Sidelink LBT Failure Reporting Across Multiple RB Sets

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Solution Overview

Problem

Existing wireless communication systems face challenges in managing Listen Before Talk (LBT) failures in resource block sets, particularly in unlicensed bands, which can lead to inefficiencies and disruptions in sidelink (SL) communication, especially in vehicle-to-everything (V2X) scenarios.

Innovation Solution

A method and device for performing wireless communication that involves obtaining information about multiple resource block sets, conducting a listen before talk (LBT) procedure, and transmitting first LBT failure reporting information to a second device upon failure in a first RB set, facilitating improved communication management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If LBT procedure is performed for each RB set independently, then channel access reliability is improved, but communication overhead and processing complexity increase

Engineering Contradiction:

Improvechannel access reliabilityVSAvoidprocessing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent divides the resource blocks into multiple RB sets and performs LBT procedure independently for each RB set. This segmentation allows parallel channel access attempts across different frequency resources, improving overall channel access reliability while maintaining manageable processing complexity through structured organization of LBT operations.

Inventive Principle:

Principle #1Segmentation

2Reliability

If LBT failure reporting is implemented for each RB set, then communication reliability is improved, but signaling overhead increases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent combines LBT failure reporting from multiple RB sets into a unified report structure. Instead of treating each RB set's failure independently with separate signaling, the system merges the failure information across RB sets, reducing redundant signaling overhead while maintaining the reliability benefits of comprehensive failure reporting.

Inventive Principle:

Principle #5Merging (Combining)

3Productivity

If multiple RB sets are monitored for LBT, then channel utilization efficiency is improved, but time consumption for LBT procedure increases

Engineering Contradiction:

Improvechannel utilization efficiencyVSAvoidtime consumption

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent performs LBT procedure preliminarily for multiple RB sets before actual data transmission. By conducting these LBT checks in advance and organizing them efficiently, the system identifies available channels beforehand, improving channel utilization efficiency while minimizing the time impact through optimized LBT scheduling and execution.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20260089758A1Method and device for operating terminal report during LBT failure in SL-u

Publication Date: 2026.03.26 LG ELECTRONICS INC

AI summary

A method by which a first device performs wireless communication, and a device for supporting same are provided. The method may comprise the steps of: acquiring information related to a plurality of resource block (RB) sets; performing listen before talk (LBT); and transmitting, to a second device, LBT failure reporting information on the basis of an LBT failure about a first RB set.