摘要
由于IPv6丰富的地址资源、内在的安全性和移动性,IPv6必将取代IPv4成为下一代网络互联协议。而Ad Hoc网络以其组网灵活性,分布式控制的优势在很多环境下被应用。
将移动IPv6以及Ad Hoc网络结合在一起突现了两方面的优势:一方面利用移动IPv6的移动管理技术实现移动切换;另一方面又可以利用Ad Hoc网络的组网灵活性和更大的通信范围,快速建立一个全IP网络。因此Ad Hoc网络和IPv6的结合将在将来被越来越多的应用,而基于Ad Hoc网络的移动IPv6切换的研究也将越来越重要。但是,移动IPv6是针对有AP的单跳网络,而Ad Hoc网络不仅没有AP而且多跳是其最重要的特点。因此,将移动IPv6应用于Ad Hoc网络需要在一些方面进行改进。本文的主要内容就是建立基于移动IPv6的Ad Hoc网络,通过仿真以及在Linux下的实现进行分析、验证和改进。
本文首先介绍Ad Hoc网络的背景知识,理论分析移动IPv6各阶段的切换过程,针对乒乓运动提出基于可信区域的移动IPv6切换。
其次,提出基于移动IPv6的分级Ad Hoc网络并作出改进方案,并利用OPNET仿真工具对快速地址配置的方案、基于MPR机制下的路由器通告转发的优化方案、基于可信区域的移动IPv6切换以及基于移动IPv6的分级Ad Hoc网络进行仿真并分析移动IPv6各切换阶段时延。
最后,介绍Linux实现平台和移动IPv6的实现程序,通过修改iwlist工具源代码产生新的链路层扫描和自动切换程序,最后搭建Ad Hoc网络模型进行室内和室外测试实验并分析切换延迟。
As the IPv6’s rich address resource, internal security and mobility, IPv6 will necessarily replace IPv4 as the next generation internet protocol. The Ad Hoc Networks have been applied in many environments for the advantage of networking flexibility and distributed control.
The combination of mobile IPv6 and Ad Hoc Networks has two advantages: on one hand, using the mobile management technology of mobile IPv6 to achieve mobile switching; on the other hand, using the networking flexibility and a greater communication range of Ad Hoc Networks to build an all IP networks quickly. Therefore, the combination of mobile IPv6 and Ad Hoc networks will be applied more and more in the future, and the study of mobile IPv6 based on Ad Hoc networks will also become increasingly important. However, the mobile IPv6 are targeted at single-hop networks having AP, Ad Hoc networks have no AP and mutli-hop is the most import trait. Therefore, for the adopting of mobile IPv6, the Ad Hoc networks needs to be improved in some aspect. The main content of this paper is to establish IPv6-based mobile Ad Hoc network, and through simulation and implement under Linux to analysis and improve.
This paper firstly introduced the background knowledge of Ad Hoc network; theoretically analyzed the switching process of mobile IPv6 in any period; and proposed mobile IPv6 switching based on credible-zone for the ping-pong movement.
Secondly, the paper proposed the Ad Hoc network of basing on mobile IPv6 and made improving scheme; then adopted OPNET to simulate the scheme of fast-address configuration、the optimization scheme of router to forward notice based on MRP mechanism、the mobile IPv6 switching based on credible-zone and the hierarchical Ad Hoc network based on mobile IPv6 as well as analyzed the delay of any switching period;
Finally, the paper introduced the Linux implement platform and the implement program of mobile IPv6; and through modified the source code of iwlist tool to generate new link layer scan and auto-switching program; at last built Ad Hoc network model to test and analyze switching delay indoor and outdoor.
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