【作者】 张勇；

【导师】 宁帆；

【作者基本信息】 北京邮电大学 ， 电子与通信工程， 2010， 硕士

【摘要】 智能公交系统是建立在全球定位技术、无线通信技术、地理信息技术、网络技术、计算机技术、自动控制技术、软件技术综合运用基础上的,实现公交企业营运生产调度信息化、自动化、智能化的高科技管理系统。由于CDMA系统具有保密性、抗干扰性、软切换、传输速率快等特性,因此利用CDMA 1X无线网络传输数据能够为智能公交系统提供实时、准确的数据,同时利用CDMA 1X系统特有的GPSONE技术为车辆提供准确的定位信息。本文中的智能公交系统正是利用GPSONE技术获取定位信息,CDMA1X网络传输数据,VPDN接入方式获取数据,统计分析公交车运行信息,制定相应系统调度策略,为乘客提供实时公交乘车信息,使公交运营企业及时掌握车辆整体运行情况；既提高了企业运营效率,又方便了人们出行。本文详细介绍了目前智能公交系统的现状,并以我市智能公交系统项目为案例,详细介绍了此工程的设计原则、系统的分层结构以及各层结构实现的方法方式及相关算法；同时对此工程的试运营结果作测试,并指出项目存在的不足以及后期需改进的地方。本文的主要内容有：1、确认公交集团对智能公交系统的需求,提出了智能公交系统的解决方案,制定系统需实现的具体功能。2、利用电信的CDMA 1X网络,实现以GPSONE、AFLT以及BSA数据库为技术基础的车辆定位方式,为智能公交系统提供位置信息。3、对智能公交系统的结构进行层次划分,确定各层模块的功能。4、对智能公交系统各层模块进行设计及实现。5、对系统进行了测试,确定系统实施的可行性以及存在的问题。此智能公交系统自试运行之日起,系统运行正常,验证了本文理论的正确性。更多还原

【Abstract】 Intelligent transportation system (ITS) is a high-tech management system, which is based on the integrated use of global positioning technology, wireless communication technology, geographic information technology, networking technology, computer technology, automatic control technology and software technology. It helps bus companies achieve informationization, automatization and intelligentization in operating and scheduling.As CDMA system has advantages such as privacy, anti-jamming, soft-handoff and fast-transfer, real-time and accurate data could be provided for intelligent transportation system by using CDMA 1X wireless network to transmit data. Besides, accurate location information could be provided for vehicles by using GPSONE which is the specific technology of CDMA.Intelligent transportation system in this article, using GPSONE to obtain location information, CDMA IX networks to transfer data, VPDN access methods to obtain data, statistical analysis of bus operation information to develop appropriate systems scheduling policies, providing passengers with real-time information on bus fare, bus operating companies to grasp the overall operation of vehicles; not only improve the operational efficiency of enterprises, but also easy for people going out.This paper describes the current status of intelligent transportation systems and intelligent transportation system project to the city as a case study, detailing the design principles of this project, the system’s hierarchical structure and the layers of the implementation of the method and associated algorithms; the same time this project assessed the results of trial operation, and that the project areas for improvement later.The main contents of this paper:1. To confirm the demands of the bus group for intelligent transportation systems, and propose solutions and functions.2. Use of telecommunications in the CDMA 1X network in order to provide vehicle’s location information based on GPSONE, AFLT and the BSA database technology for intelligent transportation system.3. To divide hierarchy of intelligent transportation system, and determine the functions of each layer module.4. To design and implement the hierarchy module of the intelligent transportation system.5. The system was tested to determine the feasibility of system implementation and problems.From the date of trial operation, the intelligent transportation system operated normally. It verified the correctness of the theory.更多还原