08-16-2017, 09:59 PM
Abstract
There are already many are trying to tell us, as
use NS-2 easily, and I would not like to see hard as its official
Manual says. However, how easy it is to use NS-2 to do
performance evaluation is still lacking. As a rule, mark
that goes from one file NS-2 modeling time is
more than 600 MB, this analysis is certainly a huge file
Would be a great time. Still, there is a lot of score
Techniques, but use is very time consuming and may not
Exactly what we want the easy option. This article is
Let people who use NS-2 can easily do the job network
The message model. So, make it easier and faster to adopt
NS-2 more practical. In addition, this document apply this
performance evaluation method for comparing two
on-demand routing protocols DEMAND and source of the MAT, and
Shows the DSR more suitable for the sensor
applications
1. Introduction
The Ns-2 Simulator developed in object-oriented framework
VINT project at the University of California at
The Berkeley project is funded by DARPA.
cooperation with Xerox Palo Alto Research Center
(PARC) and Lawrence Berkeley National Laboratory
(LBNL). Ns-2 is widely used in network
Research community. This provides significant support to the
modeling TCP, routing, multicast protocols over
Wired and wireless (local and satellite) networks, etc.
Simulation driven and runs in
without a real time fashion. It consists of a C ++ methods
and uses Tcl and Tcl as a wrapper object interface that allows
input file (the script modelling) to describe the model
to simulate. Users can define an arbitrary network
topology consists of nodes, routers, links, and
Shared Media rich set of Protocol can be
attached to nodes, usually as agents. This is already
become the de facto standard in network
study.
Although NS rather use as soon as you get to know
Simulator, it's hard for the first time a user
Because there is little useful guidance. even
There are many, though the documentation by:
developers detailed explanations about the Simulator,
It is written with the depth of the NS power user.
There are many user-friendly tutorials on
How to use NS-2 easily. They give a new
Some of the main idea of the user, how it works, as the Simulator
to install networks simulation where to look Next
information about network components in the Simulator
codes, how to create new network components and
on. They mainly focus on simple examples and
Explanation brief. Although the use of
Possible network or modeling Simulator installations may
Will not be covered in the projects, projects also help
new user to get a quick work. However, with good
material tutorials available today, There is still no
Documents to facilitate the analysis of the post-modeling.
With NS-2 is a course project, whose main purpose is to
to assess the effectiveness of the existing network or
network performance with new design
component. Thus, in order to make progress on this
The problem in this article so that people who use NS-2 CAN
easy to make the network analysis, simulation
Further to make more practical NS-2 on
scalable simulation.
The rest of this article, section 2, we will discuss how
the wireless simulation in NS-2; section 3 Will
tell about the format of a trace file of NS-2, and then
Section 4 will do the analysis on two sample routing
protocols, DEMAND and DSR, and show how our
Evaluation of effectiveness can work on analysis mode
of them.