【作者】 阚庭明；

【导师】 王富章；

【作者基本信息】 中国铁道科学研究院 ， 交通信息工程及控制， 2013， 博士

【摘要】 随着全国城市化水平的逐步提高，城市轨道交通得以迅猛发展。作为为乘客提供信息服务的乘客信息系统在城市轨道交通建设中逐步应用、发展，提高了城市轨道交通的服务质量和运营水平。本文依托相关的研发项目和系统建设实践，运用理论与实践相结合、数学模型和逻辑推理分析相结合、系统集成和综合分析的方法，比较详细地对系统建设所涉及的技术体系进行阐述，并对其中的关键技术进行了深入研究，力求能够以实践为基础，寻求关键技术的理论突破，为今后系统的研究和建设提供参考。本文以城市轨道交通乘客信息系统为研究对象，重点研究系统及其关键技术，主要研究内容为：引入了线网控制中心PCC的概念，设计了新一代乘客信息系统的管理框架、功能定义及总体框架，是一套易扩展的、全线网的、SOA技术构建、基于分布式计算的平台框架，包括网络框架、系统接口和软件体系结构。与单线运营条件下乘客信息系统相比，能够更好地整合轨道交通内部、外部多种载体、媒体，为乘客和轨道交通运营管理、维护保障方面各层次的管理者提供全方位、全覆盖的信息服务系统。基于此框架进行设计开发，并用来指导工程实践。为解决既有乘客信息系统上传下载慢、在线查询观看效果不理想的诸多问题，将P2P技术引入乘客信息系统数据传输，实现了PIS系统超大文件的传输，解决了P2P技术在文件传输应用中种子资源不固定导致的不足，并结合流媒体技术，通过分析P2P技术下流媒体传输的关键问题，对所涉及的数据传输机制、定位与分发机制、容错优化机制及安全机制进行设计，对基于FTP和P2P进行超大多媒体文件分发处理做了分析比较，并给出了在此框架下的乘客信息系统拓扑模型，提高了视频点播、下载和传输的质量，优化了乘客的用户体验。为系统开发设计奠定基础。也为既有系统进一步升级优化提供了参考。在分析了三维渲染技术基础上，设计了消息中文字图片的渲染方法，可有效解决滚动字幕不平滑的缺陷；介绍了RSS发布模式和Quartz调度框架，设计了系统消息发布与调度机制，有效提高了信息显示效果。在分析轨道交通乘客信息系统车地无线传输系统特点的基础上，提出了新一代轨道交通乘客信息系统车地无线的传输需求；为满足新一代轨道交通乘客信息系统的应用要求，将IEEE802.11n标准引入乘客信息系统车地无线传输，并对系统网络结构进行优化设计，同时提出了列车快速移动情况下的快速漫游切换机制，以确保数据传输的连续性和可靠性；最后对高速无线网络架构下的乘客信息系统车地传输的稳定和安全性进行了分析，提出了PIS无线网络安全设计方案，建立起多层的安全保护机制，并进行了验证测试。研究结果表明，多种安全技术组合应用可以加强城市轨道交通PIS系统无线数据传输的安全性。开发了一套城市轨道交通乘客信息系统集成服务平台。描述了乘客信息系统集成服务平台的需求分析、总体设计、功能结构及功能构成，重点说明了媒体设计、媒体编辑及发布、媒体播放综合信息管理等子系统的模块组成及所实现的功能。平台采用先进的数字电视处理技术、P2P技术、消息处理发布技术等，可提供设计、编辑、预览、播放、用户管理，网络管理、设备控制管理等一系列功能。该平台的应用将会提高地铁运营管理水平，扩大地铁对乘客服务范围，以获得最大的社会效益和经济效益。在本文的最后，以北京地铁14号线乘客信息系统项目为背景，应用乘客信息系统集成服务平台，检测了集成服务平台的功能，验证集成服务平台的功能和应用效果。本文对乘客信息系统的技术体系进行了深入的研究，得到的绝大部分研究成果在系统建设中得到了验证，这些研究成果对今后系统的研究和建设提供重要的参考和借鉴，对于促进乘客信息系统理论体系的建立和实际系统的建设具有重要的理论和现实意义。更多还原

