Method and apparatus for transmitting/receiving CSI in cellular communication system supporting carrier aggregation

1. A Channel Status Information (CSI) transmission method of a terminal in a wireless communication system supporting carrier aggregation, the method comprising:

receiving CSI configuration information for a plurality of component carriers from a base station, the plurality of component carriers comprising a first component carrier and a second component carrier;

determining whether CSI transmission time of the first component carrier and CSI transmission time of the second component carrier are identical based on analyzing the configuration information;

transmitting,

if other information to be transmitted at the CSI transmission time exists, the other information without the CSI at the CSI transmission time;

identifying, if the other information to be transmitted at the CSI transmission time does not exist, whether the CSI transmission time of the first and second component carriers are identical and the first component carrier and the second component carrier have different priorities; and

transmitting, if the CSI transmission time of the first and second component carriers are identical and the first component carrier and the second component carrier have different priorities, a CSI of a component carrier having a highest priority at the transmission time.

2. The method of claim 1 , wherein the other information is composed of multiple bits.

3. The method of claim 1 , wherein the other information is ACK/NACK information.

4. The method of claim 1 ,

wherein data is aggregated and transmitted per component carrier, and

wherein the CSI configuration information is defined per component carrier.

5. A Channel Status Information (CSI) reception method of a base station in a wireless communication system supporting carrier aggregation, the method comprising:

transmitting CSI configuration information on a plurality of component carriers, the plurality of component carriers comprising a first component carrier and a second component carrier;

receiving,

if other information to be transmitted at the CSI transmission time exists, the other information without the CSI at the CSI transmission time; and

receiving, if the other information to be transmitted at the CSI transmission time does not exist and if the CSI transmission time of the first and second component carriers are identical and the first component carrier and the second component carrier have different priorities, a CSI generated for a component carrier having a highest priority at the transmission time.

6. The method of claim 5 , wherein the other information is composed of multiple bits.

7. The method of claim 5 , wherein the other information is ACK/NACK information.

8. The method of claim 5 ,

wherein data is aggregated and transmitted per component carrier, and

wherein the CSI configuration information is defined per component carrier.

9. An apparatus for transmitting Channel Status Information (CSI) for a terminal in a wireless communication system supporting carrier aggregation, the apparatus comprising:

a controller configured to:

receive CSI configuration information for a plurality of component carriers from a base station, the plurality of component carriers comprising a first component carrier and a second component carrier,

determine whether CSI transmission time of the first component carrier and CSI transmission time of the second component carrier are identical based on analyzing the configuration information, and

identify, if other information to be transmitted at the CSI transmission time does not exist, whether the CSI transmission time of the first and second component carriers are identical and the first component carrier and the second component carrier have different priorities; and

a formatter configured to:

transmit, if the other information to be transmitted at the CSI transmission time exists, the other information without the CSI at the CSI transmission time, and

transmit, if the CSI transmission time of the first and second component carriers are identical and the first component carrier and the second component carrier have different priorities, a CSI generated for a component carrier having a highest priority at the transmission time.

10. The apparatus of claim 9 , wherein the other information is composed of multiple bits.

11. The apparatus of claim 9 , wherein the other information is ACK/NACK information.

12. The apparatus of claim 9 ,

wherein data is aggregated and transmitted per component carrier, and

wherein the CSI configuration information is defined per component carrier.

13. An apparatus for receiving Channel Status Information (CSI) for a base station in a wireless communication system supporting carrier aggregation, the apparatus comprising:

a scheduler configured to transmit CSI configuration information for a plurality of component carriers, the plurality of component carriers comprising a first component carrier and a second component carrier; and

a controller configured to:

receive, if other information to be transmitted at the CSI transmission time exists, the other information without the CSI at the CSI transmission time, and

receive, if the other information to be transmitted at the CSI transmission time does not exist and the CSI transmission time of the first and second component carriers are identical and the first component carrier and the second component carrier have different priorities, a CSI of a component carrier having a highest priority at the transmission time.

14. The apparatus of claim 13 , wherein the other information is composed of multiple bits.

15. The apparatus of claim 13 , wherein the other information is ACK/NACK information.

16. The apparatus of claim 13 ,

wherein data is aggregated and transmitted per component carrier, and

wherein the CSI configuration information is defined per component carrier.