Multiple train-ground wireless communication system and communication method thereof

Abstract

The invention discloses a multiple train-ground wireless communication system and a communication method thereof. Vehicle-mounted signal equipment arranged at a vehicle head communicates with trackside signal equipment through two vehicle-ground wireless communication links of a first wireless communication network at the same time; the vehicle-mounted signal equipment arranged at the tail of thevehicle is communicated with the trackside signal equipment through two vehicle-ground wireless communication links of a second wireless communication network at the same time; when data are sent, a special communication channel selection device copies signals sent by the vehicle-mounted signal equipment or the trackside signal equipment and then sends the signals to the two vehicle-ground wireless communication links for transmission. When data is received, the special communication channel selection device optimizes signals transmitted through the two train-ground wireless communication links. According to the invention, the availability and reliability of train-ground communication are higher, the anti-interference performance is stronger, and the transmission performance is better.

Description

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

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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