Sidelink COT Sharing With Priority Threshold Signaling
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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 sharing/licensing information of PSFCH, 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 improves, but device complexity and signaling overhead increase
Solution Approach 1:
The patent combines COT sharing indication information with existing sidelink control information (SCI) formats, specifically merging it into SCI format 2-A and 2-B. This allows COT sharing functionality to be implemented without adding separate dedicated signaling channels, thereby improving resource utilization while minimizing additional signaling overhead.
Solution Approach 2:
The patent designs the COT sharing indication information to serve multiple functions: it indicates channel occupancy time sharing, provides priority threshold information for resource selection, and enables both scheduled and autonomous resource access modes. This multi-functionality reduces the need for separate signaling mechanisms for different COT sharing scenarios.
2Reliability
If priority threshold information is included in COT sharing indication, then high-priority service transmission is ensured, but information overhead increases
Solution Approach 1:
The patent applies different priority threshold configurations for different COT sharing scenarios. When a UE shares its COT with another UE, it includes priority threshold information specific to that sharing relationship. This allows high-priority services to be ensured where needed while avoiding unnecessary information overhead in scenarios where priority differentiation is not required.
Solution Approach 2:
The patent implements priority threshold information inclusion selectively rather than universally. Priority threshold fields are included in COT sharing indication information only when necessary for the specific sharing scenario, such as when multiple UEs are sharing the same COT or when differentiated priority handling is required, thereby balancing reliability with information overhead.
Data Source
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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, and a priority of data on the first resource is higher than or equal to the priority threshold. 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.