Patent ID: 7069051

Claim:
A data transmission method used in a radio system comprising a subscriber terminal and at least one base station which transmits signals to the subscriber terminal by means of its antenna, the method comprising: determining the quality of signals received by the subscriber terminal by comparing the received signals with at least one signal quality threshold level, sending to the base station, which transmitted a signal that exceeded the threshold, information on the antennas which transmitted the signal that exceeded the threshold, or information on transmission directions from which the signal that exceeded the threshold were received, and selecting from the antennas, which transmitted the signal that exceeded the threshold, an antenna or antennas to continue transmission of the signal to said subscriber terminal, or selecting from the transmission directions, from which the signal that exceeded the threshold were received, a transmission direction or directions, in which to continue transmission of the signal to said subscriber terminal, wherein the signals transmitted by the base stations are amplified by amplifiers, and the antenna which is connected to one of the amplifiers with the lowest load is selected as the transmission antenna.