know the type of base station without having to release N2 for the mobile terminal once, and obtain the base station information from the service request to decide the type of network accessed by the mobile terminal. Therefore, the way in which the mobile terminal accesses the network in the embodiment of the present application reduces the overall number of signaling interactions compared to the way in which the mobile terminal accesses the network in the prior art, thereby improving the efficiency of the mobile terminal accessing the network.

[0089] Furthermore, the above step 203, determining the type of the base station based on the identification information of the base station, includes:

[0090] Parsing identification information of the base station;

[0091] In a case where the identification information of the base station includes a closed access group identifier, determining that the type of the base station is a first base station type, wherein the first base station type refers to a base station type that accesses the mobile terminal to a non-public network;

[0092] When the closed access group identifier is not included in the identification information of the base station, the type of the base station is determined to be a second base station type, wherein the second base station type refers to a base station type that accesses the mobile terminal to a public network.

[0093] In one embodiment, when determining the type of a base station, the first access and mobility management function AMF network element needs to parse the identification information of the base station. If the identification information of the base station includes a closed access group identifier, the type of the base station can be determined to be the first base station type, that is, a CAG base station; if the identification information of the base station does not include a closed access group identifier, the type of the base station can be determined to be the second base station type, that is, an ordinary base station. It should be noted that if the contract information of the mobile terminal is CAG only, the mobile terminal can only access a CAG base station; if the contract information of the mobile terminal is not CAGonly, the mobile terminal can access both a CAG base station and an ordinary base station.

[0094] In this embodiment, the first access and mobility management function AMF network element can accurately determine the type of the base station based on the identification information of the base station, thereby facilitating the subsequent sending of the base station type to the second access and mobility management function AMF network element, and selecting a suitable access network for network registration through the second access and mobility management function AMF network element.

[0095] Further, the above step 202, in response to the registration request, performs slice negotiation with the network slice selection function NSSF network element, and determines whether it is necessary to redirect to the second access and mobility management function AMF network element for network registration according to the negotiation result, including:

[0096] In response to the registration request, obtaining the slice capability of the mobile terminal from the network slice selection function NSSF network element;

[0097] Determine whether it supports the slicing capability of mobile terminals;

[0098] If it is determined that the slicing capability of the mobile terminal is not supported by the network, it is determined that it needs to be redirected to the second access and mobility management function AMF network element for network registration;

[0099] When it is determined that it supports the slicing capability of the mobile terminal, it is determined that there is no need to redirect to the second access and mobility management function AMF network element for network registration.

[0100] In one embodiment, when the first access and mobility management function AMF network element performs slice negotiation with the network slice selection function NSSF network element, it can first obtain the slice capability of the mobile terminal from the network slice selection function NSSF network element, and then determine whether it supports the slice capability of the mobile terminal. If it is determined that it does not support the slice capability of the mobile terminal, it can be determined that it needs to be redirected to the second access and mobility management function AMF network element for network registration; if it is determined that it supports the slice capability of the mobile terminal, it can be determined that it does not need to be redirected to the second access and mobility management function AMF network element for network registration. In this way, the first access and mobility management function AMF network element can accurately determine whether it needs to be redirected to the second access and mobility management function AMF network element for network registration.

[0101] See also Figure 4 , Figure 4 A flowchart of another method for a mobile terminal to access a network provided in an embodiment of the present application. Figure 4 As shown, the method for the mobile terminal to access the network is applied to the second access and mobility management function AMF network element, and the method includes:

[0102] Step 401, receiving the type of base station sent by the first access and mobility management function AMF network element, wherein the type of base station is determined by the first access and mobility management function AMF network element based on the identification information of the base station when it is determined that redirection to the second access and mobility management function AMF network element is required for network registration; the identification information of the base station is carried in the registration request sent by the base station.

[0103] Specifically, the mobile terminal can initiate a registration request to the base station. After receiving the registration request, the base station can send the identification information of the base station together with the registration request to the first access and mobility management function AMF network element. In this way, the first access and mobility management function AMF network element can receive the registration request carrying the identification information of the base station. Then the first access and mobility management function AMF network element can negotiate slices with the network slice selection function NSSF network element. When the network slice selection function NSSF network element finds that the first access and mobility management function AMF network element cannot support the slicing capability of the mobile terminal, it will look for a more suitable second access and mobility management function AMF network element for network registration. In other words, the first access and mobility management function AMF network element can determine whether it needs to be redirected to the second access and mobility management function AMF network element for network registration based on the negotiation results. When the first access and mobility management function AMF network element determines that it needs to be redirected to the second access and mobility management function AMF network element for network registration, it can determine the type of base station based on the identification information of the base station and send the type of the base station to the second access and mobility management function AMF network element. In this way, the second access and mobility management function AMF network element can receive the type of base station sent by the first access and mobility management function AMF network element.

