Multi-TRP Sidelink Positioning for Congested 5G Networks

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Solution Overview

Problem

Existing wireless communication networks face challenges in accurately determining the positioning of user equipment (UEs) in dynamic systems, particularly in intelligent transport systems, due to increased interference and network congestion, especially with the introduction of 5G networks and devices with multiple transmission and reception points (TRPs).

Innovation Solution

Implementing multi-TRP based sidelink (SL) positioning techniques, where UEs exchange requests and responses to determine available TRPs for positioning sessions, enabling accurate range and location determination using positioning reference signals (PRSs) and measurement information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If multi-TRP based positioning is implemented in dynamic systems, then positioning accuracy is improved, but network congestion and overhead increase

Engineering Contradiction:

Improvepositioning accuracyVSAvoidnetwork overhead

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The positioning function is segmented into multiple TRPs distributed across the network. Each TRP independently transmits positioning reference signals and processes measurements, dividing the complex positioning task into manageable segments that can be performed in parallel, improving accuracy without proportionally increasing overall system overhead

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

TRPs are designed to perform multiple functions: they transmit positioning reference signals for positioning measurements, transmit data signals for communication, and provide interference coordination. This multi-functionality allows the same infrastructure to support both positioning and communication without proportionally increasing network overhead

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If multiple TRPs are used for positioning, then positioning accuracy is improved, but interference from neighbor base stations increases

Engineering Contradiction:

Improvepositioning accuracyVSAvoidinterference

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

Each TRP transmits positioning reference signals with locally optimized parameters including specific frequency shifts, time offsets, and signal sequences tailored to its local environment and interference conditions. This allows adjacent TRPs to use different signal characteristics, improving positioning accuracy while managing interference through localized signal design

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent converts interference from neighbor TRPs into a benefit by using multiple TRPs for joint positioning measurements. The interference signals are treated as additional positioning references, allowing the system to resolve positions more accurately by exploiting the spatial diversity and known locations of multiple transmitting TRPs

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Area of stationary object

If positioning is determined in dense networks, then coverage is improved, but network congestion increases

Engineering Contradiction:

Improvenetwork coverageVSAvoidnetwork congestion

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

The network is segmented into multiple TRPs that independently handle positioning operations in their respective coverage areas. Each TRP manages its own positioning reference signal transmissions and measurements, distributing the positioning workload across multiple nodes and reducing central network congestion while extending overall coverage

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Positioning reference signals are transmitted periodically by multiple TRPs in a coordinated manner. This periodic transmission allows UEs to accumulate measurements over multiple periods, improving positioning accuracy in dense networks while the periodic nature prevents continuous resource occupation, managing network congestion

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS20250358064A1Multi-transmission and reception point (multi-TRP) based positioning

Publication Date: 2025.11.20 QUALCOMM INC

AI summary

This disclosure provides systems, methods, and devices for wireless communication that support multiple-transmission and reception point (multi-TRP) based positioning. In some aspects, a method includes transmitting, by a first user equipment (UE) including a first set of transmission and reception points (TRPs), a first request for a first sidelink (SL) positioning session. The first request indicates a multi-TRP positioning session is enabled. The method also includes receiving, from a second UE including a second set of TRPs, a first response based on the first request. The first response indicates a number of TRPs of the second set of TRPs available for the first SL positioning session. Other aspects and features are also claimed and described.