Sidelink Resource Indication via Shared Sets

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Solution Overview

Problem

In NR-V2X communication, multiple terminal devices may select the same time-frequency resources due to lack of coordination, leading to half-duplex limitations and mutual interference during resource selection and reselection.

Innovation Solution

A method where a first terminal device transmits a shared resource set to a second terminal device through first signaling, allowing the second terminal device to reference these resources during its own resource selection, thereby reducing the probability of resource collisions and half-duplex limitations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple terminal devices independently select time-frequency resources without coordination, then resource allocation flexibility is improved, but resource collision probability increases

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidresource collision probability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

Terminal devices perform channel sensing and detect resources already occupied by other devices before selecting transmission resources. This feedback mechanism allows devices to adjust their resource selection based on channel conditions and other devices' transmissions, reducing resource collisions while maintaining allocation flexibility

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

A resource indication message is introduced as an intermediary between terminal devices. The first terminal device transmits resource indication information to the second terminal device, which then uses this information to adjust its resource selection. This intermediary mechanism coordinates resource selection without requiring centralized control, resolving the contradiction between flexibility and collision probability

Inventive Principle:

Principle #24Intermediary (Mediator)

2Speed

If terminal devices trigger resource selection at the same time point, then resource selection speed is improved, but mutual interference increases

Engineering Contradiction:

Improveresource selection speedVSAvoidmutual interference

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

Terminal devices perform channel sensing and resource detection before triggering resource selection. This preliminary action allows devices to identify available resources and avoid selecting resources that will cause or experience interference, enabling faster resource selection without mutual interference

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Devices use channel sensing feedback to determine optimal resource selection timing and resources. By continuously monitoring the channel and adjusting resource selection based on detected interference conditions, devices can trigger resource selection simultaneously when necessary while avoiding mutual interference through informed decision-making

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12295007B2Method for resource indication and terminal device

Publication Date: 2025.05.06 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

Methods for resource indication and a terminal device are provided in implementations of the disclosure. The method includes the following. A first terminal device transmits a shared resource set to a second terminal device through first signaling, where the shared resource set indicates transmission resources for sidelink (SL) communication.