English
Currently, the GSM-R system is the main technology of China's high-speed rail mobile communication system. However, GSM-R belongs to narrow-band communications, and not only has high cost of construction, but also the complexity of network optimization.Spanish
En la actualidad, el sistema GSM - R es la principal tecnología del sistema de comunicaciones móviles ferroviarias de alta velocidad en China.Sin embargo, GSM - R pertenece a la comunicación de banda estrecha, no sólo el costo de construcción es alto, sino también la optimización de la red es compleja.
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