【作者】 郑石；

【导师】 张钦宇；

【作者基本信息】 哈尔滨工业大学 ， 通信与信息系统， 2006， 硕士

【摘要】 Ad hoc网络指的是由若干带有无线收发信机的节点构成的一个无中心的、多跳的、自组织的对等式通信网络,它可以不依赖预先存在的网络基础设施而快速展开,自适应组网,各节点可以在不进行通知的情况下自由进入网络和离开网络且不会导致整个网络陷入瘫痪。移动Ad hoc网络的研究重点之一是路由协议。Ad hoc网络的各个节点在充当终端角色发送和接收信息的同时,还作为路由中继节点转发信息。由于移动Ad hoc网络特点,路由的选择会直接影响网络吞吐量,端到端时延,终端节点的能量消耗等参数。多数终端节点都采用有限电源模式,因此剩余能量就作为节点最宝贵的资源,一旦资源耗尽,终端节点就无法工作,也无法作为中继节点继续工作,进而导致整个网络无法正常运行。然而,在一些节点能量耗尽的时候,其它节点还有过多剩余能量,这就造成了Ad hoc网络的能耗不公平性,还有些节点担负着比其它节点更为重要的作用,一旦能量耗尽会对整个网络造成巨大损失。因此,就需要在基于最短路径路由的常规路由协议基础上,更多的考虑网络的能量损耗公平性,即负载均衡性能。本文研究的目的就是在现有协议基础上兼顾网络公平性,延长网络生存时间,提高网络吞吐量等性能。本文采用OPNET网络仿真软件10.5版本,对实际业务进行建模,仿真分析了现有路由协议AODV、DSR等的相关性能,以及修改后的DSR路由协议性能,并对他们做出比较分析。仿真结果证明,修改后的路由协议确实在一定环境下,能够大大提高系统网络公平性,延长网络生存时间,并且提高了网络吞吐量,性能指标达到要求。本文中仿真得到的结论反映了新路由协议的优越性,为负载均衡路由协议的进一步发展提供了参考。更多还原

【Abstract】 A mobile Ad hoc network (MANET) is a multi-hop, decentralized, self-configuring, peer-to-peer communication network that consists of several nodes with radio transceiver. It can be rapidly deployed and networking adaptively without relying on the pre-existing network infrastructure. The nodes in a MANET can dynamically join and leave the network without warning, and possibly without disruption to other nodes’communication.One of the important research areas of MANET is routing protocol. While every node have a role of terminal to receive and send messages, it is also a relaying node to retransmit messages. Because of the characteristic of Ad hoc network, the routing choosing will infect the network throughput, end to end delay, terminal nodes energy consuming straightly. Most terminal nodes have a model of finity energy, so the rest energy is the invaluable resource of nodes. Once resource exhausts, the terminal nodes can’t work normally and be the retransmission node. At the same time, other nodes have overmuch rest energy, which makes inequity of energy consuming in Ad hoc network. Because many nodes play a more important action than other nodes, it will make large loss once energy exhausting.So it needs on the base of mini-path routing protocol, consider equity of energy consuming much. The objective of the article research is on the base of existing protocol, considering equity of network, making the network life time longer, improving the throughput.This thesis adopts OPNET networking emluation software, builds the service model, emluates and analyse the performance of AODV、DSR and more, and makes comparison to them. The results of emluation indicate the modified routing protocol can improve the networking equity in some entironment, making the network life time longer, improving the throughput, make index get to the needed.The conclusions in this thesis drawn from simulations indicate the superiority of new routing protocol, which offers the referrence for the更多还原