WiFi performance analysis in high-speed railway communication

In High-Speed Railways (HSRs), the Train Control and Management System (TCMS) plays a crucial role. However, as the demand for train networks grows, the limitations of traditional wired connections have become apparent. This paper designs and implements a Wireless Train Communication Network (WTCN) to enhance the existing train network infrastructure. To address the challenges that wireless communication technology faces in the unique environment of high-speed rail, this study first analyzes various onboard environments and simulates several typical scenarios in the laboratory. Integrating the specific application scenarios and service characteristics of the high-speed train control network, we conduct measurements and validations of WiFi performance, exploring the specific impacts of different factors on throughput and delay. • A Wireless Train Communication Network was designed for CR400 EMU, adding a wireless communication sensing system without affecting the existing wired network. • The communication requirements, influencing factors, and applicability of different communication technologies were analyzed under various conditions, simulating a high-speed train carriage communication scenario in the lab. • A testing plan was developed to evaluate the communication performance of two WiFi bridges in the laboratory-simulated environment. • Actual throughput and delay communication measurement data were presented in the laboratory-simulated environment instead of simulation results.