Vehicle Bus Anomaly Detection via Message Format and Timing Checks
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Solution Overview
Problem
Modern vehicles' communication systems are vulnerable to anomalies and external attacks, leading to improper message transmission that can cause driver annoyance, distraction, or changes in vehicle behavior due to false signals and messages.
Innovation Solution
A system comprising a vehicle bus and an electronic processor configured to detect anomalies in message format, timing, and signal parameters, generating errors if discrepancies are found, to ensure secure and reliable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If communication systems in vehicles are made more complex to include more computers and electrical components, then the functionality and control capabilities are improved, but the vulnerability to disruptions and anomalies increases
Solution Approach 1:
The system performs preliminary checks on message format, timing, and signal parameters before executing communication commands. By detecting anomalies in advance (such as impossible timing values or invalid signal ranges), the system prevents malicious messages from disrupting vehicle operations, thus resolving the contradiction between enhanced functionality and communication security.
Solution Approach 2:
The intrusion detection system continuously monitors communication messages and provides feedback about anomalies to the electronic processor. This feedback mechanism allows the system to identify and respond to disruptions in real-time, maintaining reliability while supporting complex vehicle functionality.
2Reliability
If anomaly detection checks are added to message format and timing, then communication security is improved, but the processing time and computational load increase
Solution Approach 1:
The system performs anomaly detection on specific critical parameters (message format, timing, signal parameters) rather than analyzing every possible aspect of communication data. This partial action approach provides sufficient security coverage while minimizing processing time and computational overhead.
Solution Approach 2:
The system changes the parameters being monitored to focus on the most critical ones for security (format validity, timing consistency, signal range) rather than all possible message attributes. This selective parameter monitoring achieves effective anomaly detection with reduced processing requirements.
3Measurement precision
If multiple checks are performed on each message (format, timing, signal parameters), then the detection precision of anomalies is improved, but the device complexity increases
Solution Approach 1:
The anomaly detection system is segmented into separate functional checks: format validation, timing analysis, and signal parameter verification. Each check operates independently on specific message attributes, making the overall system more manageable and maintainable while achieving high detection precision through multiple specialized checks.
Data Source
AI summary
A system for detecting a disruption in a communication system of a vehicle. The system includes a vehicle bus and an electronic processor. The electronic processor is configured to receive a message, from a vehicle bus. The message has a format and a plurality of signals. The electronic processor is configured to detect anomalies in a bus identifier, the message format, a time the message is received, and a signal parameter of a signal of the plurality of signals. The electronic processor is also configured to generate an error if an anomaly is detected in the message format, an anomaly is detected in the time the message is received, or an anomaly is detected in the signal parameter of the signal of the plurality of signals.