On Mar 6, 2008, at 4:55 PM, Yi-Tao Wang wrote:
As far as I know, there's no radio interference modeling. So it
doesn't take care of either problem. It's strange because I thought it
took care of this in TOSSIM for tinyos 1.x, but I guess they must have
changed the implementation.
David
On Thu, Mar 6, 2008 at 12:50 PM, Pengjun Pan <[EMAIL PROTECTED]> wrote:
Hi.
Here is a short question. Does TOSSIM have any sort of machanism
to deal
with hidden and exposed node problems? Any reply or clue is
appreciated.
Thanks in advance.
Er -- it takes care of both cases. The major difference between
TOSSIM in 1.x and 2.x is 1.x uses a bit-error model with binary
interference and CSMA, while 2.x uses an SNR-based packet error model
with SINR-based interference and CSMA. So you get the hidden terminal
problem, the exposed terminal problem, strongest-first versus
stronger-second, etc.
Phil
Phil
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