PSFCH Resource Mapping for LBT Failures in Unlicensed Spectrum
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Solution Overview
Problem
When sidelink communication is applied to unlicensed spectrum, some Physical Sidelink Feedback Channels (PSFCHs) cannot be transmitted due to limitations in Listen Before Talk (LBT) restrictions.
Innovation Solution
The method involves sending PSFCH on at least one PSFCH resource corresponding to a channel bandwidth where LBT is successfully performed, with each channel bandwidth corresponding to multiple PSFCH resources, thereby increasing the number of available PSFCH resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LBT is performed on each channel bandwidth separately, then the probability of PSFCH transmission failure decreases, but the complexity of resource management increases
Solution Approach 1:
The patent segments the Bandwidth Part (BWP) into multiple channel bandwidths, where each channel bandwidth corresponds to one or more PSFCH resources. This segmentation allows independent LBT performance for each channel bandwidth, increasing the probability of successful PSFCH transmission while maintaining manageable complexity through structured resource mapping.
2Quantity of substance
If multiple channel bandwidths are mapped to PSFCH resources, then the number of available PSFCH resources increases, but the overhead for configuring and managing these resources increases
Solution Approach 1:
The patent establishes a universal mapping relationship where each channel bandwidth within a BWP corresponds to one or more PSFCH resources. This multi-functional mapping allows a single configuration mechanism to manage multiple channel bandwidths and their associated PSFCH resources, increasing the number of available resources without proportionally increasing configuration overhead.
Data Source
AI summary
A Physical Sidelink Feedback CHannel (PSFCH) sending method and apparatus, and a readable storage medium are provided. The method includes: sending PSFCH on at least one PSFCH resource corresponding to at least one channel bandwidth where LBT is successfully performed, where the at least one channel bandwidth where LBT is successfully performed corresponds to a same Bandwidth Part (BWP), and the BWP corresponds to a plurality of channel bandwidths each of which corresponds to one or more PSFCH resources.