Figure 4From: Optimal power control and coverage management in two-tier femtocell networksExperimental results for four active clusters. (a) A two-tier system with 27 femtocells assembling 4 clusters is considered. (b) System performance results on overall aggregated utility (i.e., throughput) increment, (c) macrocell’s aggregated utility (i.e., throughput) increment, and (d) overall power consumption decrement under PCC compared to PC are illustrated.Back to article page