An MBS-Assisted Femtocell Transmit Power Control Scheme with Mobile User QoS Guarantee in 2-Tier Heterogeneous Femtocell Networks

Figure 4

MU outage probability caused by Approx and FTPA versus the density of FBSs development when the QoS type of each MU is data (𝜓⁵_𝑚=2.94dB).

(a) 𝛿_𝑝=20 dB

(b) 𝛿_𝑝=15 dB

(c) 𝛿_𝑝=10 dB