Performance Analysis Of Ad Hoc On-Demand Distance Vector (AODV) Routing Protocol

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Date
2005-12
Authors
Hashim, Fazurulhisyam
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Abstract
The idea of ad hoc network was originally initiated for military purposes, but it was re-emerging as a hot research topic in recent years. Ad hoc networks are gaining increasing popularity in recent years because of their ease of deployment. No wired base station or infrastructure is needed, and ,each mobile host communicates on~ another via packet radios. There are numerous potential applications for such network: conference, military networks" and personal area network, just to name a few. In ad hoc networks, each mobile host participating in the network acts as a router and therefore willing to forward packets for other mobile hosts. Therefore, a routing protocol is needed and it is very important for ad hoc applications. In ad hoc networks, routing protocols are challenged with establishing and maintaining multihop routes in the face of mobility, bandwidth limitation and power constraints. In this dissertation, the Ad hoc On-demand Distance Vector (AODV) routing protocol is studied. The goal is to develop and analyze the AODV protocol on OMNeT ++ simulation framework. The interaction between MAC protocol and AODV protocol is also presented in the thesis. Three types of MAC protocols are included in the model. They are CSMA, FAMA and IEEE 802.11 protocol. The results show that IEEE 802.11 provides the best overall performance among the simulated MAC protocols. Then, three types of local connectivity management schemes were included in the AODV model. The schemes are Hello messages, link layer feedback and combination of Hello and link layer feedback. The results indicate that the combination 'f " of Hello and link layer feedback provides the best performance and more suited for mobile networks because it combines the efficiency of Hello messages and information from link layer (MAC layer) and therefore manage the mobility in a more efficient manner. However it suffered more control message overhead compared to the others schemes. The simulation results also show that AODV protocol performs well at higher mobility rates. The size of the network and the offered traffic load also affects the AODV protocol. A large network with many mobile hosts (more than 100·hosts) and high offered load increase the overhead of AODV protocol quite drastically.
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Ad hoc network was originally initiated , for military purposes
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