NR V2X RF Switching Timing for SL DRX and UL Reliability
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing sidelink (SL) radio frequency (RF) module switching due to discontinuous reception (DRX) configurations, leading to inefficiencies in transmitting uplink data, particularly in V2X communication scenarios requiring high reliability and low latency.
Innovation Solution
The proposed method involves adjusting the time point for on/off switching of the SL RF module based on the determination that uplink data cannot be transmitted at a first time point and considering a priority value related to the UL data, allowing for more efficient SL communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If SL RF module on/off switching is performed according to SL DRX configuration at scheduled time points, then power consumption is reduced and DRX operation efficiency is improved, but uplink data transmission reliability deteriorates when switching occurs at the same time point as UL data transmission
Solution Approach 1:
The patent implements dynamic adjustment of SL RF module switching time points based on UL data transmission status. When UL data transmission is detected at a scheduled switching time point, the SL RF module switching is dynamically postponed to a later time point, ensuring that power saving operations do not interfere with high-priority uplink transmissions. This dynamic adaptation resolves the contradiction by making the switching schedule flexible rather than fixed.
Solution Approach 2:
The patent changes the time point parameter of SL RF module switching operations based on detected UL data transmission conditions. By monitoring whether UL data transmission is scheduled at the intended switching time point and adjusting the switching time accordingly (postponing when UL transmission occurs), the system optimizes both power consumption and transmission reliability through parameter adaptation.
2Reliability
If SL RF module switching time point is postponed to avoid UL data transmission, then uplink data transmission reliability is improved, but SL communication latency increases
Solution Approach 1:
The patent applies partial postponement of SL RF module switching only when necessary (i.e., when UL data transmission is detected at the scheduled time point). The switching is postponed just enough to avoid conflict with UL transmission, rather than being continuously delayed. This partial action approach minimizes latency impact while still ensuring UL transmission reliability when needed.
Solution Approach 2:
The patent dynamically adjusts the switching time point parameter based on real-time UL data transmission status. The time point is changed only when UL transmission is detected, otherwise the original scheduled time point is maintained. This conditional parameter change resolves the contradiction by balancing reliability improvement with latency minimization.
3Reliability
If SL RF module switching is continuously delayed to ensure UL data transmission, then uplink data transmission reliability is maintained, but SL communication efficiency and productivity deteriorate
Solution Approach 1:
The patent implements partial postponement of SL RF module switching only when UL data transmission is actually detected at the scheduled time point, rather than continuously delaying switching. This selective approach ensures UL transmission reliability only when necessary, preventing unnecessary delays that would harm SL communication efficiency and productivity.
Solution Approach 2:
The patent uses feedback from UL data transmission status detection to control SL RF module switching timing. The system monitors whether UL data transmission is scheduled at the intended switching time point and adjusts switching behavior accordingly (postponing only when UL transmission occurs). This feedback mechanism ensures reliability when needed while maintaining normal SL communication efficiency when no conflict exists.
Data Source
AI summary
A method for operating a first device (100) in a wireless communication system is proposed. The method may comprise the steps of: generating uplink (UL) data; on the basis of sidelink (SL) discontinuous reception (DRX) configuration-related on/off switching of a SL radio frequency (RF) module, which is performed at a first time point, determining that transmission of the UL data does not occur at the first time point; and on the basis of the determination that transmission of the UL data does not occur at the first time point and a priority value, which is related to the UL data and is smaller than a threshold value, changing a time point, at which the on/off switching of the SL RF module is performed, from the first time point to a second time point.