Vehicle Security Sensor Log Management for ECU Sleep States
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing log management systems in vehicles fail to accurately determine the operational status of security sensors due to sleep functions in electronic control units (ECUs), leading to uncertainties in identifying cyber-attacks, and unnecessary communication of liveness signals increases network load.
Innovation Solution
A log management device that generates liveness monitoring function detection logs based on the reception status of liveness monitoring logs, reducing the need to transmit actual liveness signals and enhancing the accuracy of cyber-attack detection by analyzing operation start and stop of security sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If liveness monitoring logs are continuously transmitted to monitor security sensor operation, then the accuracy of determining sensor operational status is improved, but the network communication load increases
Solution Approach 1:
The patent extracts only the essential operational status information from continuous liveness monitoring logs and transmits it as condensed detection logs only when status changes occur. This removes the unnecessary continuous transmission of redundant data while preserving the critical operational status information needed for accurate monitoring.
Solution Approach 2:
Instead of continuous transmission, the system transmits liveness monitoring information periodically or event-drivenly only when operational status changes are detected. This periodic action reduces network communication load while maintaining accurate monitoring capability by transmitting data only when necessary.
2Use of energy by moving object
If sleep functions are implemented in ECUs to reduce power consumption, then energy efficiency is improved, but the ability to accurately determine security sensor operational status deteriorates
Solution Approach 1:
The system performs preliminary analysis of liveness monitoring logs locally within the ECU to detect operational status changes before transmission. This preliminary action allows the ECU to enter sleep mode more aggressively while still maintaining the ability to accurately determine sensor status by processing data locally and only transmitting when changes are detected.
Solution Approach 2:
The ECU autonomously monitors its own security sensor operational status using liveness monitoring logs and self-manages the transmission decisions. This self-service capability allows the system to reduce power consumption by keeping the ECU in low-power states while maintaining accurate status determination through local log analysis.
3Measurement precision
If detailed liveness monitoring logs are transmitted to provide comprehensive operational status information, then the accuracy of cyber-attack detection is improved, but the communication volume increases
Solution Approach 1:
The patent applies local quality by transmitting detailed operational status information only for specific security sensors or time periods where cyber-attack suspicion exists, rather than uniformly transmitting all monitoring data. This localized approach maintains high detection accuracy for critical events while reducing overall communication volume by avoiding unnecessary transmission of normal operational data.
Data Source
AI summary
A log management device includes a detection log reception unit configured to receive a detection log indicating a detection result of a security sensor of an electronic control unit mounted on a vehicle, a liveness monitoring log reception unit configured to receive a liveness monitoring log indicating that the security sensor is operating, a liveness monitoring function detection log generation unit configured to generate a liveness monitoring function detection log indicating an operation start and an operation stop of the security sensor based on a reception status of the liveness monitoring log, and an output unit configured to output the liveness monitoring function detection log and the detection log received during a first period.