I finally solved the problem by myself.  Hope this is helpful for
other people have the similar problem.  The reason is that the radio
model is based on location information. The plugins need to be loaded
in proper sequence.   So I have to load the LocationPlugin first, and
then deploy the motes to designated locations, and finlly add the
RadioModelPlugin.  Now the routing tables are correct.


---------- Forwarded message ----------
From: Haodong Wang <[EMAIL PROTECTED]>
Date: Mon, 7 Feb 2005 15:57:38 -0500
Subject: Problem with Radio Model
To: [email protected]


Hi,

I am working on a geographic routing simulation which does greedy
forwarding based on motes' fake location in TinyViz.  I am really
confused about the radio model in TOSSIM.  I have following two
questions and look forward to your help.

1. I run my simulation by following steps:
    -- Invoke simDrive, with my executable, RadioModelPlugin,
LocationPlugin, ...  The radio model I am using is disc10 with scaling
3.
    -- In the Tyhon console, run my script to deploy (move) the motes
to designated locations;
    -- By clicking on a mote, I can see the green radio link
connecting to its neighbors.
    -- Then, I start the simulation, to my surprise, motes do not
receive routing msg from their neighbors, but always receives msg from
other motes beyond the radio links. Why?

2.  The TOSSIM manual says increasing the radio model scaling factor
will decrease the connectivity of radio range.   With disc10, I
changed the factor from 1 to 10, 100, ..., but nothing happened.  Did
I do anything wrong?

Any comments will be highly appreicated, thanks!

-HD
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