Terminal Occupancy Timing in Unlicensed Band Control Signaling
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Solution Overview
Problem
Existing methods for determining occupancy duration in unlicensed frequency bands result in inconsistent and inaccurate determination of channel occupancy time, leading to difficulties in synchronizing terminal operations with base station communication.
Innovation Solution
A method for a terminal to receive public control information containing time domain unit format and channel occupancy time indications, allowing it to determine and reconcile overlapping first and second occupancy durations to accurately determine the base station's occupancy duration on the unlicensed frequency band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the terminal determines occupancy duration based on slot format indicators, then the determination process is simple, but the accuracy and reliability of occupancy duration determination deteriorates due to inconsistencies
Solution Approach 1:
The patent changes the parameter used for determining occupancy duration from slot format indicators to channel occupancy time indications. By switching to a different parameter (channel occupancy time indication information), the system achieves both simplicity in the determination process and improved accuracy in determining the occupancy duration, resolving the contradiction between ease of operation and reliability.
2Quantity of substance
If the terminal uses multiple methods to determine occupancy duration (slot format indicators and occupancy time indications), then more information is available, but the complexity of determining the correct duration increases due to overlapping results
Solution Approach 1:
The patent extracts and prioritizes the channel occupancy time indication information as the primary criterion for determining occupancy duration. By taking out this specific piece of information and using it as the main reference, the system simplifies the determination process while still having access to slot format indicator information for supplementary purposes, thus reducing complexity despite having multiple information sources.
Solution Approach 2:
The patent establishes a feedback mechanism where the terminal compares the occupancy duration determined from slot format indicators with the channel occupancy time indication information. This feedback loop allows the system to resolve conflicts between different information sources and determine the correct occupancy duration, reducing complexity by providing a clear resolution method for overlapping results.
Data Source
AI summary
A method for determining an occupancy duration, includes receiving, on an unlicensed frequency band, public control information sent by a base station, the public control information including time domain unit format indication information and channel occupancy time indication information; determining a first occupancy duration of the base station with respect to the unlicensed frequency band according to the time domain unit format indication information, and determining a second occupancy duration of the base station with respect to the unlicensed frequency band according to the channel occupancy time indication information; and in responding to the first occupancy duration and the second occupancy duration being different from each other and overlapping, determining, according to the second occupancy duration, a duration for the base station to occupy the unlicensed frequency band.