Method for transmitting channel information in wireless communication system

A method for transmitting uplink channel information in a wireless communication system, the method comprising:

• receiving a channel information configuration message allocating two channel quality indicator channel (CQICH)s;
• generating an adaptive modulation and coding (AMC) band bitmap indicating at least one AMC band selected from a plurality of AMC bands, the AMC band bitmap having a first payload size;
• transmitting the AMC band bitmap with a first transmission period through the two CQICHs;
• and
• transmitting a channel quality indicator (CQI) and precoding matrix index (PMI), based on the AMC band bitmap, with a second transmission period which is shorter than the first transmission period, through the two CQICHs,
• wherein when a transmission time of the AMC band bitmap is collided to a transmission time of the CQI, only the AMC band bitmap is transmitted through the two CQICH and
• wherein when the first payload size is larger than the a payload size which can be transmitted through a single CQICH among the two CQICHs,
• the AMC band bitmap is divided into two divided AMC band bitmaps such that each of the divided AMC band bitmaps has a second payload size, the second payload size having equal or less bits size than the payload size of the single CQICH and
• the two divided AMC band bitmaps are transmitted through the two CQICHs.