Patent ID: 7848295

Claim:
A method for transmitting data through a channel set up between a subscriber station (SS) and a base station (BS) in a wireless communication system, the method comprising the steps of: transmitting, by the BS, a channel state request (CH_STA_REQ) message to the SS for a state report request of the band AMC channel allocated to the SS; measuring, by the SS, reception quality of each band; generating, by the SS, a list of bands having high reception quality according to the reception quality measurements; transmitting, by the SS, a channel state response (CH_STA_RSP) message including the generated list in response to the CH_ST_REQ message to the BS; receiving, by the BS, the CH_STA_RSP message; determining, by the BS, whether the BS can allocate a band AMC channel to the SS in response to the CH_STA_RSP message; transmitting, by the BS, a band AMC indication (BAND_AMC_IND) message including information indicating whether the BS allocates the band AMC channel to the SS; receiving, by the SS, the BAND_AMC_IND message; and transmitting, by the SS, data to the BS using at least one of a diversity channel and the band AMC channel according to the received BAND_AMC_IND message; wherein the CH_STA_RSP message includes information on at least one band index and a Carrier-to-Interference ratio (C/I) of the band AMC channel corresponding to the at least one band index; wherein the band AMC channel includes a plurality of bands, and each band is applied by a different modulation order and coding rate; wherein the CH_STA_RSP message includes a reported channel type field including information on a type of a channel, a state of which the SS will report to the BS, information on a list of channels, a measured quality of each of which the SS reports to the BS, and state information of each channel included in the list; and wherein the information on the type of the channel indicates a channel used when the SS communicates with the BS, if the channel is the diversity channel the CH_STA_RSP message includes information on a Downlink Channel ID of the diversity channel and a C/I of the diversity channel, if the channel is the band AMC channel the CH_STA_RSP message includes information on each Band Index of the band AMC channel and a C/I of the band AMC channel, the band AMC channel is allocated based on a band including 6 bins, the diversity channel is allocated based on a subchannel including three tiles spread over the full subcarrier band, the band AMC channel is larger than the diversity channel in terms of areas allocated therefor, and when reception quality is high the band AMC channel can be used for transmitting or receiving large-volume data at a high speed by applying a modulation scheme having a high coding efficiency.