Figure 2
From: Robust power allocation in two-tier heterogeneous networks
Outage probability vs the density of femtocells. This figure depicts the variation of MUEs’ outage probability under different robust parameters with the increase of FBSs, d r ranging from 0 to 1. As the number of FBSs grows, aggregate interference causes more MUEs being blocked. Meanwhile, we can see that considering channel uncertainty does bring performance gain in terms of outage probability.