Dynamic RX-SOP Threshold Adjustment for Wi-Fi Cell Edge Sensitivity
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Solution Overview
Problem
Current manual adjustments of Receiver Start of Packet (RX-SOP) detection thresholds in Wi-Fi cells are inadequate for addressing asymmetry in upstream and downstream traffic, leading to traffic drops and frame losses due to changing endpoint densities and types within a cell area.
Innovation Solution
An automated mechanism that estimates and updates packet demodulation thresholds for access points based on multi-dimensional radio frequency statistics collected from RF neighborhoods using sensors, dynamically adjusting the RX-SOP settings to optimize cell edge sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual RX-SOP adjustment is used, then device complexity is reduced, but reliability deteriorates due to suboptimal settings and traffic drops
Solution Approach 1:
The access point automatically adjusts its own RX-SOP threshold based on feedback about detected packets and traffic conditions, eliminating the need for manual intervention while maintaining optimal performance. The system monitors its own operation and self-corrects suboptimal settings.
Solution Approach 2:
The system implements a feedback loop where the access point monitors detected packets and traffic conditions, compares actual performance against expected performance, and adjusts RX-SOP thresholds accordingly. This continuous feedback mechanism ensures reliable link performance adaptation.
2Adaptability or versatility
If fixed RX-SOP threshold is used, then ease of operation is improved, but adaptability deteriorates due to changing endpoint density and types
Solution Approach 1:
The RX-SOP threshold transitions from a fixed value to a dynamic parameter that automatically adapts to changing conditions. The system continuously adjusts the threshold based on real-time monitoring of endpoint density, packet detection accuracy, and traffic patterns, maintaining optimal operation without manual reconfiguration.
3Area of stationary object
If higher RX-SOP threshold is used, then cell coverage is improved, but manufacturing precision (signal detection accuracy) deteriorates due to missed packets
Solution Approach 1:
The system dynamically changes the RX-SOP threshold parameter based on monitoring packet detection accuracy and traffic conditions. When the threshold is raised to expand cell coverage, the system verifies that packet detection remains accurate and adjusts the threshold accordingly, preventing missed packets while maximizing coverage area.
Data Source
AI summary
The present disclosure provides systems and methods for dynamically adjusting cell coverage sensitivity to address asymmetry of wireless cells that affect upstream and downstream traffic mismatch. In one aspect, a method includes estimating, at a network controller, one or more packet demodulation thresholds for an access point; sending, by the network controller, the one or more packet demodulation thresholds to the access point; receiving, from the access point, collected statistic, the collected statistics being link performance characteristics between the access point and one or more endpoints associated with the access point measured by one or more sensors associated with the access point; updating, at the network controller, the one or more packet demodulation thresholds based on the collected statistics to yield an updated packet demodulation threshold; and configuring, by the network controller, the access point with the updated demodulation threshold.