Sidelink Positioning Resource Pools for PSCCH-PRS Coordination
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Solution Overview
Problem
Existing sidelink communication technologies face challenges in achieving high accuracy and low latency for positioning in both in-coverage and out-of-coverage scenarios, particularly in managing resource allocation and coordination among user equipment (UEs) for efficient sidelink positioning.
Innovation Solution
The proposed solution involves dedicated resource pools for physical sidelink control channel (PSCCH) and sidelink positioning reference signals (PRS) transmissions, with pre-configured or configured mappings between PSCCH and PRS, enabling UE-to-UE coordination through trigger indications and measurement reports for improved resource selection and synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated resource pools are allocated for PSCCH and SL PRS transmissions, then positioning accuracy and reliability are improved, but resource allocation complexity and device coordination overhead increase
Solution Approach 1:
The resource pool is segmented into dedicated PSCCH resources and dedicated SL PRS resources, with separate resource pools for different functions. This segmentation allows independent optimization of control signal resources and positioning reference signal resources, improving positioning accuracy while managing complexity through modular resource management.
Solution Approach 2:
Resource mappings between PSCCH and SL PRS are pre-configured or pre-established before actual transmissions occur. This preliminary configuration reduces real-time coordination complexity by having resource allocation rules ready in advance, allowing UEs to autonomously determine resource locations without complex real-time negotiations.
2Productivity
If resource mappings between PSCCH and SL PRS are pre-configured, then resource allocation efficiency is improved, but system adaptability to dynamic conditions deteriorates
Solution Approach 1:
The resource mapping configuration is designed to be dynamic rather than static. Pre-configured mappings provide a baseline for efficient resource allocation, but the system allows updates and reconfigurations based on changing channel conditions, traffic patterns, and positioning requirements, balancing efficiency with adaptability.
Solution Approach 2:
User equipment (UE) is empowered to autonomously determine resource allocations based on pre-configured mapping rules and current conditions. This self-service capability allows the system to adapt to dynamic conditions without requiring constant network intervention, maintaining both efficiency through pre-configuration and adaptability through autonomous decision-making.
3Reliability
If UE coordination mechanisms are implemented for resource selection, then resource collision reduction is improved, but signaling overhead and latency increase
Solution Approach 1:
The coordination mechanism extracts and separates resource selection decisions from the main data transmission process. UEs exchange coordination information specifically for resource selection purposes, allowing resource collision reduction through dedicated coordination signaling while minimizing the impact on overall transmission latency by handling coordination separately and efficiently.
Data Source
AI summary
According to embodiments, a second user equipment (UE) receives an SL transmission. The SL transmission includes one or more of dedicated sidelink (SL) control signals and one or more corresponding SL positioning reference signals (PRSs) over resources in a dedicated resource pool. The dedicated resource pool is dedicated for physical sidelink control channel (PSCCH) and SL PRS transmissions. The second UE measures the one or more corresponding SL PRSS.