The Optimization And Implementation Of Train-ground Data Transmission Strategy Based On Wireless Communication Networks

With the rapid development of economic construction, a huge railway transport network has been formed in our country. Railway freight is great in transport capacity, flexible in planning, low in price and long in distance, thus enjoying a bright prospect for development. On the other hand, railway freight, especially of the transportation of dangerous goods, bears high risk. Therefore, it is of great necessity for the equipment of appropriate monitoring systems in railway freight. Moreover, the effective prevention of accidents entails real-time and reliable data exchange between train and ground. At present, the most widely employed network in China’s railway wireless communication is GPRS, which is infamous for its weak signal and poor transmission accuracy. What’s worse, the new-generation network is inadequate to be applied in railway communication for its small coverage areas. Therefore, it is highly necessary to optimize the data communication strategy to improve the efficiency of data exchange between train and ground in terms of applied software.This paper is to analyze the problems involved in wireless network transmission between train and ground, and then to categorize the problems in question with the real-time performance and the reliability of data transmission as two criteria. Moreover, this paper aims to improve the strategy for data communication in terms of applied software, with a view to enhancing the reliability and real-time performance of date communication between train and ground. In terms of the reliability, the data integrity is guaranteed by the verification of data packets and the employment of applied data transmission handshake mechanisms, and the favorable data transmission environment by the monitoring mechanism of wireless communication modules. In terms of the real-time performance, the signal detection mechanism is utilized to improve the efficiency and success rate of data transmission the data transmitted in sorts to improve the real-time performance of data transmission, the data compressed to reduce the amount of the data transmitted and the broken-point continuingly-transferring used to improve the efficiency of data re-transmission In addition to the optimization in terms of application, this paper also aims to enhance the real-time performance of date communication through an alternative data communication method, namely, BeiDou communication module. Finally, this paper offers a systematic description of the implementation and results of the optimization strategy for date communication with CGN Nuclear Safety Escort&Surveillance System as an instanceCGN Nuclear Safety Escort&Surveillance System developed by our laboratory has been applied in China Guangdong Nuclear Power Company and proves effective in operation.