车载自组网路由恢复方法的研究

发布时间：2018-06-30 08:32

本文选题：车载自组网 + 路由恢复　；参考：《合肥工业大学》2014年硕士论文

【摘要】：车载自组网(Vehicle Ad hoc Network, VANET),是移动自组网的一个分支,车载自组网是把行驶的车辆转化为移动节点,利用车辆间的通信,形成一个无线移动网络,已经成为汽车移动物联网的基础。作为智能交通的重要部分,车载自组网在提高交通的安全性、交通的效率和提供第三方服务等方面起到了重要作用,受到越来越多的重视,成为研究的热点。文中在分析了车载自组网路由协议的国内外研究现状、车载网络通信系统结构以及常用的车载自组网移动模型的基础上,研究了一种网络分割的解决方法。该方法引入了网络分割率的概念,车辆节点通过计算网络分割率的大小,选择网络分割率较小的车辆节点来恢复路径,从而提高路由恢复成功率和分组转发成功率,解决车载自组网中由于网络拓扑结构的动态变化,而引起的网络分割的问题；进一步研究对于不同方向行驶的车辆,针对移动自组网路由协议在用于车载自组网时路由恢复延迟长、效果差的问题,研究了一种分布式的路由恢复方法。该方法中车辆节点通过计算链路的可靠性值,来选择可靠的路径进行路由恢复,方法中路由的恢复过程是一种按需驱动方式,车辆寻找资源的过程就是路由建立的过程。文中采用宏观的高速公路车流运动模型,在NS2下建立了车载自组网络仿真场景,在不同速度、不同车辆密度等条件下对所提出的路由恢复算法进行仿真实验,算法有效地降低了路由恢复延迟和开销,提高了路由恢复成功率和路径生存时间。
[Abstract]:Vehicle Ad hoc Network (VANET) is a branch of Mobile Ad hoc Network (Manet). Vehicular Ad Hoc Network (VANET) is a wireless mobile network, which transforms the moving vehicle into a mobile node and forms a wireless mobile network by means of the communication between the vehicles. It has become the basis of the mobile Internet of things of the vehicle. As an important part of intelligent transportation, vehicle-mounted ad hoc network has played an important role in improving traffic safety, traffic efficiency and providing third-party services. It has attracted more and more attention and become a hot research topic. Based on the analysis of domestic and international research status of vehicular ad hoc network routing protocol, the structure of vehicular network communication system and the mobile model of vehicular ad hoc network, a solution to network segmentation is studied in this paper. In this method, the concept of network segmentation rate is introduced. By calculating the size of the network segmentation rate, the vehicle nodes with small network segmentation rate are selected to restore the path, thus improving the success rate of route recovery and packet forwarding. To solve the problem of network segmentation caused by the dynamic change of network topology in vehicle-mounted ad hoc networks, and to further study the vehicle driving in different directions, A distributed routing recovery method is proposed to solve the problem that the routing delay is long and the effect is poor when the routing protocol is used in vehicle-mounted ad hoc networks. In this method, the vehicle node chooses the reliable route to restore the route by calculating the reliability value of the link. In the method, the route recovery process is a kind of on-demand driving mode, and the process of vehicle searching for resources is the process of route establishment. In this paper, based on the macroscopic freeway traffic motion model, the simulation scene of vehicle-borne ad hoc network is established under NS2, and the simulation experiment of the proposed routing recovery algorithm is carried out under different speed and different vehicle density. The algorithm can effectively reduce the delay and overhead of route recovery, and improve the success rate of route recovery and the survival time of route.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495

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