ns-3 tutorial

Improving Simulation CredibilityThrough Open Source SimulationsTom HendersonUniversity of WashingtonThe Boeing CompanySimutools ConferenceMarch, 2008 Simutools March 2008 1Talk outline• A decade of ns-2 network simulations• ns challenges and directions– ns-3 project overview– Dealing with simulation credibility issues Simutools March 2008 2What is ns (or ns-2)?• ns is a discrete-event network simulator for Internet systems– protocol design, prototyping, multiple levels of abstraction• ns has a companion network animator called nam– hence, has been called the nsnam project Simutools March 2008 3Some ns-2 history• Dedicated project funding on the simulator itself finished in 2000– Key institutions: USC ISI, Berkeley, LBNL, ICIR, PARC, and others Simutools March 2008 4ns-2 Impactns is a research community resourceSource: Search of ACM Digital Library papers citing simulation, 2001-04• Other statistics:– Over 50% of ACM and IEEE network simulation papers from 2000-2004 cite the usen so-2f • Source: ACM Digital Library and IEEExplore searches– 10 Simutools 2008 papers/posters related to ns-2 Simutools March 2008 5Still in heavy use...• over 8000 downloads/month (ns-2 plus ns-allinone), active mailing listsns-allinone and ns-2 downloads1100010000900080007000600050004000300020001000004-0705-0706-0707-0708-07 09-0710-0711-0712-0701-0802-08Statistics: SourceForge project site (http://sourceforge.net/projects/nsnam/) ...