Patent ID: 8265012
Filing Date: 2012-09-11
Classification: H04L,H04W

Abstract:
1. An adaptive subchannel and bit allocation method in a wireless communication system, the method comprising: analyzing, by a mobile station, channel quality information of a subchannel at a predetermined period and determining feedback band indexes with a predetermined maximum decision criterion based on the channel quality information from among all feedback band indexes for all of a plurality of subcarrier bands, the mobile station being located in a boundary between base stations constituting the wireless communication system, wherein each of the subchannels is divided into a diversity subchannel for acquisition of frequency diversity gain and an adaptive modulation and coding (AMC) subchannel for high-speed, high-capacity data transmission, and wherein a number of determined feedback band indexes with the predetermined maximum criterion is less than a number of all feedback band indexes for all of the plurality of subcarrier bands; feeding back, by the mobile station, feedback information including the determined feedback band indexes to a base station; generating, by the base station, band allocation information using the feedback information from the mobile station, and transmitting the band allocation information to the mobile station; transmitting, by the mobile station, a pilot for AMC using the band allocation information received from the base station; and estimating, by the base station, a channel using the pilot transmitted from the mobile station and allocating bits to an allocated band using the band allocation information according to the channel estimation result; wherein determining the feedback band indexes with the predetermined maximum decision criterion from among all the feedback band indexes for all of the plurality of subcarrier bands comprises determining the feedback band indexes of subcarrier bands with a best channel condition among the subchannels.