Alarm Detection Device Using LPWAN for Jamming Resilience
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Solution Overview
Problem
Current alarm systems are vulnerable to radio jamming, which disrupts communication between sensors and the alarm center, leading to ineffective deterrence and delayed detection of intrusions, as radio communication flaws allow jammers to cut off ISM and GSM links, rendering siren and voice message systems inoperative.
Innovation Solution
A detection and warning device that maintains communication with a remote monitoring center by using a unidirectional LPWAN link to transmit jamming information and immediately activates deterrent devices upon intrusion detection, even in the presence of radio jamming, utilizing a dual-band radio module and low-power wide-area network for robust signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If radio communication is used for alarm system components, then cost and ease of installation are improved, but security is worsened due to vulnerability to radio jamming
Solution Approach 1:
The patent introduces a detection device as an intermediary component that monitors radio frequency interference and triggers alternative communication paths. This mediator detects jamming conditions and activates backup mechanisms, resolving the contradiction by maintaining security through intermediate detection and response actions.
Solution Approach 2:
The system changes communication parameters dynamically by switching from standard radio communication to alternative frequencies or communication methods when jamming is detected. This parameter change allows the system to maintain reliability under attack conditions while preserving the ease of radio-based installation.
2Reliability
If radio jamming occurs, then communication between sensors and alarm center is disrupted, but the invention maintains communication through alternative paths
Solution Approach 1:
The detection device is installed beforehand to cushion against the impact of radio jamming. It continuously monitors for interference and prepares alternative communication paths in advance, so when jamming occurs, the system can switch to protected communication channels without complete loss of connectivity.
Solution Approach 2:
The invention extracts the detection and monitoring function from the main alarm system into a separate detection device. This extracted component specifically monitors for radio interference and can trigger independent alert mechanisms, separating the vulnerability to jamming from the core alarm functionality.
3Speed
If deterrent devices are activated immediately upon intrusion detection, then response time is improved, but false activation due to radio interference is worsened
Solution Approach 1:
The detection device implements feedback by continuously monitoring radio frequency conditions and using this information to verify intrusion signals. Before activating deterrent devices, the system checks whether radio interference is present, and only activates alarms when intrusion is confirmed without jamming conditions, preventing false positives while maintaining rapid response.
Solution Approach 2:
The system performs preliminary detection of radio interference conditions before triggering alarm activation. By checking the radio environment in advance and establishing baseline conditions, the system can distinguish between legitimate intrusions and interference-induced false signals, enabling fast yet reliable response.
Data Source
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AI summary
The invention relates to a detection and alert device (10) for an alarm system comprising: - at least one intrusion detection device (1), - a radio component (2, 42) for jamming detection on the ISM and GSM bands, - processing means, calculation means and storage means (3), configured to perform a processing of the signal provided by the intrusion detection detector and the radio jamming detection component in order to detect an intrusion and/or radio jamming, - a radio module (4, 6) comprising a transmitting radio component (41, 61) ISM and LPWAN and configured to transmit an alert signal either to a local alarm control panel in the ISM band upon intrusion detection without radio jamming, or to an LPWAN network in unidirectional mode in the event of radio jamming detection with or without intrusion detection and a receiving radio component (42, 62) ISM; - power supply means.