面向车联网应用的信息发布系统的设计与实现
发布时间：2018-12-27 17:13
【摘要】：车联网技术隶属物联网技术的范畴，主要应用于智能交通系统（ITS，IntelligentTransport System）。作为智能交通系统的典型运用，，车联网技术综合使用了信号与信息处理技术、消息分发技术、遥感与识别技术、数据挖掘技术、网络接入与控制技术等，把道路和车辆的各种动、静态信息通过互联网连接起来，从而实现多个维度的系统大规模、大数据的信息融合，最终起到减少道路事故、优化交通资源配置的作用。车联网典型的应用服务主要分为交通道路安全服务、交通数据采集分发服务以及娱乐信息服务三大类。但是目前基于车联网的信息发布系统普遍存在通信质量差、传输速率低、系统并发访问差，业务单一等问题。智能交通领域上缺乏提供完善服务的车联网信息发布系统。 首先，本文研究了两种有助于提高车联网应用服务质量的关键技术，即WAVE(Wireless Access in Vehicular Environment)通信协议栈技术以及LAMP（Linux+Apache+MySQL+Python）架构的网络服务平台架设技术，并简要的分析这两种关键技术的特性。其次，在针对车联网信息数量多、数据量大、通信时间短的特点，提出了三层架构的车联网信息发布系统的构建方案；针对车联网通信环境快速多变、通信质量差的特点，设计了以WAVE协议栈作为信息发布系统的底层通信协议的方案；针对车联网用户数量庞大，车联网网络中心并发访问需求高的特点，设计了基于LAMP架构的Web网络中心的方案。最后，再根据本文提出的系统设计方案，详细描述信息发布系统的网络中心、路侧单元RSU（RoadSideUnit）和车载单元OBU(OnBoardUnit)三个层次中各个功能子模块的具体实现方法。 与传统信息发布系统相比，车联网信息发布系统摒弃了此前常用的C/S架构，使用本文提出的适合车联网环境的三层架构体系，以WAVE协议栈作为系统通信基础，采用高性能高并发量的LAMP构建Web网络中心。经测试实验证明，本文所设计的雏形系统，其点对点通信传输带宽约为12Mbits/s，单服务器可满足200-500个车载单元OBU同时在线访问。该车联网信息发布系统能满足面向车联网应用的服务需求，对构建新型的智能交通具有一定的实践意义。
[Abstract]:Vehicle networking technology belongs to the scope of Internet of things technology, mainly used in intelligent transportation systems (ITS,IntelligentTransport System).) As a typical application of intelligent transportation system, vehicle networking technology uses signal and information processing technology, message distribution technology, remote sensing and identification technology, data mining technology, network access and control technology, etc. All kinds of dynamic and static information of road and vehicle are connected through the Internet, so as to realize the large-scale system of multiple dimensions and big data's information fusion, which ultimately play a role in reducing road accidents and optimizing traffic resource allocation. The typical application services of vehicle networking are divided into three categories: traffic road safety service, traffic data collection and distribution service and entertainment information service. However, there are some problems such as poor communication quality, low transmission rate, poor concurrent access, single service and so on. In the field of intelligent transportation, there is a lack of vehicle networking information publishing system to provide perfect services. First of all, this paper studies two key technologies to improve the quality of service (QoS) of vehicle networking applications, that is, WAVE (Wireless Access in Vehicular Environment) communication protocol stack technology and network service platform erection technology based on LAMP (Linux Apache MySQL Python) architecture. The characteristics of these two key technologies are analyzed briefly. Secondly, aiming at the characteristics of large amount of vehicle networking information, large amount of data and short communication time, this paper puts forward a construction scheme of three-tier vehicle networking information publishing system. Aiming at the characteristics of fast and changeable communication environment and poor communication quality, a scheme of using WAVE protocol stack as the bottom communication protocol of information publishing system is designed. In view of the large number of users and the high demand for concurrent access to the vehicle network center, a scheme of Web network center based on LAMP architecture is designed. Finally, according to the system design scheme proposed in this paper, the detailed description of the information distribution system network center, road side unit RSU (RoadSideUnit) and vehicular unit OBU (OnBoardUnit) three levels of each functional sub-module implementation method. Compared with the traditional information publishing system, the vehicle networking information publishing system abandons the C / S architecture, and uses the three-tier architecture which is suitable for the vehicle networking environment, and takes the WAVE protocol stack as the system communication basis. LAMP with high performance and high concurrency is used to construct Web network center. The experimental results show that the peer-to-peer communication bandwidth of the prototype system is about 12Mbits / s, and the single server can meet the requirements of 200-500 on-board OBU simultaneous online access. The system can meet the service demand of the vehicle network application, and it has some practical significance to build a new type of intelligent transportation.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495;TN929.5;TP391.44
本文编号：2393358
[Abstract]:Vehicle networking technology belongs to the scope of Internet of things technology, mainly used in intelligent transportation systems (ITS,IntelligentTransport System).) As a typical application of intelligent transportation system, vehicle networking technology uses signal and information processing technology, message distribution technology, remote sensing and identification technology, data mining technology, network access and control technology, etc. All kinds of dynamic and static information of road and vehicle are connected through the Internet, so as to realize the large-scale system of multiple dimensions and big data's information fusion, which ultimately play a role in reducing road accidents and optimizing traffic resource allocation. The typical application services of vehicle networking are divided into three categories: traffic road safety service, traffic data collection and distribution service and entertainment information service. However, there are some problems such as poor communication quality, low transmission rate, poor concurrent access, single service and so on. In the field of intelligent transportation, there is a lack of vehicle networking information publishing system to provide perfect services. First of all, this paper studies two key technologies to improve the quality of service (QoS) of vehicle networking applications, that is, WAVE (Wireless Access in Vehicular Environment) communication protocol stack technology and network service platform erection technology based on LAMP (Linux Apache MySQL Python) architecture. The characteristics of these two key technologies are analyzed briefly. Secondly, aiming at the characteristics of large amount of vehicle networking information, large amount of data and short communication time, this paper puts forward a construction scheme of three-tier vehicle networking information publishing system. Aiming at the characteristics of fast and changeable communication environment and poor communication quality, a scheme of using WAVE protocol stack as the bottom communication protocol of information publishing system is designed. In view of the large number of users and the high demand for concurrent access to the vehicle network center, a scheme of Web network center based on LAMP architecture is designed. Finally, according to the system design scheme proposed in this paper, the detailed description of the information distribution system network center, road side unit RSU (RoadSideUnit) and vehicular unit OBU (OnBoardUnit) three levels of each functional sub-module implementation method. Compared with the traditional information publishing system, the vehicle networking information publishing system abandons the C / S architecture, and uses the three-tier architecture which is suitable for the vehicle networking environment, and takes the WAVE protocol stack as the system communication basis. LAMP with high performance and high concurrency is used to construct Web network center. The experimental results show that the peer-to-peer communication bandwidth of the prototype system is about 12Mbits / s, and the single server can meet the requirements of 200-500 on-board OBU simultaneous online access. The system can meet the service demand of the vehicle network application, and it has some practical significance to build a new type of intelligent transportation.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495;TN929.5;TP391.44
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