[ns] how to stop the mac traffic

[Douglas Restrepo]

Hi NS2 people...

I'm working in a simulation con 101 nodes (wireless - 802.15.4) and the simulation is OK, the problem is when i consult the trace file ".tr".

for example, if i suspend the cbr traffic in the simulation, the whole trace contains only MAC traces (s, r and d packets), and each transmission consumes energy. So that...

a node with initial energy   -   100

if i simulated 400 seconds without cbr traffic (nothing), the final energy is 80.    .... and 
if i simulated 400 seconds with 300 seconds of cbr traffic the final energy is 79.

so that, i don't understand how is possible consumes the same energy with and without traffic.


My question is, why the MAC layer is always sending packages, even without having a traffic of the others layer in the network???
this mac transmissions consume a lot of energy.

i appreciate your cooperation.

Thanks for your help.