NS-2 Training

1. NS-2 Training 4/14/2014

2. 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

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

4. 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

5. 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. • 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

6. Output data • appeared as "------" since no flag is set • Explicit Congestion Notification • NAM • Trace

7. 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”

8. 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

9. AWK • Form • Pattern is typically an expression • Action is a series of commands • In NS-2 Simulator /pattern/ { action } BEGIN { action } END { action }

10. AWK • You can measure • Delay, Jitter, Packet loss, and Throughput • Example

11. 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

12. 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

13. 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

14. 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

15. 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

16. EMAIL • joseph2486@atm.ee.nsysu.edu.tw