Vehicle Log Segmentation for Low-Bandwidth Anomaly Detection
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Solution Overview
Problem
In-vehicle network logs transmitted to external servers require significant data communication resources due to their large size and variability, making it difficult to detect unauthorized data infiltration effectively.
Innovation Solution
A vehicle log transmission device that divides vehicle logs using IDs associated with data types, generating divided logs and determining which ones match existing logs, thereby reducing data transmission by only sending identifiers for matching logs and the actual data for non-matching logs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vehicle logs are transmitted in their original large size to external servers, then complete log data is available for analysis, but data communication resources are significantly consumed and processing becomes difficult
Solution Approach 1:
The patent segments vehicle logs into multiple divided logs based on message IDs, allowing selective transmission of only necessary segments to external servers, thereby reducing overall data communication volume while maintaining analysis capability
Solution Approach 2:
The patent extracts and transmits only the essential portions of log data (specific divided logs containing anomaly information) to external servers, leaving redundant complete log data in the vehicle, thus reducing communication burden while preserving detection effectiveness
2Reliability
If all divided logs are transmitted to the server, then complete log data is available for analysis, but the amount of data to be transmitted remains large
Solution Approach 1:
The patent performs preliminary comparison of divided logs with previously transmitted logs before actual transmission, identifying and eliminating redundant data in advance, thus reducing the volume of data that needs to be transmitted while ensuring complete log availability for analysis
3Ease of operation
If divided logs are compared with existing logs using predetermined size division, then data matching is simplified, but the likelihood of matches is low due to log variability
Solution Approach 1:
The patent changes the division parameter from fixed predetermined size to dynamic message ID-based segmentation, which adapts to the actual structure and variability of vehicle logs, thereby improving both match accuracy and comparison efficiency
Data Source
AI summary
A vehicle log transmission device includes: a vehicle log division processor that generates one or more divided logs; existing identifier storage that stores an existing identifier list, which is a list of identifiers corresponding to existing divided logs generated by dividing an existing vehicle log shared between the vehicle log transmission device and a vehicle log analysis server; a vehicle log transmission necessity determiner that determines that a divided log corresponding to an identifier present in the existing identifier list is a first divided log, and that a divided log corresponding to an identifier not present in the existing identifier list is a second divided log; and a vehicle-side communicator that transmits the identifier corresponding to the first divided log to the vehicle log analysis server, and transmits the second divided log to the vehicle log analysis server.