【作者】 何彬；

【导师】 乐正友；

【作者基本信息】 清华大学 ， 信息与通信工程， 2004， 硕士

【摘要】 移动Ad Hoc网络,又称移动自组网,是近年来兴起的一种特殊的无线移动网络,其主要特点是网络中所有节点的地位平等,无需设置任何的中心控制结点。节点不仅具有普通移动终端所需的功能,而且具有报文转发能力,尽管单个节点的无线通信范围有限,但是借助其他节点的转发,两个无法直接通信的节点之间可以实现数据通信,不需要固定的基站支持,网络拓扑结构可以动态变化,具有其他网络无法比拟的抗毁性。因此,在军事战术通信、应急通信、协同移动通信、无线接入系统和传感器等网络中,Ad hoc网络有着广泛的应用前景。随着Ad Hoc网络的研究工作的发展,以Internet接入为代表的Ad Hoc网络的应用问题越来越被人们所关注。本论文的主要工作包括如下几个部分:一、深入研究了Ad hoc网的多种路由技术,通过实际搭建测试床验证了多种路由算法的性能,建设了基于FreeBSD以及Linux的Ad Hoc网络测试床,在测试床上进行了路由算法的有效性验证以及相关数据测量分析,使之能够提供稳定、可靠的通信,并进行多次实地测试演示。二、对于移动Ad Hoc网络固有的路由安全问题,针对网络中节点的不规范路由行为,提出了一种基于多径源路由的安全机制,以保证网络的稳定性和可靠性,并讨论了一些参数的选取。三、以当前Internet的广泛应用以及Mobile IP技术的飞速发展为导向,提出了将Ad Hoc网络升级到IPv6并与Mobile IPv6融合接入IPv6的Internet的方案,并对相关的环节进行了测试床实现以及仿真分析。测试结果和仿真结果均表明,所提出的方案在理论研究和具体应用的结合下,可以切实有效地解决Ad Hoc在IPv6下通过Mobile IP接入Internet的问题。更多还原

【Abstract】 Mobile Ad hoc Networks (MANETs) has been a field of interest in the past years due to its unique character of self-creating, self-organizing, self-administrating. Many routing protocols have been presented and attracted a lot of research interest. A nodes can communicate with other nodes that are out of the direct range with the help of other nodes. Comparing with other mobile communication networks, ad hoc networks don’t need any fixed base station and their topology changes quickly. As the ad-hoc wireless networks get more attention, there are increasing demands to provide Internet connectivity to the ad-hoc networks.This thesis includes three major contributions. First we implemented and developed a DSR testbed of Mobile Ad hoc Networks and analyzed the performance of routing protocols. Some analysis is also presented in this part to explain these data results.Secondly, on basis of Multipath Source Routing, we designed a scheme to prevent damages caused by node misbehaviors and discussed the parameters in this strategy.Thirdly we suggested a strategy to combine MANETs with Mobile IPv6 protocols with two steps. 1.Upgrade of addresses of nodes and routing algorithm to IPv6 to achieve the Internet connectivity. 2.Modify original Mobile IPv6 specifications to guarantee the compatibility of the integration. This strategy is well proved to be efficient by both Testbed and simulation.更多还原