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Train-ground wireless communication system and communication method

A technology of vehicle-ground wireless communication and communication method, applied in the field of vehicle-ground communication, can solve the problems of mutual interference of uplink and downlink lines, affecting communication quality, waste of frequency resources, etc., to ensure reliable operation, improve system reliability, and save costs. Effect

Pending Publication Date: 2020-03-27
SUBWAY OPERATION TECH R & D CENT BEIJING SUBWAY OPERATION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the section of the ground line and the elevated line, since the vehicle-mounted receiving antenna of the free wireless and leaky cable is installed on the roof, it is easier to receive external interference signals, and at the same time cause interference to the external system. In order to reduce the same frequency of the external system Interference, most rail transit owners can only choose a certain frequency band within 1.785GHz to 1.805GHz for use, but cannot use all of the 20MHz, resulting in a waste of frequency resources
In more serious cases, the uplink and downlink lines of the system will also interfere with each other, seriously affecting the communication quality

Method used

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  • Train-ground wireless communication system and communication method
  • Train-ground wireless communication system and communication method

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] A base station system in a vehicle-ground wireless communication system of the present invention, such as figure 2 As shown, it includes a base station, a power divider 2, a ground-facing rear antenna 4, a ground-forward antenna 41, and a slotted waveguide antenna 5. The slot waveguide antenna 5 is connected, and is used for communicating by two different types of communication modes of the ground antenna and the slot waveguide antenna, wherein the forward and backward in the ground-to-back antenna 4 and the ground-to-front antenna 41 are relatively speaking. The real front and back correspond to the direction in which the train is going. Setting two antennas in opposite directions can extend the transmission distance, reduce the number of base stations, and save costs.

[0027] Among them, the base station system is arranged on the trackside ground...

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Abstract

The invention discloses a train-ground wireless communication system and a communication method, which adopt different communication methods according to different positions of trains, and the methodcomprise a mode of adopting a ground antenna to carry out free communication in a tunnel section. At the exit of the tunnel, a method of coexistence of a ground antenna and a leakage cable is adoptedto carry out free communication and leakage wireless communication; and in the ground and elevated sections, a leakage cable is adopted for leakage wireless communication. In order to realize variouscommunication methods, different base station systems are arranged in different sections, and each base station system corresponds to different communication methods. According to the train-ground wireless communication method, two communication devices are arranged in the vehicle-mounted system according to the advantages of various communication modes in allusion to driving sections in differentexternal environments, and different communication modes are respectively adopted for communication, so that frequency bandwidth resources are effectively utilized, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of vehicle-to-ground communication, in particular to a vehicle-to-ground wireless communication system and a communication method. Background technique [0002] At present, the LTE system has the characteristics of high bandwidth, high mobility, long-range coverage, and high scalability. It can solve the problems of instability and poor mobility in existing wireless systems. It is currently widely used in rail transit vehicle-to-ground wireless communication systems. . The LTE frequency band available for the rail transit industry is 1.785GHz to 1.805GHz. At present, the application environment of rail transit is mainly divided into tunnel, ground and elevated. The tunnel can be regarded as a closed space, which basically has no interference from external different network systems, and the uplink and downlink lines are separated into two tunnels, so there is basically no interference between the uplink and ...

Claims

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Application Information

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IPC IPC(8): H04W4/44H04W88/06H04W88/10
CPCH04W4/44H04W88/06H04W88/10
Inventor 张衡刘硕赵辉
Owner SUBWAY OPERATION TECH R & D CENT BEIJING SUBWAY OPERATION CO LTD
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