Ground wireless spread spectrum communication system for railway

Abstract

The embodiment of the invention relates to a ground wireless spread spectrum communication system for a railway. Each ground network node accesses a ground passive optical network through an ONU, andthen accesses a railway operation control center through an OLT and a railway dedicated communication network; a first ground network node group receives a first activation command issued by the railway operation control center through the railway dedicated communication network and the ground passive optical network, switches from a turn-off state to a monitoring state, and monitors the behaviorthat an onboard optical network communication node of a train transmits a first wireless spread spectrum communication signal; when the first wireless spread spectrum communication signal is monitored, a second wireless spread spectrum communication signal is transmitted; and the first wireless spread spectrum communication signal, authentication information of the ground network node group and azone code are transmitted to the railway operation control center to generate a second activation command, and the second activation command is issued to a second ground network node group that is arranged adjacent to the first ground network node group along the traveling direction of the train.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a ground wireless spread spectrum communication system for railways. Background technique [0002] As the speed of the train increases, it is impossible to guarantee the safety of driving by completely relying on the sight of people and manually driving the train. The railway-specific communication directly serves the transportation production. It effectively connects the railway as a whole, and plays a vital role in ensuring the smooth operation of the railway and its safety and punctuality. [0003] my country's railway lines are multi-point and long, with large changes in geographical environment, road conditions, and climate conditions, which make it more difficult to realize wireless communication for railway-specific communication, and it is difficult to build an effective and reliable wireless signal system. Especially with the continuous improvement of the speed of...

AI Technical Summary

Problems solved by technology

Long-distance wireless spread spectrum communication due to climate change, such as rain, snow, fog and other severe weather phenomena will not only reduce the quality of wireless spread spectrum communication, but even interrupt communication, so that wireless spread spectrum communication will lose the high-speed rail informatization and The status of an important supporting means of intelligence will directly lead to the failure of high-speed rail informatization and intelligence

[0006] In addition, interference can cause serious problems for rail applications

Interference will affect the results of wireless spread spectrum positioning. Because other wireless communications exist side by side in rail transit, such as artificial wireless blocking or unauthorized access points installed by other users near rail transit, it will interfere with the normal transmission of signals and even cause Communication interruption or serious error, affecting railway safety

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