Sidelink PRS Resource Selection for Measurement Gap Overlap
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing sidelink communication, particularly in managing measurement gap periods and overlapping resources for positioning reference signals, which affects the reliability and efficiency of vehicle-to-everything (V2X) communication.
Innovation Solution
A method and device for performing wireless communication that involve obtaining information about measurement gap periods, determining the transmission of positioning reference signals (PRS) by selecting resources that minimize overlapping with other PRS configurations, and transmitting these signals to enable efficient positioning for devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple SL PRS configurations are transmitted during measurement gap period, then positioning accuracy is improved, but resource overlap and interference increase
Solution Approach 1:
The patent implements dynamic resource selection where the transmitting device adaptively chooses time-frequency resources for SL PRS based on real-time detection of other PRS transmissions. The device dynamically adjusts resource allocation by selecting resources that minimize overlap, transforming a static resource configuration into a dynamic adaptation process that resolves the contradiction between maintaining multiple PRS configurations for positioning accuracy and avoiding resource interference.
Solution Approach 2:
The patent employs a feedback mechanism where the transmitting device monitors the measurement gap period for PRS transmissions from other devices, detects potential resource overlaps, and adjusts its own PRS resource selection accordingly. This closed-loop feedback system enables the device to respond to actual channel conditions and other transmissions, optimizing resource utilization while maintaining positioning accuracy through multiple PRS configurations.
2Object-generated harmful factors
If resource selection is optimized to minimize overlap, then interference is reduced, but resource utilization efficiency decreases
Solution Approach 1:
The patent applies partial action by selecting only the necessary subset of available PRS resources that minimizes overlap with other transmissions while still achieving sufficient positioning accuracy. Rather than transmitting all configured SL PRS resources or randomly selecting from all possibilities, the device performs selective resource allocation that achieves the minimum required performance, thereby reducing interference without completely sacrificing resource utilization efficiency.
3Reliability
If SL data transmission is restricted during measurement gap period, then positioning reliability is improved, but communication throughput decreases
Solution Approach 1:
The patent implements periodic action by designating specific measurement gap periods dedicated exclusively to SL PRS transmission and reception. During these periodic intervals, SL data transmission is suspended to ensure reliable positioning measurements, while data transmission continues during non-gap periods. This periodic structure ensures that positioning reliability is maintained during critical measurement windows while minimizing the overall impact on communication throughput by allowing normal data transmission to resume immediately after the gap period.
Data Source
AI summary
An operations method of a first device 100 in wireless communication system is proposed. The method may comprise: obtaining information related to a measurement gap period in which a plurality of SL PRS configurations are configured; selecting at least one second resource for a transmission of a second PRS, based on a second SL PRS configuration included in the plurality of SL PRS configurations, such that a number of overlapping resources with at least one first resource related to a first SL PRS configuration is less than or equal to a threshold.