[Tinyos-devel] CTP and LPL on tmote

[Omprakash Gnawali]

On Sat, Dec 6, 2008 at 12:03 AM, Andreas Köpke <koepke at tkn.tu-berlin.de> wrote:
> Hi guys, looks like we isolated the problem.
>
> Using two nodes about 3m apart, one sender, one receiver, one message every
> 1.5s on average we get the following delivery ratios:
>
> DC        mean    90% confidence interval
> 5%        0.097   0.086   0.11
> 10%      0.21     0.126   0.295
> 20%      0.26     0.18   0.34
> 50%      0.55     0.46   0.63
> 100%    0.995   0.98    1.00
>
> Once we switch on LPL, the packets are hardly detected by the receiver.

I don't remember things being this bad.

Is your guess that if we used test programs with something like
periodic packet transmission (lets say every 1s) and a base station,
we will have similar problem? I would have a hard time believing that
is the case but I haven't done this test in a while.

- om_p