METHOD FOR CONTROLLING HANDOVER OF PACKET SWITCH CALL BETWEEN THE FIRST MOBILE COMMUNICATION SYSTEM CAPABLE OF HSPDA SERVICE AND THE SECOND MOBILE COMMUNICATION SYSTEM CAPABLE OF NON-HSPDA SERVICE

摘要

The present invention relates to a packet switch call handover control method between a first mobile communication system capable of a high speed downlink packet access service and a second mobile communication system capable of a high speed downlink packet access service. The method includes the steps of the first mobile communication system transmitting a measurement control message to the terminal when the terminal moves from the service area of the first mobile communication system to the boundary of the service area of the second mobile communication system in a call connection state; The terminal receiving the measurement control message performs a measurement of the joint pilot channel power of the current cell serving as the service area of the first mobile communication system and the neighboring cell serving the service area of the second mobile communication system. Transmitting to the mobile communication system, and analyzing the measurement report message by the first mobile communication system to determine whether a handover to the second mobile communication system is required, and if necessary, to send a packet to the second mobile communication system. And processing a switch call handover.;R5 UMTS, R99 / R4 UMTS, High Speed downlink Packet Access (HSDPA), Handover