ABSTRACT
A mobile ad hoc network (MANET) represents a system of wireless mobile nodes that can freely and dynamically self-organize into arbitrary and temporary
network topologies, allowing people and devices to seamlessly communicate without any preexisting communication architecture. An ad hoc routing protocol is a convention or standard that controls how nodes come to agree on which way to route packets between computing devices in a MANET. Nodes do not have a priori knowledge of the topology of the network around them; they have to discover it. The basic idea is that a new node announces its presence and listens to broadcast announcements from its neighbors. The node learns about new near nodes and ways to reach them, and announces that it can also reach those nodes. As time goes on, each node knows about all the other nodes and one or more ways of how to reach them. We show from our simulation results that mobility models have a considerable effect on the performance of these routing protocols. Ad hoc networks are formed spontaneously and deployed during an emergency. The mobile nodes in the networks will freely move and communicate with each other. Due to high mobility and dynamic changing topology, we need to use a suitable mobility model for a particular network scenario. The change in mobility model affects the performance of routing protocols.
