基于位置信息的车载网络路由优化方法研究

发布时间：2018-05-14 12:03

本文选题：车载Adhoc网络 + 方向优先　；参考：《东北大学》2015年硕士论文

【摘要】：车载Ad Hoc网络是移动Ad Hoc网络的一个具体应用。但是,车辆节点移动速度快,移动方向多变,移动路径受道路状况限制,致使其网络拓扑结构变化剧烈,路由链路稳定性差,链路中断发生的概率很高。因此,如何在源节点与目的节点之间选择一条最稳定的路由,提高数据传输的可靠性,降低数据传输的延时,成为研究车载Ad Hoc网络的热点。针对车载Ad hoc网络节点的特点,提出了一种基于方向优先链路预测的路由算法。该算法的特点是充分利用了车载定位系统和辅助射频系统所提供的位置、方向和移动速度信息,设计了一种适合于车载Ad Hoc网络的路由转发机制,首先根据车辆的位置信息,把车辆分为普通节点和岔路口节点:对于普通节点,结合车辆的方向信息对车辆进行分组,使同一组车辆的移动方向基本相同,进而采取链路生存时间预测和路由跳数相结合的路由转发策略,在同一组车辆间,选择一条最优的路由;对于岔路口节点,采取最大余弦值策略,选择与目的方向一致的节点转发数据。最后论文通过NS3软件验证了结论,并进一步结合农机物联网项目探讨了应用方法,取得了较好效果。结果表明,与GPSR-AGF和A-STAR路由协议相比,本文提出的路由算法有效的提高了数据包的吞吐量,降低了端到端的数据传输延时和路由控制开销。
[Abstract]:Vehicle Ad Hoc network is a specific application of mobile Ad Hoc network. However, because of the fast moving speed and changeable moving direction of the vehicle nodes, the mobile path is restricted by the road condition, which causes the network topology to change dramatically, the stability of the routing link is poor, and the probability of the link interruption is very high. Therefore, how to choose the most stable route between the source node and the destination node, to improve the reliability of data transmission and reduce the delay of data transmission, has become a hot spot in vehicle Ad Hoc network. According to the characteristics of vehicular Ad hoc network nodes, a routing algorithm based on direction-first link prediction is proposed. The characteristic of this algorithm is that it makes full use of the position, direction and moving speed information provided by vehicle positioning system and auxiliary radio frequency system, and designs a routing and forwarding mechanism suitable for vehicle Ad Hoc network. The vehicle is divided into ordinary nodes and bifurcation nodes: for ordinary nodes, the vehicles are grouped with the direction information of the vehicle, so that the movement direction of the same group of vehicles is basically the same. Furthermore, a route forwarding strategy combining link lifetime prediction and routing hops is adopted to select an optimal route among the same group of vehicles, and the maximum cosine value strategy is adopted for the intersection nodes. Select the node to forward the data in the same direction as the destination. Finally, the conclusion is verified by NS3 software, and the application method is further discussed with the project of Internet of things of agricultural machinery, and good results are obtained. The results show that compared with GPSR-AGF and A-STAR routing protocols, the proposed routing algorithm can effectively improve the throughput of data packets, reduce the end-to-end data transmission delay and routing control overhead.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.5;U495

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