The Metro Digital Information Platform Based On High-Speed Wireless Network

In recent years, the metro developed rapidly, many cities have entered from a single line operation to the network operation time. This paper attempts to use the framework of the Metro Digital Information Platform to solve the problem the operating company need to face under the situation of network operating and informatization, such as the different experience in different line, overlapping investment of equipment, the transparency of operating information and other issues.This paper first analyzes the technical indicators and present application of the existing train-ground wireless communication scheme in the subway tunnel environment, determine to use TDD-LTE technology as the scheme of subway train-ground wireless communication in Metro Digital Information Platform. Then, detailed design the deployment plan of LTE system, including system architecture, signal coverage design, system switching, and so on. Due to there’s only one metro line use the LTE technology in commercial operation all over the world, namely, the Zhengzhou Metro Line 1 which open by the end of 2013, and it’s LTE scheme can only provide the wireless transmission of passenger information system and vehicle video monitoring service, not including the signal system which is still using the traditional WLAN wireless network, this paper analyzes if LTE technology can be a plan to carrying all wireless network business in metro, especially the CBTC system wireless transmission.With a high-speed wireless communication network, this paper proposes and designs a framework of Metro Digital Information Platform, through establish the Operating Information Center to integrate and process the operation information data and build the operation information database. According to the demand of the platform and the subway system interface design, this paper integrates the transferring process of subway information to improve the management level of the subway operation company. At the same time, research on how to use the new media such as micro-blog to expand the traditional nformation dissemination channels, and improve the coverage and transparency of operating information, give passengers more convenient travel experience, and enhance the operating company for the emergency handling ability at the same time.Finally, aiming at the key technology of the Metro Digital Information Platform, this paper simulates a program of the further development based on the operating information database, it successfully achieves the desired function, confirms the advanced and the feasibility of the platform, and provides the theory foundation for the promotion of the...