Shared COT and FFP Filtering via Destination IDs in Sidelink
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Solution Overview
Problem
The increasing demand for mobile broadband communication with enhanced reliability and low latency in wireless communication systems, particularly in sidelink communication, poses challenges in efficiently managing channel occupancy times (COT) for data transmission between user equipments (UEs) without intervention from an evolved Node B.
Innovation Solution
A method and device for performing wireless communication that involves receiving sidelink control information (SCI) related to a channel occupancy time (COT), determining the use of the COT based on destination identifiers, performing channel sensing, and transmitting SL data using the first resource if the channel is idle, thereby optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel occupancy time is extended to improve data transmission capacity, then productivity increases, but loss of time increases due to longer channel occupation
Solution Approach 1:
The patent implements dynamic COT sharing where the channel occupancy time is not fixed but adaptively adjusted based on real-time channel conditions and traffic requirements. Multiple UEs can dynamically share the COT through sensing-based resource selection, allowing the effective transmission capacity to increase while the actual time each UE occupies the channel is optimized to minimize total occupation time.
Solution Approach 2:
The patent segments the channel occupancy time into multiple sub-periods that can be shared by different UEs. Instead of one UE monopolizing the entire COT, the channel access opportunity is divided into multiple transmission opportunities where different UEs can transmit based on their needs and channel sensing results, thereby increasing overall productivity without extending the total COT duration.
2Reliability
If channel sensing is performed for every resource to improve reliability, then reliability increases, but loss of time increases due to repeated sensing operations
Solution Approach 1:
The patent applies partial sensing where UEs perform channel sensing only for a subset of candidate resources rather than all available resources. This reduces the sensing time while maintaining reliability by focusing sensing efforts on the most promising resources. The UE selects resources from a configured set based on partial sensing results, achieving adequate reliability without the time cost of exhaustive sensing.
3Productivity
If multiple UEs share the same COT to improve resource utilization, then productivity increases, but device complexity increases due to coordination requirements
Solution Approach 1:
The patent implements autonomous COT sharing where each UE independently performs channel sensing and selects resources based on pre-configured parameters and sensed channel conditions. UEs self-manage their resource selection within the shared COT without requiring complex centralized coordination or inter-UE negotiation protocols. This reduces device complexity while maintaining high resource utilization through distributed autonomous decision-making.
4Loss of time
If channel occupancy time is reduced to decrease loss of time, then loss of time decreases, but productivity decreases due to limited transmission capacity
Solution Approach 1:
The patent enables the shared COT to serve multiple UEs simultaneously for different transmission purposes. The same channel occupancy period is universally utilized by multiple UEs who can transmit data, control information, and perform sensing operations within the shared COT framework. This multi-functional use of the COT increases effective productivity while keeping the total channel occupation time limited.
Data Source
AI summary
An operation method of a first device (100) in a wireless communication system is presented. The method may comprise the steps of: receiving SCI related to COT from a second device (200); and determining, on the basis of a first destination ID included in the SCI and first ID of the first device, to use the COT.