Relay UE UP Security Activation Across Uu and PC5 Links
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Solution Overview
Problem
Existing wireless communication methods fail to ensure consistent enforcement of security policies across Uu and PC5 links in L3 U2N relay communication, compromising end-to-end security between remote UE and base station.
Innovation Solution
A communication method where the relay UE determines the activation status of the UP security policy of the first link with the base station and activates the UP security of the second link with the remote UE based on this status, ensuring alignment of security policies across both links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate security policies are configured for Uu link and PC5 link independently, then each link can be managed separately, but end-to-end security consistency cannot be ensured
Solution Approach 1:
The patent combines the security policy management of Uu link and PC5 link into a unified mechanism. The base station generates a single security policy that is simultaneously applied to both the Uu link (between relay UE and base station) and the PC5 link (between remote UE and relay UE), ensuring end-to-end security consistency while maintaining operational simplicity.
2Reliability
If UP security is activated on both Uu link and PC5 link, then communication security is enhanced, but system complexity increases
Solution Approach 1:
The patent implements a universal security activation mechanism where a single UP security activation decision at the base station automatically applies to both Uu and PC5 links. This multi-functional approach allows the same security policy to govern both communication interfaces, enhancing security while avoiding the complexity of separate activation procedures.
Data Source
AI summary
A communication method performed by a relay user equipment (UE) includes: determining an activation status of a user plane (UP) security policy of a first link between the relay UE and a base station, and, on the basis of the activation status of the UP security policy of the first link, activating UP security of a second link between the relay UE and a remote UE. Related communication methods by a remote user equipment and a base station are also disclosed.