Method and apparatus for transmitting channel state information in wireless communication system

A method of transmitting channel state information (CSI) of a user equipment to which a plurality of serving cells are allocated in a wireless communication system, the method comprising:

• generating a CSI for at least one serving cell among the plurality of serving cells;
• and
• transmitting the generated CSI through a physical uplink shared channel (PUSCH) which is an uplink data channel,
• wherein if the PUSCH does not have an uplink grant which is corresponding uplink scheduling information and is transmitted by using a resource predetermined by a higher layer signal, the CSI transmitted through the PUSCH is transmitted within a range of a predetermined upper limit.

A user equipment comprising:

• a radio frequency (RF) unit for transmitting and receiving a radio signal;
• and
• a processor operatively coupled to the RF unit,
• wherein the processor is configured for:
• receiving configuration information for configuring groups including at least one serving cell from the plurality of serving cells;
• and
• transmitting a periodic channel state information (CSI) for a group selected according to a priority between the groups, when a periodic CSI for each of the groups is configured to be transmitted in the same subframe,
• wherein a periodic CSI for each of at least two serving cells is transmitted together when the at least two serving cells are included in the selected group.

A user equipment comprising:

• a radio frequency (RF) unit for transmitting and receiving a radio signal;
• and
• a processor operatively coupled to the RF unit,
• wherein the processor generates channel state information (CSI) for at least one serving cell among the plurality of serving cells, and transmits the generated CSI through a physical uplink shared channel (PUSCH) which is an uplink data channel, wherein if the PUSCH does not have an uplink grant which is corresponding uplink scheduling information and is transmitted by using a resource predetermined by a higher layer signal, the CSI transmitted through the PUSCH is transmitted within a range of a predetermined upper limit.