Patent ID: 8750882

Claim:
A method for controlling power cooperatively among two or more base stations (BSs) in a cooperative unit, the method comprising: receiving, at a specific BS in the cooperative unit from a specific user equipment (UE) located on a cell edge of the specific BS, an average transmission rate of the specific UE and a token value that indicates an up-to-date level of satisfaction of a minimum average transmission rate of the specific UE; receiving, at the specific BS, information including average transmission rates of UEs located on cell edges of one or more other BSs in the cooperative unit, token values of the UEs located on the cell edges, and current power levels of the one or more other BSs from the one or more other BSs; calculating, at the specific BS, a first power level vector of each of the BSs in the cooperative unit, which guarantees minimum average transmission rates of UEs located on cell edges of the BSs, using the minimum average transmission rates and token values of the specific UE and the UEs located on the cell edges of the one or more other BSs in the cooperative unit; and calculating, at the specific BS, a second power level vector corresponding to an updated power level of each of the BSs in the cooperative unit based on current power levels of the BSs and the first power level.