Sidelink PRS Multiplexing in Shared Slots for Accurate Positioning

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Solution Overview

Problem

The refinement of how Sidelink Positioning Reference Signals (SL PRS) and other physical channels are transmitted in a multiplexed manner within the sidelink communication system is required to improve positioning accuracy.

Innovation Solution

The SL PRS and physical channels, such as Physical Sidelink Control Channel (PSCCH) and/or Physical Sidelink Shared Channel (PSSCH), share a resource pool and are transmitted in a multiplexed manner in the same slot.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If SL PRS and physical channels are transmitted in a multiplexed manner in the same slot, then positioning accuracy is improved, but signal interference increases

Engineering Contradiction:

Improvepositioning accuracyVSAvoidsignal interference

Core Design Contradiction:

Measurement precisionVSObject-generated harmful factors

Solution Approach 1:

The time slot is segmented into different regions: some symbols are allocated for SL PRS transmission while other symbols are allocated for physical channel transmission. This time-domain segmentation allows both signals to coexist without overlapping, thereby improving positioning accuracy while avoiding signal interference.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent transitions from frequency-division multiplexing to time-division multiplexing, changing the dimension in which resources are allocated. By using time-domain symbols instead of frequency resources, the system achieves better positioning accuracy through dedicated PRS resources while preventing interference through temporal separation.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Productivity

If SL PRS and physical channels share a resource pool, then resource utilization efficiency is improved, but transmission reliability deteriorates

Engineering Contradiction:

Improveresource utilization efficiencyVSAvoidtransmission reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The shared resource pool is segmented in the time domain, with specific symbols dedicated to SL PRS and other symbols dedicated to physical channels. This segmentation maintains high resource utilization by sharing the frequency spectrum while ensuring transmission reliability through dedicated time resources for each signal type.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically allocates time-domain symbols within the shared resource pool, allowing flexible configuration of SL PRS and physical channel positions based on traffic requirements. This dynamic time-domain allocation optimizes resource utilization while maintaining reliable transmission through proper symbol assignment.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250358073A1Sidelink transmission method, terminal, and computer-readable storage medium

Publication Date: 2025.11.20 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

A sidelink transmission method, and a terminal and storage medium are provided. The method includes: a terminal sends or receives a Sidelink Positioning Reference Signal (SL PRS) and a physical channel, the physical channel comprising a Physical Sidelink Control Channel (PSCCH) and/or a Physical Sidelink Shared Channel (PSSCH), the SL PRS and the physical channel sharing a resource pool, and the SL PRS and the physical channel being multiplexed and transmitted in the same slot.