The Design Of Integrated Service Platform For Subway Passengers Information System

With the rapid development of economy, big city traffic jam becomes moreand more serious, the traffic supply and demand contradiction are increasinglyoutstanding also, more convenient city orbit traffic resulting in a major city tocarry out large-scale construction.Passenger information system based on rail traffic passenger service, toprovide diversified information services. But now rely on network technology,taking the computer system as the core, to the station and vehicle displayterminal for the media to provide passengers with one-way data traditionalpassenger information service, has been unable to meet the growing passengerand operating information interaction requirements.Wireless local area network as a wired LAN extension, can providecommunication between train and the ground, Passenger information system forvehicle wireless communication must be able to ensure train running at80km/h.The case, can the effective bandwidth of not less than30Mbps rate in trainoperation control center server and bidirectional transmission of video and datainformation, and can guarantee the lowest latency, while ensuring the train APwith trackside AP when switching to "0" loss, to meet the real-time vehicle-Information interaction.This paper analyses the technology based on the802.11a/b/g series of wirelessdata transmission mode, the minimum effective bandwidth to meet thetransmission requirement of foundation, improve the vehicle-WirelessDesign,Put forward based on wireless local area network, can provide real timecommunication between train and ground surface system, designed bytraditional covers only the hall of the station platform, one-way informationrelease platform as the foundation, expand to cover the complete passenger routeof city space (including the Internet, mobile communication network, mobile TV,broadcasting etc.) and space (subway station, the entrance, the station hall,platform, train) the integrated information platform. The integrated informationservice from the unidirectional broadcast into a two-way interaction, theinformation content of the propagation vector comprises a multimedia large screen, big screen splicing, self-service inquiry terminal, real-time videomonitoring information, and Metro broadcast mobile TV.The new passenger information system design with a plentiful of two-wayinformation to meet the needs of the passengers on the lane, media, and query avariety of information services, at the same time, solve the case of equipmentfailures, fires, terrorist attacks and other emergency operations side of the lanewithin the real-time video surveillance.