IJCSNS International Journal of Computer Science and Network Security, VOL.9 No.4, April 2009
10
Manuscript received April 5, 2009
Manuscript revised April 20, 2009
Effect of Mobility and Traffic flow on DSR protocol in a pre-
defined Mobile Ad Hoc Network
A. Valarmathi† and RM. Chandrasekaran††
†Department of Computer Applications, Anna University Tiruchirappalli, Tiruchirappalli -620 024, India
††Department of Computer Science and Engineering, Anna University Tiruchirappalli, Tiruchirappalli-620 024, India
Summary
The increased used of bandwidth restricted multimedia
applications over Mobile Ad hoc Networks (MANETs) create
new challenges to routing protocols in terms of Quality of
Service (QoS) requirements. To meet these requirements, the
existing routing protocols should provide data transfer with
minimal delay, packet loss and jitter. In the present paper, a pre-
defined topology was created using NS-2 with strategically
placed nodes in order to test the performance of Dynamic Source
Routing (DSR) protocol. The network was simulated with pre-
defined mobility and workload and evaluated in terms of
different performance metrics such as throughput, jitter, number
of dropped packets, end-to-end delay and routing efficiency. The
mobility of the nodes found to be more influencing than the
workload. In a particular parameter combination of 20 seconds
pause time, 5 CBR traffic flow and 200 PPS data rate, the
network exhibited highest routing efficiency of 93.3%. At
extended simulation time, congestion adversely affects the
performance of the network.
Key words: MANET; DSR, NS-2, mobility, workload,
multimedia
1. Introduction
Mobile Ad hoc Networks (MANETs) are self-organizing
and self-configuring networks which work without any
infrastructure or central control. All nodes within the
network either act as routers or hosts which provide
cooperative multi-hop communication. The nodes are also
able to move, exit or can be connected arbitrarily. This
leads to continuous