GPRS数据传输技术及其在ITS中的应用

【作者】 李相银；

【导师】 曾连荪；

【作者基本信息】 上海海事大学 ， 通信与信息系统， 2004， 硕士

【摘要】 随着信息化社会的发展，移动通信已经渗透到日常生活的每一个细节，现有的话音业务已不能满足各种信息通信的需求，移动数据通信业务作为一种新兴的业务得到日益广泛的应用。由中国移动运营的GPRS网络正是在这种大环境下诞生并发展壮大起来的。作为新型移动分组数据承载业务，其速率可达到115kbps，它允许业务用户在端到端分组转移模式下发送和接收数据，而不需要利用电路交换模式的网络资源。同时，GPRS网络的底层是基于TCP／IP协议，能够与Internet无缝连接。 而GPRS数据通信业务的主要应用领域之一的智能交通系统(ITS)也得到日新月异的发展。交通状况是衡量一个城市信息化的重要指标之一，2008年北京奧运会和2010年上海世博会的召开是对中国主要大城市的一次考验。上海信息化委员会正在筹备长三角定位导航信息基础设施的建设工作。本课题就是在这种大背景下进行的一项先期研究工作。 本论文主要研究了GPRS数据传输方式，并就它的一个主要应用领域——智能交通系统的基本结构、主要功能和实现方式上进行了初步探讨。构建了导航定位系统车载设备、在PC机上实现了导航定位系统服务中心的基本功能。 论文第一章首先探讨了几种无线数据传输方式和国内外智能交通系统发展状况，随后介绍了论文的选题背景及做的主要工作；在第二章中研究了课题所需的主要技术，包括GPRS数据传输技术、GPS定位技术和DSP(数字信号处理)技术等关键技术；第三章介绍了基于GPRS／DSP的车辆导航定位系统的服务中心工作原理和车载终端的工作原理；论文开发并实现了车辆导航定位系统的车载终端设备，包括GPS定位信息接收、处理和通过GPRS网络传输的实现，另外，论文还实现了服务中心的基本功能，这是在论文第四章中所作的主要工作；最后，在第五、六、七章中，论文分析了开发实验中存在的问题及解决方法，论文还需要进一步做的工作以及得出的结论。 本论文完成了导航定位系统车载设备样机的研制工作，实现了服务中心的基本功能；成功的利用GPRS网络进行数据传输，并就GPS定位信息的数据处理方法上进行了理论探讨，达到了预期的目的。更多还原

【Abstract】 With the development of the information-society, the mobile-communication has penetrated each aspect of the life. The present Voice-Service can’t meet the demand of the communication. The mobile data communication was widely used as a new service. GPRS (General Packet Radio Service) Network managed by China Mobile is developed in this environment. GPRS data transmission rate is up to 115kbps, it permits subscriber to receive and transfer data in P2P (Peer to Peer) packet-transfer mode without needing the network sources in circuit-switch mode. Otherwise the low layer of the GPRS is based on TCP/IP protocol and can connect the Internet without leak.ITS (Intelligent Traffic System), one of the most popular application of GPRS data service, is also widely used. Traffic status is one of the most important scale of a city. With the celebration of Olympic Games 2008 and Expo 2010, the two main city of China will face the test of traffic status. Shanghai Informatization Committee is preparing to construct the long-triangle Navigation system. This item is the pre-study work under this background.The thesis mainly studies the mode of GPRS data transmission, and discuss the basic structure, main function and realization way of ITS, moreover construct the Vehicle terminal equipment and Service center of the navigation system.The first chapter discusses several wireless transmission modes and the development national and international, and then introduces the background of the thesis. In the second chapter, the thesis studies the main technique needed by the task, which consist the key technique, such as GPRS data transmission mode, GPS position technique and DSP (digital signal process) technique etc. The third chapter introduces the principle of the Vehicle Navigation Position System. In addition the thesis develops and realizes the Vehicle terminal equipment of the Vehicle Navigation Position System, which be composed of receiver, procession and transmission of GPS position information. These work is studied in forth chapter. At last, in fifth, sixth and seventh chapter, the thesis analyses the problem occurred in practice and development and gives the solution. Otherwise, the thesis gives the next step on the research and gets a conclusion of the work.The thesis accomplishes the study work of The Navigation Location Systemvehicle sample device and realizes the basic function of Service Center. Furthermore we succeed in transmitting data via GPRS network, and discussing the data process method of GPS location information. In a word, the thesis gets what we wanted.更多还原