Sidelink COT Sharing via SCI for Unlicensed Spectrum Access
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Solution Overview
Problem
There is no related design for channel occupancy time (COT) sharing indication information on the sidelink of unlicensed spectrum resources, which hinders the effective implementation of a COT sharing mechanism.
Innovation Solution
A communication method and apparatus that enables COT sharing on the sidelink by using priority thresholds and indication information to determine and share resources, including priority thresholds, resource information, and PSFCH licensing, reducing overheads and ensuring efficient resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If COT sharing indication information is added to enable COT sharing on sidelink, then resource utilization and system performance are improved, but message overhead increases
Solution Approach 1:
The patent combines the COT sharing indication function with the existing SCI (Sidelink Control Information) structure. The indication information is integrated into the SCI format rather than being transmitted as a separate message, thereby enabling COT sharing functionality while avoiding additional message overhead.
Solution Approach 2:
The SCI structure serves multiple functions: it conveys traditional sidelink control information and simultaneously carries COT sharing indication information. This multi-functional approach allows the same message structure to achieve both existing control purposes and new COT sharing capabilities without requiring separate dedicated messages.
2Manufacturing precision
If detailed COT sharing indication information is transmitted, then resource allocation accuracy is improved, but processing complexity increases
Solution Approach 1:
The COT sharing indication information is segmented into key essential elements (such as COT duration, resource allocation indicators, and priority information) rather than transmitting complete detailed information. This segmentation approach maintains sufficient accuracy for resource allocation while reducing the overall information volume and processing complexity.
Solution Approach 2:
The patent transmits only the necessary partial information required for COT sharing decision-making, rather than all possible detailed parameters. This partial action approach provides sufficient accuracy for proper resource allocation while avoiding the complexity of processing unnecessary detailed information.
Data Source
AI summary
This application provides a communication method and apparatus that may be applied to resource sharing in channel occupancy time in sidelink communication. The method includes: A first terminal apparatus determines first channel occupancy time COT. The first terminal apparatus determines to share a first resource based on a preset priority threshold, where a time domain position of the first resource is in the first COT. The first terminal apparatus sends first indication information to at least one second terminal apparatus, where the first indication information is for sharing the first COT, and the first indication information includes one or more of the priority threshold, resource information of the first COT, and sharing and licensing information of a PSFCH resource in the first COT. According to the method, COT sharing of an unlicensed spectrum resource can be implemented on a sidelink.