[net2-wg] 3-node test at different rates

[Omprakash Gnawali]

I haven't been able to use the testbed to do large scale test because
there seems to be some problems with the testbed at the moment.

I testbed collection with 3 Tmotes on my desk using different rates. I
am having issues with the serial toolset so I am not using
Dissemination to change the value - I just recompile with different
rates. I changed the rates by changing the argument to
Timer.startPeriodic() in TestNetworkC.nc to the following eight rates:

Timer.startPeriodic(60)
Timer.startPeriodic(50)
Timer.startPeriodic(40)
Timer.startPeriodic(30)
Timer.startPeriodic(25)
Timer.startPeriodic(20)
Timer.startPeriodic(15)
Timer.startPeriodic(10)

For each rate, I log the packets for 100 seconds. Then I plot the
number of packets received from each node every second and also total
packets for each second:

http://enl.usc.edu/~om_p/net2/

Two observations:

- The rates seem more or less fair even at high rates.

- The aggregate rate seems to be peaking at about 80-90 pkts. Is this
expected behavior?

- om_p