Methods for handoff in a wireless communication network including a local area network connected to a plurality of base stations, each of which has a geographic area, defined as a cell, within which mobile stations can communicate with a base station, with each such base station being capable of performing...http://www.google.de/patents/US5448569?utm_source=gb-gplus-sharePatent US5448569 - Handoff monitoring in cellular communication networks using slow frequency hopping
