铁路网络仿真模拟系统的研究及软件开发

t present, the CTCS-3 train operation control system uses the GSM-R network to communicate with the RBC equipment of the ground wireless block center. Aiming at the shortcoming that the wireless network in the train control system cannot meet the test requirements, the GSM-R network simulation system is designed and implemented, which is a lightweight and highly stable system. The system is mainly composed of SDR transceiver, BTS simulation module, PBX simulation module and digital relay voice card. The SDR transceiver module sends and receives wireless data and modulates and demodulates the data. The BTS simulation module processes the baseband signal and processes the data. For forwarding, the PBX simulation module completes protocol conversion and V.110 rate adaptation, and sends circuit-domain data to the ISDN server through the digital relay voice card to realize data communication between the train and the ground. The system has been experimentally tested and can establish the call link process within 1s, and can run stably to ensure data transmission.