Sidelink Positioning Signal Multiplexing With SCI Resource Mapping
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Solution Overview
Problem
Current wireless communication systems lack efficient methods for sidelink-based positioning, particularly in 5G and beyond systems, which are essential for applications such as V2X and IIoT, where precise positioning is required for enhanced services and device connectivity.
Innovation Solution
A method involving user equipment (UE) transmitting and receiving Sidelink Positioning Reference Signals (SL PRS) and Sidelink Control Information (SCI) based on configured resources, allowing for multiplexing of SL PRSs on shared time-frequency resources and determining resource allocations through specific configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SL PRSs are multiplexed on shared time-frequency resources, then resource utilization efficiency is improved, but measurement precision and positioning accuracy deteriorate due to signal interference
Solution Approach 1:
The patent divides the time-frequency resource into multiple slots, where each slot contains multiple subchannels. Within each subchannel, SL PRSs from different UEs are multiplexed in the time domain across different slots, while control information is transmitted in the frequency domain. This segmentation allows efficient resource utilization while maintaining positioning accuracy through structured multiplexing.
Solution Approach 2:
The patent introduces Sidelink Control Information (SCI) as an intermediary element that carries resource allocation details. The SCI indicates the resource configuration for SL PRS transmission, enabling receiving UEs to properly decode the multiplexed signals. This intermediary mechanism facilitates efficient resource sharing while maintaining signal integrity for positioning measurements.
2Device complexity
If SL PRS transmission resources are determined based on configuration and correspondence relationships, then device complexity is reduced, but adaptability to dynamic positioning scenarios deteriorates
Solution Approach 1:
The patent establishes a dynamic correspondence relationship between control information and physical resources. The mapping between SCI and SL PRS resources is configured based on actual transmission needs, allowing the system to adapt to different positioning scenarios. This dynamic configuration mechanism maintains simplicity in resource determination while providing versatility in handling various positioning requirements.
Solution Approach 2:
The patent employs parameter-based resource determination where configuration parameters define the mapping between control information and physical resources. By changing these parameters based on scenario requirements, the system achieves adaptability without increasing device complexity. The parameter configuration allows flexible adjustment of resource allocation for different positioning needs.
3Productivity
If multiple SL PRSs are multiplexed on the same subchannel, then productivity is improved, but harmful interference between signals increases
Solution Approach 1:
The patent segments the time-frequency resource into multiple slots and subchannels. Within each subchannel, multiple SL PRSs are multiplexed across different time slots, while control information is transmitted in the frequency domain. This segmentation reduces signal interference by separating PRS transmissions in the time domain while maintaining high multiplexing capacity through efficient resource utilization.
Solution Approach 2:
The patent implements periodic transmission patterns where SL PRSs are transmitted in alternating time slots. This periodic action allows multiple signals to share the same frequency resource without simultaneous transmission, reducing interference while maintaining productivity. The periodic structure enables systematic multiplexing of multiple PRSs with minimal mutual interference.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure discloses a method and a device in a wireless communication system. This document provides a method performed by a first user terminal UE in a wireless communication system, comprising: acquiring by the first UE a configuration related to a Sidelink Positioning Reference Signal (SL PRS); and transmitting by the first UE the SL PRS and Sidelink Control Information (SCI) associated with the SL PRS to a second UE based on the configuration related to the SL PRS; wherein a resource used to transmit the SL PRS is determined based on the configuration related to the SL PRS, and/or a resource correspondence between SL PRS resources and PSCCH, and a determined PSCCH resource; and/or wherein a PSCCH resource used to transmit the SCI is determined based on a related configuration of a PSCCH associated with the SL PRS, and/or the resource correspondence between the SL PRS and the PSCCH, and a determined resource used to transmit the SL PRS.