US 2018/0123772 A1 · METHOD AND APPARATUS FOR DETERMINING QUANTITY OF CHANNEL QUALITY INDICATORS (CQI)

Abstract

Provided are a method and apparatus for determining the quantity of channel quality indicators (CQI). The method comprises: a terminal determining the quantity of layers or the quantity of CQIs to be fed back according to at least one piece of the following pieces of information: the quantity of ports of a channel state information referenced signal (CSI-RS), the quantity of ports of a downlink demodulation reference signal (DMRS), and a configuration signalling of a base station. The present invention solves the problem of non-matching between CQIs reported by a TDD system under an FD-MIMO and CQIs actually needing to be used in the related art, improves the reliability of downlink transmission, saves overheads of a downlink signalling, and improves the downlink transmission performance

Claims29

Dependent claims

A method for determining a number of Channel Quality Indicators (CQI) comprising:

determining, by a terminal, the number of layers or the number of CQIs to be fed back according to at least one of following pieces of information:
a number of Channel State Information Reference Signal (CSI-RS) ports, a number of downlink Demodulation Reference Signal (DMRS) ports, and configuration signaling of a base station.

Dependencies are inferred from the claim text.

Method and apparatus for determining quantity of channel quality indicators (cqi)

Life of this patent

Method and apparatus for determining quantity of channel quality indicators (cqi)

Life of this patent

Abstract

Claims29