Cat 2 LBT Resuming Wireless Transmission Gaps
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Solution Overview
Problem
Current wireless communication methods for unlicensed frequency bands face inefficiencies in transmission resuming due to the definition of maximum gaps based solely on the initiating device's transmission, leading to reduced resuming effect and increased complexity.
Innovation Solution
The method introduces Category 2 Listen Before Talk (Cat 2 LBT) to be performed when the gap between neighboring transmissions exceeds specific maximum gaps, defined in terms of data transmission on multiple beams, to refine the resuming mechanism and improve efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the maximum gap is defined based on only the existence of transmission on the initiating device, then the control mechanism is simple, but the resuming effect of transmission is reduced
Solution Approach 1:
The patent segments the maximum gap definition into two distinct types: first maximum gap (when none of beams has data transmission) and second maximum gap (when one beam has no data transmission). This segmentation allows for more granular control over transmission resumption, enabling the system to differentiate between complete channel idle states and partial idle states, thereby improving the resuming effect while maintaining manageable complexity through clear categorization.
2Device complexity
If the maximum gap is defined based on all beams within COT, then the transmission resumption control is simplified, but the precision of transmission resumption is reduced
Solution Approach 1:
The patent applies local quality by defining different maximum gap criteria for different beam scenarios. Instead of applying a uniform gap definition across all beams, the system uses the first maximum gap when no beams have transmission and the second maximum gap when specific beams have no transmission. This localized approach allows precise control over transmission resumption for individual beams or groups of beams, enhancing resumption precision without significantly increasing overall system complexity.
3Productivity
If Cat 2 LBT is performed based on the first maximum gap definition, then the transmission resumption is simplified, but the efficiency of channel utilization is reduced
Solution Approach 1:
The patent implements dynamic gap definition by making the maximum gap value dependent on the current beam transmission state. The system dynamically switches between the first maximum gap and second maximum gap based on whether beams are transmitting data or not. This dynamic approach allows Cat 2 LBT to be performed with appropriate gap thresholds for different scenarios, improving channel utilization efficiency by reducing unnecessary idle time while maintaining efficient transmission resumption through adaptive gap selection.
Data Source
AI summary
A wireless communication method, a first device, and a second device are provided. In the method, under the condition that a gap between two adjacent transmissions within a channel occupancy time (COT) is greater than or equal to a first gap, before the second one of the two adjacent transmissions is performed, category 2 Listen Before Talk (Cat 2 LBT) is performed. Here, the first gap includes a first maximum gap and/or a second maximum gap, the first maximum gap is a maximum gap without data transmission on all beams within the COT, and the second maximum gap is a maximum gap without data transmission on one beam within the COT. The second transmission is resumed based on the execution result of the Cat 2 LBT.