Figure 1
From: Robust power allocation in two-tier heterogeneous networks
A two-tier heterogeneous wireless network. Consider a two-tier HetNet where a macrocell and femtocells coexisted, and the urban-deployment modeling described[25] is investigated. There exist three femtocell blocks in one macrocell, each of which consists of 40 apartments as illustrated in the top right of this figure. FBS is deployed in each apartment with a certain probability which represents the degree of density. Besides, channel relationship is described in the bottom right of Figure1.