calculating power consumption of a link

[SheriefHeshmat]

dear prof

from the paper "Coupling Routing Algorithm and Data Encoding for Low
Power Networks on Chip"
i read how the power of a link can be calculated depending on these four transitions.
(Type I transition occurs when one of the lines switches
while the other stays unchanged. In a Type II transition
one line switches from low to high and the other from
high to low. A Type III transition occurs when both
lines switch simultaneously. Finally, in a Type IV
transition both lines do not switch. )
my question is where to detect these transitions in noxim so as to get benefit for these calculations for power.
thanks a lot