Sidelink Feedback Resource Sets for Stable COT Communication
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Solution Overview
Problem
In sidelink communication systems, the waste of feedback resources and potential interruption of channel occupancy time (COT) occur when a physical sidelink feedback channel (PSFCH) resource is not utilized, leading to inefficiencies and interruptions in communication.
Innovation Solution
A method where a terminal device sends at least one piece of feedback information on each resource block set within a channel occupancy time (COT), prioritizing feedback information with the highest priority and optimizing resource utilization to avoid resource wastage and COT interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a terminal device does not send feedback information on all configured PSFCH resources, then resource utilization is improved, but feedback information completeness deteriorates
Solution Approach 1:
The patent segments feedback information into multiple priority levels (first priority, second priority, etc.) and divides PSFCH resources into corresponding resource sets. The terminal device selectively transmits feedback information based on priority levels, ensuring high-priority feedback is transmitted while lower-priority feedback may be omitted when resources are limited. This segmentation approach resolves the contradiction by allowing partial feedback transmission that prioritizes critical information over complete transmission of all feedback.
2Loss of information
If a terminal device sends feedback information on all PSFCH resources, then feedback information completeness is improved, but resource waste increases
Solution Approach 1:
The patent applies local quality by assigning different transmission qualities to different feedback information based on their priority levels. High-priority feedback information is transmitted on dedicated PSFCH resources with higher reliability, while lower-priority feedback may use shared resources or be omitted. This allows the system to optimize resource usage by matching transmission quality to information importance, reducing overall resource waste while maintaining essential feedback completeness.
3Speed
If a terminal device preempts a channel in a first time unit, then channel access speed is improved, but COT stability deteriorates
Solution Approach 1:
The patent implements preliminary action by requiring terminal devices to perform Listen-Before-Talk (LBT) procedures and obtain Channel Occupancy Time (COT) permissions before preempting channels. The COT mechanism reserves channel access rights for a predetermined time period, allowing terminal devices to rapidly access channels within their allocated COT while preventing unauthorized preemptions. This preliminary reservation of channel rights resolves the contradiction by enabling fast channel access for authorized devices while maintaining overall COT stability through structured channel management.
Data Source
AI summary
This application provides a sidelink communication method and apparatus. According to this application, if a first terminal device receives a plurality of pieces of data on a plurality of resource block sets, and resources for feedback information corresponding to the plurality of pieces of data are located in the plurality of resource block sets and a first time unit, the first terminal device sends, in the first time unit and on each of the plurality of resource block sets, feedback information corresponding to at least one of the plurality of pieces of data.