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

Abstract

A Channel Status Information (CSI) transmission method and apparatus of a terminal are provided for use in a wireless communication system. In the wireless communication system supporting carrier aggregation, the terminal transmits the CSIs of component carriers without conflict of their transmission time points, resulting in an improvement of system performance. In a case where the transmission time points are determined to overlap unavoidably, the terminal transmits the CSI as compressed.

What is claimed is: 
     
         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.