[0104] Step 402: Acquire the contract information of the mobile terminal, wherein the contract information is used to characterize the ability of the mobile terminal to access a non-public network.

[0105] In this step, after receiving the type of base station sent by the first access and mobility management function AMF network element, the second access and mobility management function AMF network element can obtain the subscription information of the mobile terminal from the unified data management UDM network element. The subscription information here is used to characterize the ability of the mobile terminal to access a non-public network. For example, CAGonly or not CAG only can be used to indicate the ability of the mobile terminal to access a non-public network.

[0106] Step 403: Register the mobile terminal for network access based on the type of base station and contract information.

[0107] In this step, the second access and mobility management function AMF network element can select a suitable access network based on the type of base station and contract information, and register the mobile terminal for network access.

[0108] In this embodiment, when determining that it is necessary to redirect to the second access and mobility management function AMF network element for network registration, the first access and mobility management function AMF network element can use the identification information of the base station carried in the registration request to determine the type of base station, and send the type of base station to the second access and mobility management function AMF network element, so that the second access and mobility management function AMF network element can select a suitable access network for network registration based on the type of base station. Compared with the prior art that requires the second access and mobility management function AMF network element to perform an N2 release on the mobile terminal in order to obtain base station information from the service request to decide the type of network to which the mobile terminal accesses, the way in which the mobile terminal accesses the network in the embodiment of the present application reduces the overall number of signaling interactions, thereby improving the efficiency of the mobile terminal accessing the network.

[0109] Furthermore, the above step 402, obtaining the contract information of the mobile terminal, includes:

[0110] Sending a contract information acquisition request to a unified data management (UDM) network element, wherein the contract information acquisition request is used to request to acquire contract information corresponding to the mobile terminal;

[0111] The subscription information returned by the unified data management (UDM) network element is received, wherein the subscription information is used to indicate that the mobile terminal only accesses a non-public network or the mobile terminal not only accesses a non-public network.

[0112] In one embodiment, when the second access and mobility management function AMF network element obtains the contract information of the mobile terminal, it needs to first send a contract information acquisition request to the unified data management UDM network element. At this time, the unified data management UDM network element will respond to the contract information acquisition request and return the contract information of the mobile terminal to the second access and mobility management function AMF network element. In this way, the second access and mobility management function AMF network element can receive the contract information of the mobile terminal, and then judge the CAG capability of the mobile terminal based on the contract information of the mobile terminal.

[0113] Furthermore, the above step 403, registering the mobile terminal with the network based on the type of the base station and the contract information, includes:

[0114] When the type of the base station is the first base station type and the subscription information is used to characterize that the mobile terminal only accesses a non-public network, the mobile terminal is allowed to be registered for network access, wherein the first base station type refers to a base station type that accesses the mobile terminal to the non-public network;

[0115] When the type of the base station is the first base station type and the subscription information is used to represent that the mobile terminal not only accesses a non-public network, network registration of the mobile terminal is allowed;

[0116] If the type of the base station is the second base station type and the subscription information is used to characterize that the mobile terminal only accesses a non-public network, refusing to register the mobile terminal for network access, wherein the second base station type refers to a base station type that accesses the mobile terminal to a public network;

[0117] When the type of the base station is the second base station type and the subscription information is used to represent that the mobile terminal not only accesses a non-public network, network registration of the mobile terminal is allowed.

[0118] In one embodiment, when the type of the base station is the first base station type, and the subscription information is used to indicate that the mobile terminal only accesses a non-public network, the second access and mobility management function AMF network element allows the mobile terminal to register for network access. In other words, the second access and mobility management function AMF network element allows the CAG only terminal accessed by the CAG base station to be provided with services. At this time, the interaction process of each network element is as follows: Figure 5 As shown:

[0119] Step 1: The mobile terminal initiates registration with the core network. When the first access and mobility management function AMF network element finds that it cannot support the slicing capability of the mobile terminal, it will select slices through the NSSF network element to find a more suitable second access and mobility management function AMF network element.

