A mobile communication system has a cell structure constituted by integrating macro cells and micro cells, and at least one mobile station. The cell structure is made to cover a service area by a plurality of the micro cells each having a predetermined size and to cover the same service area by the single...http://www.google.com.au/patents/US5548806?utm_source=gb-gplus-sharePatent US5548806 - Mobile communication system having a cell structure constituted by integrating macro cells and micro cells
