Sidelink BWP DRX Control for Reliable Low-Latency Communication
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Solution Overview
Problem
The increasing demand for mobile broadband communication and the need for enhanced reliability and low latency in wireless communication systems, particularly in sidelink communication, are not adequately addressed by existing Radio Access Technologies (RATs, such as LTE and 5G NR, especially in scenarios like vehicle-to-everything (V2X) communication, which face challenges in managing bandwidth parts (BWP) and discontinuous reception (DRX) configurations.
Innovation Solution
A method and device for managing sidelink (SL) bandwidth parts (BWP) and discontinuous reception (DRX) configurations by obtaining and canceling SL DRX command Medium Access Control (MAC) control elements (CE) based on BWP deactivation, ensuring active times are included in DRX timer operations, thereby optimizing communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SL DRX command MAC CE is triggered to stop DRX timers, then communication reliability is improved, but device complexity increases due to additional cancellation logic when BWP is deactivated
Solution Approach 1:
The patent applies preliminary action by checking whether the SL BWP is deactivated before finalizing the DRX command MAC CE transmission. This pre-check prevents unnecessary MAC CE transmission in deactivated BWPs, reducing device complexity while maintaining reliability improvement through proper DRX timer management in active BWPs.
2Productivity
If DRX timers are managed to include active time, then communication efficiency is improved, but loss of time occurs due to timer management overhead
Solution Approach 1:
The patent implements feedback mechanisms where the UE monitors BWP activation status and provides feedback information about DRX timer status. This feedback enables dynamic adjustment of DRX configuration, improving communication efficiency by ensuring timers are active only when needed while minimizing time loss through optimized timer management based on real-time BWP state.
Data Source
AI summary
Provided are a method by which a first device performs wireless communication, and a device for supporting same. The method may comprise the steps of: acquiring a configuration related to a sidelink (SL) bandwidth part (BWP); acquiring a SL discontinuous reception (DRX) configuration including information related to a SL DRX on-duration timer and/or information related to a SL DRX inactivity timer; triggering a SL DRX command medium access control (MAC) control element (CE) for stopping the SL DRX on-duration timer or the SL DRX inactivity timer; and cancelling the triggered SL DRX command MAC CE on the basis of the SL BWP being inactivated.