EP-4742766-A2 - ACCESS NETWORK DEVICE SELECTION METHOD AND APPARATUS

Abstract

This application provides an access network device selection method and an apparatus, to select a proper non-3GPP access network device for a terminal device, and relates to the field of wireless communication technologies. In the method, the terminal device may indicate, to a DNS through one or more of first indication information, second indication information, and at least one GIN, whether the terminal device needs to support external authentication. Therefore, when selecting the non-3GPP access network device for the terminal device, the DNS may consider one or more of the first indication information, the second indication information, and the at least one GIN, to select the proper non-3GPP access network device for the terminal device based on the indication of the terminal device. For example, when the terminal device supports external authentication or needs to support external authentication, the DNS may select, for the terminal device, a non-3GPP access network device capable of performing external authentication. In this way, the DNS can support the terminal device in accessing a non-public network through a non-3GPP access network.

Inventors

• XU, Yishan
• HUANG, Kang
• MA, Chuan

Assignees

• Huawei Technologies Co., Ltd.

Dates

Publication Date

20260513

Application Date

20230120

Claims (10)

1. An access network device selection method, comprising: sending, by a trusted non-3 rd generation partnership project 3GPP access network device, one or more identifiers of at least one non-public network; setting up, by the trusted non-3GPP access network device, a connection to a terminal device; receiving, by the trusted non-3GPP access network device, a registration request message from the terminal device, wherein the registration request message comprises an identifier of a first non-public network; and the identifier of the first non-public network is one of the identifiers of the at least one non-public network; and sending, by the trusted non-3GPP access network device, the registration request message to a mobility management device, wherein the mobility management device is configured to perform access management on the terminal device, and the mobility management device is determined based on the identifier of the first public network.
2. The method according to claim 1, further comprising: receiving, by the trusted non-3GPP access network device, first information from the terminal device, wherein the first information indicates onboarding or external authentication; selecting, by the trusted non-3GPP access network device, a mobility management device that supports onboarding or external authentication; and sending, by the trusted non-3GPP access network device, the registration request message to the mobility management device.
3. The method according to claim 1 or 2, further comprising: sending, by the trusted non-3GPP access network device, one or more of first indication information, second indication information, and at least one group identifier for network selection GIN, wherein the first indication information indicates that the at least one non-public network supports onboarding; the second indication information indicates that the at least one non-public network supports external authentication; and the at least one GIN is an identifier of a group to which one or more default credentials servers or credentials holders belong.
4. The method according to any one of claims 1 to 3, wherein the sending, by a trusted non-3GPP access network device, one or more identifiers of at least one non-public network comprises: sending, by the trusted non-3GPP access network device, a broadcast message, wherein the broadcast message comprises the one or more identifiers of the at least one non-public network.
5. The method according to either of claims 3 and 4, wherein the first indication information or the second indication information is a name of a network list.
6. The method according to claim 5, wherein the first indication information is a name of a first network list, and the second indication information is a name of a second network list, wherein the first network list comprises an identifier of at least one second non-public network, and the at least one second non-public network supports onboarding; and the second network list comprises an identifier of at least one third non-public network, the at least one third non-public network supports external authentication, and the identifiers of the at least one non-public network comprise the identifier of the at least one second non-public network and/or the identifier of the at least one third non-public network.
7. A communication apparatus, comprising a module configured to perform the method according to any one of claims 1 to 6.
8. A communication apparatus, comprising a processor and an interface circuit, wherein the interface circuit is configured to receive a signal from another communication apparatus other than the communication apparatus and transmit the signal to the processor, or send a signal from the processor to the another communication apparatus other than the communication apparatus, and the processor is configured to implement, through a logic circuit or by executing code instructions, the method according to any one of claims 1 to 6.
9. A computer-readable storage medium, wherein the storage medium stores a computer program or instructions; and when the computer program or the instructions are executed by a communication apparatus, the method according to any one of claims 1 to 6 is implemented.
10. A computer program product, comprising computer-executable instructions, wherein when the instructions are run on a computer, the method according to any one of claims 1 to 6 is performed.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202210108074.1, filed with the China National Intellectual Property Administration on January 28, 2022 and entitled "ACCESS NETWORK DEVICE SELECTION METHOD AND APPARATUS", which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the field of wireless communication technologies, and in particular, to an access network device selection method and an apparatus. BACKGROUND A non-public network is a network that is different from a public network and provides a service for a specific user. When a terminal device wants to obtain access to a service of the non-public network, the terminal device may register with the non-public network, to obtain access to the related service. Currently, the terminal device may access the non-public network through a non-3rd generation partnership project (3rd generation partnership project, 3GPP) access network device. In a conventional technology, the terminal device may access the non-public network to obtain access to the service of the non-public network. Because different non-3GPP access network devices support different capabilities, a proper non-3GPP access network device needs to be selected for the terminal device to access the non-public network via a non-3GPP access type, and in this way, the terminal device accesses the non-public network through the non-3GPP access network device. Therefore, how to select the proper non-3GPP access network device for the terminal device becomes a technical problem to be resolved. SUMMARY This application provides an access network device selection method and an apparatus, to select a proper non-3GPP access network device for a terminal device. According to a first aspect, an access network device selection method is provided. The method may be performed by a terminal device or a chip with similar functions of a terminal device. In the method, the terminal device sends a query message to a domain name server (domain name server, DNS). The query message includes one or more of the following: first indication information, second indication information, and at least one group identifier for network selection (group identifier for network selection, GIN). The first indication information indicates onboarding, and the second indication information indicates external authentication. The at least one GIN is an identifier of a group to which one or more default credentials servers (default credentials server, DCS) or credentials holders (credentials holder, CH) belong. The query message is used to request to obtain a non-3GPP access network device identifier, and a non-3GPP access network device corresponding to the non-3GPP access network device identifier is located in a first non-public network. The terminal device receives a query response from the DNS, where the query response includes the non-3GPP access network device identifier. Based on the foregoing solution, the terminal device may indicate, to the DNS through one or more of the first indication information, the second indication information, and the at least one GIN, whether the terminal device needs to support external authentication. Therefore, when selecting the non-3GPP access network device for the terminal device, the DNS may consider one or more of the first indication information, the second indication information, and the at least one GIN, to select the proper non-3GPP access network device for the terminal device based on the indication of the terminal device. For example, when the terminal device supports external authentication or needs to support external authentication, the DNS may select, for the terminal device, a non-3GPP access network device capable of performing external authentication. In this way, the DNS can support the terminal device in accessing a non-public network through a non-3GPP access network. In a possible case, the first indication information indicates onboarding. For example, the terminal device needs to access the non-public network to perform onboarding. In another possible case, the first indication information indicates whether the terminal device supports onboarding. In still another possible case, the first indication information may indicate whether the non-3GPP access network device or a non-public network in which the non-3GPP access network device is located supports onboarding or needs to support onboarding. In a possible case, the second indication information indicates external authentication. For example, the terminal device needs to access the non-public network to perform external authentication. In another possible case, the second indication information indicates whether the terminal device supports external authentication. In still another possible case, the second indication information may indicate whether the non-3GPP access network device or a non-public network in which