Patent ID: 9037091
Filing Date: 2015-05-19
Classification: H04B,H04W

Abstract:
1. A method, comprising: receiving data transmitted from a transmitter in a downlink channel; and feeding back channel quality data back to the transmitter using a feedback arrangement comprising a first uplink channel and a second uplink channel, wherein the first uplink channel comprises a primary channel quality indicator (CQI) channel and the second uplink channel comprises a secondary channel quality indicator (CQI) channel; wherein channel quality indicator (CQI) data is fed back periodically via wideband transmission at a lower rate on the first uplink channel and channel quality indicator (CQI) data is fed back on demand via narrowband transmission at a higher rate on the second uplink channel in the event there is a higher amount of data to be fed back; said feeding back on the second uplink channel comprising using link adaptation to select a transmission rate for feeding back CQI data on the second uplink channel; and wherein the first uplink channel is capable of providing a reference for power controlling the downlink channel and the second uplink channel to achieve a minimum signal-to-interference and noise ratio (SINR) so that a lowest or nearly lowest modulation coding scheme (MCS) level may be supported.