Patent ID: 9210708
Filing Date: 2015-12-08
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A method for a wireless system employing orthogonal frequency division multiple access (OFDMA) at least on a downlink, the method comprising: measuring, at a first step by a subscriber unit, first channel and interference information pertinent to a plurality of OFDMA subcarriers based on a first pilot symbol received from a base station; providing, at a second step by the subscriber unit to the base station, first feedback information as to a plurality of clusters, each of which includes at least two OFDMA subcarriers of the plurality of OFDMA subcarriers; receiving, at a third step by the subscriber unit, first allocation information as to a first plurality of OFDMA subcarriers from the base station for use by the subscriber unit; measuring, at a fourth step by the subscriber unit, second channel and interference information pertinent to the plurality of OFDMA subcarriers based on a second pilot symbol received from the base station; providing, at a fifth step by the subscriber unit to the base station, second feedback information as to the plurality of clusters; and receiving, at a sixth step by the subscriber unit, second allocation information as to a second plurality of OFDMA subcarriers from the base station for use by the subscriber unit; the first feedback information including indices relating to a first modulation and coding rate respectively for each cluster of the plurality of clusters; and the second feedback information including indices relating to a second modulation and coding rate respectively for each cluster of the plurality of clusters.