HI friends,
I have a question about the behavior of Physical Carrier sensing in NS2.
Can any one help me to clarify it?
According to my understanding, in the ns-2 code, physical carrier
sensing is handled by a timer. When there is a packet with a received power
higher than CST the timer is set to the end of that packet's transmission.
Before the timer expires, the station assumes the channel is busy and can
not start a transmission.
My question is that:
If there comes a new packet with a received power higher than CST
before the timer expires, will ns-2 extend the timer of channel busy to the
end of the second packet's transmission? or It just assumes the channel is
idle when the previous timer expires?
Many Thanks,
Hui Ma
University of Washington
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