Method and apparatus for controlling the power of terminal in a mobile communication system comprising a femtocell and a macro base station

A method for controlling transmit power by a terminal, the method comprising:

• receiving information on radio resources allocated to use with maximum transmit power from one of macro and femto base stations;
• transmitting data using the maximum transmit power to a base station in communication with the terminal in at least one multiplex group configured to use the maximum transmit power;
• and
• transmitting the data using a transmit power below the maximum transmit power to the base station in communication with the terminal in at least one multiplex group excepted for the at least one multiplex group configured to use the maximum transmit power,
• wherein a plurality of sub frames shared by the macro and femto base stations are grouped into a plurality of interlace groups, each interlace group including at least one sub frame,
• wherein the plurality of interlace groups are re-grouped into a plurality of multiplex groups, each multiplex group including at least one interlace group, and
• wherein the plurality of sub frames are grouped into the plurality of interlace groups according to a retransmission cycle of a sub frame from the terminal to a base station.

A base station for controlling transmit power, the base station comprising:

• a scheduler which performs scheduling by grouping a plurality of sub frames shared by macro and femto base stations into a plurality of interlace groups, each interlace group including at least one sub frame, re-grouping the plurality of interlace groups into a plurality of multiplex groups, each multiplex group including at least one interlace group, allocating radio resources to a first terminal connected to the base station to use maximum transmit power in at least one first multiplex group, and allocating the radio resources to a second terminal connected to another base station to use maximum transmit power in at least one second multiplex group;
• and
• a radio communication unit which transmits allocated radio resource information on the at least one first multiplex group to the first terminal and transmits the allocated radio resource information on the at least one second multiplex group to the second terminal,
• wherein the scheduler groups the at least one sub frame into the plurality of interlace groups according to a retransmission cycle of a sub frame from the terminal to the base station.