Trigger Signaling for Resource Selection in NR-V2X

Solution Overview

Problem

Current D2D direct communication methods in NR-V2X face challenges such as hidden node problems, half-duplex limitations, exposed terminal issues, and high power consumption during resource selection, which affect system performance and reliability.

Innovation Solution

A wireless communication method where a first terminal determines whether to transmit trigger signaling to a second terminal based on conditions such as delay requirements, and uses either a sidelink grant or an exceptional resource pool to transmit the signaling, allowing the second terminal to provide assistance information for resource selection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If terminals transmit assistance information continuously to help with resource selection, then resource selection accuracy is improved, but power consumption increases and system efficiency deteriorates

Engineering Contradiction:

Improveresource selection accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic resource selection listening where terminals perform resource selection operations at specific intervals rather than continuously. The network device configures a listening window period, and terminals only transmit assistance information and perform resource selection during these periodic intervals, reducing power consumption while maintaining adequate resource selection accuracy.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

Terminals autonomously determine whether to transmit assistance information based on locally evaluated conditions such as buffer status, channel conditions, and priority levels. This self-service mechanism eliminates the need for continuous network-controlled assistance information transmission, reducing overall system power consumption while maintaining resource selection accuracy when needed.

Inventive Principle:

Principle #25Self-service

2Reliability

If terminals perform resource selection listening continuously, then resource selection reliability is improved, but spectral efficiency deteriorates due to unnecessary transmissions

Engineering Contradiction:

Improveresource selection reliabilityVSAvoidspectral efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent implements periodic resource selection listening where terminals perform resource selection operations at specific intervals rather than continuously. The network device configures a listening window period, and terminals only transmit assistance information and perform resource selection during these periodic intervals, reducing power consumption while maintaining adequate resource selection accuracy.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

Terminals autonomously determine whether to transmit assistance information based on locally evaluated conditions such as buffer status, channel conditions, and priority levels. This self-service mechanism eliminates the need for continuous network-controlled assistance information transmission, reducing overall system power consumption while maintaining resource selection accuracy when needed.

Inventive Principle:

Principle #25Self-service

3Loss of information

If terminals transmit assistance information in all situations, then resource selection completeness is improved, but system overhead increases and performance deteriorates

Engineering Contradiction:

Improveresource selection completenessVSAvoidsystem performance

Core Design Contradiction:

Loss of informationVSProductivity

Solution Approach 1:

Terminals autonomously determine whether to transmit assistance information based on locally evaluated conditions such as buffer status, channel conditions, and priority levels. This self-service mechanism eliminates the need for continuous network-controlled assistance information transmission, reducing overall system power consumption while maintaining resource selection accuracy when needed.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Different terminals transmit assistance information with different frequencies and contents based on their local conditions. Terminals with urgent data, poor channel conditions, or high priority traffic transmit more frequently and with more detailed information, while terminals in good conditions transmit less. This local quality approach ensures resource selection completeness is maintained where needed while optimizing overall system performance.

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP4258698B1Wireless communication method, and terminal

Publication Date: 2025.02.12 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

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AI summary

The embodiments of the present disclosure provide a wireless communication method and a terminal. The method includes: determining, by a first terminal, whether the first terminal satisfies a condition for transmitting trigger signaling, the trigger signaling instructing a second terminal to transmit assistance information for assisting the first terminal in resource selection; and transmitting, by the first terminal, the trigger signaling when the first terminal satisfies the condition for transmitting the trigger signaling. When the first terminal satisfies the condition for transmitting the trigger signaling, the first terminal transmits the trigger signaling, i.e., to trigger the transmission of the trigger signaling based on the condition. It is possible to support transmission of the trigger signaling in a variety of different situations, so as to avoid unnecessary transmission of assistance information by the second terminal, thereby improving the overall performance of the entire system.