无线局域网技术在城市轨道交通中的优化研究与实现

发布时间：2018-04-09 15:25

本文选题：无线局域网　切入点：乘客信息系统　出处：《华北电力大学》2013年硕士论文

【摘要】：乘客信息系统（Passenger Information System），简称PIS。是运用网络技术和多媒体技术进行信息多样化显示的系统。乘客信息系统（PIS），能够让乘客在乘车过程中，得到实时消息和相关部门发布的通知公告以及服务、娱乐、咨询信息，同时信息的双向传递有利于轨道交通管理部门掌握车厢的实时动态，更加有针对性的提供服务和帮助、处理突发事件、遏制盗窃犯罪、及时有效的为乘客提供帮助和服务。体现了轨道交通部门对乘客的关怀，提高了用户的满意度、幸福度以及出行效率。本文分析乘客信息系统的功能需求，研究分析了乘客信息系统的功能结构：控制中心子系统、车站控制子系统、车地无线子系统、网络子系统。本文对PIS系统中的各系统功能及组成进行了细致的研究，分析设计了PIS的各子系统的实现架构，并且完成可以实际应用的乘客信息系统PIS。在实际应用中，，该系统运行良好，可以对指定多媒体信息进行编辑、制作、传输，并通过车站或车载显示器，为地铁乘客提供以列车到离站信息、多媒体信息为主，商业广告为辅的综合信息显示，具有信息多样性、实时性、可集中控制管理的特点。由于列车的高速移动，在无线局域网中如何保证信息的低延迟、高带宽、安全性成为研究的焦点。本文对比分析了常用的无线传输标准及组播、MIMO、Mesh、VLAN等常用技术，研究了带宽的优化方案和技术、车载AP在区间的切换方案、抵抗干扰的解决方案、安全保证等方案，并且制定了切实可行的勘测方案。通过在项目中的实际勘测、对比、研究得到了可以应用在PIS中的满足列车高速移动的无线网络。该车地无线网络具有高数据传输率、切换延时低、安全性高等特点。在实际的应用中，确保了高清视频的流畅播放和实时数据的传递。
[Abstract]:Passenger Information system passenger Information system.Is the use of network technology and multimedia technology for the diversity of information display system.The passenger Information system (PISS) enables passengers to receive real-time messages and notices issued by relevant departments, as well as services, entertainment and consultation information, during the ride.At the same time, the two-way transmission of information is conducive to the rail transit management department to grasp the real-time dynamics of the carriage, more targeted to provide services and help, deal with emergencies, curb theft crime, timely and effective to provide help and services for passengers.It reflects the care of the rail transit department to the passengers, and improves the satisfaction, happiness and travel efficiency of the users.This paper analyzes the functional requirements of passenger information system, studies and analyzes the functional structure of passenger information system: control center subsystem, station control subsystem, vehicle-ground wireless subsystem, network subsystem.In this paper, the functions and components of the PIS system are studied in detail, and the implementation framework of each subsystem of PIS is analyzed and designed, and the passenger information system (Pi), which can be applied in practice, is completed.In practical application, the system runs well, and can edit, produce, transmit and provide train to departure information, multimedia information for subway passengers through station or on-board display.The comprehensive information display supplemented by commercial advertisement has the characteristics of diversity of information, real-time, centralized control and management.Due to the high-speed movement of trains, how to ensure the low delay, high bandwidth and security of information in WLAN has become the focus of research.This paper compares and analyzes the commonly used wireless transmission standards and commonly used technologies such as Multicast Mimo / MeshVLAN, and studies the optimization scheme and technology of bandwidth, the switching scheme of on-board AP in the interval, the solution of resisting interference, and the scheme of security guarantee, etc.And made the feasible investigation plan.Through the actual survey and comparison in the project, the wireless network which can be used in PIS to satisfy the high-speed movement of train is obtained.The vehicle-ground wireless network has the characteristics of high data transmission rate, low handover delay and high security.In practical applications, the smooth playback of HD video and the transmission of real-time data are ensured.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：U29-39;TN925.93

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