A multiple vehicle-ground wireless communication system and communication method thereof

Abstract

A multi-vehicle-ground wireless communication system and a communication method thereof. The vehicle-mounted signal equipment arranged at the front of the vehicle simultaneously communicates with the trackside signal equipment through two vehicle-ground wireless communication links using the first wireless communication network, and the vehicle-mounted signal equipment is arranged at the rear of the vehicle. At the same time, the vehicle-mounted signal equipment communicates with the trackside signal equipment through two vehicle-ground wireless communication links using the second wireless communication network. When sending data, the dedicated communication channel selection equipment sends the vehicle-mounted signal equipment or the trackside signal equipment After the signal is copied, it is sent to the two vehicle-ground wireless communication links respectively for transmission; when receiving data, the dedicated communication channel selection device optimizes the signals transmitted through the two vehicle-ground wireless communication links. The invention enables higher availability and reliability of vehicle-ground communication, stronger anti-interference performance and better transmission performance.

Description

technical field [0001] The invention relates to a multiple vehicle-ground wireless communication system and a communication method thereof. Background technique [0002] At present, most of the domestic subway lines use the CBTC signal system. The CBTC signal system realizes the transmission of train control information between vehicles and trackside signal equipment based on communication. Two sets of mutually redundant train-to-ground wireless networks are generally used between the trackside and the vehicle. The early lines adopted two sets of train-to-ground wireless networks of the WIFI scheme, and the newly built lines generally adopted two sets of train-to-ground wireless networks of the LTE-M scheme. [0003] Compared with the traditional fixed block signal system, the mobile block adopted by the CBTC system can achieve higher operational efficiency. The train-ground wireless communication system of the CBTC system is the key system to realize the reliable communica...

AI Technical Summary

Problems solved by technology

The 1.8GHz frequency band of LTE-M is adjacent to the mobile DCS frequency band, and there will be mutual interference in adjacent frequency areas. When the interference is strong, it may also affect the normal operation of subway lines.

[0008] After one of the two sets of vehicle-ground wireless networks fails or is interfered, there is only single-network communication between the vehicle and the ground, and the reliability of the CBTC system will be significantly reduced

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