Patent ID: 6959199

Claim:
A method of controlling a transmission power of a multicast signal that is transmitted from a base station to a plurality of mobile stations through a radio link, comprising the steps of: measuring a value of a received signal quality parameter of a multicast signal received at the mobile stations; transmitting a parameter signal, indicating the received signal quality parameter value, from the mobile stations to the base station through the radio link; receiving the parameter signals from the mobile stations at the base station through the radio link; determining a power control value of each of the mobile stations based on the received signal quality parameter values of the parameter signals received at the base station; and controlling the transmission power of the multicast signal, sent to each of the mobile stations, based on the determined power control value, wherein, in said determining step, the received signal quality parameter values are rearranged into a sequence of the parameter values in a predetermined order, and one of the parameter values in the rearranged sequence that corresponds to a predetermined ratio of the entire mobile stations is determined as being the power control value.