Patent ID: 6801785
Filing Date: 2004-10-05
Classification: H04W

Abstract:
A method for controlling transmission power in CDMA system which comprises a base station providing a service area and a mobile station existing on the service area and in which the base station and the mobile station communicate with each other on the traffic channels of forward and reverse links during normal data transmission, the method comprising:before the mobile station is in dormancy, establishing power control channels of forward and reverse links between the mobile station and the base station, the power control channels of forward and reverse links being independent of the traffic channels of forward and reverse links, the power control channels being used only when the mobile station is in dormancy; and when the mobile station is in dormancy, transmitting a dormant power control signal from the base station to the mobile station through the power control channel of the forward link; carrying out at the mobile station a dormant power control process according to the dormant power control signal transmitted from the base station, so as to produce a reference data signal which is subject to the dormant power control process; and transmitting the power-controlled data signal from the mobile station to the base station, so that the base station produces the dormant power control signal in accordance with a reception level of the reference data signal, and thereby, closed loop power control for dormant mobile station is achieved.