Patent ID: 7333812

Claim:
A transmission power control method for controlling transmission power of downlink signals from base stations to a mobile terminal in a mobile communications system, comprising the steps of: selecting, at the mobile terminal, a first base station, said first base station transmitting user data in a downlink signal with a preferred reception quality; transmitting, from the mobile terminal, identification of the selected first base station to the first base station and other base stations not selected by said mobile terminal; determining, at the mobile terminal, a likelihood of transmission power of downlink signals from the selected first base station and the other base stations not selected by said mobile terminal, said other base stations transmitting user data in said downlink signals to the mobile terminal after the identification of the selected first base station is transmitted; determining weights for each of the other base stations based on a degree of likelihood of transmitting downlink user data; and sending information, from the mobile terminal to the selected first base station and the other base stations, to modify the transmission power of the downlink signals of the selected first base station and the other base stations based on the determined likelihood of transmission power of the downlink signals from said selected first base station and said other base stations not selected by said mobile terminal such that the downlink signals from the other base stations are individually weighted based on the determined weights to produce weighted downlink signals, wherein said other base stations terminate transmission of user data to said mobile terminal if said identification, which is transmitted by said mobile terminal, is properly received at the other base stations, and said other base stations continue to transmit user data after said selecting of the first base station if said identification of the selected first base station transmitted by said mobile terminal is not properly received at the other base stations, wherein said other base stations transmit user data to said mobile terminal prior to the selecting of said first base station, and said other base stations do not properly receive said identification of the selected first base station and continue to transmit without terminating transmission of user data, wherein the information sent from the mobile terminal to the selected first base station and the other base stations to modify the transmission power of the downlink signals of the selected first base station and the other base stations is transmitted while the first base station is selected as transmitting user data with the preferred reception quality.