Sidelink COT Sharing for Unlicensed Band Utilization
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Solution Overview
Problem
The increasing demand for higher performance in sidelink communication between terminal devices, including transmission bandwidth, communication rate, communication delay, reliability, and scalability, cannot be met by limited licensed spectrum, necessitating research into sidelink communication technologies for unlicensed frequency bands.
Innovation Solution
A method and device for sharing channel occupancy time (COT) information between terminal devices using sidelink unlicensed frequency bands, where a first terminal device sends shared COT information to a second terminal device, which then determines and sends its own shared COT information to a third terminal device, optimizing COT length and channel access type to improve frequency band utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If terminal devices use limited licensed spectrum for sidelink communication, then communication reliability is maintained, but transmission bandwidth and communication rate cannot meet higher performance requirements
Solution Approach 1:
The patent combines multiple terminal devices' channel occupancy times into a shared COT resource pool, allowing multiple devices to utilize the same unlicensed frequency band resources simultaneously, thereby increasing transmission bandwidth and improving frequency band utilization
2Productivity
If terminal devices access unlicensed frequency bands independently, then frequency band utilization increases, but communication delay and coordination efficiency deteriorate
Solution Approach 1:
The patent implements preliminary action by having the first terminal device determine and share COT information with the second terminal device before actual data transmission occurs. This advance coordination allows the second device to prepare and transmit data within the predetermined COT window, reducing communication delay while maintaining high frequency band utilization
3Productivity
If COT is shared among multiple terminal devices, then frequency band utilization improves, but device complexity and coordination overhead increase
Solution Approach 1:
The patent segments the COT sharing mechanism into distinct functional modules: the first terminal device performs COT determination and information generation, while the second terminal device performs information reception and data transmission. This segmentation simplifies the overall coordination complexity by dividing responsibilities into clear, manageable stages
Data Source
AI summary
A method for sharing a channel occupancy time (COT) is applied to a sidelink unlicensed frequency band of terminal devices and is performed by a first terminal device. The method includes: sending first shared COT information to a second terminal device; in which the first terminal device is a terminal device for initiating the COT, and the second terminal device is a terminal device with which the COT is shared.