地铁乘客导乘系统中的无线局域网络技术

基于目前地铁安全和实时信息更新的需求,指出带无线车载系统的地铁乘客导乘系统是未来发展的趋势;说明可以通过无线通信,实现车地之间视频和数据信息的高速传递.对多个带无线通信的导乘系统项目中采用的技术进行分析,总结实施过程中的经验;认为影响导乘系统性能的因素是:无缝切换、频率规划、无线网络安全、无线接入节点(AP)的选定.

Analysis of WLAN Technology in Metro Passenger Information System

In view of the requirements on security in metro and on real time updating of information from customers, the on-board wireless passenger information and direction system is the trend of development in the future. This article shows that rapid transmission of videos and data can be fulfilled between the train and the platform through wireless communication. An analysis on the techniques adopted in several on-board wireless passenger information and direction systems leads to the conclusion that there are four factors affecting the functions of this system, namely: seamless handover, frequency planning, security of wireless network, and location of access points.