Patent ID: 8848629

Claim:
A method for transmitting, by a user equipment, an uplink control signal in a wireless communication system, the method comprising: receiving a first transport block through a first physical downlink shared channel (PDSCH) indicated by a first physical downlink control channel (PDCCH) on a first downlink (DL) carrier in carrier aggregation; receiving a second transport block through a second PDSCH indicated by a second PDCCH on a second DL carrier in carrier aggregation; obtaining a first resource based on the first PDCCH; obtaining a second resource based on the second PDCCH; and selecting one of the first resource and the second resource; and transmitting an uplink control signal on a single physical uplink control channel (PUCCH) using the selected one of the first resource and the second resource, wherein the uplink control signal and the selection of the first resource and the second resource are based on an acknowledgement (ACK)/non-acknowledgement (NACK) information for the first transport block and the second transport block.