NR Sidelink S-PRS Transmission for Low-Latency V2X Positioning

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently supporting Vehicle-to-Everything (V2X) scenarios such as vehicle platooning, advanced driving, and remote driving, particularly in terms of latency and reliability, and there is a need for improved sidelink (SL) communication to manage increasing data traffic and diverse communication devices.

Innovation Solution

The implementation of Sidelink (SL) communication using NR technology, including the use of Sidelink Positioning Reference Signals (S-PRS) for precise UE location estimation, which enhances SL communication efficiency and supports various V2X scenarios by improving latency and reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If SL communication is implemented to support V2X scenarios, then communication capacity and device support are improved, but latency and reliability challenges arise

Engineering Contradiction:

Improvecommunication capacityVSAvoidlatency and reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent segments the SL communication system into multiple components including S-PRS signal transmission, UE location estimation, and V2X service support. This segmentation allows each component to be optimized independently, enabling the system to handle increased communication capacity while maintaining reliability through dedicated positioning reference signals and location estimation mechanisms

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces S-PRS (Sidelink Positioning Reference Signals) as an intermediary element that facilitates precise UE location estimation. This intermediary signal enables the system to achieve reliable positioning information necessary for V2X scenarios, thereby improving overall system reliability while supporting enhanced communication capacity

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of time

If NR technology is used for SL communication, then latency is reduced, but implementation complexity increases

Engineering Contradiction:

ImprovelatencyVSAvoidimplementation complexity

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The patent utilizes NR technology parameters including specific subcarrier spacing configurations and frame structures for SL communication. By optimizing these parameters, the system achieves reduced latency while managing implementation complexity through standardized parameter sets defined in the NR specification

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If S-PRS is implemented for precise UE location estimation, then positioning accuracy is improved, but signal overhead increases

Engineering Contradiction:

Improvepositioning accuracyVSAvoidsignal overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent implements S-PRS transmission in a partial manner, activating positioning reference signals only when and where needed for V2X scenarios. This selective deployment provides sufficient positioning accuracy for critical applications while minimizing overall signal overhead in the SL communication system

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentEP4054102B1Method and device for transmitting s-PRS in NR v2x

Publication Date: 2026.02.11 LG ELECTRONICS INC

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AI summary

A method for operation of a first device (100) in a wireless communication system is proposed. The method can comprise the steps of: determining a transmission parameter relating to a sidelink positioning reference signal (S-PRS) on the basis of information obtained by means of the first device (100); and transmitting the S-PRS on the basis of the transmission parameter.