Mobile communication system, base station apparatus, and method of controlling mobile communication system

Abstract

In a mobile communication system, interference power from adjacent cells is effectively reduced and transmission power is limited. A transmission loss estimation unitand a transmission power estimation unitestimate transmission power necessary for transmission of a downstream signal. According to an upstream signal from each of plurality of mobile terminal devices to a base station, a grouping unitdivides a plurality of mobile terminal devices into groups sharing a plurality of wireless resources according to the estimated transmission powers. Downstream signals to be transmitted to mobile terminal devices belonging to each of the groups formed by the grouping means are transmitted simultaneously with each other. Also, priorities are set for the plurality of wireless resources and the mobile terminal devices belonging to the groups divided by the grouping unitare assigned according to the set priorities. Accordingly, transmission to one of the groups requiring higher transmission power in one of cells adjacent to each other and transmission to one of the groups requiring higher transmission power in another of the cells are performed at different times, thereby reducing interference power received in each cell from the adjacent cells.