Communication method and device

By using the first mobility management network element to generate the second mobility management network element key in the dual 3GPP access scenario, deducing the second security protection key, the security guarantee problem in the dual 3GPP access scenario is solved, and more efficient network performance is achieved.

CN119729469AActive Publication Date: 2025-03-28HUAWEI TECH CO LTD
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Patent Information

Application Number
CN202311268332.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-26
Publication Date
2025-03-28
Estimated Expiration
2043-09-26

AI Technical Summary

Technical Problem

In dual 3GPP access scenarios, the prior art is difficult to effectively ensure security, especially when the terminal device requires multiple master authentication, resulting in process redundancy and network performance degradation.

Method used

The registration request of the terminal device is received through the first mobility management network element and generates a second mobility management network element key based on its key, for deducing the second security protection key, thereby safely protecting the messages transmitted on the second non-access layer connection, avoiding unnecessary authentication processes.

Benefits of technology

It improves security in dual 3GPP scenarios, reduces unnecessary authentication processes, and improves network performance.

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Abstract

The invention discloses a communication method and device, which are used for avoiding unnecessary authentication processes in a double 3GPP (3rd Generation Partnership Project) access type scene. The method comprises: a terminal device sends a registration request to a second AMF, the registration request comprising indication information, and the indication information being used for indicating double 3GPP access. And the second AMF sends a first message to the first AMF, wherein the first message comprises the registration request. A first NAS connection based on the 3GPP access type exists between the terminal device and the first AMF. And the first AMF generates a second AMF key corresponding to the second NAS connection according to the first AMF key corresponding to the first NAS connection. The second NAS connection is a connection based on the 3GPP access type between the terminal device and the second AMF. And the first AMF sends a second message to the second AMF, wherein the second message comprises the second AMF key.
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