车辆网络的高效数据传输与信息查询方法研究

发布时间：2018-02-17 06:03

本文关键词： 车辆自组织网络邻居节点感知警告消息散播路由信息查询　出处：《上海交通大学》2014年博士论文　论文类型：学位论文

【摘要】：车辆自组织网络是计算机网络领域中一个崭新的研究方向，也是近年来的研究热点之一。本文以上海市4000多辆出租车和2000多辆公交车的真实行驶数据为基础，对车辆网络的四个关键问题进行了研究，包括邻居节点感知、警告消息散播、路由方法，以及信息查询。本文研究的科学问题，具有积极的现实意义和潜在的应用价值，可以为智能交通提供服务。首先，对于邻居节点感知问题，本文提出车辆网络中一种有效的邻居节点感知方法ENS。在ENS中，，每辆车都能够以较小的感知延迟来感知其邻居的到来和离开。此外，对于警告消息散播问题，利用车辆邻居信息，本文提出了车辆网络中一种有效的警告消息散播方法WMD，WMD可以让消息以较快的速率在车辆网络中散播。利用真实车辆行驶数据,我们进行基于真实车辆行驶数据的仿真实验。仿真实验的结果证实，这些方法都取得了较好的效果，优于其它方法。其次，对于路由问题，本文提出车辆网络中一种有效的基于复制的路由方法ERR。ERR包括三个设计目标：第一，在消息生存期内将绝大多数消息成功发送；第二，实现较低的延迟；第三，尽可能产生较低的发送代价。为了以低代价实现高成功率，ERR以分布的方式对一条消息的拷贝数量采取自适应策略。仿真实验的结果证实，相比较其它路由方法，ERR以较低的发送代价实现了较高的发送成功率。最后，对于信息查询问题，本文提出车辆网络中一种有效的信息查询方法MIQ，它可以让用户以较低的延迟和较高的成功率收到信息回复。在MIQ中，基于车辆未来行驶轨迹，我们设计了查询路由和回复路由，以及数据包转发策略。仿真实验的结果证实，MIQ取得了较好的效果，优于其它方法。
[Abstract]:The vehicle ad hoc network is a new research direction in the field of computer network, and it is also one of the research hotspots in recent years. This paper is based on the real driving data of more than 4000 taxis and 2000 buses in Shanghai. This paper studies four key problems of vehicle network, including neighbor node perception, warning message dissemination, routing method, and information query. The scientific problems studied in this paper have positive practical significance and potential application value. It can provide services for its. First of all, for neighbor node awareness, an effective neighbor node awareness method, ENS, is proposed in this paper. In ENS, each vehicle can perceive the arrival and departure of its neighbors with a small perceptual delay. For the problem of warning message dissemination, using vehicle neighbor information, this paper proposes an effective warning message dissemination method in vehicle networks, WMD-WMD, which allows messages to be distributed in vehicle networks at a faster rate. Simulation experiments based on real vehicle driving data show that these methods have better results than other methods. Secondly, for routing problem, this paper proposes an effective replication-based routing method (ERR.ERR) in vehicle networks, which includes three design objectives: first, the majority of messages are sent successfully in the lifetime of messages; second, the implementation of low latency; In order to achieve a high success rate at a low cost, err adopts an adaptive strategy for the number of copies of a message in a distributed manner. The simulation results show that, Compared with other routing methods, Err achieves higher success rate at lower transmission cost. Finally, for the information query problem, this paper proposes an effective information query method in vehicle network, MIQ, which allows users to receive information reply with lower delay and higher success rate. In MIQ, based on the vehicle future trajectory, We design query routing, reply routing and packet forwarding strategy, and the simulation results show that MIQ has a good effect and is superior to other methods.
【学位授予单位】：上海交通大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：U463.6;U495;TN919.3

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