Design And Simulation Of Ad Hoc Network Protocols

An ad hoc network is a collection of wireless mobile hosts forming a temporary network without the aid of any centralized administration or standard support services. In such an environment, it may be necessary for one mobile host to enlist the aid of others in forwarding a packet to its destination, due to the limited propagation range of each mobile host's wireless transmission.Some previous attempts have been made to use conventional routing protocol for routing in ad hoc networks, treating each mobile host as a router. And these attempts only consider routing protocol by itself, not taking account of packets transmission, nor making these attempts under the network's restriction. So these theoretical attempts can't be applied to practical ad hoc network.The dissertation proposes a new on-demand routing protocol for this wireless, mobile, multihop network. It also presents relative packet frame and packet transmission protocol. The two protocols even have some other functions, such as acknowledgement policy. The design of this dissertation is under physical restriction, which is introduced in Section 3.1.The dissertation is organized as follows:Chapter 1 presents every attribute of ad hoc network, and set forth its application.Chapter 2 expatiates on the network protocol of ad hoc, including protocols in existence and their comparative performanceChapter 3 expounds the design of ad hoc network protocol, involving the protocol's content, relative packet frame, packet transmission protocol, IP address assignment protocol and some policies.Chapter 4 introduces a simulation tool - OPNET, and builds a model of the design referred in Chapter 3. It also illustrates the results of simulation.