Onboard Network Anomaly Alerts for Unauthorized Frame Response
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Solution Overview
Problem
In automotive onboard networks, there is a risk of unauthorized ECUs transmitting frames, potentially leading to vehicle control issues and accidents, as existing systems lack effective methods to detect and handle such anomalies, especially in connected car scenarios where inter-vehicle communication systems do not adequately address abnormalities within vehicles.
Innovation Solution
An anomaly handling method and electronic control unit (ECU) system that detects unauthorized frames in onboard networks, transmits anomaly detection notifications, and selects appropriate handling processes based on received notifications to mitigate unauthorized control effects, including stopping, slowing, or maintaining distance, thereby reducing accident risks and traffic disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inter-vehicle communication systems are used to exchange information among vehicles, then safety of traffic system is improved, but ability to detect and handle abnormalities within vehicles is insufficient
Solution Approach 1:
The patent introduces an anomaly detection notification as an intermediary signal that bridges intra-vehicle anomaly detection and inter-vehicle communication. When an ECU detects an unauthorized frame, it generates this notification which is then transmitted to other vehicles, enabling the wider system to respond to local abnormalities without requiring direct monitoring of all internal vehicle networks.
Solution Approach 2:
The system segments the anomaly detection and handling functions across multiple levels: individual ECUs detect unauthorized frames, the anomaly detection ECU processes these detections and generates notifications, and receiving vehicles execute handling processes. This segmentation allows each component to focus on specific tasks while maintaining overall system safety.
2Reliability
If anomaly detection and handling processes are implemented across multiple vehicles, then effects of unauthorized control are suppressed, but device complexity increases
Solution Approach 1:
The patent implements partial action by having only the anomaly detection ECU in each vehicle responsible for generating and transmitting anomaly notifications, rather than requiring all ECUs to perform full detection and handling functions. This reduces overall system complexity while maintaining effective anomaly suppression through coordinated response.
3Reliability
If unauthorized frames are detected and notifications are transmitted to other vehicles, then accident risks are reduced, but loss of time occurs due to anomaly handling processing
Solution Approach 1:
The patent applies preliminary action by having receiving vehicles prepare multiple predetermined anomaly handling processes in advance. When an anomaly detection notification is received, the system can immediately select and execute the appropriate pre-prepared handling process without requiring time-consuming analysis or decision-making during the actual anomaly response, thus reducing time loss while maintaining effective accident prevention.
Data Source
AI summary
An anomaly handling method using a device installed outside of a vehicle is disclosed. The method includes receiving, from the vehicle, an anomaly detection notification, which includes level information indicating a level affecting safety, and a location of the vehicle. The method also includes obtaining a location of another vehicle and determining whether a distance between the location of the vehicle and the location of the other vehicle is within a predetermined range. When the distance is within the predetermined range and is shorter than a first predetermined distance, not changing the level information and transmitting the received anomaly detection information to the other vehicle. When the distance is within the predetermined range and is longer than or equal to the first predetermined distance, changing to decrement a level indicated by the level information, and transmitting changed anomaly detection information to the other vehicle.