Access method and system for NSA user to roam to SA and network interworking function entity

Abstract

The invention relates to an access method and system for an NSA user to roam to an SA and a network interworking functional entity, and relates to the technical field of communication. The method comprises the steps that a network interworking function entity receives a user authentication request sent by an AMF in an SA, and the user authentication request is sent after the AMF responds to the situation that an NSA user roams to an SA coverage area and initiates an access request; the network intercommunication function entity obtains a 4G authentication vector from an HSS of an NSA network to which the NSA user belongs; the network intercommunication function entity converts the 4G authentication vector into a 5G authentication vector, generates a user authentication response according to the 5G authentication vector and returns the user authentication response to the AMF, so that the AMF and the NSA user complete mutual authentication according to the authentication response; the network intercommunication function entity receives an authentication certification request sent by the AMF, the authentication certification request comprising RES * generated by the NSA user in the mutual authentication process of the AMF and the NSA user; and the network intercommunication function entity authenticates the NSA user according to the RES * and returns an authentication result to the AMF.

Description

technical field [0001] The present disclosure relates to the field of communication technologies, and in particular, to an access method, system and network interworking functional entity for roaming an NSA user to an SA. Background technique [0002] At present, the construction of 5G network in China is in full swing. In the future, the network coverage based on SA (Independent Networking) will be the main focus, while foreign operators mostly deploy NSA (Non-Independent Networking)-based networks. Therefore, in the early stage of 5G network international roaming business, especially In the process of undertaking the NSA roaming business in China, there are a large number of NSA users roaming to the SA network. [0003] When the NSA roaming user accesses the roaming SA network, the access network element needs to send the 5G SA-based service authentication to the home network through the service interface, and the NSA user can be accessed after the authentication is passed...

AI Technical Summary

Problems solved by technology

[0004] The inventors found that: currently, when an NSA user roams to an SA network, the access network element sends SA-based service authentication to the home network. If the home network deploys a 5G core network based on NSA, the authentication at the signaling level cannot pass, resulting in The authentication fails, and NSA users cannot access the problem

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