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 Nodes, links, queue size, node position, traffic types,

simulation times, etc.

set ns [new Simulator]

set nf [open out.nam w]$ns namtrace-all $nfset nd [open out.tr w]$ns trace-all $nd

• Initialize the packet format• Create a scheduler• Select the default address format• /ns-2.xx/tcl/lib/ns-lib.tcl

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 text-based data pronounced as the same as the name of the bird,

“auk”

Run AWK file Commands

file1.awk a command file

file2.tr a primary input file

out.txt an output file

awk -f file1.awk file2.tr

awk -f file1.awk file2.tr > out.txt

AWK Form

Pattern is typically an expression Action is a series of commands

In NS-2 Simulator

/pattern/ { action }

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 http://hpds.ee.ncku.edu.tw/~smallko/ns2/ns2.htm

MPEG 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