UE Jamming Detection via PSD and Location Data
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Solution Overview
Problem
Current anti-jamming solutions for CDMA-based cellular radio networks are inadequate as they rely heavily on signal strength measurements and power comparisons, which are unreliable and fail to differentiate between normal frequency disturbances and jamming, especially during the startup mode when no reference signal is available, and cannot effectively prevent jamming attacks in UMTS and LTE standards.
Innovation Solution
A method that combines power distribution measurements in the received band with location information to distinguish between normal frequency disturbances and jamming, using Power Spectral Density (PSD) analysis and stored deployment data to determine if detected energy is due to jamming or an out-of-service situation, allowing for early detection and prevention of jamming in CDMA-based networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If signal strength measurements and power comparisons are used for jamming detection, then detection capability is provided, but reliability deteriorates due to inability to differentiate between normal frequency disturbances and jamming
Solution Approach 1:
The patent segments the frequency band into multiple sub-bands and performs power distribution analysis across these sub-bands. By examining the power spectral density distribution pattern across segmented frequency portions rather than treating the entire band uniformly, the system can identify abnormal patterns characteristic of jamming signals while filtering out normal interference variations.
Solution Approach 2:
The patent introduces location information as an additional dimension for analysis. By combining power distribution measurements with geographic location data and comparing against stored deployment information, the system creates a multi-dimensional detection framework that enhances reliability by cross-validating detection results across multiple parameters (power distribution, location, deployment data).
2Reliability
If power distribution analysis with location information is used, then detection reliability is improved, but device complexity increases
Solution Approach 1:
The patent stores deployment information (base station locations, frequency band allocations, power distribution patterns) in advance before detection is needed. This pre-stored reference data enables rapid comparison during actual detection operations, reducing real-time computational complexity while maintaining high detection reliability through sophisticated analysis.
3Loss of time
If early detection in startup mode is implemented, then jamming prevention capability is improved, but measurement precision requirements increase due to lack of reference signals
Solution Approach 1:
The patent changes the detection parameters from absolute power level thresholds to relative power distribution patterns across frequency sub-bands. This approach allows meaningful analysis during startup mode without requiring reference signals, as the system detects anomalies based on the shape and distribution pattern of power across frequencies rather than comparing against absolute reference levels.
Data Source
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AI summary
Method of detecting a jamming transmitter, affecting a communication user equipment, wherein said communication user equipment (UE) is adapted for communication with a component of a cellular radio network (RN) having a number of user equipments (UE) and a number of base stations (BNS) for communication in a communication band on a communication channel of predetermined frequency range, providing the user equipment (UE) in a start up mode for achieving a connected mode of a communication radiolink with the component of the radio network (RN), wherein in the start up mode of said user equipment (UE) it is determined that a connected mode of the communication radiolink cannot be established, and wherein jamming detection steps are provided.