A microcell is a cell in a mobile phone network served by a low power cellular base station (tower), covering a limited area such as a mall, a hotel, or a transportation hub.  A microcell is usually larger than a picocell, though the distinction is not always clear.  Microcell’s use power control to limit the radius of its coverage area; typically the range of a microcell is less than a mile wide.  A micro cellular network is a radio network comprising of microcells and is generally smaller than a macrocell.