Patent ID: 6289009
Filing Date: 2001-09-11
Classification: H04W

Abstract:
A CDMA transceiver used in a mobile station in a mobile communication system comprising a base station and one or more mobile stations for communication using a direct spread code division multiple access system, whereinthe CDMA transceiver determines a mean transmission power on the basis of a transmission power control signal received from the base station, the mean transmission power being equal to the transmission power when transmission is ""on"" multiplied by a transmission ""on"" time ratio;the CDMA transceiver changes the transmission ""on"" time ratio of a transmitting amplifier based on the determined mean transmission power;the mobile station transmits data in frames of a predetermined time length, the frames each having N (N being an interger equal to 2 or greater) slots of a predetermined time length,the transceiver comprising a controller which on-off controls the transmission of the data to change a transmission on-off ratio for each slot; andthe controller controls the transmission to be performed only in one slot when the mean transmission power is lower than 1/N of a maximum transmission power of the transmitting amplifier, and in m (m being an integer in a range between 2 and N inclusive) slots when the mean transmission power is higher than 1/N of the maximum transmission power of the transmitting amplifier.