Patent ID: 6438377
Filing Date: 2002-08-20
Classification: H04W

Abstract:
A handover method comprising:measuring at least one of a level and a quality of an uplink signal of a mobile station at a serving base station, comparing the at least one of the level and the quality of the uplink signal measured at the serving base station with a predetermined triggering value and a predetermined threshold value by a base station controller, said base station controller commanding predetermined neighboring base stations to measure the at least one of the level and the quality of the uplink signal of the mobile station at said neighboring base stations, when the at least one of the level and the quality of the uplink signal has dropped below said predetermined triggering value at said serving base station, the neighboring base stations being determined by the base station controller prior to the quality of the uplink signal dropping below the predetermined triggering value, and said base station controller commanding said mobile station to perform a handover to one of said predetermined neighboring base stations that has measured a most suitable of the at least one of the uplink signal level and the quality, when the at least one of the uplink signal level and the quality has dropped below said predetermined threshold value for handover at the serving base station.