Ad Hoc Network Routing Protocols And Simulation,

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. 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, results of protocols mentioned above and makes a particular analysis.At last, concerning DSR AODV DSDV are single-path routing protocols, they are of higher delay ,the higher frequency of flood , the lower packets delivery ratio than Multi-paths routing protocol .for this reason, we bring forward the conception of the Multi-path routing, building the mathematical model for Multi-path routing and analyzing it.then we introduce a Multi-paths routing protocol-AOMDV, which developes from AODV. Using AOMDV protocol as the routing protocol in Adhoc.We can reduce thenetwork delay, enhance the packets delivery ratio and reduce the frequency of flood. We simulate AOMDV in NS2, and offer referrence to study Ad Hoc network.