[Tinyos-help] TOS 2.x simulator

[Frederic Beaulieu]

Phil is right, I mean slow variation in time (ten of millisecond) of the RSS between two nodes. Is it feasible to implement something like this?
What about simulate network formation? Is it also something feasible?

Thanks a lot guys,
.:Fred

-----Original Message-----
From: tinyos-help-bounces at millennium.berkeley.edu [mailto:tinyos-help-bounces at millennium.berkeley.edu] On Behalf Of Philip Levis
Sent: Friday, May 16, 2008 2:04 PM
To: Paul Stickney
Cc: tinyos-help at millennium.berkeley.edu
Subject: Re: [Tinyos-help] TOS 2.x simulator


On May 16, 2008, at 10:55 AM, Paul Stickney wrote:

> I do not understand what you mean by slow-fading.
>
> But...
> The UCS tool can be used to create test networks. It lets you specify
> many variables in a configuration file which is then generated into a
> gain/noise data which can be fed into the TOSSIM T2 radio model (this
> may cover what you want).  However, Chad Metcalf, in his TOSSIM-Live
> paper, shows that UCS isn't necessarily realistic and shows how he was
> able to get a much more accurate simulation environment based off of a
> real-world scenario. See
> toilers.mines.edu/pub/Toilers/ChadMetcalf/cmetcalf-thesis.pdf.

Probably the biggest flaw in the current TOSSIM radio model is that
the RSSI is completely constant. The RF community has a bunch of terms
they use to describe RF behavior which sound mostly incomprehensible
to someone who doesn't know them (fast fading, slow fading, shadowing,
etc.). In this case, I think he's talking about the fact that signal
strength varies over time in slow fading models.

Phil
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