Patent ID: 7697486

Claim:
A power control apparatus in a UE (User Equipment) for an NB-TDD (Narrow Band Time Division Multiplexing) CDMA mobile communication system, wherein transmission frames each have two sub-frames, and each of the sub-frames has uplink time slots and downlink time slots, each including two data parts having the same length, a midamble intervening between the data parts, the power control apparatus performing power control by receiving a radio signal having a sub-frame structure through a single antenna, the power control apparatus comprising: a plurality of fingers, each including: a time demultiplexer for separating a midamble signal from the radio signal having the sub-frame structure; a power measurer for measuring a power level depending on the midamble signal on a sub-frame unit basis and outputting a measured power level; and a power control signaling part for receiving measured power levels output from the plurality of fingers, and creating based on the measured power levels a power control command to be transmitted to a Node B over an uplink time slot assigned to itself among uplink time slots of the sub-frame.