Bugzilla – Bug 1440
aodv throughput decrease badly from 20Mpbs to zero
Last modified: 2013-04-26 14:52:10 EDT
Created attachment 1404 [details]
I use the testing code "examples/routing/manet-routing-compare.cc" in ns-3-de v and ns-3.12 to test aodv routing performance. In the simulation, the physic uses 802.11 g ERP-OFDM, set up 10 sinks, 5 Mbps for each on/off Application, Packet size is 5000 Bytes, and the simulation lasts 200 seconds, 0~50 seconds is going to setup the network topology, 51~200 seconds doing the simulation.
When network scale is 10 nodes, the throughput is a normal value from 51s~200s, but with 50 nodes, the performance decreases badly that the throughput decreased from 20 Mbps to 0, the throughput is close to 0 from 178s~200s and a flood of RREQ and RREP happened around 178 second region.
Created attachment 1405 [details]
Michael, I ran your test program (after changing nWifis to 50) against the latest ns-3-dev, using the default random number seed and run number values, and did not see the performance drop that you reported. See the output that it generated (new attachment).
Can you see whether you also obtain this result when testing against ns-3-dev? I did not test against ns-3.12, because that version of aodv did have some bugs (since fixed) that might explain what you observed.
Created attachment 1410 [details]
output of testcase against ns-3-dev, nwifis=50