Figure 2From: Open, closed, and shared access femtocells in the downlinkFemtocell coverage variation for the FAP-MBS distance D ; in outer region ( D > D th ), femtocell coverage is larger than indoor area ( R f > R i ), while R f < R i in inner region. The femtocell coverage is classified into four geometrical zones F a , F b , F i , and F o .Back to article page