Wireless Network Device Jamming Detection and Mitigation
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Solution Overview
Problem
Wide band signal jamming disrupts device connectivity in wireless networks, posing risks to critical services like home security and health monitoring by causing loss of signal and potential malicious interference.
Innovation Solution
A wireless network device equipped with a radio and processor that detects signal-to-noise ratio (SNR) and noise floor values across multiple frequency bands, transmitting a jamming warning signal to an external server when thresholds are exceeded, allowing for mitigation of jamming attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wide band signal jamming occurs, then device connectivity is disrupted and critical services are compromised, but implementing detection and mitigation mechanisms increases device complexity
Solution Approach 1:
The patent segments the detection process into distinct functional modules: signal reception module, SNR calculation module, noise floor detection module, threshold comparison module, and warning signal transmission module. Each module performs a specific function in the jamming detection chain, making the overall system more manageable and less complex while maintaining reliable connectivity monitoring across multiple frequency bands
Solution Approach 2:
The system performs preliminary detection actions by continuously monitoring SNR and noise floor values before actual jamming disruption occurs. By establishing baseline thresholds and continuously comparing real-time measurements against these thresholds, the system prepares mitigation responses in advance, preventing connectivity loss rather than reacting after disruption
2Measurement precision
If continuous monitoring of SNR and noise floor values across multiple channels is performed, then jamming detection accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic monitoring where the radio device measures SNR and noise floor values at regular intervals across multiple frequency bands rather than continuously. The system compares measurements against predetermined thresholds at each interval and transmits warning signals only when threshold violations are detected, reducing energy consumption while maintaining adequate detection accuracy through periodic sampling
Solution Approach 2:
The system uses simple, computationally inexpensive threshold comparison logic instead of complex analysis algorithms. By relying on predetermined SNR and noise floor thresholds that require minimal processing power to evaluate, the system achieves accurate jamming detection without consuming excessive energy, effectively using simple disposable-like detection rules rather than expensive complex computations
3Reliability
If threshold-based detection is used for SNR and noise floor values, then false alarms are reduced, but detection response time increases
Solution Approach 1:
The patent establishes predetermined SNR and noise floor thresholds in advance as preliminary protective measures. By pre-calculating what constitutes normal versus jammed conditions and setting thresholds before actual operation, the system can immediately compare real-time measurements against these pre-established criteria, reducing response time while maintaining reliable detection accuracy through the preliminary preparation of detection criteria
Solution Approach 2:
The system skips complex analysis steps by directly comparing measured SNR and noise floor values against predetermined thresholds without intermediate processing. When a threshold violation is detected, the system immediately transmits a warning signal, rushing through the detection process by eliminating unnecessary computational steps and focusing only on the critical threshold comparison action
Data Source
AI summary
A wireless network device in a wide area network is disclosed. A radio of the network device receives a plurality of communication signals. The device detects a signal to noise ratio value and/or a noise floor value and determines, for each frequency channel, when one of the detected signal to noise ratio value is less than a signal to noise ratio threshold value for a period of time and/or the detected noise floor value is greater than a noise floor threshold value for the period of time. The device transmits a jamming warning signal when one of the detected signal to noise ratio value for each of the channels is determined to be greater than the signal to noise ratio threshold value for the period of time and/or the detected noise floor value for each channel is greater than the noise floor threshold value for the period of time.