Wireless Interferer Identification via Angle of Arrival Triangulation
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Solution Overview
Problem
In dense wireless environments, unforeseen sources of interference, such as highly utilized wireless networks or malfunctioning devices, can significantly degrade channel throughput due to unpredictable channel occupancy and co-channel interference, making it difficult to maintain reliable data transfer.
Innovation Solution
A system comprising at least two scanners and a controller that maps the location of the scanners, capable of detecting the angle of arrival of wireless signals, scans for highly utilized channels, determines the source of interference using triangulation, and presents the location via a user interface, allowing users to identify and address potential interferers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple devices operate in the vicinity using shared radio bands, then wireless network coverage and device connectivity are improved, but channel collisions and co-channel interference increase, deteriorating effective channel throughput
Solution Approach 1:
The system performs preliminary scanning of wireless channels to detect highly utilized channels before normal operation. By proactively identifying interferers and their locations, the system enables preventive actions (such as channel switching or interferer removal) before collisions occur, thus maintaining high throughput while preserving network coverage
Solution Approach 2:
The controller acts as an intermediary that receives scan results from multiple scanners, processes the data to identify highly utilized channels, determines interferer locations using triangulation, and provides recommendations. This intermediary processing layer transforms raw scan data into actionable intelligence, enabling coordinated response to interference without disrupting individual device operations
2Reliability
If the Channel Access Mechanism is implemented to avoid collision, then regulatory compliance is achieved, but channel utilization becomes inefficient due to random TX collisions and contention in dense environments
Solution Approach 1:
The system implements a feedback mechanism where scanners continuously monitor wireless channels, detect highly utilized channels, and report to the controller. The controller processes this feedback, determines interferer locations, and provides recommendations for channel avoidance. This closed-loop feedback enables dynamic adaptation to interference conditions, improving channel utilization while maintaining regulatory compliance through informed channel access decisions
3Measurement precision
If scanners are deployed to detect interferers, then identification accuracy is improved, but system complexity and cost increase due to requiring multiple scanners and triangulation processing
Solution Approach 1:
The system divides the interferer detection task among multiple scanners positioned at different locations. Each scanner independently performs channel scanning and reports findings to the controller. This segmentation allows triangulation to achieve high location accuracy while distributing the detection workload, reducing the burden on any single device and making the overall system more manageable despite the multiple components
4Productivity
If the system scans for highly utilized channels and identifies interferers, then channel throughput is improved by avoiding interfered channels, but time and computational resources are consumed by the scanning and triangulation process
Solution Approach 1:
The system performs scanning on a selective basis, focusing on detecting highly utilized channels rather than exhaustively analyzing all channels. The controller identifies channels with utilization exceeding a threshold and concentrates triangulation efforts on those specific channels. This partial action approach achieves sufficient interference detection to improve throughput without the time cost of complete channel analysis
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively identifies and locates interferers, improving channel utilization and reducing collisions by pinpointing sources of interference, enabling users to take corrective actions and enhance wireless network reliability.
Implementation Method 1
determine an angle of arrival of the signal
Data Source
AI summary
A method for identifying an interferer in a wireless network, the method comprising: providing at least two scanners configured to receive a wireless network signal and to determine the signal's angle of arrival; providing a controller configured to communicate with the scanners, wherein the controller comprises mapping data indicating the location of the scanners and a user interface; requesting at least one of the scanners to perform a scan of the wireless network channels to detect a highly utilized channel; requesting at least two of the scanners to detect the angle of arrival of the signal in the highly utilized channel to the particular scanner; determining a location of a source of the signal in the highly utilized channel based on the mapping data and at least two angles of arrival of the signal to particular scanners; and presenting the location of the source of the signal by user interface.