[0120] Step 2: After the NSSF network element returns to the second access and mobility management function AMF network element, the first access and mobility management function AMF network element will send an N1MessageNotify message (i.e., N14 message) to the second access and mobility management function AMF network element. The N1MessageNotify message can indicate that the base station is a CAG base station.

[0121] Step 3: The second access and mobility management function AMF network element obtains the subscription information of the mobile terminal and finds that the terminal is CAG only in the current public land mobile network (Public Land Mobile Network, referred to as PLMN), allowing the mobile terminal to access.

[0122] When the type of the base station is the first base station type, and the subscription information is used to indicate that the mobile terminal not only accesses the non-public network, the second access and mobility management function AMF network element allows the mobile terminal to register with the network. In other words, the second access and mobility management function AMF network element allows services to be provided to the not CAG only terminal accessed by the CAG base station. At this time, the interaction process of each network element is as follows Figure 6 shown.

[0123] Step 1: The mobile terminal initiates registration with the core network. When the first access and mobility management function AMF network element finds that it cannot support the slicing capability of the mobile terminal, it will select slices through the NSSF network element to find a more suitable second access and mobility management function AMF network element.

[0124] Step 2: After the NSSF network element returns to the second access and mobility management function AMF network element, the first access and mobility management function AMF network element will send an N1MessageNotify message (i.e., N14 message) to the second access and mobility management function AMF network element. The N1MessageNotify message can indicate that the base station is a CAG base station.

[0125] Step 3: The second access and mobility management function AMF network element obtains the subscription information of the mobile terminal and finds that the terminal is not CAG only in the current public land mobile network (Public Land Mobile Network, referred to as PLMN), allowing the mobile terminal to access.

[0126] When the type of the base station is the second base station type, and the contract information is used to indicate that the mobile terminal only accesses a non-public network, the second access and mobility management function AMF network element refuses to register the mobile terminal. In other words, the second access and mobility management function AMF network element refuses to provide services to CAG only terminals accessed by ordinary base stations. At this time, the interaction process of each network element is as follows Figure 7 shown.

[0127] Step 1: The mobile terminal initiates registration with the core network. When the first access and mobility management function AMF network element finds that it cannot support the slicing capability of the mobile terminal, it will select slices through the NSSF network element to find a more suitable second access and mobility management function AMF network element.

[0128] Step 2: After the NSSF network element returns to the second access and mobility management function AMF network element, the first access and mobility management function AMF network element will send an N1MessageNotify message (ie, N14 message) to the second access and mobility management function AMF network element. The N1MessageNotify message can indicate that the base station is a normal base station.

[0129] Step 3: The second access and mobility management function AMF network element obtains the subscription information of the mobile terminal and finds that the terminal is CAG only in the current public land mobile network (Public Land Mobile Network, referred to as PLMN), and refuses access to the mobile terminal.

[0130] When the type of the base station is the second base station type, and the subscription information is used to indicate that the mobile terminal not only accesses the non-public network, the second access and mobility management function AMF network element allows the mobile terminal to register with the network. In other words, the second access and mobility management function AMF network element allows services to be provided to not CAG only terminals accessed by ordinary base stations. At this time, the interaction process of each network element is as follows Figure 8 shown.

[0131] Step 1: The mobile terminal initiates registration with the core network. When the first access and mobility management function AMF network element finds that it cannot support the slicing capability of the mobile terminal, it will select slices through the NSSF network element to find a more suitable second access and mobility management function AMF network element.

[0132] Step 2: After the NSSF network element returns to the second access and mobility management function AMF network element, the first access and mobility management function AMF network element will send an N1MessageNotify message (ie, N14 message) to the second access and mobility management function AMF network element. The N1MessageNotify message can indicate that the base station is a normal base station.

[0133] Step 3: The second access and mobility management function AMF network element obtains the subscription information of the mobile terminal and finds that the terminal is not CAG only in the current public land mobile network (Public Land Mobile Network, referred to as PLMN), allowing the mobile terminal to access.

[0134] In this embodiment, the second access and mobility management function AMF network element can flexibly select whether to register the mobile terminal with the mobile network based on the type of base station and contract information. It can be seen from the interaction process of each network that in the process of the mobile terminal accessing the network, the overall signaling interaction between the network elements is reduced, which is conducive to reducing the load and improving the network quality; at the same time, the mobile terminal has one less N2 release and service request process, which will not cause service interruption and is conducive to improving user satisfaction.

