LBT COT Sharing for Coordinated Channel Access in Unlicensed Bands
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently sharing and utilizing channel occupancy time (COT) to optimize resource allocation, particularly in unlicensed bands, which affects data transmission efficiency and latency in advanced communication systems like 6G.
Innovation Solution
A method for wireless communication where a first device shares information about the non-use of a COT with a second device, enabling coordinated resource allocation and transmission strategies to enhance data transmission efficiency and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a device performs independent channel access in unlicensed bands, then channel utilization flexibility is improved, but resource waste increases due to redundant LBT procedures
Solution Approach 1:
The patent merges the channel access procedures of multiple devices by allowing one device to perform LBT on behalf of others in the group. The initiating device performs a single LBT procedure and shares the COT with other group members, eliminating redundant LBT procedures while maintaining independent channel access capability. This is achieved through group-based COT sharing where member devices can transmit within the shared COT without performing separate LBT.
Solution Approach 2:
The patent enables a single LBT procedure to serve multiple devices simultaneously. The initiating device's LBT result becomes universally valid for all group members during the shared COT period. This multi-functional approach allows one device to perform the channel access function that would traditionally require each device to perform individually, reducing overall system energy consumption while preserving access flexibility.
2Productivity
If channel occupancy time is shared among multiple devices, then resource utilization efficiency is improved, but coordination complexity increases
Solution Approach 1:
The patent segments devices into groups with a designated initiating device that manages COT sharing. Each group is self-contained with clear role differentiation (initiator vs. members), simplifying coordination within the group. The initiating device performs LBT and shares COT with members, while members follow predefined rules for utilizing the shared COT. This segmentation approach limits coordination complexity to within-group interactions rather than system-wide coordination.
Solution Approach 2:
The patent enables group members to autonomously utilize the shared COT based on pre-configured rules without requiring continuous coordination with the initiator. Members can independently transmit during their allocated resources within the shared COT, and the system self-manages COT extension through predefined mechanisms. This self-service approach reduces coordination overhead while maintaining efficient resource utilization.
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AI summary
Proposed are a method for a first device to perform wireless communication and a device for supporting same. For example, the first device may receive information related to COT sharing from a second device. For example, the first device may determine not to use a first resource in the COT. For example, the first device may transmit information related to the non-use of the COT to the second device on the basis of the determination.