Analysis of femtocell coverage fraction and isolated probability using stochastic geometry

The deployment of femtocells can effectively improve cellular network capacity without any significant increase in the network management costs. Femtocell base stations are usually installed by users which poses unique challenges for future mobile communication standards. The randomness of the locations of femtocells brings us a lot of difficulties to analyze and compare. In this paper, femtocell coverage fraction and femtocell base station isolated probability are explored with the aid of stochastic geometry. Firstly, we assume that femto base stations are installed randomly following homogeneous Poisson point process and discuss issues about femtocell coverage fraction. It is demonstrated that the coverage fraction closely relates with femtocell coverage radius. We find that in order to effectively cover macro area, the femtocell coverage radius of at least 20 meters should be guaranteed. Corresponding femtocell isolated probability is also explored which is a vital index in realistic issues such as handover. Then, we add restriction on the minimum distance between each femtocell base station and compare the performance of cases with and without restrictions. This paper provides a new prospective on femtocell coverage fraction and isolated probability and the results can be used for femtocell deployment.