TCMS is like an invisible hand, coordinating the control, monitoring and diagnosis between the central control unit and various subsystems such as traction, braking, auxiliary power supply, air conditioning, lighting, etc.; summarizing the working status and fault diagnosis information of each subsystem, providing information display and human-machine interaction interface
The “Nerve Center” of High-Speed Trains
As the “nerve center” of high-speed trains, TCMS can send instructions to key components of trains, receive information, control, diagnose, monitor and protect trains anytime and anywhere. It reflects a country’s research and development capabilities and level in railway communications.
The main function of TCMS is to connect the various subsystems on high-speed trains through the network to achieve communication and information sharing. When we board a high-speed train, the driver’s driving, train broadcasting, door opening and closing, video playback, air conditioning, vehicle sealing, etc. are all handled by TCMS, which makes the train more “smart”.

For example, when the driver moves the control handle to the traction position, the central control unit of the TCMS will issue a traction command and transmit it to each traction control unit through the train network to make the train traction system work.
Silent “Data Flow”
In order to make high-speed trains run fast and stable, TCMS adopts a two-level bus – train-level bus (Wire Train Bus, abbreviated as WTB) and vehicle-level bus (Multifunction Vehicle Bus, abbreviated as MVB).

Data is transmitted between the two-level buses through the train communication network gateway (TCN). The train communication network system is a network system that connects on-board equipment, realizes information sharing, and can be controlled, monitored, and diagnosed. It is also widely used in urban rail vehicles.
The train-level bus transmits the key data of the vehicle-level bus to the central control unit; the vehicle-level bus and input and output modules are responsible for realizing data exchange between each subsystem and the central control unit. In addition, there is an Ethernet train bus – the Ethernet switch in each car is connected to various devices to realize data exchange.

The “Chinese Brain” of High-Speed Trains
Communication relies on communication equipment, just like Internet access requires network cards and gateways, and the “nerve center” of high-speed trains requires the support of chips and communication protocols. In recent years, my country’s railway experts have independently developed chips and network cards, and written the source code of all network software, giving high-speed trains a “Chinese brain”.
In order to ensure the effectiveness of the “nerve center” in actual applications, China’s railway experts completed the research and development of the semi-physical simulation platform of the high-speed train network control system in just one year, which not only filled the domestic gap, but also reached the international advanced level.
At the same time, TCMS unifies data transmission specifications and network communication protocols, which allows high-speed trains of different speed levels to run in parallel, and high-speed trains of different speed levels to rescue each other, improving the utilization efficiency of high-speed trains and reducing operating costs.
The intelligent Future of the “Nerve Center”
In the future, TCMS will become smarter and more intelligent. Through new technologies such as cloud computing, big data, and artificial intelligence, intelligent operations such as remote automatic driving, sleep, wake-up, dynamic and static self-test, obstacle detection, and reset of trains can be realized.
Super Nanny and Intelligent Navigation
In the future, after collecting and summarizing data from various systems, TCMS can realize intelligent fault warning, remote monitoring, and diagnostic analysis through deep learning. It is like a super nanny and intelligent navigation, paying real-time attention to the “physical health” and operation of the train, discovering problems in advance, and taking measures.
Intelligent Intercom
At present, different types of high-speed trains cannot “communicate”, just like strangers. In the future, we will usher in the era of intelligent marshaling. TCMS, like an intelligent intercom, can make high-speed trains become “good partners” that can understand each other, easily “chat”, and cooperate intelligently.
With the rapid development of science and technology, TCMS is about to usher in an unprecedented technological feast, injecting new vitality into the high-speed rail industry!