Patent ID: 6470188
Filing Date: 2002-10-22
Classification: H04B,H04W

Abstract:
A handover method for a mobile communication system, the mobile communication system comprising a first base station, a second base station, a diversity handover trunk, a control means that controls the diversity handover trunk, and a plurality of mobile stations, the method comprising the steps of:communicating, by the diversity handover trunk, with the mobile station through a first transmission route which connects the diversity handover trunk with the mobile station by way of the first base station with a first delay time intervened in communication, the first delay time depending on a type of service; receiving, by the mobile station, a signal through a second transmission route which connects the diversity handover trunk with the mobile station by way of the second base station with a second delay time intervened in communication and longer than the first delay time, the second delay time being determined by the type of service; providing, by the mobile station, a handover trigger signal involving the second base station to the control means by way of the first base station based on declining of communication link quality of a mobile station stationed in a handover target area or on a prescribed handover threshold; changing the delay time in the first transmission route into the second delay time; transmitting, by the diversity handover trunk, a signal directed to the mobile station through both of the first and second transmission routes; and receiving, by the mobile station, the signals provided through the first and second transmission routes for combining the signals or choosing either of the signals.