Design And Implementation Of Information Distribution System Based On Internet Of Vehicles

Internet of Vehicles (IOV) is one of the main branches of Internet of Things (IOT), whichis generally used in the Intelligent Transportation System (ITS).In order to connect all the staticand dynamic information of cars and roads via the Internet, signal and information processingtechnology, message distribution technology, sensing and recognition technology, data miningtechnology and network communication technology are synthetically applied to IOV. As aresult, a large-scale, large-capacity and multiple-dimension data fusion of the system can beachieved and thus the number of road accidents reduces and the efficiency of traffic resourceallocation is improved. Typical IOV services are mainly divided into three categories, includingtraffic safety services, traffic data collection and distribution services, and entertainmentinformation services. However, there are still open challenging issues in IOV at present, suchas unsatisfying communication quality, low data rate, conflicted concurrent access andunattactive business model. An efficient information distribution system is highly demandedas a fundemantal to solve the aforementioned issues.WAVE (Wireless Access in Vehicular Environment) communication protocol stacktechnology and LAMP (Linux+Apache+MySQL+Python) architecture, which plays animportant role in improving the service quality of IOV, are studied in this paper. The analysisof their characteristics is also presented. The design of system can be divided into three steps:1) considering a huge quantity information and a short communication time, a three-tierdesign scheme for the IOV information distribution system is proposed;2) regarding the IOVrapidly changing communications environment and the poor communication qualitycharacteristics, the WAVE stack is used as a underlying communication protocol;3) for the IOVhuge number of Internet users and the high concurrent access, a LAMP-based Web networkcenters is proposed. Based on the proposed system design scheme, the implementation of IOVinformation distribution system’s network center, road side unit RSU and vehicle unit OBU andtheir respective sub-module is investigated.Compared with the traditional information systems, IOV information distribution systemproposed in this paper discards the traditional C/S architecture and uses the three-tier systemwhich is more suitable for the IOV environment. The WAVE communication protocol stack isused as a basis communication protocol in IOV information distribution system, while the high-performance and high-concurrency LAMP architecture is used as building Web network Center.The system is built and verified. The results show that the prototype system can achieve goodperformance, in which point-to-point communication transmission bandwidth is about12 Mbit/s, the server meets200-500onboard unit OBU online access at the same time. The IOVinformation distribution system, as an integral part of ITS, has a practical significance to newintelligent transportation systems.