×

Channel state information feedback method and apparatus for 2-dimensional massive MIMO communication system

  • US 10,454,555 B2
  • Filed: 05/20/2015
  • Issued: 10/22/2019
  • Est. Priority Date: 05/23/2014
  • Status: Active Grant
First Claim
Patent Images

1. A feedback transmission method of a terminal in a mobile communication system, the method comprising:

  • receiving configuration information for two reference signal (RS) sets;

    receiving feedback configuration information;

    identifying reference antenna port information for the two RS sets;

    receiving two RSs of the two RS sets from a base station;

    estimating a channel between a plurality of antennas of the base station and a plurality of antennas of the terminal based on channels of the received RSs and a relationship between the channels of the received RSs based on a reference antenna port for transmitting both of the received RSs with the same antenna configuration which is indicated by the reference antenna port information; and

    transmitting feedback information on the estimated channel based on the feedback configuration information to the base station,wherein the two RS sets are horizontal and vertical direction RSs for the plurality of antennas of the base station being arranged 2-dimensionally,wherein a horizontal channel state information reference signal (H-CSI-RS) of the two RSs is used for estimating, by the terminal, a horizontal angle between the plurality of antennas of the terminal and the plurality of antennas of the base station and a vertical channel state information reference signal (V-CSI-RS) of the two RSs is used for estimating, by the terminal, a vertical angle between the plurality of antennas of the terminal and the plurality of antennas of the base station,wherein the reference antenna port is an overlapped antenna port between at least one antenna port of a first RS set and at least one antenna port of a second RS set, andwherein the feedback information includes at least one of a precoding matrix indicator or a channel quality indicator associated with a codebook for 2-dimensional antenna array.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×