Sidelink PRS Resource Sensing for V2X Interference Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing sidelink positioning reference signals (PRS) resources, leading to potential overlap and interference, which affects the reliability and latency of vehicle-to-everything (V2X) communication.
Innovation Solution
A method and device for determining and managing sidelink PRS candidate resources by evaluating reference signal received power (RSRP) and resource overlap thresholds, allowing for the exclusion of overlapping resources and optimized PRS transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SL PRS resources are allocated without sensing and exclusion mechanisms, then resource allocation is simple and fast, but resource overlap and interference occur reducing positioning reliability
Solution Approach 1:
The UE performs sensing operations before selecting SL PRS resources to identify and exclude resources that would cause overlap or interference. This preliminary action of measuring RSRP values and comparing against thresholds prevents resource conflicts before they occur, ensuring reliable positioning while maintaining efficient resource utilization
Solution Approach 2:
The system uses RSRP measurement feedback from sensed signals to dynamically adjust resource selection. By continuously monitoring the radio environment and using RSRP values as feedback, the UE can make informed decisions about which resources to select or exclude, improving positioning reliability through adaptive resource management
2Measurement precision
If SL PRS resources are selected without considering RSRP thresholds, then resource selection is faster, but interference from strong signals increases reducing positioning accuracy
Solution Approach 1:
The system changes the parameter of resource selection by introducing RSRP threshold comparisons. Resources are excluded based on whether their RSRP values exceed predetermined thresholds, which directly improves positioning accuracy by preventing interference from strong signals while maintaining efficient selection through standardized threshold criteria
3Reliability
If all candidate SL PRS resources are used for transmission, then resource utilization is high, but overlapping resources cause interference reducing communication reliability
Solution Approach 1:
The system extracts and excludes problematic resources from the candidate set by comparing RSRP values against thresholds. Resources that would cause overlap or interference are removed from the available pool before final selection, ensuring that only clean, non-interfering resources are used for SL PRS transmission, thereby maintaining both reliability and efficient utilization
Data Source
AI summary
A method of operating a first device 100 in a wireless communication system is proposed. The method may comprise: determining at least one first SL PRS candidate resource for transmitting a first PRS; receiving, from a second device 200, first control information related to SL PRS through a first control channel related to SL PRS; obtaining information related to at least one first SL PRS resource to be used by the second device 200, based on the first control information; excluding at least one second SL PRS resource from the at least one first SL PRS candidate resource, based on an RSRP value related to the first control information being greater than or equal to a first threshold and a number of the at least one second SL PRS resource, in which the at least one first SL PRS candidate resource and the at least one first SL PRS resource overlap, being greater than or equal to a second threshold.