Patent ID: 7355960
Filing Date: 2008-04-08
Classification: H04B,H04L,H04W

Abstract:
1. A method for defining at least one subcarrier as a subchannel, dividing a total frequency band into a plurality of subchannels, and allocating the subchannels to at least one mobile station in an Orthogonal Frequency Division Multiple Access (OFDMA) wireless communication system, the method comprising the steps of: receiving channel state information of the subchannels from the at least one mobile station; comparing the received channel state information with a predetermined threshold; determining a number of cases in which the received channel state information is greater than the predetermined threshold; calculating an average occurrence length of the case in which the received channel state information is greater than the predetermined threshold, from the determined values separately stored for the subchannels for a predetermined period; calculating a state hold prediction value for a next state of which a channel state information is greater than the threshold, from the calculated average occurrence length; and calculating an estimation value for the next state from the state hold prediction value and a current channel state value.