Multi-Radar Spoofing Detection via Spatial-Temporal Consistency
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Solution Overview
Problem
Vehicles are vulnerable to spoofing signals that interfere with ranging circuits, leading to inaccurate location determination and compromised safety functions such as cruise control and collision detection.
Innovation Solution
A spoofing detection system that includes a spoofing detection circuit communicatively coupled to a ranging circuit group, which requests and analyzes range measurements from multiple ranging circuits to detect and mitigate spoofing signals by checking for spatial and temporal consistency of estimated locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ranging circuits transmit radar waveforms to detect obstructions and determine location, then vehicle safety functions (obstacle detection, collision avoidance) are improved, but the system becomes vulnerable to spoofing signals that can interfere with and compromise these safety functions
Solution Approach 1:
The patent introduces a spoofing detection circuit as an intermediary component that mediates between the ranging circuits and the vehicle's processing system. This circuit receives range measurements from multiple ranging circuits, estimates target locations, and detects inconsistencies that indicate spoofing signals. By inserting this intermediary detection layer, the system can identify and mitigate spoofing interference while maintaining the original radar-based safety functions.
Solution Approach 2:
The spoofing detection circuit implements a feedback mechanism by continuously monitoring range measurements from multiple ranging circuits, comparing estimated locations against expected spatial and temporal consistency, and generating detection results that can trigger mitigation actions. This feedback loop enables the system to adaptively respond to spoofing attempts, improving reliability by correcting or rejecting compromised measurements in real-time.
2Measurement precision
If the system uses multiple ranging circuits to detect spoofing signals through spatial and temporal consistency checks, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the spoofing detection function into distinct modular components: multiple ranging circuits that transmit radar waveforms, a spoofing detection circuit that receives and processes range measurements, and a processing system that implements mitigation actions. This segmentation allows the system to achieve high measurement precision through multi-circuit comparison while managing complexity through functional separation and specialized processing for each component.
Solution Approach 2:
The spoofing detection circuit serves multiple functions simultaneously: it receives range measurements from multiple ranging circuits, estimates target locations using these measurements, detects spoofing signals by checking spatial and temporal consistency, and generates outputs for mitigation actions. This multi-functionality reduces overall system complexity by consolidating detection, analysis, and decision-making capabilities into a single integrated circuit rather than requiring separate systems for each function.
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
Effectively detects and mitigates spoofing signals, preventing interference with vehicle safety functions and ensuring accurate location determination.
Implementation Method 1
a radar system on the vehicle that includes transmitters configured to transmit a radar waveform in multiple directions towards one or more obstructions. As the transmitted waveform reflects off an obstruction, a receiver of the radar system measures parameters of the reflections
Data Source
AI summary
To detect a spoofing signal transmitted by an attacker, a spoofing detection circuit forms a ranging circuit group by first selecting two or more ranging circuits each disposed at different locations. The spoofing detection circuit then requests and receives a set of measurements over a period of time from each ranging circuit in the ranging circuit group. Based on the received sets of measurements, the spoofing detection circuit estimates one or more locations for a target, a path of the target, or both. The spoofing detection circuit then determines whether the estimated locations or path of the target indicate spatial consistency or temporal consistency. Based on the estimated locations, estimated path, or both not indicating a spatial consistency, temporal consistency, or both, the spoofing detection circuit determines that a spoofing signal was received by the ranging circuit group.