论文部分内容阅读
现有城市轨道车地无线网络的三大主要问题当前城市轨道交通中的行车指挥、列车控制、乘客资讯、列车视频监控等业务由于用户需求的发展和技术水平的限制,只能通过窄带无线或公共频段独立组网,解决车地通信传输需求,主要存在三大问题:公共频段易干扰,导致非预期停车频发和直播视频质量低。CBTC(基于通信的列车控制系统)、PIS(乘客资讯系统,含车载视频监控)车地无线网络主流使用2.4G WLAN覆盖,因其
The three main problems of existing urban rail car wireless network The current urban rail traffic command, train control, passenger information, video surveillance and other services due to the development of user needs and technical limitations, only through narrow-band wireless or There are three main problems in solving the problem of communication and transport of vehicles and land in the public frequency bands: interference in the public frequency band easily leads to frequent unintended parking and low quality of live video. CBTC (Communication Based Train Control System), PIS (Passenger Infotainment System, Car Video Surveillance Included) Wireless networks in the car use 2.4G WLAN coverage because of its