Sidelink Failure Detection Through Reference Signal and Packet Status

Solution Overview

Problem

In sidelink communication, terminals cannot determine the link state, leading to continued transmission attempts when a failure occurs, affecting performance and wasting resources.

Innovation Solution

A method and terminal for detecting sidelink failure by transmitting reference signals or data packets and evaluating their transmission status against preset criteria to determine if link failure has occurred.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If terminals continue transmission attempts without determining link state, then transmission continuity is maintained, but resource waste increases and transmission performance deteriorates

Engineering Contradiction:

Improvetransmission performanceVSAvoidresource waste

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The patent implements feedback mechanisms where terminals monitor transmission status and provide information about link quality. The transmitting terminal monitors whether received data packets meet quality criteria, and the receiving terminal monitors whether transmitted reference signals are successfully received. This feedback enables both terminals to detect link failures and stop unnecessary transmissions, resolving the contradiction between maintaining transmission continuity and avoiding resource waste.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent enables terminals to autonomously detect and respond to link failures without continuous network device intervention. Terminals self-monitor transmission status, self-determine link failure conditions, and self-adjust transmission behavior by stopping transmissions when failures are detected. This self-service capability allows terminals to optimize resource usage while maintaining transmission performance.

Inventive Principle:

Principle #25Self-service

2Adaptability or versatility

If terminals autonomously select resources for sidelink transmission, then transmission flexibility is improved, but link state monitoring capability deteriorates

Engineering Contradiction:

Improvetransmission flexibilityVSAvoidlink state determination capability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements feedback mechanisms where terminals monitor transmission status and provide information about link quality. The transmitting terminal monitors whether received data packets meet quality criteria, and the receiving terminal monitors whether transmitted reference signals are successfully received. This feedback enables both terminals to detect link failures and stop unnecessary transmissions, resolving the contradiction between maintaining transmission continuity and avoiding resource waste.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent enables terminals to autonomously detect and respond to link failures without continuous network device intervention. Terminals self-monitor transmission status, self-determine link failure conditions, and self-adjust transmission behavior by stopping transmissions when failures are detected. This self-service capability allows terminals to optimize resource usage while maintaining transmission performance.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12363783B2Method for detecting link failure of sidelink and terminal

Publication Date: 2025.07.15 VIVO MOBILE COMM CO LTD

AI summary

This disclosure discloses a method for detecting link failure of a sidelink and a terminal. The method includes: transmitting target information through a sidelink, where the target information includes a first reference signal or a data packet; and determining, if a transmission status of the target information meets a preset criterion, that no link failure occurs on the sidelink, and determining, if otherwise, that link failure occurs on the sidelink.