Patent ID: 9450718
Filing Date: 2016-09-20
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A method of estimating channel quality information, wherein a macro cell includes multiple transmission points, the method comprising: receiving the channel quality information which is measured by a user equipment based on a cell specific reference signal; obtaining channel matrix information for the multiple transmission points; calculating beamforming information on a single cell transmission and a coordinated multi-point transmission based on the channel matrix information; and estimating the channel quality information for the single cell transmission and the coordinated multi-point transmission based on the channel quality information, the channel matrix information, and the beamforming information, wherein the beamforming information comprises beamforming matrix information and beamforming gain information, and wherein the estimating the channel quality information for the single cell transmission and the coordinated multi-point transmission comprises: estimating noise and interference from outside of the macro cell based on the channel quality information, the channel matrix information, and antenna virtualization matrix information for the multiple transmission points; estimating noises and interferences from the inside of the macro cell for the single cell transmission and the coordinated multi-point transmission based on the channel matrix information and the beamforming matrix information; and calculating the channel quality information for the single cell transmission and the coordinated multi-point transmission based on the beamforming gain information, the noise and interference from the outside of the macro cell, and the noises and interferences from the inside of the macro cell for the single cell transmission and the coordinated multi-point transmission.