文档介绍：华中科技大学
硕士学位论文
基于Ad Hoc网络的可信路由协议研究与设计
姓名:李兆婧
申请学位级别:硕士
专业:通信与信息系统
指导教师:李波;喻莉
20090525
华中科技大学硕士学位论文
摘要
Ad hoc 网络是一组无线移动节点组成的多跳临时自治系统,它不需要中心管理
和固定网络基础设施。随着现代通信对网络移动性和组网灵活性需求的增加,Ad Hoc
网络的应用范围大大扩展。基于可信保障的网络业务急需实际应用到 Ad Hoc 网络
中,而由于 Ad Hoc 网络的特性,节点间默认为是相互信任的,从而易受到各种攻击。
这使得可信成为阻碍 Ad hoc 网络发展的瓶颈,其中,尤以路由协议的可信更为重要,
因此解决路由可信问题在 Ad Hoc 网络通信中变得十分迫切。
本文在研究了Ad hoc网络及其路由协议的背景基础上,提出了一种基于贝叶斯
理论的可信模型及框架。其中给出了可信的定义,并在贝叶斯框架下建立可信机制,
给出了信任值和置信值的定义及计算方法,并考虑历史可信度的权重,提出了可信
度的计算方法,并给出了链路可信度处理方法以得到路由可信度,为选择可信路由
做准备。并将提出的可信模型及框架与Ad hoc路由协议结合起来,选取典型的路由
协议AODV进行研究,在此基础上提出可信路由T-AODV,并在T-AODV中考虑安全
可信的同时考虑了其性能。从路由发现、路由维护各过程中制定T-AODV机制,包括
基于小世界模型的RREQ消息传播的控制、基于可信的RREQ的处理方法、多条可信
路由的建立与检测、节点路由表中备用路由的存储与选择、路由维护过程中路由失
效机制和hello机制。最后,分析了可信T-AODV路由协议,并对仿真结果从可信性和
路由性能两方面进行分析。通过分析,可以得到T-AODV是一种可信路由协议,且在
一定程度上提高了网络性能。

关键词:无线自组织网络,可信模型,可信路由,无线自组织网按需距离矢量路由
协议(AODV),路由性能
I
华中科技大学硕士学位论文
Abstract
Ad work is a temporary multi-hop autonomous posed of wireless
mobile nodes without centralized management and work infrastructure support.
With increasing demand working mobility and flexibility imposed by modern
communication technology, the application of Ad work has stretched to a wide
range of areas. work service has urgent need to be deployed in Ad Hoc
environment. However the characteristic that nodes are considered be trusted with each
other in Ad work makes it easily being under various attacks. The problem of
trustworthiness has e the bottleneck which hinders the development of Ad Hoc
networks. Of all the trustworthy issues under Ad Hoc, the trustworthiness of routing
protocols is one of the most important issues. So, it is pressing to solve the problem of
routing trustworthiness under Ad munication.
After the research into background of Ad works and routing protocols, this
thesis proposes a trust model and framework that based on Bayesian theory. First, it gives
the definition of trust and builds the trustworthy mechanism under Bayesia