Patent ID: 8666442

Claim:
A method for controlling an uplink (UL) power by a Mobile Station (MS) in a wireless communication system including an upper-layer Base Station (BS) and a lower-layer BS whose cell coverage is narrower than that of the upper-layer BS, the method comprising: measuring a first received signal strength of a first reference signal received from the upper-layer BS, and a second received signal strength of a second reference signal received from the lower-layer BS; acquiring a transmission (TX) power ratio representative of a ratio of a first TX power of the upper-layer BS to a second TX power of the lower-layer BS; selecting a UL serving BS to which the MS will transmit a UL signal, from among the upper-layer BS and the lower-layer BS, and determining a UL TX power, based on the first received signal strength, the second received signal strength, and the TX power ratio; and transmitting the UL signal to the UL serving BS using the UL TX power.