Log Transmission Controller Priority Update
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Solution Overview
Problem
In vehicles equipped with communication functions for V2X technologies, cyber-attacks can hinder control systems, and existing log transmission methods are inefficient due to resource constraints and network load, leading to potential loss of critical logs during the time it takes to update priority and transmit them to a server.
Innovation Solution
A log collection system with a log transmission controller that acquires logs, updates priority information based on instructions from both in-vehicle and server-side updates, and transmits logs to a server prioritized by updated priority, ensuring timely and efficient collection of critical logs for cyber-attack analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all logs are transmitted to the server, then complete log analysis is achieved, but network load increases and resource constraints are exceeded
Solution Approach 1:
The system applies different transmission strategies to different logs based on their priority levels. Critical logs (high priority) are transmitted immediately, while non-critical logs are handled differently, allowing the system to manage network load while maintaining essential log analysis capability
Solution Approach 2:
Logs are segmented into different priority levels (critical and non-critical), enabling selective transmission to the server. This segmentation allows the system to transmit only essential logs during high-network-load conditions, preventing resource overload while maintaining analysis completeness for critical events
2Manufacturing precision
If priority update time is extended, then accurate priority assignment is achieved, but log loss risk increases
Solution Approach 1:
The system performs preliminary actions by immediately transmitting logs with high priority before completing the full priority update process. This ensures that critical logs are not lost during the time it takes to propagate priority updates throughout the system, while still allowing for accurate priority assignment to be completed
Solution Approach 2:
The system implements feedback mechanisms where the server receives priority information and can send back acknowledgments or corrections. This feedback loop ensures accurate priority assignment while minimizing the time logs remain in transit, reducing the window of vulnerability to log loss
3Speed
If in-vehicle update instructions are implemented, then rapid response to cyber-attacks is achieved, but system complexity increases
Solution Approach 1:
The system extracts and processes only the essential priority update instructions from the complex stream of in-vehicle data. By filtering and extracting only the critical priority information needed for immediate log transmission, the system achieves rapid response while managing the complexity of processing multiple update instructions
Solution Approach 2:
An intermediary processing layer is introduced between the in-vehicle update instructions and the log transmission logic. This intermediary component simplifies the processing by pre-processing and normalizing update instructions, making the system more responsive to cyber-attack detection while reducing the complexity burden on the core transmission system
Data Source
AI summary
A log transmission controller includes a log acquirer, a priority storage, an update instruction acquirer, a priority updater and a transmitter. The log acquirer acquires a log indicating respective states of electronic control units connected to the log transmission controller, which is equipped in a moving object. The priority storage stores priority information indicating a priority for transmitting the log to a server, which is disposed at exterior of the moving object. The update instruction acquirer acquires an update instruction, which is generated by an update instructor equipped in the moving object, for instructing to update the priority information stored in the priority storage. The priority updater updates the priority information based on the update instruction. The transmitter transmits the log to the server based on the priority indicated by the updated priority information.