【作者】 倪金金；

【导师】 李德敏；

【作者基本信息】 东华大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 移动Ad hoc网络(MANET)是一种无需任何提前构建的基础设施就能进行组网的网络，是由一组带有无线收发装置的移动终端组成的一个临时的多跳自治系统。网络中的节点既是移动终端，又具有路由器功能。MANET的这些特点使它更加适合用于军事领域和应急救灾通信。但又由于它的网络拓扑结构动态变化，带宽和能量受限这样的不利因素，使得MANET的应用仍然面临很大的挑战。本文首先介绍MANET的路由协议，指出了现有MANET协议存在的不足，分析了MANET体系结构、关键技术、设计要求以及国内外研究现状。根据几种不同的协议分类方法，对一些典型MANET路由协议的进行了分析，指出了现有协议存在的问题。为了解决现有MANET路由协议中存在的问题，在介绍主动网络的原理、特点和体系结构的基础上，深入分析了主动网络和MANET相结合的可行性和有效性。在前人工作的基础上，将主动网络的思想运用到MANET的路由协议中，提出了基于主动网络的MANET路由策略。根据用户传输数据量和对路由可靠性的不同要求，结合主动网络思想，给出更为合理的路由选择方式，以提高MANET路由的性能。考虑到MANET所面临的安全问题，以及现有安全手段所存在的不足，本文还提出了将主动网络思想运用到解决MANET的路由信任问题中，提出了一种基于相邻节点信任度的MANET主动路由，用以提高MANET的路由安全性。本文的最后部分是将前面提出的策略在网络仿真软件NS2中进行仿真。通过对仿真实验结果的分析，可以看出，结合主动网络思想后的MANET路由和信任度路由在某些网络性能上得到了提高，并指出了本文工作中仍然存在的不足和有待解决的问题。更多还原

【Abstract】 Mobile Ad hoc Network (MANET) is a network that can establish a network without any prior base stations. It is a multi-hop, temporary and autonomy system, which consists of a set of mobile terminals with receiver and transmitter. All the mobile nodes in MANET are both a terminal and a router. Since these characters, MANET is suitable for military affairs and emergency. But, because of the change of network topology and the limitation of bandwidth and energy, there is a lot of challenge for the wider application of MANET.This paper focuses on MANET routing protocols and indicates the shortage of current MAENT routing protocols. We introduce the framework, key technology and present research firstly. We analyses the requirement of MANET routing design and introduce some methods of MANET routing protocols’ classification. By introducing some typical routing protocols, the problems in current routing protocols are advanced.In order to solve the problems in current routing protocols, we use the idea of applying active network technology to MANET routing. Based on the idea, we introduce active network’s principle, character and structure. Then we analyses the feasibility and validity of combining active network with MANET. Based on predecessor’s work, we present a MANET routing strategy by combining with active network. According to sender’s data quantity or different requirement to route reliability, combining with active network, a more reasonable routing method is presented, which can enhance the performance of MANET routing.In addition, this paper also tries to apply active network to MANET routing reliability. We introduce the security problems MANET meets with, and introduce some security solutions used in MANET and their shortage. We present an active MANET routing based on neighbor nodes’ credit degree in order to improve MANET routing reliability.The last part in this paper is simulation. We make some simulation of the routing methods we presented in this paper. By comparing of simulation results, the improvement of network performance by applying active network technology to MANET routing is showed directly. And we also indicate the shortage of our work in this paper and some problemneed to be solved in the future.更多还原