NR V2X Sidelink Resource Selection Within DRX Active Time
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing sidelink (SL) communication for vehicle-to-everything (V2X) scenarios, particularly in terms of resource allocation and latency, which are crucial for applications like vehicle platooning and advanced driving.
Innovation Solution
A method is proposed that involves determining a sensing window and a selection window within an SL discontinuous reception (DRX) configuration to select resources for SL transmission, transmitting sidelink control information (SCI) through a physical sidelink control channel (PSCCH), and then transmitting SL data through a physical sidelink shared channel (PSSCH) based on these selected resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resource selection is performed continuously without DRX, then resource allocation efficiency is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic resource selection at DRX active times instead of continuous resource selection. The UE determines active time based on DRX configuration and performs sensing and resource selection only during these periodic active periods, thereby reducing power consumption while maintaining adequate resource allocation efficiency for V2X communications.
2Reliability
If DRX active time is extended to ensure resource selection, then communication reliability is improved, but latency increases
Solution Approach 1:
The patent performs sensing during the active time period before the actual resource selection and transmission. By conducting sensing operations preliminarily during active time and preparing resource candidates in advance, the system ensures reliable resource selection while minimizing the time delay when data needs to be transmitted immediately.
Solution Approach 2:
The patent dynamically adjusts the selection window configuration based on active time constraints. The selection window is configured to fit within active time periods, and resource selection parameters are adapted dynamically to balance between ensuring sufficient sensing time for reliability and minimizing latency for time-critical V2X communications.
3Measurement precision
If sensing window is configured to cover all possible resources, then resource selection accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent segments the resource selection process into distinct phases: sensing during active time, resource candidate identification, and final selection. The sensing window is configured to cover only relevant resources within active time periods, dividing the overall resource space into manageable segments that can be processed efficiently without sacrificing selection accuracy for V2X communications.
Data Source
AI summary
Proposed is a method for operation of a first device (100) in a wireless communication system. The method may comprise the steps of: determining a sensing window; determining a selection window to be included in an active time of a sidelink (SL) discontinuous reception (DRX) configuration related to an SL DRX operation of a second device (200); selecting a resource for SL transmission in the selection window on the basis of sensing performed in the sensing window; transmitting, to the second device (200), sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) through a physical sidelink control channel (PSCCH) on the basis of the resource; and transmitting SL data to the second device (200) through the PSSCH on the basis of the resource.