NS-2 Training
4/15/2013
Introduction

NS-2: Network Simulator Generation 2

Latest Release: 2.35 / Nov. 4, 2011


http://sourceforge.net/projects/nsnam/files/allinone/ns-allinone-2.35/
Other Simulators

OPNET

QualNet

ns-3
Installation (1/2)

Cygwin


Linux-like environment for Windows
Download



http://140.116.164.80/~smallko/ns2/cygwin.rar
http://www.cygwin.com/
NS-2



The latest version: ns-2.35
ns-allinone-2.28/2.29
Download


http://sourceforge.net/projects/nsnam/files/
http://140.116.164.80/~smallko/ns2/ns-allinone-2.28.rar
Installation (2/2)

Nam: Network Animator (nam-1.15 released Nov 4 2011)



animation tool for viewing network simulation traces and real
world packet traces
http://sourceforge.net/projects/nsnam/files/nam-1/
http://www.isi.edu/nsnam/nam/index.html
TCL Codes

TCL (Tool Command Language)


pronounced as "tickle"
Basic terms

Create a new simulator

Definitions for nam

Open a trace file

Network behaviors

• Initialize the packet format
• Create a scheduler
• Select the default address format
• /ns-2.xx/tcl/lib/ns-lib.tcl
set ns [new Simulator]
set nf [open out.nam w]
$ns namtrace-all $nf
set nd [open out.tr w]
$ns trace-all $nd
Nodes, links, queue size, node position, traffic types, simulation times,
etc.
Output data


NAM
Trace
• appeared as "------" since no flag is set
• Explicit Congestion Notification
Analysis

AWK



Alfred Aho, Peter Weinberger, and Brian Kernighan
programming language that is designed for processing textbased data
pronounced as the same as the name of the bird, “auk”
Run AWK file

Commands
awk -f file1.awk file2.tr
awk -f file1.awk file2.tr > out.txt

file1.awk


file2.tr


a command file
a primary input file
out.txt

an output file
AWK

Form
/pattern/ { action }



Pattern is typically an expression
Action is a series of commands
In NS-2 Simulator
BEGIN { action }
END { action }
AWK

You can measure


Delay, Jitter, Packet loss, and Throughput
Example
Rests of this project

WiMAX module

http://140.116.164.80/~smallko/ns2/ns-allinone-2.29_wimax.rar

長庚大學

Install cygwin first and then download this file. Decompress it. After that,
run “./configure; make clean; make depend; make”

ns-allinone-2.29_wimax\ns-2.29\mac\802_16\traffic
Rests of this project

MPEG








modify the file packet.h in the common folder
modify the file agent.h in the common folder
modify the file agent.cc in the common folder
create a folder under ns-2.27 and put added files in it
modify the file tcl/lib/ns-default.tcl
modify the Makefile
recomplie NS2
RTP




add a folder into the ns directory
modify ns-default.tcl
modify the Makefile
recomplie NS2
Rests of this project

Correctly Decodable Frames in a GOP

A. Ziviani, B. E. Wolnger, J. F. Rezende, O. C. M. B. Duarte, and S.
Fdida, “Joint Adoption of QoS Schemes for MPEG Streams,”
Multimedia Tools and Applications, vol. 26 no. 1, pp. 59-80, May
2005.

計算機網路實驗—使用NS2模擬多媒體通訊與無線網路，
柯志亨團隊
Resources

Gunplot


Plot the analyzed results of awk
Web site

NS2 使用說明手冊


MPEG


http://hpds.ee.ncku.edu.tw/~smallko/ns2/ns2.htm
http://hpds.ee.ncku.edu.tw/~smallko/ns2/Evalvid_in_NS2.htm
RTP



http://140.116..80/~yufrank/YCY/myevalvid_rtp.htm
http://hpds.ee.ncku.edu.tw/~smallko/ns2/measure.htm
http://searun.iteye.com/blog/362415
Resources

Books


計算機網路實驗—以NS2模擬工具實作，柯志亨
計算機網路實驗—使用NS2模擬多媒體通訊與無線網路，
柯志亨團隊