METHOD AND AN APPARATUS FOR CONTROLLING BACKWARD POWER IN A WIRELESS COMMUNICATION SYSTEM WHEREIN A MOBILE TERMINAL DETERMINES A REVERSE DATA TRANSFER RATE, CONCERNED WITH ENHANCING REVERSE TRAFFIC RECEPTION PERFORMANCE OF A BASE STATION

摘要

PURPOSE: A method and an apparatus for controlling reverse power in a wireless communication system in which a mobile terminal determines a reverse data transfer rate are provided to enhance reverse traffic reception performance of a base station by using a pilot signal with suitable transmission power. CONSTITUTION: A data transfer rate of the ith frame is 38.4kbps and a mobile terminal controls a data transfer rate up to 76.8kbps in the (i+1)th frame(310). After a base station receives the (i+1)th frame data, it recognizes that the mobile terminal uses the data transfer rate of 76.8kbps and determines that the mobile terminal has included additional pilot power required for channel compensation to a secondary pilot signal in the (i+1)th frame and then transmitted it(330). In the (i+2)th frame, the data transfer rate is controlled to be grater than that of the (i+1)th frame and the base station receives an RRI(Reverse Rate Indicator) that the mobile terminal has transmitted in the (i+2)th frame, recognizes that the secondary pilot signal has been transmitted, and uses it for channel compensation(340). In the (i+3)th frame, the data transfer rate is controlled to be smaller than that of the (i+2)th frame. In this case, the mobile terminal does not transmit the secondary pilot signal(350). In the (i+4)th frame, the data transfer rate is not changed compared to the (i+3)th frame. In this case, the base station does not require additional pilot power to receive the (i+4)th frame data, the mobile terminal does not transmit the secondary pilot signal, and the base station determines that the secondary pilot signal has not been transmitted(360).