LTE Jamming Detection via Dual Power Threshold Segmentation
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Solution Overview
Problem
Current jamming detection methods for LTE-based communication systems are inadequate, as they rely on insufficient measurements that fail to reliably detect jamming transmitters, particularly in LTE networks where narrowband jamming can disrupt communication by affecting only the broadcast channel, leading to undetected interference and service disruptions.
Innovation Solution
A method that involves decoding cell control information, detecting wideband and channel power parameters, and using threshold comparisons to differentiate between wideband and narrowband jamming, allowing for early detection of jamming transmitters and distinguishing between jamming and out-of-service or out-of-coverage states, thereby enhancing reliability and specificity of jamming detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insufficient measurements are used for jamming detection, then the detection method is simple, but the reliability of jamming detection deteriorates
Solution Approach 1:
The patent segments the power parameter measurements into two distinct types: wideband power parameters (measuring total power across the entire communication band) and channel power parameters (measuring power in specific channels). This segmentation allows the system to detect different types of jamming (wideband vs. narrowband) by comparing results from these separate measurement segments, thereby improving detection reliability without requiring a single overly complex measurement system.
Solution Approach 2:
The patent introduces an intermediary comparison mechanism that evaluates both wideband and channel power parameters against threshold values. This intermediary step acts as a mediator between the raw power measurements and the final jamming detection decision, allowing the system to reliably distinguish between actual jamming conditions and normal signal variations through systematic threshold-based evaluation.
2Measurement precision
If only broad frequency interference detection is used, then the detection method is simple, but the ability to detect narrowband jamming deteriorates
Solution Approach 1:
The patent divides the frequency spectrum monitoring into two segments: wideband power parameter measurement (covering the entire communication band) and channel power parameter measurement (focusing on specific channels). This segmentation enables the system to detect both wideband jamming (through wideband measurements) and narrowband jamming (through channel-specific measurements), achieving high measurement precision for different jamming types without requiring an overly complex unified detection approach.
Solution Approach 2:
The patent applies local quality by performing channel power parameter measurements that focus on specific channels where narrowband jamming may occur. Instead of uniformly monitoring all frequencies with the same precision, the system applies targeted local measurements to specific channels, improving detection precision for narrowband jamming while maintaining overall system efficiency.
3Measurement precision
If power parameters are not compared with threshold values, then the detection process is simple, but the ability to differentiate jamming from other states deteriorates
Solution Approach 1:
The patent employs parameter changes by comparing power parameters (both wideband and channel) against predefined threshold values. This threshold-based comparison transforms the raw power measurements into meaningful detection decisions, enabling the system to precisely differentiate between jamming conditions (where parameters exceed thresholds) and normal operational states (where parameters remain within thresholds), achieving high measurement precision through systematic parameter evaluation.
Data Source
AI summary
A base station in a cellular radio network and user equipment assigned to a cell are linked by an air interface for communication on a respective communication channel in a communication band. The same communication band is common to at least one of the cells and to the user equipment on the respective communication channel of a cell. A jamming transmitter is detected by decoding a cell, by way of successful reading of control information of the cell, detecting a wideband power parameter representative of the communication band, and detecting a channel power parameter representative for a part of the communication band that is a communication channel. A narrowband jamming transmitter is indicated in the case that decoding of the cell failed, the wideband power parameter is not above a first threshold, and the channel power parameter is above a second threshold.