From: Capacity analysis of LTE-Advanced HetNets with reduced power subframes and range expansion
BS type
PPP
Intensity
Tx. power
Distance of UE to
nearest BS
USF-MBSs
Φ usf
β λ
P
r
CSF-MBSs
Φ csf
(1-β)λ
α P
PBSs
Φ ′
λ ′
P ′
r ′