A Self-Learning MAC Protocol for Energy Harvesting and Spectrum Access in Cognitive Radio Sensor Networks

Table 1

Main simulation parameters.

Parameter	Value
Cognitive sensor nodes	900
Spectrum bands	5
Simulated time epochs	200,000
PU active probability
Harvested energy per slot	μW × τ
Transmission energy per packet	2.25 mW × τ
Cycle length	256
Harvesting parameter	0.6
Minimum probability	0.01
Transmit score parameter	0.5
Transmit score parameter	0.2
Aging factor	0.8
Battery maximum stored energy per sensor node
Initial battery energy	0 mW × τ (empty)
Mean packet arrival rate (packet per epoch)	to
, for modified-CSMA