A method for power control of tfci field in a mobile communication system of 3gpp standard

PURPOSE: A power controlling method of a TFCI(Transport Format Combination Indicator) field for a DSCH(Downlink Shared Channel) in a mobile communication system is provided to minimize an information loss even when a DCH(Dedicated Channel) relating to the DSCH is in a soft hand-over condition. And the method is provided to control power for a TFCI bit separately from the DCH and according to a TPC(Transmit Power Command) for controlling power of the DSCH, so as to receive power of the TFCI to generate the TPC even when the DSCH is not transmitted. CONSTITUTION: A TFCI field that indicates a transmit format of a DSCH used by many users within a DCH is distinguished from other fields. The transmit power control of the distinguished TFCI field is controlled in proportional to the power control of the DSCH. When two bits as a TFCI bit for the DSCH and a TFCI bit for the DCH are allocated in the TFCI field, entire TFCI field is adjusted to a level of the transmit power of the TFCI field indicating the transmit format of the DSCH. Accordingly, the transmit power of the TFCI field for the DSCH is controlled in a mobile communication system.