Evolved node-B, user equipment, and methods for channel quality indicator (CQI) feedback

摘要

Embodiments of User Equipment (UE), an Evolved Node-B (eNB), and methods for channel quality indicator (CQI) feedback are disclosed herein. An aperiodic CQI type parameter received at the UE may indicate a CQI type for use in a determination of an aperiodic CQI based on signals received from the eNB. Channel-state information reference signals (CSI-RS) may be used when single-user multiple-input multiple-output (SU-MIMO) signals are received. Physical downlink shared channel (PDSCH) blocks may be used when multi-user multiple-input multiple-output (MU-MIMO) signals are received. The aperiodic CQI may be transmitted to the eNB as part of an aperiodic CQI measurement report. In addition, periodic CQI measurement reports may also be transmitted to the eNB and may include periodic CQIs that are based on CSI-RS received at the UE.

主权项

1. User Equipment (UE) comprising hardware processing circuitry configured to:
receive, from an Evolved Node-B (eNB), an aperiodic channel quality indicator (CQI) type parameter that indicates either a first or a second aperiodic CQI type for use in a determination of an aperiodic CQI; determine the aperiodic CQI based on the aperiodic CQI type parameter; and transmit an aperiodic CQI measurement report based on the aperiodic CQI, wherein for the first aperiodic CQI type, the aperiodic CQI is based on a signal quality for one or more channel-state information reference signals (CSI-RS) received at the UE, wherein for the second aperiodic CQI type, the aperiodic CQI is based on a signal quality for a physical downlink shared channel (PDSCH) block received at the UE, and wherein the aperiodic CQI type parameter indicates the first aperiodic CQI type when the determination of the aperiodic CQI is for a time period in which the UE is scheduled to receive a single-user multiple-input multiple-output (SU-MIMO) signal from the eNB, and the aperiodic CQI type parameter indicates the second aperiodic CQI type when the determination of the aperiodic CQI is for a time period in which the UE is scheduled to receive a MU-MIMO signal from the eNB.