Rail Vehicle Control Software Checksum Verification
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Solution Overview
Problem
Current methods for authorizing control software in rail vehicles across multiple countries are inefficient, requiring frequent changes and re-authorization, leading to increased costs, complexity, and maintenance burdens due to country-specific regulations and the need for redundant memory systems and time-intensive reloading of programs.
Innovation Solution
A method that generates a unique overall checksum for the control software based on function-dependent and structure-dependent checksums, allowing for easy identification and verification of changes, enabling country-specific adaptations without altering the software's structure, and maintaining existing authorizations by using a country-specific checksum for verification and authorization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If country-specific control software is kept on the rail vehicle and reloaded at borders, then authorization for different countries is achieved, but device complexity increases due to redundant memory systems and multiple controllers
Solution Approach 1:
The control software is segmented into a country-identifying component and a functional component. The country identifier is stored in a compact form (e.g., single byte) rather than duplicating entire software versions, significantly reducing memory requirements while maintaining the ability to adapt to different countries' regulations.
Solution Approach 2:
A single controller is designed to handle multiple countries' requirements through a universal architecture that uses the country identifier to dynamically adjust behavior. This eliminates the need for multiple dedicated controllers for different countries, reducing device complexity while maintaining versatility.
2Adaptability or versatility
If control software is reloaded at national borders, then country-specific authorization is achieved, but loss of time occurs due to time-intensive reloading process
Solution Approach 1:
The country identifier is determined and processed in advance before the actual control software execution. By pre-identifying the country and loading only the necessary country-specific parameters rather than entire software versions, the system minimizes border crossing delays while ensuring proper authorization.
Solution Approach 2:
The country-specific authorization information is extracted from the full control software into a separate, compact country identifier. This allows the system to quickly switch between countries by only loading the essential identifier and corresponding parameters, rather than reloading complete software versions, significantly reducing the time required at borders.
3Ease of manufacture
If standardized control software is used across multiple countries, then manufacturing cost is reduced, but authorization verification becomes more complex due to different country rules
Solution Approach 1:
The control software is designed with local quality by incorporating a country identifier that enables the same standardized software to adapt to different local regulations. The country-specific parameters and rules are applied locally based on the identifier, allowing manufacturers to produce a single standardized version while maintaining compliance with various country-specific requirements through configuration rather than code changes.
Data Source
AI summary
A method identifies and verifies control software of a rail vehicle. In the method, the control software is formed by functions, with each function fulfilling an associated task. As a networked collective, the functions form the structure of the control program. A function-dependent checksum is generated for each function. A structure-dependent checksum is generated for the structure. A total checksum is generated for the control software from the function-dependent checksums and the structure-dependent checksum. The total checksum identifies and verifies the control software for homologation in a country.