SL PRS Resource Allocation for Non-Overlapping PSFCH
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing resource blocks for sidelink feedback channels and positioning reference signals, leading to overlapping and interference issues that affect reliability and latency in V2X communications.
Innovation Solution
A method and apparatus for wireless communication that involves obtaining and transmitting sidelink positioning reference signals (SL PRS) within specific resource blocks that do not overlap with physical sidelink feedback channel (PSFCH) resource blocks, using SL PRS configuration information to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resource blocks are allocated for both PSFCH and SL PRS, then communication functionality is enhanced, but resource overlap and interference occur
Solution Approach 1:
The patent divides the resource block allocation into distinct segments: one set of resource blocks is dedicated to PSFCH transmission while another set is dedicated to SL PRS transmission. This segmentation prevents overlap and interference between the two functions, allowing both to operate simultaneously without compromising each other.
Solution Approach 2:
The patent resolves the resource conflict by introducing a dimensional distinction in resource block selection. Instead of using the same resource blocks for both PSFCH and SL PRS, the system selects resource blocks from different dimensional spaces (different frequency or time resources), thereby eliminating interference while maintaining both communication functionalities.
2Measurement precision
If resource blocks are allocated for SL PRS, then positioning accuracy is improved, but latency increases due to resource coordination overhead
Solution Approach 1:
The patent applies preliminary action by pre-configuring and pre-allocating resource blocks for SL PRS transmission before actual positioning measurements are performed. The resource blocks are reserved in advance based on configuration information, eliminating the need for real-time resource coordination and reducing latency during the actual positioning operation.
Solution Approach 2:
The system enables self-service by allowing UEs to autonomously select and transmit SL PRS in pre allocated resource blocks without requiring continuous network coordination. The configuration information provided to UEs enables them to independently manage their positioning signal transmission, reducing coordination overhead and associated latency.
3Reliability
If resource blocks for PSFCH and SL PRS are made non-overlapping, then interference is reduced, but resource allocation complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the network provides configuration information to UEs about the allocated resource blocks for SL PRS. This feedback loop enables UEs to understand which resource blocks are designated for positioning and which for feedback, simplifying their decision-making process and reducing allocation complexity while maintaining non-overlapping resource usage.
Data Source
AI summary
Provided are a method by which a first apparatus performs wireless communication, and an apparatus supporting same. The method may comprise the steps of: acquiring information related to a set of resource blocks (RBs) for a physical sidelink feedback channel (PSFCH); acquiring sidelink (SL) positioning reference signal (PRS) configuration information including information related to a set of RBs for an SL PRS; and on the basis of the SL PRS configuration information, transmitting the SL PRS to a second apparatus within the set of RBs for the SL PRS, wherein the set of RBs for the SL PRS may not overlap with the set of RBs for the PSFCH.