Mobile Device Radio Signal Spoofing Detection
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Solution Overview
Problem
Non-GNSS based radio positioning systems, such as Bluetooth, WLAN, and cellular networks, are vulnerable to manipulation techniques like spoofing and jamming, which can deceive devices into determining incorrect positions, posing a threat to trustworthy positioning services like car sharing.
Innovation Solution
A method where a mobile device obtains radio signal parameters at two positions and uses sensor information to determine if the parameters are expected or unexpected, identifying potentially manipulated signals by comparing the parameters and movement data, and rejecting or flagging them for position estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-GNSS based radio positioning systems are used for indoor positioning, then positioning capability indoors is improved, but vulnerability to spoofing and jamming attacks increases
Solution Approach 1:
The system performs preliminary actions by collecting radio fingerprint observation reports from multiple mobile devices during a training stage before actual positioning. This creates a database of expected radio signal characteristics at different locations, which is then used to verify and detect manipulated signals during the positioning stage. The preliminary collection of authentic signal data enables the system to identify spoofing attempts by comparing them against the established baseline.
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring radio signal parameters and comparing them against expected values derived from training data and sensor information. When discrepancies are detected between actual and expected signal characteristics, the system can identify and reject manipulated signals. This feedback loop enables dynamic detection and mitigation of spoofing and jamming attacks in real-time positioning operations.
2Measurement precision
If radio signal parameters are collected from multiple sources for positioning, then positioning accuracy is improved, but difficulty in detecting manipulated signals increases
Solution Approach 1:
The system segments the verification process into multiple independent checks: comparing radio signal parameters against training data, validating sensor information consistency, and cross-checking multiple observation reports. By dividing the detection task into separate verification stages, the system can identify manipulated signals more effectively without compromising positioning accuracy. Each segmentation layer adds an additional filter for detecting anomalies.
Solution Approach 2:
The system creates a composite verification approach by combining multiple types of data (radio fingerprint observation reports, sensor information, training data) to form a comprehensive detection mechanism. This composite methodology integrates diverse information sources to enhance the ability to detect manipulated signals while maintaining positioning precision. The combination of different data types creates a more robust detection system than any single source could provide.
Data Source
AI summary
A method performed by a mobile device is disclosed that includes obtaining one or more first radio signal parameters of one or more radio signals at a first position of the mobile device and obtaining sensor information indicating a movement of the mobile device from the first position to a second position. The method also includes obtaining one or more second radio signal parameters of the one or more radio signals at the second position of the mobile device and determining, at least partially based on the first radio signal parameters and the sensor information, whether the second radio signal parameters are expected or unexpected for the second position of the mobile device. A corresponding apparatus and computer-readable storage medium are also disclosed.


