Dynamic Radar Detection Threshold for Wi-Fi DFS
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Solution Overview
Problem
Conventional Wi-Fi access points (APs) using Dynamic Frequency Selection (DFS) face issues with false radar detection due to static radar detection thresholds, leading to degraded network performance and customer experience, as these thresholds do not account for varying transmission loads.
Innovation Solution
Implementing a dynamic radar detection threshold system that adjusts the minimum number of radar bursts or pulses based on the access point's mode and transmission duty time, allowing for adaptive detection and reducing false positives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a static radar detection threshold is used, then the detection process is simple, but false radar detection events increase and network performance degrades
Solution Approach 1:
The patent implements a dynamic radar detection threshold that adapts based on the access point's transmission duty time. The threshold is no longer fixed but changes according to actual operating conditions, allowing the system to maintain high detection accuracy while avoiding false positives that occur with static thresholds under varying load conditions.
Solution Approach 2:
The patent changes the detection threshold parameter dynamically based on transmission duty time. By adjusting this critical parameter according to operational conditions, the system resolves the contradiction between maintaining simple detection and achieving reliable performance, as the threshold adapts to prevent false detections while preserving detection capability.
2Device complexity
If a static radar detection threshold is used, then the system complexity is low, but false detection events increase
Solution Approach 1:
The system introduces dynamic adaptation to the detection threshold based on transmission duty time, transforming a simple static threshold into an adaptive mechanism. This adds minimal complexity while dramatically improving detection accuracy by preventing false positives under varying operational loads.
Solution Approach 2:
The patent implements feedback by monitoring the transmission duty time and using it to adjust the detection threshold accordingly. This feedback loop allows the system to automatically adapt to changing conditions, improving detection accuracy without requiring complex manual configuration or intervention.
3Measurement precision
If the detection threshold is lowered to improve radar detection sensitivity, then real radar signals are detected more accurately, but false detection events increase
Solution Approach 1:
The patent makes the detection threshold dynamic rather than fixed, allowing it to adjust based on transmission duty time. This resolves the contradiction by enabling high sensitivity when appropriate while automatically raising the threshold during high-load periods when false detections are more likely, thus maintaining both sensitivity and reliability.
Data Source
AI summary
Embodiments are directed to a dynamic radar detection threshold for stateful dynamic frequency selection (DFS). An embodiment of a storage medium includes instructions to operations including estimate a duty time of transmission of wireless signals by an access point, the access point to provide Wi-Fi communication, the wireless signals being communicated on a DFS channel of the access point, adapt, based at least in part on the duty time of transmission, a threshold of radar signals to indicate detection of a radar signal at the access point on the DFS channel, and perform analysis of received wireless signals on the DFS channel at the access point to detect the radar signal using the adapted threshold of radar signals.