UE-to-UE Relay Link Identifier Updates Without Service Interruption
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing link identifier updates for UE-to-UE relays, particularly in ensuring privacy and security while maintaining uninterrupted communication services.
Innovation Solution
A method and apparatus for performing link identifier update procedures in wireless communication systems, specifically for UE-to-UE relays, which includes updating Layer-2 IDs and IP addresses to ensure privacy and security, and integrating these updates into the unicast link establishment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If link identifier updates are performed for UE-to-UE relays, then privacy and security are improved, but communication interruption risk increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing a new unicast link with the target UE before the actual link identifier update occurs. The relay node prepares the new link in advance, including establishing the link with the target UE and configuring necessary parameters, so that when the update is needed, the new link is ready to take over immediately without interruption.
Solution Approach 2:
The relay node acts as an intermediary that coordinates the link identifier update process between the source UE and target UE. It manages the transition by maintaining the old link until the new link is fully prepared, then switching the data flow through the new link while keeping the old link active as a backup, thus preventing communication interruption.
2Adaptability or versatility
If link identifier updates are performed dynamically, then adaptability is improved, but system complexity increases
Solution Approach 1:
The patent segments the link identifier update procedure into distinct, manageable steps: (1) receiving the update request from the source UE, (2) establishing a new unicast link with the target UE, (3) preparing the new link configuration, and (4) executing the switch when appropriate. This segmentation makes the complex dynamic update process more manageable and implementable.
Solution Approach 2:
The patent implements dynamics by allowing the link identifier update to occur based on real-time conditions and requirements. The relay node can dynamically decide when to perform the update, which link identifiers to change, and how to manage the transition, making the system adaptable to varying network conditions while following a structured procedure.
3Reliability
If Layer-2 IDs and IP addresses are updated, then security is improved, but processing time increases
Solution Approach 1:
The relay node performs preliminary actions by pre-configuring the new link with the target UE before the actual security update is needed. This includes pre-establishing the connection, pre-configuring security parameters, and pre-preparing the link identifiers, so that when the update executes, only the final switch needs to occur, minimizing processing time.
Solution Approach 2:
The patent ensures continuity of useful action by maintaining the old link active during the preparation of the new link. The relay node continues to forward traffic through the old link while simultaneously preparing the new secure link, so that security updates can be applied without stopping data flow, thus reducing the perceived processing time impact.
Data Source
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AI summary
A method and device are disclosed from the perspective of a User Equipment-to-User Equipment, UE-to-UE, Relay to perform a link identifier update procedure. In one embodiment, the method includes the UE-to-UE Relay receiving a first PC5-S message from a first UE to modify at least one first link identifier, wherein the first PC5-S message includes a Layer-2 Identity, ID, of the first UE (1405). The method also includes the UE-to-UE Relay transmitting a second PC5-S message to a second UE, in response to reception of the first PC5-S message, to modify at least one second link identifier, wherein the second PC5-S message includes a Layer-2 ID of the UE-to-UE Relay and does not include the Layer-2 ID of the first UE (1410).