= The Overlay Framework =

!OverSim is an open-source overlay and peer-to-peer network simulation framework for the [http://www.omnetpp.org/ OMNeT++/OMNEST] simulation environment. The  simulator contains several models for structured (e.g. Chord, Kademlia, Pastry) and unstructured (e.g. GIA) P2P systems and overlay protocols.

!OverSim is developed at the [http://www.tm.uka.de/itm/index.php?lang=en Institute of Telematics (research group Prof. Zitterbart)], Universität Karlsruhe (TH) within the scope of the [http://www.scalenet.de ScaleNet] project funded by the [http://www.bmbf.de/en/index.php German Federal Ministry of Education and Research]. The simulator is actively developed and open to contributions. If you have any questions regarding !OverSim, please send an email to the MailingList.

'''If you write a paper using !OverSim, please use the following citation: [http://www.tm.uka.de/itm/publications.php?bib=250&lang=en bibtex reference]'''.

= News =

September 9, 2009
  * We successfully presented !OverSim at the [http://www.p2p09.org/ IEEE P2P'09] in Seattle, USA. After giving an [http://www.tm.uka.de/itm/WebMan/view.php?view=publikationen_detail&id=360 invited talk] in the [http://edas.info/W.php?page=133#18619 "Evaluation Tools Session"] we presented !OverSim's features for real network application in the following demo session.  

September 8, 2009
  * Released [OverSimDownload OverSim-20090908].
    * New Python scripts for postprocessing and plotting
    * New application layer multicast protocol NICE
    * GNP/NPS network coordinate system
    * Hotspot roaming model for simplegameclient
    * DHT: support for multiple entries with the same key
    * Underlays: Added support for asymmetric channels
    * Several API and INI FILE CHANGES - check your files!
    * Many other bugfixes and enhancements (take a look at [/chrome/site/doc/ChangeLog doc/ChangeLog])

March 4, 2009
  * The ''GI/ITG Fachgruppe KuVS'' has awarded the !OverSim project with the ''KuVS Communication Software'' prize. The prize is awarded for innovative software for use in communication and distributed systems. 

January 16, 2009
  * !OverSim was successfully deployed in the [http://www.planet-lab.org/ PlanetLab] research network on about 450 nodes to provide the [http://www.p2pns.org/ peer-to-peer name service P2PNS]. The P2PNS name service is used to built a P2P SIP VoIP network without servers. There is a [http://p2pname.org/ P2P SIP demo website] which shows the current overlay status and allows to make P2PSIP test calls.

[OldNews [Old News...]]

{{{
#!html

<table cellspacing='0' cellpadding='24' border='0' width='80%'>
<tr>
<td>	<a href="../chrome/site/pics/ChordIPv4.png" target="blank"><img src='../chrome/site/pics/ChordIPv4_small.png' alt='Chord IPv4' ></a></td>
<td>	<a href="../chrome/site/pics/Chord-Ring.png" target="blank"><img src='../chrome/site/pics/Chord-Ring_small.png' alt='Chord ring'></a></td>
<td>	<a href="../chrome/site/pics/GIA.png" target="blank"><img src='../chrome/site/pics/GIA_small.png' alt='GIA'></a></td>
</tr>
</table>

}}}

== Good Starting Points ==

 * OverSimGuide -- Starting point for the '''!OverSim documentation'''.
 * OverSimFeatures -- Already available and planned !OverSim features.
 * OverSimDownload -- Download !OverSim on this page.
 * MailingList -- Join the mailinglist for user and developer discussions.
 * OverSimPublications -- Publications related to !OverSim
 * OverSimTeam -- The core developers of !OverSim.
 * [http://www.p2pns.org P2PNS/P2PSIP] -- A distributed name service for P2PSIP built with !OverSim

For a complete list of available wiki pages, see TitleIndex.