[0135] Further, the above step 401, receiving the type of the base station sent by the first access and mobility management function AMF network element, includes:

[0136] The type of base station sent by the first access and mobility management function AMF network element is received through the target interface, wherein the target interface is the interface between the first access and mobility management function AMF network element and the second access and mobility management function AMF network element, and the field corresponding to the type of base station is a newly added field in the interface message corresponding to the target interface.

[0137] In one embodiment, the second access and mobility management function AMF network element can receive the type of base station sent by the first access and mobility management function AMF network element through the target interface. It should be noted that the target interface is the interface between the first access and mobility management function AMF network element and the second access and mobility management function AMF network element, that is, the N14 interface, and the message transmitted between the interfaces is the N14 message mentioned above. In this embodiment, a field can be added to the N14 message to identify whether the base station type is a CAG base station or an ordinary base station, so that the second access and mobility management function AMF network element can understand the type of base station more directly.

[0138] See also Fig. 9 , Fig. 9 A schematic diagram of a structure of a device for a mobile terminal to access a network provided in an embodiment of the present application. Fig. 9 As shown, the device 900 for the mobile terminal to access the network is applied to a first access and mobility management function AMF network element, and the device 900 includes:

[0139] The first receiving module 901 is used to receive a registration request sent by a base station, wherein the registration request is used to request a first access and mobility management function AMF network element to register the mobile terminal with the network, and the registration request carries identification information of the base station;

[0140] The slice negotiation module 902 is used to perform slice negotiation with the network slice selection function NSSF network element in response to the registration request, and determine whether it is necessary to redirect to the second access and mobility management function AMF network element for network registration according to the negotiation result;

[0141] The sending module 903 is used to determine the type of base station based on the identification information of the base station when it is determined that redirection to the second access and mobility management function AMF network element for network registration is required, and send the type of the base station to the second access and mobility management function AMF network element, so that the second access and mobility management function AMF network element registers the mobile terminal based on the type of base station.

[0142] Further, the sending module 903 includes:

[0143] A parsing submodule, used to parse the identification information of the base station;

[0144] A first determination submodule, configured to determine that the type of the base station is a first base station type when the identification information of the base station includes a closed access group identifier, wherein the first base station type refers to a base station type that accesses the mobile terminal to a non-public network;

[0145] The second determination submodule is used to determine that the type of the base station is a second base station type when the closed access group identifier is not included in the identification information of the base station, wherein the second base station type refers to a base station type that accesses the mobile terminal to the public network.

[0146] Further, the slice negotiation module 902 includes:

[0147] An acquisition submodule, configured to acquire the slicing capability of the mobile terminal from a network slice selection function NSSF network element in response to a registration request;

[0148] A judgment submodule is used to judge whether it supports the slicing capability of the mobile terminal;

[0149] The third determination submodule is used to determine that it needs to redirect to the second access and mobility management function AMF network element for network registration when it is determined that the slicing capability of the mobile terminal is not supported by the network itself;

[0150] The fourth determination submodule is used to determine that there is no need to redirect to the second access and mobility management function AMF network element for network registration when it is determined that the network element supports the slicing capability of the mobile terminal.

[0151] It should be noted that the device 900 for the mobile terminal to access the network can be implemented as described above. Figure 2 The steps of the method for a mobile terminal to access a network provided by the method embodiment shown can achieve the same technical effect, and will not be described one by one here.

[0152] See also Fig.10 , Fig.10 A schematic diagram of the structure of another device for a mobile terminal to access a network provided in an embodiment of the present application. Fig.10 As shown, the device 1000 for the mobile terminal to access the network is applied to a second access and mobility management function AMF network element, and the device 1000 includes:

[0153] The second receiving module 1001 is used to receive the type of the base station sent by the first access and mobility management function AMF network element, wherein the type of the base station is determined by the first access and mobility management function AMF network element based on the identification information of the base station when it is determined that it is necessary to redirect to the second access and mobility management function AMF network element for network registration; the identification information of the base station is carried in the registration request sent by the base station;

[0154] The acquisition module 1002 is used to acquire the contract information of the mobile terminal, wherein the contract information is used to characterize the ability of the mobile terminal to access a non-public network;

[0155] The network registration module 1003 is used to register the mobile terminal for network access based on the type of base station and subscription information.

