On Application Of802.11n In Metropolitan Track Transportation Systems

In recent years, with the rapid development of wireless LAN technology, IEEE802.11series has entered N technology era, IEEE802.11n transfer rate, high transmission quality of themany advantages, so whether these advantages can be better suitedhigh-speed car-groundcommunication environment of the urban rail transit, will be the direction of the focus of thisarticle.In addition, many wireless systems in Metropolitan Track Transportation system, such as:passenger information systems are running a public opening band in2.4G will also802.11nanti-jamming capability in the operating environment of the urban rail transit analysis.Passenger information system in Metropolitan Track Transportation system as animportant development in recent years, its functional positioning anchor operators appropriatespots the subway advertisement, weather forecasts, news, traffic, anti-terrorism securityinformation, emergency relief information in case of an emergency operations precedence trainmonitoring real-time image transmission principle. Car-wireless communication as importantsubsystem PIS system, bear to the ground control center issued a high-definition videostreaming data is transferred to the high-speed train running train video surveillance images inreal time back to the subway control center role as a bridge, then this article will combine car ofthe PIS systems analysis IEEE802.11n wireless LAN applicability PIS system-to communicatea detailed analysis and discussion in theory, at the same time by analog subway actual runningstate of802.11n various data tested and validated through theoretical and practical twoIEEE802.11n wireless LAN to adapt to the new generation of passenger rail transportationvehicles-communication requirements.