Indirect Link Context Reuse for Low-Overhead Relay Resumption
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Solution Overview
Problem
The reconfiguration of sidelink relay adaptation protocol (SRAP) for indirect links between remote UEs and relay UEs during inactive states leads to increased signaling overhead when resuming these links, which affects processing efficiency and network performance.
Innovation Solution
Storing context information of the indirect link when it is deactivated and using this context to resume the link, thereby avoiding the need for reconfiguration, thus reducing signaling and processing overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the SRAP is reconfigured for indirect links during inactive states, then the link can be resumed, but signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by storing the SRAP configuration context before the inactive state begins. When the indirect link needs to be resumed, the pre-stored context is reused, eliminating the need for reconfiguration signaling. This resolves the contradiction by preparing the configuration in advance, thus enabling reliable link resumption without incurring signaling overhead during the resume operation.
2Reliability
If the SRAP is reconfigured for indirect links during inactive states, then the link can be resumed, but processing overhead increases
Solution Approach 1:
The patent applies preliminary action by completing the SRAP configuration processing before the inactive state begins and storing the resulting context. During link resumption, the pre-processed configuration context is directly applied without requiring additional processing operations. This resolves the contradiction by shifting the processing workload to the initial configuration phase, thus maintaining reliable link resumption while improving processing efficiency during resume operations.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may deactivate an indirect link with a second UE, the indirect link being between the first UE and a network node via the second UE. The UE may store context of the indirect link. The UE may transmit, to the network node, a resume request that includes an indication that the first UE has stored the context. Numerous other aspects are described.