Patent ID: 6584116
Filing Date: 2003-06-24
Classification: H04W

Abstract:
A method of transmission in a UMTS mobile telephone network enabling preparation for handover to a GSM cell during a call in a UMTS cell, the method comprising transporting information in frames each made up of a plurality of time slots, wherein the time slots from each frame being allocated to mobile telephone terminals for communication via the UMTS mobile telephone network, the method further comprising allocating time slots in each frame to a given mobile telephone terminal in such a manner that, at intervals equal to an integer multiple of the duration of a frame, no time slot is allocated to the given mobile telephone terminal for at least one continuous series of time slots whose total duration is at least equal to a predetermined time period, wherein the continuous series of time slots not allocated to the given mobile telephone terminal is used for reception of a broadcast control channel from the GSM cell and pre-synchronization to the GSM cell.