WiFi Incumbent Interference Classification Using AFC and Spectral Analysis
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Solution Overview
Problem
Existing AFC solutions do not effectively prevent interference from 6GHz incumbents with WiFi transmissions, leading to potential interference issues in WiFi deployments, especially in low power indoor mode.
Innovation Solution
An AFC database is queried to provide a location-specific incumbent list, which includes geographically relevant 6GHz incumbents, allowing WiFi networks to identify and avoid interference by configuring network parameters to minimize interference from these incumbents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing AFC solutions are used to avoid WiFi devices interfering with 6GHz incumbents, then WiFi device transmission protection is improved, but incumbent interference protection deteriorates
Solution Approach 1:
The patent inverts the traditional AFC approach by not only protecting incumbents from WiFi devices but also protecting WiFi devices from incumbent interference. The system performs bidirectional interference management: (1) prevents WiFi devices from interfering with incumbents using traditional AFC coordination, and (2) actively detects and avoids incumbent signals that would interfere with WiFi transmissions by scanning for incumbent presence and configuring WiFi to operate in non-interfering channels or modes
Solution Approach 2:
The patent introduces an intermediary mechanism - the AFC database and spectral analysis system - that mediates between WiFi devices and incumbents. This intermediary collects incumbent location and operational data, performs spectral analysis to identify potential interference, and provides coordination information back to WiFi devices, enabling bidirectional protection without direct interaction between WiFi devices and incumbents
2Measurement precision
If spectral analysis and AFC query are performed to identify interfering devices, then interference detection precision is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-populating the AFC database with incumbent location, frequency, and operational characteristics before WiFi deployment. This pre-collected information enables faster and more accurate interference detection without requiring complex real-time analysis of all possible incumbent parameters, reducing system complexity while maintaining detection precision
Solution Approach 2:
The patent extracts only the most relevant incumbent parameters needed for interference detection - specifically location, frequency band, and spectral characteristics - from the complete set of possible incumbent data. This selective extraction focuses computational resources on critical interference indicators, improving detection precision while avoiding the complexity of processing all available incumbent information
Data Source
AI summary
Techniques for identifying potentially interfering wireless incumbents are disclosed. These techniques include receiving, from an electronic repository, a list of one or more wireless devices operating in a wireless communication band used by a wireless communication network. The list is selected from a plurality of wireless devices operating in the wireless communication band, based on a geographical location relating to the wireless communication network. The techniques further include scanning a plurality of radio channels relating to the wireless communication band, and identifying an interfering device for the wireless communication network based on comparing spectral data from the scanning with data in the list of one or more wireless devices.