面向QoS优化和应对DoS攻击的DSR协议研究

发布时间：2018-03-05 03:36

  本文选题：Ad　切入点：Hoc网络　出处：《中南大学》2014年硕士论文　论文类型：学位论文

【摘要】：施,网络中的节点既是主机、又是路由器,它非常适用于一些特殊的场合,相关技术是当前无线网络技术研究的热点方向。随着人们对多媒体服务要求的提高,对Ad Hoc网络中提供QoS保障服务的要求也越来越高。然而,由于Ad Hoc网络与传统的蜂窝通信网络、WLAN等具有根本性的不同,所以这为研究Ad Hoc网络的相关技术带来了挑战。本文研究的对象是Ad Hoc网络的DSR路由协议,对如何提升它的QoS保障进行了深入的研究。 本文对于DSR路由协议,在参阅了大量文献的研究成果基础上,针对DSR协议的缺点做了一些优化改进,目标在于提升路由协议的QoS性能。文中首先阐述了DSR协议的运作过程,并指出了在路由回复阶段中容易发生的路由响应冲突问题,针对此缺陷提出了一个DSR-BCA路由算法,算法修改了节点的路由请求报文、路由回复报文、路由出错报文,并完善了协议在网络中的运作过程。另一个本文分析了Ad Hoc网络在受到DoS攻击时的缺陷,在DSR-BCA协议的基础上增加了一个应对DoS攻击的机制并命名为DSR-BCA-RD协议。先让参与到路由链路中的节点都执行路由参与验证算法,当网络数据传输的丢包率超过预设阈值时,用隔离算法找出被DoS攻击的节点并隔离它,使网络中有效节点的比例最大化。 最后,利用NS2仿真平台进行了实验验证与对比分析。结果表明,在原DSR协议基础上的优化起到了较好的效果,经过优化处理的算法在各性能指标上得到了不同程度的提高,对于提升DSR协议的QoS性能起到了一定的作用。图19幅,表8个,参考文献77篇。
[Abstract]:The node in the network is not only the host but also the router. It is very suitable for some special occasions. The related technology is the hot research direction of the wireless network technology at present. The demand for providing QoS security services in Ad Hoc networks is becoming higher and higher. However, due to the fundamental differences between Ad Hoc networks and traditional cellular communication networks, Therefore, this brings challenges to the research of Ad Hoc network technologies. The object of this paper is the DSR routing protocol of Ad Hoc network, and how to improve its QoS guarantee is deeply studied. In this paper, on the basis of consulting a lot of research results of DSR routing protocol, we make some optimization improvements to the shortcomings of DSR protocol, the goal of which is to improve the QoS performance of the routing protocol. In this paper, the operation process of DSR protocol is first described. This paper also points out the problem of routing response conflict in the phase of routing response, and proposes a DSR-BCA routing algorithm to solve this problem. The algorithm modifies the routing request message, the route reply message and the routing error message of the node. It also improves the operation process of the protocol in the network. Another paper analyzes the defects of Ad Hoc network when it is attacked by DoS. Based on the DSR-BCA protocol, a mechanism to deal with the DoS attack is added and named DSR-BCA-RD protocol. Firstly, the nodes participating in the routing link are executed routing participation verification algorithm. When the packet loss rate of the network data transmission exceeds the preset threshold, The isolation algorithm is used to find the node attacked by DoS and isolate it so as to maximize the proportion of effective nodes in the network. Finally, the NS2 simulation platform is used for experimental verification and comparative analysis. The results show that the optimization based on the original DSR protocol has a better effect, and the optimized algorithm has been improved in different degree on each performance index. It plays an important role in improving the QoS performance of DSR protocol.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.08

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