GNSS Signal Plausibility Check Against Spoofing in Vehicles
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Solution Overview
Problem
Global navigation satellite systems (GNSS) are vulnerable to interference and manipulation by jammers and spoofers, leading to incorrect position determination and security vulnerabilities in Vehicle-to-X (V2X) systems, affecting multiple vehicles within a range.
Innovation Solution
A method to verify the plausibility of position signals by comparing vehicle position with detected objects using various sensors and communication systems, including cameras, radar, lidar, and V2X messages, and analyzing relative satellite movements and signal characteristics to detect anomalies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GNSS position signals are used to determine vehicle position, then global positioning capability and time synchronization are provided, but the system becomes vulnerable to jamming and spoofing attacks that can manipulate position data
Solution Approach 1:
The patent introduces an intermediary verification system that compares GNSS-derived position with independently determined position from detection systems (cameras, radar, lidar, V2X). This intermediary comparison mechanism validates whether GNSS signals are genuine or manipulated, resolving the vulnerability to jamming and spoofing while maintaining global positioning capability
Solution Approach 2:
The system implements feedback by continuously monitoring the consistency between GNSS position data and detection system position data. When inconsistencies exceed a threshold, the system generates warnings or disables GNSS-based functions, creating a closed-loop verification that prevents manipulation from affecting the final position determination
2Measurement precision
If multiple detection systems (cameras, radar, lidar, V2X) are integrated to verify position, then spoofing detection capability is improved, but device complexity and computational requirements increase
Solution Approach 1:
The patent applies partial action by implementing a tiered verification approach: first checking basic plausibility criteria (whether detected objects match map data), then only performing full multi-sensor fusion when GNSS signals show anomalies. This reduces routine computational complexity while maintaining high verification accuracy when needed
Solution Approach 2:
The verification system is segmented into independent modules: object detection module, position calculation module, comparison module, and decision module. Each module processes specific tasks independently, reducing overall system complexity while achieving high measurement precision through coordinated operation of specialized components
Data Source
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AI summary
The invention relates to a method for verifying the plausibility of position signals (112, 14f) of a global satellite navigation system (100) in a signal receiver, in particular a vehicle (1), which comprises a receiving device (16, 10) for receiving the position signals (112, 14f), comprising the steps: - receiving the position signals (112, 14f) to determine the own position of the signal receiver, - comparing the position signals (112, 14f) with previous position signals of the signal receiver, - verifying the plausibility of the position signals (112, 14f) if there is no abrupt change in the properties of the received position signals compared to the properties of previous position signals.