Patent ID: 6532221
Filing Date: 2003-03-11
Classification: H04W

Abstract:
A handoff method of a mobile communications system, in which a cell is defined by a sector, comprising:a first step of receiving a pilot detection message from a mobile station and comparing an input pilot signal strength of a base station which is in service with a threshold value for pilot-checking of neighboring base stations; a second step of determining that the neighboring base stations are required to check their pilot signal strength if the input pilot signal strength of the base station which is in service is smaller than the threshold value for checking pilot of neighboring base stations, and comparing the pilot signal strength of the base station which is in service with pilot signal strengths of the neighboring base stations; and a third step of distinguishing a pilot signal strength of a predetermined level among the pilot signal strengths of the neighboring base stations if the pilot signal strength of the base station which is in service is smaller than the pilot signal strengths of the neighboring base stations, and transmitting a message to requesting handoff to a corresponding base station which has the distinguished pilot signal strength.