The Impact of Reactive Routing Protocols for Transferring Multimedia Data over MANET

Abstract

A Mobile Ad-hoc Network (MANET) is a collection of wireless nodes that can be
 dynamically set up anytime and anywhere without requiring existing infrastructure. In the network
 each node works as a router to discover and maintain the routes form the source to destination.
 Nowadays, demanding for transferring multimedia traffic over MANET is increased while the
 different factors that effect in MANET to maintain real-time communication in the presence of a
 dynamic network topology. One of the factors that affect the ability of MANET to transfer
 multimedia traffic from source to destination is routing protocol. The main goal of this paper is the
 study, selection and evaluation the performance of two reactive routing protocols: Adhoc On
 Demand Distance Vector (ADOV) and Dynamic Source Routing (DSR) in a high mobility case under
 low, medium, and high density scenarios in order to transfer video conferencing application by using
 an OPNET simulator. While AODV and DSR share similar On Demand behavior, the protocols
 internal mechanism leads to significant differences in performance. The metrics used for
 performance analysis are average end-to-end delay, network load and throughput. As a result of our
 studies that the performance varies widely across different network sizes and results from once
 scenario cannot be applied to those from the other scenario. In all three scenarios, we concluded
 that performance of the DSR protocol is not good as throughput is very low and the routing load is
 very high when compared to AODV protocols. AODV exhibits a better performance than DSR
 protocols in terms of end-to-end delay. This study proves that AODV performs well in terms of end-
 to-end delay, network load, and throughput with increasing number of mobile nodes.

Investigating the Impact of Mobility Models on MANET Routing Protocols

“…This protocol is suitable for multicast and unicast routing between participated mobile nodes in the network. AODV has the capability to maintain only the routes that are actively used in a communication [12]. AODV has a crucial role to reduce the number of needed broadcasts messages through the network.…”

“…This message continuously propagates across the network until it accesses the destination node. Each RREQ consists of the fields such as Source Address, Request ID, Source Sequence No, Destination Address, and Destination Sequence No, Hop Count [12]. If any of the neighbor node have a route to reach the destination node, it informs the source node by sending a unicast Route Reply (RREP) message.…”

“…Each node in the network has the capability to select a set of its neighbor nodes as an MPR. Furthermore, the MPR selectors set are used by each node to count nodes that have chosen it as an MPR node [12].…”