UWB Anchor Scheduling to Avoid RAT Interference Indoors
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Solution Overview
Problem
UWB signals experience interference from Radio Access Technology (RAT) signals operating in the same frequency spectrum, compromising the reliability and accuracy of UWB communications, particularly in UWB networks with overlapping frequency bands.
Innovation Solution
Implement adaptive scheduling of UWB transmissions by having UWB anchors learn the pattern of RAT signal interference and adjust their transmission schedules to minimize interference, using interference reports to determine optimal UWB channels for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UWB anchors transmit signals in the UWB frequency band, then indoor navigation and ranging functions are provided, but interference from RAT signals degrades signal quality and communication reliability
Solution Approach 1:
The patent implements dynamic transmission scheduling where UWB anchors adjust their transmission timing based on real-time interference conditions. The scheduling controller receives interference reports, analyzes RAT signal patterns, and dynamically modifies UWB transmission schedules to avoid high-interference periods, thereby maintaining reliable communication despite the presence of harmful RAT signals
Solution Approach 2:
The system employs feedback mechanisms where UWB anchors continuously monitor and report interference conditions to the scheduling controller. These interference reports include signal quality measurements that feed back into the scheduling process, enabling the system to adapt transmission parameters based on actual interference levels and maintain optimal communication performance
2Adaptability or versatility
If UWB anchors use fixed transmission schedules, then system operation is simple, but interference from RAT signals cannot be avoided
Solution Approach 1:
The scheduling controller performs preliminary analysis of interference patterns by receiving and processing interference reports before actual UWB transmissions occur. By predicting high-interference periods in advance and pre-adjusting transmission schedules accordingly, the system avoids interference without requiring complex real-time modifications during active communication
Solution Approach 2:
The patent segments the UWB frequency band into multiple channels and divides transmission time into scheduled slots. This segmentation allows the system to selectively transmit on specific channels during specific time periods when interference is minimized, providing adaptability while maintaining manageable complexity through structured scheduling
3Measurement precision
If UWB signals transmit at high power to improve range, then communication distance increases, but interference from RAT signals increases proportionally
Solution Approach 1:
The system employs periodic transmission patterns where UWB anchors transmit signals at scheduled intervals rather than continuously. By spacing transmissions periodically and selecting optimal time windows within the periodic cycle, the system achieves sufficient ranging accuracy while minimizing the total interference generated in the shared spectrum
Data Source
AI summary
A method for adaptive scheduling of Ultra-Wideband (UWB) transmissions for one or more UWB anchors in a UWB network includes: receiving one or more interference reports from the one or more UWB anchors comprising one or more signal quality measurements of one or more UWB signals experiencing interference; and sending one or more UWB transmission schedules based on the one or more interference reports to the one or more UWB anchors. The one or more UWB anchors may be assigned to transmit messages over one or more UWB channels such that effects of interference may be mitigated or avoided without requiring modification of the signal transmission schedule of other signals.