Research And Implementation Of Wi-Fi Service Network Architecture For Rail Transit

The background of the rapid development of mobile Internet, wireless city construction is just unfolding, the domestic part of the city began offering Wi-Fi hotspot access service in city rail traffic platform and train. In addition to providing mobile access to Wi-Fi hotspots train passenger terminal, also need to provide the vehicle wireless communication means to vehicle network connecting the ground network to facilitate passenger’s access to the internet. The performance of vehicle wireless communication network, including bandwidth, packet loss rate and handover latency, and Internet experience is closely related to the passengers.This subject mainly studies the original passenger information system based on is completed by the addition of a Wi-Fi system transformation, after the transformation of the passenger information system, for the convenience of passengers waiting, travel, in the platform of the station, station hall is equipped with the display of the passenger service information system, allowing passengers to the display screen to keep abreast of the status of train and the matters needing attention. At the same time, the system provides Wi-Fi access for passengers, passengers can access the network through mobile phone client, feel with the times and fresh culture.In order to verify in real electromagnetic environment, 802.11 ac rail transit passenger information service platform vehicle wireless communication system based on availability, in Tieke ring road of EMU test, the test focuses on the performance of WLAN car 802.11 ac wireless communication network.At present, China’s mobile Internet mobile network to achieve full tide surge high and sweep forward, the environment is put in the unprecedented important position.As the focus of commercial Wi-Fi mobile network, the public degree is high, the importance of commercial Wi-Fi access to subway line stability and security of the increasingly prominent. The Wi-Fi system access to metro line design overall technical scheme, and tested in the real environment, to meet the requirements of the development of rail transportation informatization in china.