Vehicle Network Segmentation for Abnormality Detection
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Solution Overview
Problem
Existing vehicle-mounted network systems lack improved security measures to effectively detect and mitigate abnormalities in communication networks, as described in Patent Literature 1 and 2.
Innovation Solution
A vehicle-mounted communication system with a data acquisition device that acquires data from the control network and transmits it to a management device connected to a security network, allowing for partial isolation of communication paths to detect and manage abnormalities, thereby enhancing security by minimizing the impact of control network abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If communication paths are isolated to improve security, then security is improved, but communication efficiency deteriorates
Solution Approach 1:
The communication system is divided into a control network and a security network, with the data acquisition device bridging them. This segmentation allows security monitoring functions to be isolated from the main control network, improving security without significantly impacting control network efficiency.
Solution Approach 2:
The data acquisition device acts as an intermediary between the control network and security network. It selectively acquires and transmits data, enabling security monitoring while maintaining control network performance through intelligent data filtering and selective communication.
2Measurement precision
If data acquisition device continuously monitors all data, then detection precision is improved, but energy consumption increases
Solution Approach 1:
The data acquisition device performs partial monitoring by selectively acquiring data based on predetermined conditions rather than continuously monitoring all data. This reduces energy consumption while maintaining effective abnormality detection through targeted data collection.
Solution Approach 2:
The system uses feedback mechanisms where the management device sends requests for specific data based on detected abnormalities, and the data acquisition device adjusts its monitoring focus accordingly. This feedback-driven approach optimizes energy usage by concentrating monitoring resources on relevant data streams.
Data Source
AI summary
A vehicle-mounted communication system is mounted in a vehicle and includes a plurality of functional units connected to a control network in the vehicle and a management device connected to a security network in the vehicle. Communication from the control network to the security network is partially limited. The vehicle-mounted communication system further includes a data acquisition device that acquires data transmitted through the control network and transmits the data to the management device. The management device detects an abnormality related to the control network based on the data received from the data acquisition device.