Methods for transmitting and receiving channel state information (csi) and apparatuses thereof

A user equipment (UE) for transmitting a channel state information (CSI) in a wirless communication system, the UE comprising:

• a radio frequency (RF) unit for transmitting or receiving a radio signal;
• and
• a processor for controlling the RF unit,
• wherein the processor controls the RF unit to receive control information about a transmission of the CSI from a serving eNodeB, allocates a CSI combination composed of different CSIs to one subframe based on the received control information, and controls the RF unit to transmit the CSI combination to the serving eNodeB in the allocated subframe,
• wherein the control information includes information on a maximum payload size of a CSI being able to be transmitted in one subframe, a transmission period and a transmission start time point of the CSI combination, and a transmission period and a transmission start time point of each of the different CSIs.

A method for receiving, by an eNodeB, a channel state information (CSI) in a wireless communication system, the method comprising:

• transmitting control information on transmission of the CSI to a user equipment (UE);
• and
• receiving, from the UE, a CSI combination in a subframe to which the CSI combination has been allocated based on the control information,
• wherein the CSI combination comprises different CSIs, and
• wherein the control information includes information on a maximum payload size of a CSI being able to be transmitted in one subframe, a transmission period and a transmission start time point of the CSI combination, and a transmission period and a transmission start time point of each of the different CSIs.

An eNodeB for receiving a channel state information (CSI) in a wireless communication system, the eNodeB comprising:

• a radio frequency unit for transmitting and receiving a radio signal;
• and
• a processor for controlling the RF unit,
• wherein the processor controls the RF unit to transmit control information on transmission of the CSI to a user equipment (UE) and to receive the CSI combination, from the UE, in a subframe to which the CSI combination has been allocated based on the control information,
• wherein the CSI combination comprises different CSIs,
• wherein the control information includes information on a maximum payload size of a CSI being able to be transmitted in one subframe, a transmission period and a transmission start time point of the CSI combination, and a transmission period and a transmission start time point of each of the different CSIs.