OMNetOMNet++++

By: Fatemeh SaremiBy: Fatemeh SaremiBy: Fatemeh SaremiBy: Fatemeh Saremi

Modeling and Analysis of Computer Networks CourseModeling and Analysis of Computer Networks Course

Prof. A. MovagharProf. A. Movaghar

Sharif University of TechnologySharif University of Technology

Computer Engineering DepartmentComputer Engineering Department

Spring Spring 20092009

OverviewOverview

� OMNeT++?

� Installation

� Simulation

ModelsModels

� TicToc

Tutorial

� NED, Tkenv,

GNED, Plove,

and Scalars

� AdHocSim 2

What is OMNeT++?What is OMNeT++?

� An object-oriented modular discrete event network

simulator

� traffic modeling of telecommunication networks

� protocol modeling

� modeling queuing networks � modeling queuing networks

� modeling multiprocessors and other distributed hardware

systems

� validating hardware architectures

� evaluating performance aspects of complex software

systems

� ... modeling any other system where the discrete event

approach is suitable. 3

The Simulation System The Simulation System --

ComponentsComponents� Simulation kernel

� Contains the code that manages the simulation

� Library

� Written in C++, compiled and put together to form a library� Written in C++, compiled and put together to form a library

� User interfaces

� Used in simulation execution, to facilitate debugging,

demonstration, or batch execution of simulations. There are

several user interfaces, written in C++, compiled and put

together into libraries

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OMNetOMNet++++

� Portability

� Working on Windows and several Unix platforms

using various C++ compilers

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Linux, Solaris and Linux, Solaris and

other Unixother Unix--like Systemslike Systems

� Download the source tgz archive (omnetpp-

<version>-src.tgz).

� Extract it into your home directory:� Extract it into your home directory:

(tar xvfz omnetpp-2.3-src.tgz )

� You'll find a Readme.Unix file in its doc/

subdirectory -- just follow the instructions

described there.

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WindowsWindows

� You need to have NT4.0, Win2000 or XP.

Win95/98/ME won't work.

� Install OMNeT++ into a directory that doesn't

have space in its name, e.g. don't install in have space in its name, e.g. don't install in

under C:\Program files\ (Otherwise you'll have

problems with the makefiles.)

� Windows/Microsoft Visual C++ 6.0 or 7.0 (.NET)

� Windows/MSVC - building from sources

� Windows/Cygwin

� Windows/MinGW 7

Simulation Models Simulation Models

� An OMNeT++ model consists of the following parts:

� NED language topology description (.ned files) which describe the module structure with parameters, gates etc.

� Message definitions, we can define various message types and add data fields to them.and add data fields to them.

� OMNeT++ will translate message definitions into full-fledged C++ classes.

� Simple modules sources. They are C++ files, with .h/.cc suffix.

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Simulation Simulation Models (Models (Cont.)Cont.)

� INET Framework

� AdHocSim

� Antnet

� Mobility Framework � Mobility Framework

� IPv6Suite

� VideoInterface

� Ethernet

� P2P Swarming Protocol Simulation

� Centralized Network model based on Hiperlan/2 9

Simulation Models (Cont.)Simulation Models (Cont.)

� SimSANs

� Queues

� SCSI Bus

� Personal Communication Services (PCS) � Personal Communication Services (PCS)

� File System Simulation

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TicTocTicToc Tutorial for OMNeT++Tutorial for OMNeT++

� This short tutorial to OMNeT++ guides you

through an example of modeling and

simulation, showing you along the way some

of the commonly used OMNeT++ features.of the commonly used OMNeT++ features.

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Steps for applicationSteps for application

� Create a working directory called tictoc.

� Describe your example network by creating a

topology file (*.ned).

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ModulesModules

� Hierarchically nested modules

� The NED (NEtwork Description) Language

� Facilitates the modular description of a network

� Reuse in another network description

� Message passing

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Modules: ExampleModules: Example

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Steps for application (Cont.)Steps for application (Cont.)

� We now need to implement the functionality of the simple

module (*.cc).

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TxcTxc11.cc (Cont.).cc (Cont.)

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Steps for application (Cont.)Steps for application (Cont.)

� You have to create one omnetpp.ini that tells the simulation

program which network you want to simulate

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Steps for application (Cont.)Steps for application (Cont.)

� We now create the Makefile which will help us to compile and

link our program to create the executable tictoc:

$ opp_makemake

� Compile and link our very first simulation by making

command: command:

$ make

� Once you complete the above steps, you launch the simulation

by issuing this command:

$ ./tictoc

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TicTocTicToc

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TkenvTkenv

� Tkenv is a portable graphical windowing user

interface.

� Tkenv supports interactive execution of the

simulation, tracing and debugging.

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GNEDGNED

� Graphical editor for OMNeT++ models

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PlovePlove

� A handy tool for plotting and analyzing OMNeT++

simulation results

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PlovePlove (Cont.)(Cont.)

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ScalarsScalars

� A handy tool for creating bar charts and x-y plots

from OMNeT++ output scalar files (omnetpp.sca by

default)

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AdHocSimAdHocSim (Assignment)(Assignment)

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LessmannLessmann, J., , J., JanacikJanacik, P., , P., LachevLachev, L., , L., OrfanusOrfanus, D., , D.,

“Comparative Study of Wireless Network Simulators”, “Comparative Study of Wireless Network Simulators”, Seventh International Conference on Networking, Seventh International Conference on Networking, 2008 2008 (IEEE (IEEE

ICN ICN 20082008))

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ReferenceReference

� http://www.omnetpp.org/

� OMNet++ User Manual

� TicToc Tutorial for OMNet++

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Thank you for your attention.Thank you for your attention.

Questions, Comments, …?

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