Welcome to the OMNeT++ Community!

OMNeT++ is an extensible, modular, component-based C++ simulation library and framework, primarily for building network simulators. "Network" is meant in a broader sense that includes wired and wireless communication networks, on-chip networks, queueing networks, and so on. Domain-specific functionality such as support for sensor networks, wireless ad-hoc networks, Internet protocols, performance modeling, photonic networks, etc., is provided by model frameworks, developed as independent projects. OMNeT++ offers an Eclipse-based IDE, a graphical runtime environment, and a host of other tools. There are extensions for real-time simulation, network emulation, alternative programming languages (Java, C#), database integration, SystemC integration, and several other functions.

OMNeT++ is free for academic and non-profit use, and it is a widely used platform in the global scientific community. Commercial users must obtain a license from More...

Featured Projects:

   INET Framework (Internet and LAN protocols)   INETMANET (mobile and ad-hoc networks)   Oversim (peer-to-peer networks)   Veins - Vehicles in Network Simulation    ReaSE (realistic Internet simulations)   MiXiM (detailed wireless simulations)   Castalia (wireless sensor and body area networks)   More...

New users: Watch the screencast for an introduction into the Simulation IDE, or see in the publications list what OMNeT++ has been used for. Check out some tutorials, browse the documentation, watch introductory videos, and explore the featured network simulation projects (click the logos above)!

OMNeT++ 4.2b2 released
Thursday, 05 May 2011 00:00
Dear users, we've just released the second beta of OMNeT++ 4.2. Please read the ChangeLog carefully to see what has changed since the 4.1 version. Download and try it now.
HNOCS - Network on Chip Simulation Framework
Wednesday, 09 March 2011 10:43
NoC simulation is a key for NoC architectures research resulting from the huge incurred cost of VLSI prototypes production using modern manufacturing processes. Although several NoC simulators exist, they are either proprietary or built on non standard infrastructure. HNOCS is an open-source implementation of a NoC simulation framework using OMNeT++. The HNOCS framework utilizes the OMNeT++ module interface feature to support runtime selection of simulation modules from a library of parametrized components. For example by setting the opCalcType parameter from "XY" to "XY/YX" the simulation change to use a different output port selection algorithm. The models provided support heterogeneous NoC configuration in terms of link capacity and number of VCs. HNOCS modules available today implement wormhole switching, with round-robin or winner-takes-all arbitration. Current version of HNOCS contains different router implementations: synchronous, asynchronous and a full virtual output queuing (VOQ) with FIFO for each (input VC, output VC and output port) tuple.

Go to the homepage at: or v
isit the model page.

OMNeT++ 4.2b1 released
Wednesday, 23 February 2011 00:00
Dear users, we've just released the first beta of OMNeT++ 4.2. Please read the ChangeLog carefully to see what has changed since the 4.1 version. Download and try it now.
OMNeT++ Workshop -- Call for Participation
Friday, 11 February 2011 10:37

The program for the 4th International OMNeT++ Workshop is now available online.

Early registration deadline: February 21, 2011
Workshop: March 21, 2011 (Barcelona, Spain)

The continuing goal of this workshop is to bring together OMNeT++ developers and their tools, applications and ideas. It provides a forum for presentations of recent developments and novel ideas in the broad area of network simulation, with focus on OMNeT++ and on the important topics of integrating simulation models, coupling different simulation tools and providing more accurate and more efficient modeling approaches...

Castalia 3.1 Released
Thursday, 03 February 2011 09:18
Castalia developers have released version 3.1 of Castalia, a simulator for Wireless Sensor Networks (WSN), Body Area Networks (BAN) and generally networks of low-power embedded devices. The main new feature is a tool to automatically create graphs based on output from the CastaliaResults script. It also enhances the functionality of TunableMAC and provides several bug fixes. Castalia is developed in the Networked Systems theme at NICTA (Australia) since 2007.
INET-HNRL: Optical, Wireless and Hybrid Networking Extensions for INET
Friday, 17 December 2010 15:24

From Kyeong Soo Kim: This is to announce the INET-HNRL, a new fork of INET Framework developed for hybrid networking research. INET-HNRL provides new models in both the optical and the wireless networking areas and their hybrid. Currently, the following models and research frameworks have been implemented:

  • Models for the hybrid TDM/WDM-PON under the SUCCESS-HPON architecture;
  • Comparative analysis framework based on the equivalent circuit rate (ECR) for the study of next-generation optical access (NGOA) architectures;
  • Wi-Fi localization (currently integrating them into INET, which were formerly implemented based on INETMANET)

The project homepage is at, where you can find a brief overview of each model/framework together with all the relevant publications. The github project URL is

mCoA++: Multiple Care of Address Registration for xMIPv6
Thursday, 16 December 2010 15:58
This post is to announce mCoA++, an extension of the xMIPv6 Mobile IPv6 modeling framework. mCoA++ enables the registration of multiple care of addresses for Mobile IPv6 nodes. The code has been developed by Bruno Sousa and Marco Silva from Laboratory of Communications and Telematics (LCT) of University of Coimbra, in Portugal. Project home page:
Workshop Deadline Extended!
Monday, 15 November 2010 11:39
The deadline for the next OMNeT++ Workshop has been extended -- the new deadline is November 29th, 2010. Please find the updated Call for Papers here.
VoIPTool 2.0 released
Sunday, 07 November 2010 00:00
This is to announce VoIPTool 2.0, a realistic VoIP traffic generation and evaluation tool for the INET Framework and OMNeT++ 4.1. The package is an evolution of VoIPTool 1.x from Mathias Böhge and Martin Renwanz (TKN, TU Berlin): the code has been moved to github (as project inet-framework/voiptool), ported to OMNeT++ 4.x, and its external interface (parameters, etc.) and implementation has been revised. The package provides a VoIP source and a VoIP sink module as UDP apps. The source app transmits the contents of an audio file (mp3, wav, etc.) to the sink app as VoIP traffic, which can save it to an output audio file for later evaluation. Current maintainers are Zoltán Böjthe and Andras Varga. Download.
Announcement: OverSim-20101103 release
Thursday, 04 November 2010 00:00

Ingmar Baumgart has announced OverSim release 20101103. It brings support for the ReaSE Internet topology generator, experimental support for TCP and IPv6 in SimpleUnderlay and InetUnderlay, the N-Tree overlay protocol, recursive routing for Kademlia, and many other changes and improvements (details below). You can download OverSim-20101103 and the patched INET framework INET-OverSim-20101019 from the download area of

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