Method and apparatus for transmitting uplink control signal in wireless communication system

A method for allocating resources enabling a user equipment to transmit an ACK/NACK (Acknowledgement/Negative-ACK) signal in a wireless communication system, the method comprising:

• mapping, by the user equipment, some of multiple ACK/NACK signals to selection information, the selection information being configured of a combination of a message area and a reference signal area;
• based upon the mapped selection information, independently selecting, by the user equipment, one message area and one reference signal area among multiple control channel resources, the multiple control channel resources being located in a same physical resource block;
• allocating, by the user equipment, the selected message area to remaining ACK/NACK signals;
• and
• transmitting, by the user equipment, ACK/NACK signals to a base station by using the selected message area and the selected reference signal area,
• wherein, when a number of the multiple control channel resources is equal to N, a size of the some of the ACK/NACK signals corresponds to a number of bits smaller than log2(N*N) bits or equal to log2{N*N} bits, wherein the number of bits is an integer.

A user equipment, comprising:

• a processor configured to map some of multiple ACK/NACK signals to reference signal area selection information, to select one or more reference signal areas among multiple control channel resources, based upon the mapped reference signal area selection information, the multiple control channel resources being located in a same physical resource block, and to allocate a message area of each of the multiple control channel resources to remaining ACK/NACK signals;
• and
• a transmitter configured to transmit ACK/NACK signals to a base station by using the one or more selected reference signal areas and the allocated message area of each of the multiple control channel resources,
• wherein,
• when a number of reference signal areas included in the multiple control channel resources is equal to N, and
• when a number of the selected reference signal areas is equal to K,
• a size of the some of the ACK/NACK signals corresponds to a number of bits smaller than log2{NCK} bits or equal to log2{NCK} bits, wherein the number of bits is an integer.

A user equipment, comprising:

• a processor configured to map some of multiple ACK/NACK signals to selection information, the selection information being configured of a combination of a message area and a reference signal area, to independently select one message area and one reference signal area among multiple control channel resources, based upon the mapped selection information, the multiple control channel resources being located in a same physical resource block, and to allocate the selected message area to remaining ACK/NACK signals;
• and
• a transmitter configured to transmit ACK/NACK signals to a base station by using the selected message area and the selected reference signal area,
• wherein, when a number of the multiple control channel resources is equal to N, a size of the some of the ACK/NACK signals corresponds to a number of bits smaller than log2(N*N) bits or equal to log2{N*N} bits, wherein the number of bits is an integer.