Vehicle Control Unit State Comparison for Server Transmission Integrity
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Solution Overview
Problem
Existing systems fail to efficiently detect complete transmission of security-related data from vehicles to vehicle-external servers, making it difficult to identify manipulations or interruptions in data transmission.
Innovation Solution
A method and system that utilize a vehicle-external server to receive data transmissions from control units, determine a reference control unit state during production, compare it with an actual state, and detect deviations to identify interruptions or manipulations, using cryptographic certificates and unique identifiers to ensure data integrity and completeness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transmission from vehicle control units to external servers is performed without verification mechanisms, then transmission speed and simplicity are improved, but data integrity and completeness cannot be guaranteed
Solution Approach 1:
The system performs preliminary actions by determining the actual control unit state from received data transmissions and comparing it with the reference control unit state before finalizing the transmission verification. This advance checking mechanism ensures data integrity is verified proactively, preventing undetected transmission interruptions or manipulations while maintaining efficient data flow.
Solution Approach 2:
The system implements feedback by continuously monitoring and comparing the actual control unit state derived from transmitted data against the known reference state. When deviations are detected, the system can trigger alerts or requests for retransmission, creating a closed-loop verification system that ensures data integrity without significantly impacting transmission efficiency.
2Reliability
If verification mechanisms are implemented to check data transmission completeness, then data integrity is improved, but system complexity increases
Solution Approach 1:
The verification system utilizes self-service by leveraging existing data transmissions from control units to determine the actual control unit state. Instead of requiring separate verification transmissions or additional hardware, the system extracts and analyzes information from the regular data flow itself, performing self-verification without adding significant system complexity.
Solution Approach 2:
The system creates a virtual copy of the control unit state information from the transmitted data and compares it with the reference state stored in the external server. This copying approach allows verification without physically duplicating control units or creating complex redundant hardware systems, maintaining simplicity while ensuring integrity.
3Difficulty of detecting and measuring
If the system monitors and compares control unit states to detect deviations, then detection capability is improved, but processing time increases
Solution Approach 1:
The system replaces complex mechanical or procedural verification methods with automated electronic state comparison. By using digital state representations and algorithmic comparison between actual and reference states, the system achieves high detection capability for transmission interruptions while minimizing processing time through efficient computational operations.
Solution Approach 2:
The system changes the verification approach from monitoring individual data packets to comparing overall control unit states. This parameter change from packet-level to state-level verification reduces the complexity and time required for detection, as state comparison provides a holistic view of transmission integrity without requiring exhaustive analysis of each transmitted element.
Data Source
AI summary
A method for detecting an interruption in a data transmission from a vehicle to a security-related function of a vehicle-external server includes receiving a data transmission of one or more control units of the vehicle using the security-related function of the vehicle-external server, and receiving a reference control unit state of the vehicle using the vehicle-external server. The method also includes determining an actual control unit state of the vehicle depending on the received data transmission, and checking for a deviation of the actual control unit state of the vehicle from the reference control unit state of the vehicle. The method further includes detecting an interruption in the data transmission of one or more control units of the vehicle to the security-related function of the vehicle-external server responsive to a determination that the deviation of the actual control unit state from the reference control unit state is present.