Research on the Communication Management Mechanism of a Data-centric Vital Computer Platform for Rail Transit

Abstract

In the traditional rail transit signal system, the key subsystems are realized by the vital computer platform based on bus communication. On this platform, all devices share the same bus, so usually a variety of measures and a complex communication mechanism need to be implemented and designed. This not only seriously affects the efficiency and quality of software development, but also restricts the performance of bus communication with the increase of operation demand. Therefore, this paper proposes a data-centric communication management mechanism of vital computer platform for rail transit. The platform uses dual-network redundancy architecture, and all devices exchange data through Ethernet. With the application of a publish-subscribe message mechanism, the platform achieves loose coupling, greatly reduces the complexity of system development, significantly improves development efficiency and product quality, and realizes higher bandwidth and better communication performance. Experiments show that the data-centric vital computer platform features high throughput and low latency, which can meet the requirements of real-time and high-performance applications of rail transit signal systems.

Keywords

• vital computer platform
• publish-subscribe mechanism
• communication performance
• rail transit signal system