Sidelink PRS Scheduling Within PSSCH for Low-Latency Positioning
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Solution Overview
Problem
The increasing demand for mobile broadband communication and V2X services necessitates improved sidelink communication methods to manage data traffic and ensure reliability and low latency, particularly in vehicle-to-everything scenarios.
Innovation Solution
A method and device for performing wireless communication that involves obtaining configuration information for sidelink positioning reference signals, transmitting sidelink control information, and data using physical sidelink channels, with priority values aligned for resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sidelink positioning reference signals are transmitted separately from data, then positioning accuracy is improved, but resource allocation complexity and latency increase
Solution Approach 1:
The patent combines sidelink positioning reference signals (SL-PRS) and sidelink data into the same physical sidelink shared channel (PSSCH) resources. The transmitting UE multiplexes both positioning reference signals and data payload within the same time-frequency resources, allowing the receiving UE to perform positioning measurements and data reception simultaneously without requiring separate resource allocations, thereby reducing resource allocation complexity while maintaining positioning accuracy.
2Reliability
If multiple sidelink channels are used for positioning and data, then communication reliability is improved, but transmission latency increases
Solution Approach 1:
The patent merges positioning reference signals and data transmissions into a single PSSCH channel, eliminating the need for separate channel scheduling and reducing the time required for resource allocation and signal transmission. This simultaneous transmission approach maintains communication reliability through proper signal separation at the receiver while minimizing transmission latency.
3Adaptability or versatility
If priority values for positioning signals and data are different, then resource scheduling flexibility is improved, but resource allocation overhead increases
Solution Approach 1:
The patent applies the same priority value to both positioning reference signals and data transmissions. By using uniform priority values, the system simplifies resource allocation procedures and reduces signaling overhead while maintaining the ability to schedule both positioning and data transmissions efficiently within the same resource pool, thereby reducing resource allocation overhead while preserving scheduling flexibility.
Data Source
AI summary
Provided are a method for a first device to perform wireless communication and a device supporting same. The method may comprise the steps of: acquiring configuration information related to a sidelink (SL) positioning reference signal (PRS) for SL-based positioning; transmitting first sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) and second SCI to a second device through a physical sidelink control channel (PSCCH); and transmitting the second SCI, SL data, and a first SL PRS to the second device on the basis of a resource related to the PSSCH. For example, the priority value of the transmission of the first SL PRS may be the same as that of the transmission of the SL data.