Study of Performance of Routing Protocols for Mobile Adhoc Networking in NS-2

Abstract

Ad hoc networking allows portable devices to establish communication independent of a central infrastructure. However, the fact that there is no central Infrastructure and that the devices can move randomly gives rise to various kind of problems, such as routing and security. In this thesis the problem of routing is considered. This thesis addresses issues pertaining to two different routing protocols Destination Sequenced Distance vector (DSDV) and Dynamic Source Routing (DSR) protocols, which are used for efficient routing under different scenarios in Mobile Ad-hoc Network (MANET), which plays a critical role in places where wired network are neither available nor economical to deploy. My objective was to implement the two routing protocols using Network Simulators and run it for different number of nodes. Then I compared the two routing protocols for different network parameters and studied the efficient protocol under a particular scenario on the basis of two metrics.
(1) Packet delivery ratio
(2) Routing load
DSDV is a Proactive gateway discovery algorithm where the gateway periodically broadcasts a gateway advertisement message which is transmitted after expiration of the gateways timer.
DSR is a Reactive gateway discovery algorithm where a mobile device of MANET connects by gateway only when it is needed.