Transmission of channel quality data in wireless communication systems

摘要

Briefly, in accordance with one or more embodiments, data transmitted from a transmitter is received in a downlink channel, and channel quality data is fed back to the transmitter in a first uplink channel or in a second uplink channel. Channel quality data is feedback at a lower rate on the first uplink channel and channel quality data is feedback at a higher rate on the second uplink channel in the event there is a higher amount of data to be fed back. Link adaptation may be utilized to select a transmission rate on the second uplink channel, wherein the transmission rate is selected based at least in part on a channel condition or a user location.

主权项

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.