Wireless LBT Counter Handling Across RB Sets Without Guard Bands
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing listen before talk (LBT) failures, particularly in resource block (RB) sets, which affect communication reliability and efficiency.
Innovation Solution
A method and device for wireless communication that increment LBT counters for different RB sets based on LBT failure detection, including configuring guard bands when necessary, to manage and mitigate consistent LBT failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If LBT counter is incremented for each RB set experiencing LBT failure, then LBT failure detection accuracy is improved, but false detection between adjacent RB sets increases
Solution Approach 1:
The patent segments the LBT failure detection process by introducing a guard band configuration check between RB sets. The LBT counter is segmented to only increment when failures occur in RB sets separated by guard bands, preventing false propagation of failure counts to adjacent RB sets without physical separation.
Solution Approach 2:
The guard band acts as an intermediary element between RB sets. The patent uses the presence or absence of guard band configuration as a mediating condition that determines whether LBT failure detection should be propagated to neighboring RB sets, thereby preventing false detections while maintaining accurate detection where appropriate.
2Area of stationary object
If LBT counter increments for adjacent RB sets without guard band, then coverage area is improved, but communication reliability deteriorates due to false failure detection
Solution Approach 1:
The patent applies local quality by making the LBT counter increment behavior dependent on the local configuration between RB sets. When a guard band is configured, the local quality allows failure detection propagation; when no guard band is configured, the local quality prevents false propagation, thus maintaining communication reliability while preserving coverage area.
3Measurement precision
If guard band is configured between RB sets, then LBT failure detection accuracy is improved, but frequency resource utilization decreases
Solution Approach 1:
The system uses the existing guard band configuration (when present) to serve the dual purpose of frequency separation and LBT failure detection boundary marking. The guard band's primary function of preventing interference automatically provides a natural boundary for accurate LBT failure detection, eliminating the need for additional detection mechanisms.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method for performing wireless communication by a first device, and a device for supporting same are provided The method may comprise the steps of: obtaining information relating to the maximum number of counts by which a listen-before-talk (LBT) failure has been detected; and on the basis that an LBT counter has a value greater than or equal to the maximum number of counts by which the LBT failure has been detected, continuously detecting the LBT failure. For example, on the basis that information about an LBT failure for a first resource block (RB) set is obtained, a first LBT counter may be incremented by a value of 1 for the first RB set. For example, on the basis that the first LBT counter is incremented by a value of 1 for the first RB set and that no guard band is configured between RB sets, a second LBT counter may be incremented by a value of 1 for a second RB set that is an RB set different from the first RB set.