Dual Channel RSSP-I Communication for Rail Transit Data Security
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Solution Overview
Problem
Existing rail transit signal systems face challenges in ensuring data security and reliability due to high requirements for multi-channel timing synchronization and resource consumption, which are exacerbated by increasing data scales and timeliness demands.
Innovation Solution
A communication method based on dual channels and the RSSP-I protocol, where configuration data is initialized on dual CPUs, and messages are sent and received according to the RSSP-I protocol, allowing for independent security code calculations and reduced resource consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant architecture with multi-channel consistency comparison is adopted to ensure data security, then reliability is improved, but device complexity and resource consumption increase
Solution Approach 1:
The system is divided into two independent channels (Channel A and Channel B), each with separate CPUs and configuration memory. This segmentation allows independent operation of each channel while maintaining overall system reliability through comparison of results, reducing the complexity of centralized security verification.
Solution Approach 2:
A third-party arbitration device is introduced as an intermediary to perform consistency comparison of security verification words from different channels. This mediator handles the complex comparison logic externally, simplifying the main control system's complexity while ensuring data security through independent verification.
2Reliability
If third-party arbitration hardware is used to ensure consistency correctness, then reliability is improved, but device complexity and hardware dependency increase
Solution Approach 1:
The patent introduces a third-party arbitration device that independently verifies the consistency of security verification words from multiple channels. This intermediary component ensures correctness without being part of the original system architecture, maintaining reliability while providing flexible hardware configuration options.
Solution Approach 2:
The system creates duplicate computational paths (Channel A and Channel B) with identical functionality but independent implementation. Each channel independently calculates security verification words, and the arbitration device compares these copies to ensure correctness, eliminating single-point failures without requiring complex inter-channel communication.
3Productivity
If hardware upgrading is performed to meet increasing data scale and timeliness requirements, then productivity is improved, but device complexity and cost increase
Solution Approach 1:
The system employs dynamic configuration where Channel A and Channel B can be flexibly assigned different functions (e.g., one for normal operation, one for safety-critical functions). This dynamic adaptability allows the system to meet varying data scale and timeliness requirements through software configuration rather than hardware upgrades, maintaining productivity while controlling complexity.
Data Source
AI summary
The invention relates to a communication method based on dual channels and RSSP-I, an apparatus, an electronic device and a storage medium. The method comprises the following steps: 1. initializing configuration data, and loading independent configuration information on dual CPUs; 2. sending a message according to the RSSP-I communication protocol; and 3. receiving the message according to the RSSP-I communication protocol. Compared with the prior art, the invention has the advantages of being capable of guaranteeing the security and reliability of data processing.