Train-ground data communication method

A data communication, vehicle-to-ground technology, applied in wireless communication, data exchange network, digital transmission system, etc., can solve the problems of high capital investment and post-maintenance costs, inflexible implementation methods, etc., to improve system availability, avoid congestion and Delay, reduce complexity effects

Active Publication Date: 2012-02-15
INST OF COMPUTING TECH CHINA ACAD OF RAILWAY SCI +2
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Problems solved by technology

This technology has high performance, but the cost of capital investment and later main

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  • Train-ground data communication method

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Embodiment Construction

[0031] The data communication method between the train and the ground proposed by the present invention is described in detail as follows in conjunction with the accompanying drawings and embodiments.

[0032] This embodiment takes the data communication between the EMU and the central server of the Ministry of Railways as an example. The two use the public safety platform of the Ministry of Railways as a transmission channel, adopt the method of the present invention, and realize a high-load and high-concurrency network based on an asynchronous communication exchange mode. Such as figure 1 As shown, the data communication method between the train and the ground according to an embodiment of the present invention includes steps:

[0033] S1. The on-vehicle client sends a network connection to the ground system. The network connection includes the identity of the on-board client, which is the train group number of the EMU in this embodiment;

[0034] S2. The main thread of th...

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Abstract

The invention discloses a train-ground data communication method, relating to the technical field of computer network communication. The method comprises the following steps that: S1, network connection is sent by a train-mounted client end to a ground system, wherein the network connection comprises the identity of the train-mounted client end; and S2, the received network connection is registered into a network connection management queue through the ground system, and a time stamp is added; data to be transmitted back corresponding to the network connection of higher priority is obtained from a backward transmission queue according to the priority of the network connection in the network connection management queue and the state of a communication channel between the grounding system and the corresponding train-mounted client end, the data is transmitted back to the train-mounted client end corresponding to the network connection of higher priority, and the time stamp of the data to be transmitted back is added into the backward transmission queue. By adopting the method, a high-load and high-concurrency network system can be realized, and the purposes of low complexity, high data security, good timeliness and high accuracy can be achieved. Moreover, the method is stable and reliable.

Description

technical field [0001] The invention relates to the technical field of computer network communication, in particular to a data communication method between trains and ground. Background technique [0002] At present, my country's high-speed railway construction has entered a period of rapid development. The number of EMUs is large, and the number of communications with the ground data center is large. The network system often faces the problem of high load and large concurrency. When the EMU is moving at high speed, the network communication is faced with serious Doppler frequency shift effect, which will seriously affect the stability and reliability of data communication, resulting in a large number of packet loss, abnormal termination of network connection, and severe fluctuation of data transmission rate. When the train is running at high speed, the ground system needs to be able to monitor and control the speed of the train in real time and continuously, grasp various f...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04L12/56H04L47/6275H04W4/04
Inventor 朱建生单杏花阎志远张志强贾成强汪健雄
Owner INST OF COMPUTING TECH CHINA ACAD OF RAILWAY SCI
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