Sidelink Assistance Signaling for Resource Overlap Detection

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Solution Overview

Problem

The reliability of sidelink transmission is low due to hardware constraints and scene limitations, and there is no clear method for a receiving terminal to send assistance information to a transmitting terminal for resource selection and transmission parameter adjustment.

Innovation Solution

A method and apparatus for notifying sidelink assistance information, where a first terminal sends assistance information to a second terminal based on trigger conditions or trigger signaling, including demodulation failure, resource overlap detection, or protocol constraints, to improve resource selection and transmission parameter adjustment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If sidelink transmission is performed without assistance information, then the transmission can proceed quickly, but the reliability of sidelink transmission is low

Engineering Contradiction:

Improvereliability of sidelink transmissionVSAvoidcomplexity of assistance information mechanism

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The receiving terminal autonomously generates and sends assistance information to the transmitting terminal based on its own reception status and channel conditions, without requiring external control or coordination. This self-service mechanism enables the system to improve transmission reliability through terminal-initiated feedback, resolving the contradiction between reliability improvement and system complexity

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

A feedback mechanism is established where the receiving terminal sends assistance information back to the transmitting terminal regarding demodulation results, resource detection status, and channel conditions. This feedback loop enables the transmitting terminal to adjust its transmission parameters dynamically, improving reliability while maintaining manageable complexity through standardized feedback formats

Inventive Principle:

Principle #23Feedback

2Reliability

If assistance information is sent continuously, then resource selection and parameter adjustment are optimized, but signaling overhead increases

Engineering Contradiction:

Improveresource selection accuracyVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

Instead of continuous assistance information transmission, the system employs periodic reporting based on trigger conditions such as demodulation failures, resource overlap detection, or predefined time intervals. This periodic action reduces signaling overhead while maintaining resource selection accuracy by providing assistance information only when necessary

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system dynamically adjusts transmission parameters including feedback frequency, information content, and reporting triggers based on channel conditions and transmission requirements. When channel conditions are good, assistance information is reduced or omitted; when conditions deteriorate, more detailed information is transmitted, optimizing the balance between reliability and signaling overhead

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the receiving terminal monitors all transmission resources, then resource overlap detection is improved, but power consumption increases

Engineering Contradiction:

Improveresource overlap detection accuracyVSAvoidpower consumption of receiving terminal

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The receiving terminal performs partial monitoring of transmission resources by focusing on specific resource pools, time-frequency regions, or interference-prone areas rather than monitoring all resources comprehensively. This partial monitoring approach maintains adequate resource overlap detection accuracy while significantly reducing power consumption compared to full-spectrum monitoring

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system performs preliminary resource detection and assessment before actual transmission occurs, allowing the receiving terminal to identify potential resource overlaps in advance. This preliminary action enables the terminal to adjust its monitoring intensity dynamically, maintaining detection accuracy for critical resources while reducing monitoring of less critical resources to conserve power

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12471122B2Method and apparatus for notifying sidelink assistance information, and electronic device

Publication Date: 2025.11.11 VIVO MOBILE COMM CO LTD

AI summary

A method and an apparatus for notifying sidelink assistance information, and an electronic device are provided. The method for notifying sidelink assistance information is performed by a first terminal and includes: sending the sidelink assistance information to a second terminal when a preset trigger condition is satisfied. The trigger condition includes at least one of the following: the first terminal detects a transmission resource reserved by the second terminal; or the first terminal detects that a transmission resource of the second terminal and a transmission resource of the first terminal overlap.