Performance Research And Simulation Of Routing Protocols Of Ad Hoc Network

Ad hoc network is a wireless mobile network which works, in the unstructured and self-organization environment. It can be applied to the military occasion or particular situation. For example, to initiate and promote rapid battlefield forces, help the army deploying or going forward in the battlefield, and the rescue after earthquakes or floods. In the absence of network infrastructure, Ad hoc networks can be rapidly deployed, each node in the network can move as both a server and a router. The Ad hoc, network can organize fast, flexibly, and can still work if there is no wire circuitry, it will be used broadly.This thesis describes the structure of ad hoc network first, focuses on the study of route technology which is the key technology in ad hoc especially. DSDV bases on route table, uses sequence number to avoid the appearance of router circle. ZRP is a hierarchical routing protocol, which can control the router spending, cut the delay and improve the efficiency, while setting the best radius. DSR bases on source route, uses cache of route with little spending in network, and old route exists. AODV, as the synthesis of DSR and DSDV, depends on middle nodes to establish and maintenance route table, uses sequence number to avoid the appearance of router circle, supports the function of group broadcast and QoS, uses IP address, depends on the network link and doesn't support signal orientation channel. TORA uses directed acyclic graph and link reversal, adaptive to the extremely active mobile network. In the end, the paper provides the simulate results of protocols mentioned above and makes a particular analysis.At last, concerning energy limited in ad hoc network, it is more and more important to select efficient energy conservation. We introduce five standards to evaluate energy-aware routing protocol, and present a protocol aimed at maximizing the life -span of a network without any central information about the topology or traffic demands. We simulate this protocol in NS2, and offerreferrence to study ad hoc network.This thesis has six chapters as below:Chapter 1 introduces research background and meaning of this thesis, also introduces characteristic and research hotspot of Ad hoc network.Chapter 2 introduces basic knowledge of Ad hoc network, Including of developing history, definition and system structure of Ad hoc network, and wide application in reality.Chapter 3 is the emphasis of this thesis. We study popular route protocols in Ad hoc network: Including of DSDV (Destination-sequenced Distance Vector), AODV (Ad-hoc On-Demand Distance Vector Routing Protocol), DSR (Dynamic Source Routing Protocol), TORA (Temporary Ordered Routing Algorithm) and ZRP (zone Routing Protocol), etc. We analyze characteristic and performance of the protocols described above.In chapter 4, we use NS2 to simulate the protocols introduced in chapter 3, and choose four network performance parameters (delay, package delivery ratio, route expenses, network system lifetime) to analyze the results.Chapter 5, considering the energy of node in Ad hoc network is limited, in order to lengthen the network system lifetime, we should choose route which can utilize the whole network energy. This chapter introduces five standards to evaluate energy-aware routing protocol, and proposes an Energy-Based Routing Protocol (EBRP). EBRP protocol tries its best to select this route where every node has higher level energy, in order to length the network system lifetime. And we contrast EBRP and AODV, the results verify that we design exactly.Chapter 6 summarizes this paper, at the same time, suggestions for research are given.