Relay UE Authentication Revocation With Selective PDU and PC5 Release
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing and maintaining PDU sessions for remote user equipment (UE) when secondary authentication is revoked, particularly when multiple remote UEs are connected through a relay UE, leading to potential service disruptions for other UEs.
Innovation Solution
A method and apparatus for determining whether to maintain or release PDU sessions and PC5 links based on the revocation of secondary authentication for remote UEs, involving network entities like SMF and DN-AAA to manage PDU session release requests and ensure that only affected UEs are disconnected while preserving service continuity for others.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If secondary authentication is revoked for a remote UE, then security is improved, but service continuity deteriorates for other UEs using the same PDU session
Solution Approach 1:
The patent segments the PDU session management by introducing a distinction between the relay UE's PDU session and individual remote UE connections. When secondary authentication is revoked for one remote UE, only that specific remote UE's connection is terminated while the relay UE's PDU session and other remote UEs' connections remain intact. This is achieved by tracking which remote UEs are using which PDU sessions and selectively releasing only the affected remote UE connections.
2Loss of energy
If PDU session is released for relay UE, then resource management is improved, but service availability deteriorates for all connected remote UEs
Solution Approach 1:
The patent applies local quality by making the PDU session release decision specific to each remote UE rather than applying it globally to all remote UEs. The network determines whether another remote UE is using the PDU session locally at the session management function, and only releases the PDU session if no other remote UE is using it. This allows precise control over resource release while maintaining service availability for unaffected remote UEs.
3Reliability
If authentication revocation is applied to relay UE, then security control is improved, but service disruption increases for remote UEs
Solution Approach 1:
The patent extracts the secondary authentication revocation from the relay UE level and applies it specifically to the remote UE level. Instead of revoking authentication for the entire relay UE connection, the system identifies and terminates only the specific remote UE's secondary authentication while preserving the relay UE's primary authentication and its ability to serve other remote UEs. This extraction minimizes service disruption while maintaining security control.
Data Source
AI summary
A method for discarding authentication of a user equipment in a wireless communication system, including: determining, by a network, authentication revocation of a first remote user equipment; determining whether or not a PDU session of a relay user equipment, which is used by the first remote user equipment, is used by another remote user equipment; and transmitting, to the relay user equipment, a release request for the PDU session of the relay user equipment or a release request for a PC5 link of the first remote user equipment.