D2D Resource Allocation Through Coordinating Relay UEs

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Solution Overview

Problem

In device-to-device (D2D) communication, resource collisions and transmission failures occur due to uncoordinated resource selection by user equipment (UEs) in autonomous selection mode, leading to inefficiencies and delays, especially when UEs are out of network coverage.

Innovation Solution

A UE, acting as a relay, coordinates resource allocation for D2D transmissions by selecting or requesting resources from a base station, minimizing collisions and extending resource allocation periods to reduce signaling overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If UEs select resources autonomously without coordination, then device complexity and signaling overhead are reduced, but resource collisions and transmission failures increase

Engineering Contradiction:

Improveresource selection complexityVSAvoidtransmission reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

A coordinating UE is introduced as an intermediary between multiple UEs selecting resources autonomously. This mediator collects resource selection information from various UEs and generates coordinated resource allocation decisions, thereby reducing collisions while maintaining relative simplicity in the autonomous selection process.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system implements feedback mechanisms where UEs provide information about their selected resources to the coordinating UE, and the coordinating UE sends back allocation decisions. This feedback loop enables collision avoidance while maintaining autonomous selection capabilities.

Inventive Principle:

Principle #23Feedback

2Loss of energy

If resource allocation periods are extended, then signaling overhead is reduced, but resource allocation flexibility and responsiveness decrease

Engineering Contradiction:

Improvesignaling overheadVSAvoidresource allocation period

Core Design Contradiction:

Loss of energyVSDuration of action of moving object

Solution Approach 1:

The system performs preliminary resource allocation for a duration period in advance, reducing the need for frequent signaling updates. Resources are allocated for extended periods when conditions are stable, and only reallocated when necessary, thereby reducing signaling overhead while maintaining flexibility through periodic reviews.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If UEs operate out of network coverage in autonomous mode, then network dependency is reduced, but coordination capability and collision avoidance deteriorate

Engineering Contradiction:

Improveoperational flexibilityVSAvoidcollision avoidance capability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

UEs operating out of network coverage perform self-service by autonomously selecting resources based on pre-configured parameters and local coordination. The autonomous selection mode enables UEs to operate independently while still maintaining collision avoidance through distributed decision-making and resource pool management.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12439422B2Allocating resources for a device-to-device transmission

Publication Date: 2025.10.07 MALIKIE INNOVATIONS LTD

AI summary

A method for allocating resources for device-to-device transmission between two or more user equipment (UEs) includes transmitting, from a first UE to a second UE, a resource allocation configuration for device-to-device communications. A resource request for a device-to-device transmission is received from the second UE. In response to the resource request, a resource for the device-to-device transmission is selected at the first UE. A resource grant is transmitted to the second UE. The resource grant identifies the selected resource. A device-to-device transmission is received from the second UE over the selected resource.