Channel Occupancy Time Sharing Rules for Unlicensed Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a lack of valid schemes for determining channel occupancy time (COT) in unlicensed spectrum usage, particularly for devices operating in the frame-based equipment (FBE) mode, and unclear rules for when user equipment (UE) or a base station should initiate or share COT for data transmission.
Innovation Solution
A method and apparatus for determining COT by detecting information from a second communication node, such as unicast traffic data or group control signaling, to determine whether a first communication node should initiate or share COT for data transmission, considering conditions like COT length and channel occupancy initiation criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a device performs CCA before sending data on unlicensed carrier, then channel access compliance is improved, but channel occupancy time determination clarity deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the first communication node detects information (such as COT indication information or group control signaling) sent by the second communication node to determine whether to share COT. This feedback loop provides clear rules for COT determination, resolving the ambiguity while maintaining CCA compliance for reliable channel access.
2Productivity
If clear rules for COT initiation and sharing are established, then channel usage optimization is improved, but device complexity increases
Solution Approach 1:
The patent uses parameter-based decision making where the first communication node changes its behavior based on detected parameters in the information sent by the second node (such as COT length, COT indication values, or group control signaling). This approach provides clear rules for channel usage optimization while keeping the device logic manageable through parameter-driven decisions rather than complex algorithms.
Data Source
AI summary
A channel occupancy time determination method is applied to a first communication node. The method includes, in response to the first communication node initiating no channel occupancy, detecting information sent by a second communication node; and determining, according to the detection result, channel occupancy time (COT) for data transmission.