Anchor UE Selection by Distance and RSRP in Sidelink Positioning

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Solution Overview

Problem

In sidelink communication systems, there is no effective method for determining an anchor UE for transmitting positioning-related information, leading to unreliable UE location determination and communication reliability issues.

Innovation Solution

A method for a first terminal to autonomously determine whether it can serve as an anchor UE by evaluating target parameters based on information received from target terminals and comparing them against set restriction conditions, including distance, RSRP, and included angles, to reduce interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a target terminal sends positioning-related information to multiple anchor UEs, then the positioning information can be transmitted, but interference is generated between anchor UEs

Engineering Contradiction:

Improvepositioning information transmissionVSAvoidinterference between anchor UEs

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent applies local quality by determining whether each terminal should function as an anchor UE based on its specific local conditions (target parameters such as distance, signal strength, and angle). Not all terminals are designated as anchor UEs uniformly; instead, the anchor UE status is assigned selectively to terminals that meet specific restriction conditions, thereby reducing interference while maintaining positioning functionality.

Inventive Principle:

Principle #3Local quality

2Device complexity

If a UE autonomously determines anchor UE status, then the system complexity is reduced, but the determination accuracy may be insufficient without centralized control

Engineering Contradiction:

Improveanchor UE determination systemVSAvoidanchor UE determination accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent implements self-service by enabling terminals to autonomously determine their own anchor UE status based on pre-configured restriction conditions and measured target parameters. Each terminal independently evaluates whether it meets the criteria to become an anchor UE, eliminating the need for complex centralized determination systems while maintaining determination accuracy through objective parameter comparison.

Inventive Principle:

Principle #25Self-service

3Object-generated harmful factors

If restriction conditions are set for anchor UE determination, then interference is reduced, but the flexibility of anchor UE selection is limited

Engineering Contradiction:

Improveinterference between anchor UEsVSAvoidanchor UE selection flexibility

Core Design Contradiction:

Object-generated harmful factorsVSAdaptability or versatility

Solution Approach 1:

The patent applies dynamics by making the anchor UE status configurable and adjustable. The restriction conditions and target parameters can be modified based on different deployment scenarios and requirements. Terminals can dynamically transition between anchor UE and non-anchor UE status as conditions change, providing both interference reduction through restrictions and flexibility through configurability.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12581454B2Anchor terminal determination method, information sending method, communication node, and storage medium

Publication Date: 2026.03.17 ZTE CORP

AI summary

Provided are an anchor terminal determination method, an information sending method, a communication node, and a storage medium. The anchor terminal determination method includes receiving information sent by a target terminal, determining a target parameter according to the information sent by the target terminal, and determining that the first terminal is an anchor terminal in a case where the target parameter satisfies a set restriction condition.