[0156] Furthermore, the acquisition module 1002 includes:

[0157] The sending submodule is used to send a contract information acquisition request to the unified data management UDM network element, wherein the contract information acquisition request is used to request to obtain the contract information corresponding to the mobile terminal;

[0158] The first receiving submodule is used to receive the contract information returned by the unified data management (UDM) network element, wherein the contract information is used to indicate that the mobile terminal only accesses the non-public network or the mobile terminal not only accesses the non-public network.

[0159] Furthermore, the network registration module 1003 includes:

[0160] A first network registration submodule, configured to allow network registration of a mobile terminal when the type of the base station is a first base station type and the subscription information is used to characterize that the mobile terminal only accesses a non-public network, wherein the first base station type refers to a base station type that accesses the mobile terminal to a non-public network;

[0161] A second network registration submodule is used to allow network registration of the mobile terminal when the type of the base station is the first base station type and the subscription information is used to represent that the mobile terminal not only accesses a non-public network;

[0162] A third network registration submodule is used to refuse network registration for the mobile terminal when the type of the base station is a second base station type and the contract information is used to characterize that the mobile terminal only accesses a non-public network, wherein the second base station type refers to a base station type that accesses the mobile terminal to a public network;

[0163] The fourth network registration submodule is used to allow the mobile terminal to be registered for network access when the type of the base station is the second base station type and the contract information is used to represent that the mobile terminal not only accesses a non-public network.

[0164] Furthermore, the acquisition module 1002 includes:

[0165] The second receiving submodule is used to receive the type of base station sent by the first access and mobility management function AMF network element through the target interface, wherein the target interface is the interface between the first access and mobility management function AMF network element and the second access and mobility management function AMF network element, and the field corresponding to the type of base station is a newly added field in the interface message corresponding to the target interface.

[0166] It should be noted that the device 1000 for the mobile terminal to access the network can implement the above Figure 4 The steps of the method for a mobile terminal to access a network provided by the method embodiment shown can achieve the same technical effect, and will not be described one by one here.

[0167] like Fig.11 As shown, the embodiment of the present application further provides an electronic device, including a processor 1111, a communication interface 1112, a memory 1113 and a communication bus 1114, wherein the processor 1111, the communication interface 1112, and the memory 1113 communicate with each other through the communication bus 1114.

[0168] Memory 1113, used for storing computer programs;

[0169] In one embodiment of the present application, the processor 1111 is used to implement the steps of the method for a mobile terminal to access a network provided by any of the aforementioned method embodiments when executing the program stored in the memory 1113.

[0170] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for a mobile terminal to access a network provided in any of the aforementioned method embodiments are implemented.

[0171] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0172] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0173] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0174] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for a mobile terminal to access a network, characterized in that: Applied to a first access and mobility management function AMF network element, the method comprises: receiving a registration request sent by a base station, wherein the registration request is used to request the first access and mobility management function AMF network element to register the mobile terminal for network access, and the registration request carries identification information of the base station; In response to the registration request, perform slice negotiation with the network slice selection function NSSF network element, and determine whether it is necessary to redirect to the second access and mobility management function AMF network element for network registration according to the negotiation result; When it is determined that redirection to the second access and mobility management function AMF network element is required for network registration, the type of the base station is determined based on the identification information of the base station, and the type of the base station is sent to the second access and mobility management function AMF network element, so that the second access and mobility management function AMF network element registers the mobile terminal for network registration based on the type of the base station.

2. The method according to claim 1, characterized in that The determining the type of the base station based on the identification information of the base station includes: Parsing the identification information of the base station; In a case where the identification information of the base station includes a closed access group identifier, determining that the type of the base station is a first base station type, wherein the first base station type refers to a base station type that accesses the mobile terminal to a non-public network; When the closed access group identifier is not included in the identification information of the base station, the type of the base station is determined to be a second base station type, wherein the second base station type refers to a base station type that accesses the mobile terminal to a public network.

3. The method according to claim 1, characterized in that The responding to the registration request, performing slice negotiation with the network slice selection function NSSF network element, and determining whether it is necessary to redirect to the second access and mobility management function AMF network element for network registration according to the negotiation result, including: In response to the registration request, obtaining the slice capability of the mobile terminal from the network slice selection function NSSF network element; Determining whether the mobile terminal supports the slicing capability of the mobile terminal; When it is determined that the mobile terminal itself does not support the slicing capability of the mobile terminal, it is determined that it is necessary to redirect to the second access and mobility management function AMF network element for network registration; When it is determined that the mobile terminal supports the slicing capability, it is determined that there is no need to redirect to the second access and mobility management function AMF network element for network registration.

