Sidelink Relay Discovery Pool for Low-Interference UE Selection

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Solution Overview

Problem

There is a need for improved techniques in wireless communication systems, particularly in NR and LTE technologies, to enhance feedback signaling and relay discovery for efficient communication between user equipment and base stations, especially in scenarios where direct communication is challenging.

Innovation Solution

The implementation of a configuration mechanism for resource allocation among relay UEs to facilitate discovery operations, allowing remote UEs to connect with suitable relay UEs and relay communications, with mechanisms for radio link measurements and reselection based on signal quality, and the use of common and dedicated resource pools for discovery and communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If relay discovery resources are allocated for multiple relay UEs, then relay selection capability is improved, but resource collision and interference increase

Engineering Contradiction:

Improverelay selection capabilityVSAvoidresource collision and interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The discovery resources are segmented into different types (first type for in-coverage relay UEs, second type for out-of-coverage relay UEs). This segmentation allows relay UEs to select appropriate resources based on their coverage status, reducing resource collisions and interference while maintaining relay selection capability.

Inventive Principle:

Principle #1Segmentation

2Ease of operation

If common discovery resources are used by all relay UEs, then resource allocation simplicity is improved, but relay discovery performance deteriorates

Engineering Contradiction:

Improveresource allocation simplicityVSAvoidrelay discovery performance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

Different discovery resources are assigned based on the local conditions of relay UEs (in-coverage vs. out-of-coverage). This local quality approach ensures that each relay UE uses resources appropriate to its operational context, improving discovery performance while maintaining allocation simplicity through clear coverage-based differentiation.

Inventive Principle:

Principle #3Local quality

3Measurement precision

If relay UEs perform frequent discovery operations, then relay selection accuracy is improved, but signaling overhead and latency increase

Engineering Contradiction:

Improverelay selection accuracyVSAvoiddiscovery latency

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

Relay discovery operations are performed periodically using configured discovery resources. This periodic action allows relay UEs to maintain accurate selection capability while managing signaling overhead and latency through structured, interval-based discovery rather than continuous operations.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS12532365B2Relay discovery pool for sidelink

Publication Date: 2026.01.20 QUALCOMM INC

AI summary

Certain aspects provide a method for wireless communication by a user-equipment (UE). The method generally includes determining a configuration of resources for discovery of a relay UE of a plurality of relay UEs, wherein the resources are used by each of the plurality of relay UEs for communication of one or more discovery messages, performing discovery operations to connect with the relay UE in accordance with the configuration, and communicating with a base station through the relay UE after connecting with the relay UE.