Jamming Detection in Security Systems Using Ultra-Narrowband Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current security systems are vulnerable to jamming attacks on wireless communications, with existing solutions either insufficient in protecting against aggressive jamming or limiting the number of connected elements and data load, and requiring significant resources for calibration and energy consumption.
Innovation Solution
A jamming detection device using an ultra narrow band network for alarm signal transmission, which periodically scans frequency bands for jamming and sends alarm signals through an ultra narrow band network with random frequency hopping and binary-phase-shift-keying modulation, ensuring resilience against malicious jamming while maintaining normal operation without jamming, and incorporating features like accelerometers and thermometers for tampering detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless communication is used in security systems, then security and flexibility are improved, but vulnerability to jamming attacks increases
Solution Approach 1:
The system dynamically switches between wideband wireless communication for normal operation and ultra-narrowband communication for jamming-resistant alarm transmission. The transceiver adapts its operating mode based on detected jamming conditions, transitioning from ISM/GSM bands to ultra-narrowband frequencies when interference is detected.
Solution Approach 2:
The system changes key communication parameters including frequency band (from wideband ISM/GSM to ultra-narrowband), modulation scheme, and bandwidth allocation. This parameter transformation allows the system to operate in two distinct modes: high-data-rate normal communication and jamming-resistant alarm transmission.
2Reliability
If ultra narrow band network is used for alarm transmission, then jamming resistance is improved, but data transmission capacity is reduced
Solution Approach 1:
The communication system is segmented into two distinct functional paths: a wideband path for high-capacity data transmission during normal operation, and an ultra-narrowband path for reliable alarm transmission during jamming conditions. Each path is optimized for its specific function without compromising the other.
Solution Approach 2:
The transceiver periodically scans frequency bands to detect jamming conditions and switches communication modes accordingly. During non-jamming periods, wideband communication is used for high-capacity data transfer; during detected jamming periods, ultra-narrowband mode activates for reliable alarm transmission.
3Measurement precision
If frequency scanning is performed periodically, then jamming detection capability is improved, but energy consumption increases
Solution Approach 1:
The transceiver performs periodic frequency band scanning at predetermined intervals rather than continuously. This periodic detection approach maintains adequate jamming awareness while significantly reducing average power consumption compared to continuous monitoring.
Solution Approach 2:
The system uses the existing transceiver hardware to perform both normal communication and jamming detection functions, eliminating the need for separate dedicated detection hardware. The transceiver leverages its own operational capabilities to monitor for interference conditions.
4Reliability
If random frequency hopping is used, then anti-jamming capability is improved, but signal synchronization difficulty increases
Solution Approach 1:
The system employs dynamic frequency selection where the exact carrier frequency is randomly chosen within the ultra-narrowband range for each transmission. This dynamic frequency hopping provides frequency diversity and jamming resistance while keeping the bandwidth extremely narrow to maintain signal integrity.
Solution Approach 2:
Instead of hopping across many wide frequency channels, the system hops within a single ultra-narrowband dimension. This approach provides frequency diversity benefits while minimizing synchronization complexity by confining frequency variations to a very narrow spectral range.
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
The solution effectively protects security systems against intentional or accidental jamming, maintains normal operation without jamming, optimizes energy consumption, and enhances autonomy by using an ultra narrow band network with random frequency hopping and binary-phase-shift-keying modulation, while preventing physical tampering and temperature-related issues.
Implementation Method 1
a transceiver to periodically scan one or more frequency bands used for signal transmission
Implementation Method 2
binary-phase-shift-keying modulation
Data Source
Figure 1~2
Figure 3~4
AI summary
Jamming detection device (7) and method, which scan one or more frequency bands (201, 401, 402) and, if jamming is detected in said frequency bands (201, 401, 402), transmits an alarm signal through an ultra narrow band network (8). Preferably, both an ISM network (2) connecting a control panel (3) and at least one peripheral (1), and a GSM network (4) connecting the control panel (3) and a back end service (5), are scanned. Also preferably, the ultra narrow band network (8) is implemented over the same frequency band (801) as the ISM network (2) connecting the control panel (3) and the least one peripheral (1).