U2U Relay Request Signaling for Direct UE Connectivity

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Solution Overview

Problem

Existing wireless communication systems face challenges in establishing direct communication between User Equipments (UEs) when a Sidelink cannot be established, necessitating the development of methods for UE to UE (U2U) relay communication to facilitate connectivity.

Innovation Solution

A method involving a source UE broadcasting a request message with destination and relay information to discover candidate U2U relays, and a monitoring device updating target UE information based on relay capabilities, enabling U2U relay communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a source UE broadcasts a request message to discover candidate U2U relays, then UE connectivity is improved, but signaling overhead increases

Engineering Contradiction:

ImproveUE connectivityVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The source UE includes relay information indicating its capability to act as a target UE in the initial request message. This preliminary action allows monitoring devices to proactively identify suitable relay candidates without requiring additional confirmation messages, thereby reducing signaling overhead while ensuring reliable connectivity.

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If monitoring devices add UEs to target UE information based on request messages, then relay communication is facilitated, but incorrect UEs may be added to target UE information

Engineering Contradiction:

Improverelay communication setupVSAvoidaccuracy of target UE information

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The request message includes relay information that provides feedback about the source UE's capability to act as a target UE. Monitoring devices use this feedback information to accurately determine whether to add the source UE to their target UE information, preventing incorrect additions while facilitating proper relay communication setup.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If relay information is included in the request message, then the accuracy of target UE information is improved, but the message size increases

Engineering Contradiction:

Improveaccuracy of target UE informationVSAvoidmessage size

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent extracts only the essential relay information (capability to act as target UE) from the full set of possible UE parameters and includes only this extracted information in the request message. This selective extraction maintains accuracy of target UE information while minimizing the increase in message size.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20260059590A1Information processing methods and apparatuses, communication device and storage medium

Publication Date: 2026.02.26 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A method for processing information is performed by a source User Equipment (UE). The method includes: broadcasting a request message, wherein the request message includes destination information and relay information of the source UE; wherein the destination information is configured to indicate a candidate User Equipment to User Equipment (U2U) relay of the source UE; and the relay information of the source UE is configured to indicate whether the source UE is capable of acting as a target UE for U2U relay communication.