Sidelink Failure Management in 5G User Equipment
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in managing sidelink failures effectively, which can impact the reliability and efficiency of vehicle-to-everything (V2X) services and other sidelink communications.
Innovation Solution
The proposed method involves a user equipment (UE) implementing a sidelink failure management strategy that includes obtaining sidelink access stratum (AS) configurations through PC5 RRC signaling, handling sidelink AS configuration failures, and performing sidelink full reconfiguration to ensure seamless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink AS configuration is obtained through PC5 RRC signaling during handover, then sidelink communication continuity is improved, but configuration failure risk increases
Solution Approach 1:
The patent applies preliminary action by obtaining the sidelink AS configuration from the target cell through PC5 RRC signaling before the handover is completed. This allows the UE to be pre-configured with the target cell's sidelink parameters, ensuring seamless sidelink communication continuity during the handover process and preventing configuration failures that would occur if configuration were obtained after handover.
2Reliability
If sidelink full reconfiguration is performed to ensure seamless communication, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the reconfiguration process into distinct phases: obtaining sidelink AS configuration from target cell, detecting configuration failures, and performing sidelink full reconfiguration only when necessary. This segmented approach ensures communication reliability by maintaining active sidelink configurations during handover while reducing overall device complexity by avoiding unnecessary full reconfigurations.
Solution Approach 2:
The patent implements feedback mechanisms by monitoring sidelink AS configuration status and detecting configuration failures. When a configuration failure is detected, the system triggers a sidelink full reconfiguration process. This feedback-driven approach maintains high communication reliability by responding to actual configuration issues while minimizing unnecessary reconfigurations, thereby reducing device complexity.
Data Source
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Figure 3
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AI summary
A user equipment (UE) and a method for sidelink failure management are provided. The method includes receiving, from a source cell, a first message including a sidelink Radio Resource Control (RRC) configuration associated with a target cell; determining that a sidelink failure event associated with an associated sidelink destination UE occurs; and transmitting a sidelink failure report indicating the sidelink failure event to the target cell after performing a handover procedure to switch from the source cell to the target cell.