ORBIT-USER: Location of pillars

[Haris Kremo]

Chris,

To the best of my knowledge the pillars should not be the problem.

The set of measurements with the network analyzer into which we have
high confidence indicates a lot of reflections in the room and we plan
further measurements to determine what causes these. Alas, these
measurements do not include possibility of pillars being the obstacle.

The set of power-delay profile measurements with these cases included
have some issue with absolute values - it turns out it is very hard to
calibrate the instrumentation. But relatively, they show that pillars
do not affect signal strength.

Another experience with pillars I have is in a large room adjacent to
the grid. The same pillar appears to be practically transparent when
tested using a transmitter adjacent to it and 802.11b Yellow Jacket.

The pillars are actually mostly plaster wall, hiding a pretty narrow steel beam.

We plan to continue these tests and post results as soon as the new
set of low-noise cables we ordered arrives. Unfortunately, this means
occasional blackouts of the whole testbed, including the sandboxes :-)

Regards,

H.


On 8/28/06, chris at orderonenetworks.com <chris at orderonenetworks.com> wrote:
> Hello All,
>
> I'm wondering if part of my problem of missing packets are the pillars in
> the room. It seems unlikely, but it should be easy enough to test.
>
> I've looked at the one picture of the lab that I can find, but I have no
> idea which corner the (0,0) node is, and counting ever smaller nodes in
> the picture makes my eyes go funny - so deciding where the pillars fit in
> the grid is difficult.
>
> Is there a drawing of the grid somewhere with the pillars positioned in it?
>
> Thanks,
> Chris
>
>