4. A method for a mobile terminal to access a network, characterized in that: Applied to a second access and mobility management function AMF network element, the method comprises: receiving the type of the base station sent by the first access and mobility function AMF network element, wherein the type of the base station is determined by the first access and mobility function AMF network element based on the identification information of the base station when it is determined that redirection to the second access and mobility function AMF network element is required for network registration; the identification information of the base station is carried in the registration request sent by the base station; Acquiring subscription information of a mobile terminal, wherein the subscription information is used to characterize the ability of the mobile terminal to access a non-public network; The mobile terminal is registered for network access based on the type of the base station and the subscription information.

5. The method according to claim 4, characterized in that The obtaining of the subscription information of the mobile terminal includes: Sending a contract information acquisition request to a unified data management (UDM) network element, wherein the contract information acquisition request is used to request to acquire the contract information corresponding to the mobile terminal; The subscription information returned by the unified data management (UDM) network element is received, wherein the subscription information is used to characterize that the mobile terminal only accesses a non-public network or that the mobile terminal not only accesses a non-public network.

6. The method according to claim 5, characterized in that The registering the mobile terminal with the network based on the type of the base station and the subscription information includes: When the type of the base station is a first base station type and the subscription information is used to characterize that the mobile terminal only accesses a non-public network, allowing the mobile terminal to be registered for network access, wherein the first base station type refers to a base station type that accesses the mobile terminal to a non-public network; When the type of the base station is the first base station type and the subscription information is used to represent that the mobile terminal not only accesses a non-public network, allowing the mobile terminal to be registered for network access; If the type of the base station is a second base station type and the subscription information is used to characterize that the mobile terminal only accesses a non-public network, refusing to register the mobile terminal for network access, wherein the second base station type refers to a base station type that accesses the mobile terminal to a public network; When the type of the base station is the second base station type and the subscription information is used to represent that the mobile terminal not only accesses a non-public network, network registration of the mobile terminal is allowed.

7. The method according to claim 4, characterized in that The receiving the type of the base station sent by the first access and mobility management function AMF network element includes: The type of the base station sent by the first access and mobility management function AMF network element is received through the target interface, wherein the target interface is the interface between the first access and mobility management function AMF network element and the second access and mobility management function AMF network element, and the field corresponding to the type of the base station is a newly added field in the interface message corresponding to the target interface.

8. A device for a mobile terminal to access a network, characterized in that: Applied to a first access and mobility management function AMF network element, the device comprises: A first receiving module is used to receive a registration request sent by a base station, wherein the registration request is used to request the first access and mobility management function AMF network element to register the mobile terminal for network access, and the registration request carries identification information of the base station; A slice negotiation module, configured to perform slice negotiation with a network slice selection function NSSF network element in response to the registration request, and determine whether it is necessary to redirect to a second access and mobility management function AMF network element for network registration according to the negotiation result; A sending module is used to determine the type of the base station based on the identification information of the base station when it is determined that redirection to the second access and mobility management function AMF network element is required for network registration, and send the type of the base station to the second access and mobility management function AMF network element, so that the second access and mobility management function AMF network element registers the mobile terminal for network registration based on the type of the base station.

9. A device for a mobile terminal to access a network, characterized in that: Applied to a second access and mobility management function AMF network element, the device comprises: A second receiving module is used to receive the type of the base station sent by the first access and mobility management function AMF network element, wherein the type of the base station is determined by the first access and mobility management function AMF network element based on the identification information of the base station when it is determined that it needs to be redirected to the second access and mobility management function AMF network element for network registration; the identification information of the base station is carried in the registration request sent by the base station; An acquisition module, used to acquire contract information of a mobile terminal, wherein the contract information is used to characterize the ability of the mobile terminal to access a non-public network; A network registration module is used to register the mobile terminal for network access based on the type of the base station and the subscription information.

10. An electronic device, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, for implementing the steps of the method for a mobile terminal to access a network as described in any one of claims 1 to 3, or implementing the steps of the method for a mobile terminal to access a network as described in any one of claims 4 to 7, when executing a program stored in a memory.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for a mobile terminal to access a network as described in any one of claims 1 to 3 are implemented, or the steps of the method for a mobile terminal to access a network as described in any one of claims 4 to 7 are implemented.

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