초록 ▼

Disclosed is a mobile communication system including a network constituted of at least one switching center and a plurality of base stations, and a mobile station which communicates with the base stations simultaneously. The system permits varying transmission delay between the switching center and

Disclosed is a mobile communication system including a network constituted of at least one switching center and a plurality of base stations, and a mobile station which communicates with the base stations simultaneously. The system permits varying transmission delay between the switching center and the base stations according to the type of services available to the mobile station. The object of the present invention is to propose a communication which permits varying transmission delay according to the type of service currently employed, and to promptly recover a synchronization state even if an out-of-sync state happens. To attain the object, a memory means (mobile switching center processor 32) stores transmission delay characteristics corresponding to services which are available to the mobile station. Furthermore, a communication timing setting means (diversity handover trunk 34) determines the timing of communication for the base stations according to the transmission delay characteristic selected according to the service.

대표청구항 ▼

1. 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

1. 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.