Stolen Vehicle Transmitter Jamming Detection
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Solution Overview
Problem
Existing anti-theft vehicle systems equipped with cellular telephone-based stolen vehicle transmitters (SVTs) are vulnerable to control channel jamming, leading to false alarms and unnecessary law enforcement responses, as they cannot distinguish between malicious and non-malicious jamming signals.
Innovation Solution
The system identifies control channel signals as authentic or malicious by monitoring signal strength changes, using a received signal strength indicator (RSSI) to determine abnormal increases, thereby distinguishing between legitimate and malicious jamming, and triggering appropriate countermeasures only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the SVT system attempts to overcome control channel jamming signals, then the system can communicate in stolen vehicle situations, but false alarms are generated when encountering non-malicious jamming signals from businesses
Solution Approach 1:
The system changes the parameter being monitored from simple signal presence to signal strength growth rate. By calculating how quickly the received signal strength indicator (RSSI) increases over time, the system can distinguish between malicious jamming (abnormally fast growth) and non-malicious jamming (normal growth), thereby reducing false alarms while maintaining detection accuracy
Solution Approach 2:
The patent replaces the mechanical approach of attempting to overcome all jamming signals with a detection-based approach. Instead of actively counteracting jamming, the system substitutes a monitoring mechanism that passively observes signal strength changes and triggers appropriate responses only when malicious jamming is detected, eliminating unnecessary countermeasures and false alarms
2Reliability
If the SVT system monitors control channel signals continuously, then malicious jamming can be detected, but system complexity and energy consumption increase
Solution Approach 1:
The system simplifies monitoring by changing from complex signal analysis to simple RSSI strength measurement over time. The core innovation lies in monitoring the growth rate parameter rather than analyzing complex signal characteristics, which reduces computational requirements and system complexity while maintaining effective detection capability
Solution Approach 2:
The system applies partial monitoring action by only triggering detailed analysis when signal strength growth exceeds a threshold rate. Instead of continuously analyzing all signals in detail, the system performs lightweight RSSI monitoring always but only initiates complex detection protocols when abnormal growth is detected, reducing overall system complexity and energy consumption
Data Source
AI summary
A signal on a wireless communication system control channel can be identified as authentic or malicious by monitoring control channel signal strength changes. When a control channel signal level increases abnormally fast or too quickly, i.e., above a threshold value rate of increase, the control channel signal is identified as likely being from a malicious source, such as a jamming transmitter.