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

Figure 2

MU outage probability caused by Approx and FTPA versus the density of FBSs development when the QoS type of each MU is voice (𝜓¹_𝑚=5.31dB).

(a) 𝛿_𝑝=20 dB

(b) 𝛿_𝑝=15 dB

(c) 𝛿_𝑝=10 dB