【Abstract】 With the accelerated process of urbanization, urban rail transit is developed rapidly.Passenger Information System (PIS), providing information services for passengers, isapplied in the construction of urban rail transit more and more. It plays a role in promotingthe service quality and operational level of urban rail transit. Based on related research,development projects and practical system construction, this dissertation aims to study thekey technology of PIS. The methods of combination of theory and practice, mathematicalmodeling and logical analysis and systems integration and comprehensive are used to seekthe theoretical breakthrough of key technology so as to provide reference for future researchand construction of system.This dissertation aims at the PIS of urban rail transit, in particular, the systematic keytechnology. The main research contents are as follows:1）The conception of PIS Control Center (PCC) is introduced. The managementframework, function definition and general structure are proposed, including networkstructure, inter-system interface and software architecture. The PCC is an easy expandingdistributed platform framework based on SOA technology in the whole subway network,including network structure, inter-system interface and software architecture. Comparingwith PIS under the independent line operation mode, this service platform can integrate bothinternal and external multi-media, and provide a comprehensive and full coverage ofinformation service system for passengers.2）In order to resolve the problem of slow upload/download and poor effect of onlinequery, Peer-to-Peer (P2P) technology is introduced. Realizing large file transfer and solvingthe shortage of the seed resources during file transmission. Combination with the streamingmedia technology, the identity authentication scheme, data distribution and transmissionmechanism, security mechanism and topology model are designed for the PIS. Comparingwith FTP and P2P distributed processing, the PIS framework under P2P topology model isgiven, improving the quality of the video on demand, download and transmission, andoptimized the passenger’s user experience. It not only lays the foundation for the further system development and design, but also provides a reference for further upgrades ofoptimization of existing system.3）Based on analyzing the3-D rendering technology, a rendering method of text andimage is designed, which can effectively solve the defect of not smooth scrolling marquee.In order to improve the efficiency of information transmission effectively, the news releasesystem and scheduling mechanism based on RSS publishing model and the Quartz schedulerframework are present.4）Based on the analysis of the rail transit passenger information system train-groundwireless transmission system characteristics, the proposal of train-ground wirelesstransmission (TGWT) based IEEE802.11n for PIS is proposed. Based on analyzing thecharacteristics of TGWT, the requirement for the new generation of PIS is introduced. Withthe IEEE802.11n, the system network structure is optimized. In order to the continuity andreliability of data transmission, a rapid roaming switching mechanism is considered into theproposal. At the end, the stability and security of this TGWT proposal are analyzed,proposing PIS wireless network security design, building multi-layered security protectionmechanisms, and carrying out verification tests. The results show that the combination ofmultiple security technologies can enhance the application of urban rail transit PIS systemwireless data transmission security.5）Developing an integration platform of PIS. The requirement, overall design, systemstructure and function of PIS integration service platform are proposed, especially about themedia design, editing and publishing, the media comprehensive information managementmodules. The advanced digital television processing technology, P2P technology andmessage processing technology are used in this platform. Considering the accessibilitycompatibility of PIS system, SOA architecture is adopted to collect the data from each line.The network construction and operation of is the development trend of PIS. The integrationservices platform will further advance the line network broadcast control center constructionand improvement. It will increase the level of operational management, and expand on thesubway passenger services, in order to get the maximum social and economic benefits. At the end of this dissertation, to Beijing Subway Line14PIS project as background,the PIS integration services platform is implemented to test the functions and applicationeffect.This dissertation conducted in-depth research on PIS key technology. The majority ofthese research results obtained in system construction have been verified. These findings areimportant reference for future research and construction systems to promote of passengerinformation establishment of systems theory and the actual construction of the system hasimportant theoretical and practical significance.更多还原