Method and apparatus for transmitting uplink control information in wireless access system

A User Equipment (UE) for transmitting only Uplink Control Information (UCI) without uplink data on a Physical Uplink Shared CHannel (PUSCH) in a wireless access system supporting Carrier Aggregation (CA), the UE comprising;

• a reception module;
• a transmission module;
• and
• a processor configured to support transmission of only the UCI on the PUSCH,
• wherein the UE receives a Physical Downlink Control Channel (PDCCH) signal including Downlink Control Information (DCI) format 4 from a Base Station (BS) through the reception module, allocates resources for transmitting the UCI based on the DCI format 4, calculates the number of code symbols for transmitting the UCI, and channel-encodes the UCI, through the processor, and transmits only the channel-encoded UCI without the uplink data on the PUSCH to the BS through the transmission module.