Patent ID: 9219572
Filing Date: 2015-12-22
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A method, comprising: transmitting, at a first time by a base station, at least a first pilot symbol to a subscriber unit for measuring the at least a first pilot symbol and obtaining first channel and interference information for a plurality of orthogonal frequency division multiple access (OFDMA) subcarriers; receiving, by the base station from the subscriber unit, after the transmitting of the at least first pilot symbol to the subscriber unit, first feedback of channel and interference information relating to a plurality of clusters, each cluster of the plurality of clusters having at least two OFDMA subcarriers of the plurality of OFDMA subcarriers, the receiving of the first feedback of channel and interference information includes receiving first indications of modulation and coding rates associated with each cluster of the plurality of clusters; transmitting, by the base station to the subscriber unit, a first allocation of OFDMA subcarriers of the plurality of OFDMA subcarriers selected by the base station for use by the subscriber unit, after, and based on at least the receiving of the first feedback of channel and interference information; transmitting, at a second time after the first time, by the base station, at least a second pilot symbol to the subscriber unit for measuring the at least second pilot symbol and obtaining second channel and interference information for the plurality of OFDMA subcarriers; receiving, by the base station from the subscriber unit, after the transmitting of the at least second pilot symbol to the subscriber unit, second feedback of channel and interference information relating to the plurality of clusters, the receiving of the second feedback of channel and interference information includes receiving second indications of modulation and coding rates associated with each cluster of the plurality of clusters; and transmitting, by the base station to the subscriber unit, a second allocation of OFDMA subcarriers of the plurality of OFDMA subcarriers selected by the base station for use by the subscriber unit, after, and based on at least the receiving of the second feedback of channel and interference information.