[ns] Introduce delay in passing packet to Link Layer

[samira.niafar@gmail.com]

hi

Although there is a field delay_ in the parent class MAC which simulates the
MAC computational overhead, it is not used for any simulation in ll or
mac-802.11. So if a MAC layer overhead needs to be simulated, the delay_ field
needs to be inserted at 2 places:

{ simulating the send down overhead in transmit(): replacing

downtarget_->recv(p->copy(),this) to

s.schedule( sometimer ,p->copy(),delay_): the sometimer is a Handler or
TimerHandler

whose expiring would call the downtarget_->recv();

{ simulating the send up overhead in recvDATA(): replacing

uptarget_->recv(p,(Handler*)0) to
s.schedule( sometimer, p, delay_);

above changes will inserted at mac_802.11.
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Samira Niafar
Iran University of Science and Technology



-- 
Sincerely
Samira Niafar
Iran University of Science and Technology