[Tinyos-devel] Re: from longer CTP/LQI experiments

[Omprakash Gnawali]

On Dec 23, 2007 8:10 PM, Philip Levis <pal at cs.stanford.edu> wrote:
>
> On Dec 23, 2007, at 7:54 PM, Omprakash Gnawali wrote:
> >>
> >>
> >
> > Here are the graphs that describe the outcome of the experiments on
> > Mirage. Rodrigo did experiments with a5,a6,a7 (two runs), and a9:
> > http://enl.usc.edu/~om_p/net2/ctp4bitle/mirage-12212007/figures.html
> >
> > The usual detailed plots are accessible from the links at the bottom
> > of the page. The subdirectories for time series plots are named
> > as usual as well.
> >
> > It seems like alpha does not change the metrics on Mirage: note the
> > narrow range on the y-axis for most of the metrics graphs. My
> > conclusion
> > is they work equally well and for lack of a trend, if we try to
> > draw more
> > conclusion, it might be reading too much into the data.
>
> Make sense. When the network is stable, alpha doesn't make a big
> difference, as the past is like the present. Om, it might be
> interesting to figure out exactly what's going on in Tutornet that's
> so challenging about it.
>
> Phil
>

Based on the results thus far, high alpha (9) is good because it works on
two testbeds. That is the alpha used in 4bitle in the CVS.

We might want to do some tests on motelab too when someone gets
some time. Maybe just two or three alphas.

Can we say something from the 1Khz RSSI samples from Tutornet
other than higher noise than on Mirage?

- om_p