For accomplishing an interference-free handover in a cellular communication system which has at least one base station per cell, which base station is controlled by a base station controller which controls one or more base stations, and which base station controller, with the base station or stations...http://www.google.fr/patents/US6011971?utm_source=gb-gplus-shareBrevet US6011971 - Handover method and cellular communications system
Handover method and cellular communications system