Stochastic Geometry Based Handover Modelling in Two-tier Femtocell Networks

Background: In order to handle user demand the 4G mobile operators should install additional smaller cells to their traditional cellular structure for the sake of larger capacity, fewer call drops and for better network coverage. The result is a heterogeneous (two-tier) cellular network which contains smaller cells (like femtocells) under the macrocells. A femtocell usually provides coverage to a smaller area (e.g. flat or house) and transports the data to the femtocell gateway via wired technologies. Due to this wired background the handover between macro and femtocells might increases the number call drops. Keywords: Macrocell, femtocell, handover modelling, stochastic geometry, coverage probability, handover probability.