Urban rail transit not only relieves the pressure of urban traffic, but also facilitates the travel of the urban population. In many urban rail transit systems, the signal system is called the brain of urban rail transit, which is an important guarantee to ensure the safety of train operation and realize driving command.
The signal system requires real-time and accurate information transmission between vehicle-ground systems, so the construction of a safe and reliable large bandwidth and low-latency vehicle-ground communication network has become the consensus of the subway industry. With the maturity of LTE private network, LTE-M private network has become an indispensable subsystem in the urban rail transit signal system. With the commercial use of 5G networks, some urban rail transit has begun to try to use 5G networks to achieve vehicle-ground communication.
With its profound technical accumulation in the communication industry and its understanding and practice of urban rail transit business, CICT Mobile puts forward a solution for rail transit vehicle-to-ground wireless communication system based on 4G LTE and 5G NR technology.
Give full play to the characteristics of 4G LTE and 5G NR in high bandwidth, low latency and large connection in high-speed mobile state, and can be used as an effective communication transmission means of column control and column service.
It can also carry real-time high-definition surveillance video back transmission services for cars and driver's cab, or carry the PIS business to provide real-time news, advertising, TV programs and other services for passengers. In the future, it can also carry other informatization, intelligent and other applications of rail transit.
The vehicle-site wireless communication system can carry the control, scheduling and video multi-network integration services, and reduce the repeated construction of WLAN and Tetra networks.
The LTE-M network uses a dedicated frequency band of 1.8G, supports a variety of empty ports and end-to-end encryption methods to meet the high security requirements of data.
Support equipment-level and network-level multi-level redundant backup, and the system reliability is higher than 99.99% to ensure the safety of train operation;
Ultra-reliable, low latency 5G network helps more accurate, safe and efficient automatic driving control;
Enhanced mobile broadband 5G network can improve the service capacity of subway operation video services;
Massive machine communication 5G networks will greatly enrich the comprehensive monitoring methods of the subway and enhance the maintenance and support capabilities.
Urban rail transit not only relieves the pressure of urban traffic, but also facilitates the travel of the urban population. In many urban rail transit systems, the signal system is called the brain of urban rail transit, which is an important guarantee to ensure the safety of train operation and realize driving command. The signal system requires real-time and accurate information transmission between vehicle-ground systems, so the construction of a safe and reliable large bandwidth and low-latency vehicle-ground communication network has become the consensus of the subway industry. With the maturity of LTE private network, LTE-M private network has become an indispensable subsystem in the urban rail transit signal system.
