SL PRS Resource Mapping for Retransmission-Aware V2X Positioning
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Solution Overview
Problem
Existing technologies have not effectively addressed the need for efficient and reliable sidelink positioning reference signal (PRS) configuration and resource allocation in wireless communication systems, particularly in the context of vehicle-to-everything (V2X) communication, which is crucial for enhancing mobile broadband communication and supporting ultra-reliable and low-latency communication.
Innovation Solution
A method and device for configuring sidelink positioning reference signal (SL PRS) resources, including obtaining configuration information, receiving SL PRS on a first resource, and transmitting SL PRS retransmission request information on a second resource, where the second resource is determined based on comb size or resource element (RE) offset of the SL PRS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SL PRS resource allocation is optimized, then positioning accuracy is improved, but system complexity increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting comb size and resource element offset parameters to determine the second resource for retransmission requests. By varying these parameters based on channel conditions and positioning requirements, the system achieves accurate positioning while managing configuration complexity through standardized parameter sets.
Solution Approach 2:
The patent implements dynamics by making the resource allocation adaptive rather than fixed. The second resource is dynamically determined based on the comb size and resource element offset of the SL PRS, allowing the system to adjust to varying operational conditions while maintaining positioning accuracy.
2Reliability
If SL PRS retransmission mechanism is implemented, then reliability is improved, but latency increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the comb size and resource element offset parameters before the actual positioning measurement. This allows the retransmission resource to be determined in advance, reducing the time needed for resource allocation and minimizing latency while maintaining reliability through the retransmission mechanism.
Solution Approach 2:
The patent implements feedback by establishing a retransmission request mechanism where the receiving device can request retransmission of SL PRS if initial measurements are insufficient. This feedback loop improves reliability by ensuring adequate measurement quality while the structured feedback protocol minimizes additional latency.
3Productivity
If comb size and RE offset are used to determine second resource, then resource allocation efficiency is improved, but configuration complexity increases
Solution Approach 1:
The patent uses parameter changes by employing comb size and resource element offset as key parameters to efficiently determine the second resource. These parameter transformations enable compact representation and efficient calculation of resource allocations, improving productivity while the parameters themselves provide a structured approach to configuration.
Solution Approach 2:
The patent applies dimensionality change by transforming the resource allocation problem into a different parameter space using comb size and resource element offset. This dimensional transformation simplifies the configuration process and improves allocation efficiency by working with transformed parameters rather than direct resource indices.
Data Source
AI summary
A method by which a first device performs wireless communication and a device for supporting same are provided. The method may comprise the steps of: acquiring sidelink (SL) positioning reference signal (PRS) configuration information including information related to an SL PRS resource; receiving an SL PRS on a first resource; and transmitting SL PRS retransmission request information on a second resource. For example, the second resource can be determined on the basis of the comb size of the SL PRS and/or a resource element (RS) offset of the SL PRS.