Sidelink Positioning Reference Signal Resource Configuration
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Solution Overview
Problem
There is a need for a method to prevent collisions between sidelink positioning reference signals (SL PRS) and other reference signals in a shared resource pool during sidelink communication, to improve the simultaneous transmission and reception performance of positioning signals in wireless communication systems.
Innovation Solution
A method where a user equipment (UE) and a base station configure sidelink positioning reference signal (SL PRS) resources and phase tracking reference signal (PTRS) resources in a shared resource pool, ensuring that the PTRS is transmitted on a resource that does not overlap with the SL PRS, allowing for effective positioning measurements even when the UE is outside the base station's coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SL PRS and PTRS are transmitted in a shared resource pool, then resource utilization is improved, but signal collision occurs between positioning signals and reference signals
Solution Approach 1:
The shared resource pool is segmented into distinct resource sets: one for SL PRS transmission and another for PTRS transmission. This segmentation prevents signal collision while maintaining high resource utilization by allowing both positioning and reference signals to coexist in the same overall resource pool without interfering with each other.
Solution Approach 2:
The patent resolves the conflict by introducing additional dimensions for resource differentiation, such as frequency domain resources, time domain resources, or code domain resources. This allows SL PRS and PTRS to be multiplexed in the shared resource pool across different dimensions, preventing collision while maximizing resource utilization.
2Productivity
If SL PRS resources are configured in a shared resource pool with PSSCH, then resource efficiency is improved, but positioning measurement accuracy deteriorates due to signal overlap
Solution Approach 1:
The shared resource pool is divided into separate resource configurations for SL PRS and PSSCH. By allocating specific time-frequency resources exclusively for positioning reference signals and others for data transmission, the patent prevents signal overlap that would degrade measurement accuracy while maintaining overall resource efficiency through shared pool management.
Solution Approach 2:
Different quality requirements are applied to different parts of the shared resource pool. SL PRS resources are configured with specific properties (e.g., power levels, resource elements) optimized for positioning measurements, while PSSCH resources maintain their data transmission characteristics. This local quality differentiation ensures accurate positioning measurements without compromising resource efficiency.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A user equipment (UE) includes transceiver, and a controller coupled to the transceiver, and configured to receive, from a base station, first information configuring sidelink positioning reference signal (SL PRS) resources in a shared resource pool, receive, from the base station, second information configuring phase tracking reference signal (PTRS) resources, and transmit, to the base station, a PTRS on a PTRS resource which is not overlapped with an SL PRS resource, wherein the shared resource pool is for the SL PRS resources and physical sidelink shared channel (PSSCH) resources.