Wireless CBTC (Communication Based Train Control) determines the train position through wireless communication, thereby realizing the operation control of the train. Wireless CBTC represents the development direction of rail transit signal systems. The advancement of the system depends largely on data communication and wireless data network technology. The data communication system is a subsystem of the wireless CBTC system. The system provides a network communication platform for vehicle-to-ground data transmission, realizing safe, efficient and reliable data transmission of train operation control information. Compared with the traditional TBTC (Track Based Train Control) system, the biggest technical advantage of wireless CBTC is that it realizes real-time, large-capacity two-way communication between trains and trackside equipment through wireless communication technology, and realizes continuous control of trains. Wireless Ethernet technology based on open standards is mature, advanced, and has low commercial costs. It has obvious advantages in vehicle-to-ground mobile communications. The application of wireless Ethernet technology in the train operation automatic control system is of great significance for the networked operation of urban rail transit, saving investment in rail transit construction, improving transportation efficiency, improving operation quality, and facilitating system upgrades and maintenance.
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