Sidelink Configuration Failure Detection in 5G Unicast Links
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Solution Overview
Problem
Current wireless communication systems face challenges in detecting and managing configuration failures in sidelink communication, particularly in the Access Stratum (AS) layer, which can lead to inefficiencies and disruptions in unicast links within 5G networks.
Innovation Solution
A method and apparatus for a UE in RRC_CONNECTED state to detect configuration failures by transmitting a PC5 RRC message with AS-layer configuration to a second UE and a network node, allowing for timely identification and resolution of configuration issues, ensuring seamless sidelink communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If AS-layer configuration is transmitted to second UE for unicast link establishment, then sidelink communication capability is improved, but configuration failure risk increases
Solution Approach 1:
The patent implements a feedback mechanism where the first UE monitors the status of AS-layer configuration transmission to the second UE. When configuration failure is detected, the first UE sends an RRC message to the network node reporting the failure, enabling the network to retransmit or adjust the configuration, thus resolving the contradiction between enabling sidelink communication and preventing configuration failures.
2Reliability
If configuration failure detection is implemented, then network reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by implementing configuration failure detection only for AS-layer configurations in sidelink unicast scenarios, rather than monitoring all configuration types. The RRC message reporting is triggered only when specific configuration failures occur, reducing unnecessary signaling overhead while maintaining network reliability for critical configurations.
3Ease of operation
If RRC message reporting is implemented for configuration failure, then configuration management is improved, but communication delay increases
Solution Approach 1:
The patent implements preliminary action by having the first UE proactively monitor and detect AS-layer configuration status before actual sidelink communication is impacted. When configuration failure is detected, the RRC message is immediately reported to the network node, allowing the network to take corrective actions before communication disruptions occur, thus improving configuration management while minimizing actual communication delays.
Data Source
AI summary
A method and apparatus are disclosed from the perspective of a first UE (User Equipment) in RRC_CONNECTED to detect configuration failure. In one embodiment, the method includes the first UE transmitting a first PC5 RRC (Radio Resource Control) message to a second UE, wherein the first PC5 RRC message includes an AS (Access Stratum)-layer configuration for a unicast link established with the second UE. The method also includes the first UE transmitting a fourth RRC message to a network node if a configuration failure of the AS-layer configuration is detected, wherein the fourth RRC message indicates the configuration failure occurs.