Wireless Base Station Channel Coordination for Unlicensed Bands
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Solution Overview
Problem
Licensed Assisted Access (LAA) faces unfair competition for unlicensed frequency bands due to continuous channel occupation by base stations, leading to reduced opportunities for other access mechanisms like Wi-Fi and base stations of other operators.
Innovation Solution
A wireless communication device and method that determine and coordinate start and end times for data transmission on secondary carriers in unlicensed frequency bands, ensuring that base stations end their data transmission before a specified time, allowing other access mechanisms to fairly compete for the unlicensed frequency band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If base stations continuously occupy the unlicensed frequency band for data transmission, then data transmission efficiency is improved, but fair competition with other access mechanisms deteriorates
Solution Approach 1:
The base station performs periodic channel occupancy checks and transmits data in periodic time intervals rather than continuously occupying the channel. This periodic transmission pattern allows other access mechanisms to access the unlicensed band during non-occupancy periods, ensuring fair competition while maintaining data transmission efficiency through regular periodic access.
2Duration of action of moving object
If base stations occupy the unlicensed frequency band for extended periods, then data transmission continuity is improved, but opportunities for other access mechanisms deteriorates
Solution Approach 1:
The base station performs preliminary channel occupancy checks before transmitting data and sets predetermined transmission time limits. By checking channel availability in advance and limiting transmission duration, the system ensures continuous data transmission when the channel is available while periodically releasing the channel for other access mechanisms, thus balancing transmission continuity with access opportunities.
3Speed
If base stations transmit data without time coordination, then transmission speed is improved, but interference with other access mechanisms increases
Solution Approach 1:
The base station implements feedback mechanisms by monitoring channel occupancy status and adjusting transmission timing based on detected channel conditions. The system checks whether the channel is occupied before transmitting and adapts transmission speed and timing based on feedback from channel status detection, thereby maintaining high transmission speed when the channel is clear while reducing interference when other access mechanisms are present.
Data Source
AI summary
A wireless communication device and a wireless communication method. The wireless communication device for use on a base station side includes one or more processors. The processor is configured to determine start time and end time of data transmission on one or more auxiliary carriers on an unlicensed frequency band. The processor is further configured to control to send indication information about the start time and the end time to other base stations.