JiST – Java in Simulation Time - Evernote
JiST – Java in Simulation Time - Evernote
JiST – Java in Simulation Time - Evernote
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exist<strong>in</strong>g wireless simulators<br />
ns2 is the gold standard<br />
• written <strong>in</strong> C++ with Tcl b<strong>in</strong>d<strong>in</strong>gs<br />
• created for TCP simulation,<br />
modified for wireless networks<br />
• processor and memory <strong>in</strong>tensive<br />
• sequential; max. ~500 nodes<br />
• recently “fixed” for ~5000 nodes<br />
OpNet <strong>–</strong> popular commercial option<br />
• good model<strong>in</strong>g capabilities<br />
• poor scalability<br />
PDNS <strong>–</strong> parallel distributed ns2<br />
• event loop uses RTI-KIT<br />
• uses fast <strong>in</strong>ter-connect to<br />
distribute memory requirements<br />
• shown ~100,000 nodes<br />
<strong>JiST</strong> <strong>–</strong> <strong>Java</strong> <strong>in</strong> <strong>Simulation</strong> <strong>Time</strong><br />
rule of thumb: extra 10x <strong>in</strong> scale,<br />
us<strong>in</strong>g at least 10x hardware and cost<br />
sequential<br />
GloMoSim<br />
• implemented <strong>in</strong> Parsec, a<br />
custom C-like language<br />
• implements “node aggregation,”<br />
to conserve memory<br />
• shown ~10,000 nodes on NUMA<br />
mach<strong>in</strong>e (SPARC 1000, est. $300k)<br />
custom-made simulators<br />
• fast, specialized computation<br />
• lack sophisticated execution and<br />
also credibility<br />
parallel<br />
SWAN<br />
• parallelized and distributed us<strong>in</strong>g<br />
the DaSSF framework<br />
• similar capabilities to GloMoSim<br />
• shown ~100,000 nodes<br />
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