I. Introduction
Femtocells and small cells in general are a cornerstone of next generation networks. From its concept, future networks are designed with the consideration that the extreme demand in data rates can only be met by utilizing multiple base stations of small radius, scattered along the umbrella of macrocell infrastructure[1]. The usage of millimetre wave spectrum with the significant penetration losses that characterizes it, makes the limited radius of small cells even more useful. Added with their flexibility, capability for mobility, their user-friendly deployment and their cost effective features, small cells in the form of micro-, pico-and femtocells are an integral part of what will comprise the next generation networks.