Method and apparatus for transmitting uplink control information in a wireless communication system

An apparatus for transmitting uplink control information, the apparatus comprising:

• a radio frequency (RF) unit for transmitting or receiving a radio signal;
• and
• a processor coupled to the RF unit,
• wherein the processor is configured for:
• generating a spread sequence by block-wise spreading of modulation symbol sequences with an orthogonal sequence;
• and
• transmitting the spread sequence to a base station through an uplink control channel in a subframe,
• wherein the modulation symbol sequences are generated by modulating encoded information bits and the encoded information bits are generated by performing channel coding on information bits of the UCI and
• wherein when the subframe is configured for transmission of a scheduling request (SR) and when transmission of a hybrid automatic repeat request(HARQ)-acknowledgement(ACK) coincides with the subframe,
• the information bits of the UCI comprise concatenation of HARQ-ACK information bits for each of serving cells and a SR information bit, and wherein the SR information bit is appended to the end of the concatenated HARQ-ACK information bits, and
• wherein transmission power of the uplink control channel is determined based on a bit number of the HARQ-ACK information bits and a value determined by whether the subframe is configured for a scheduling request or not.