Patent ID: 7933195

Claim:
A method for transmitting by a Mobile Subscriber Station (MSS) channel quality information (CQI) in a wireless communication system using an Orthogonal Frequency Division Multiplexing (OFDM) scheme or an Orthogonal Frequency Division Multiple Access (OFDMA) scheme, the method comprising the steps of: measuring CQI values of a plurality of bands each comprised of a predetermined number of adjacent subcarriers for a band Adaptive Modulation and Coding (AMC) operation; generating an absolute CQI using the measured CQI values for at least two specific bands along with band indexes of the specific bands; transmitting the absolute CQI to a Base Station (BS); selecting at least two bands from among all of the bands according to the absolute CQI; measuring CQI values for the selected bands; generating a differential CQI by comparing the measured CQI values of the selected bands with previous CQI values for the selected bands; and transmitting information related to the differential CQI from the MSS to the BS for the band AMC operation; wherein the absolute CQI is transmitted via a Report Response (REP-RSP) message and the information related to the differential CQI is transmitted via a CQI Channel (CQICH).