Patent ID: 9578532
Date: 2017-02-21
CPC Classifications: H04B,H04L,H04W

Claim:
1. A method for measuring, by a user equipment (UE), a channel quality indicator (CQI) in a wireless communication system, the method comprising: receiving, from a base station, at least one of a cell-specific reference signal (CRS) and a channel state information reference signal (CSI RS) transmitted in a cell-specific manner; receiving, from the base station, a demodulation reference signal (DMRS) transmitted in a UE-specific manner in an enhanced physical downlink control channel (e-PDCCH) region configured within a physical downlink shared channel (PDSCH) region; receiving, from the base station, a command for a measurement of the CQI; if the command for the measurement of the CQI indicates whether the UE measures the CQI based on at least one of the CRS or the CSI RS or based on the DMRS, measuring the CQI based on either at least one of the CRS and the CSI RS or the DMRS according to the command for the measurement of the CQI; and if the command for the measurement of the CQI does not indicate whether the UE measures the CQI based on at least one of the CRS or the CSI RS or based on the DMRS: wherein the e-PDCCH port information is antenna port information used by the DMRS.