Method and apparatus for transmitting and receiving feedback information in mobile communication system based on 2 dimensional massive MIMO

A method for feedback information reception by a base station in a mobile communication system, the method comprising:

• transmitting reference signal (RS) configuration information on at least two reference signals and feedback configuration information for generating feedback information based on the at least two reference signals to a terminal, the feedback configuration information including precoding matrix indicator (PMI) codebook information and at least one of a number of reference signals for generating the feedback information, channel information corresponding to respective reference signals, feedback time information, or interference measurement resource information;
• transmitting the at least two reference signals to the terminal;
• and
• receiving the feedback information generated based on the feedback configuration information from the terminal,
• wherein the at least two reference signals respectively correspond to first and second direction antenna groups of a plurality of antennas arranged 2-dimentionally at the base station.

A terminal for transmitting feedback information in a mobile communication system, the terminal comprising:

• one or more antennas;
• and
• a controller configured to:
• control to receive, via one or more of the antennas, reference signal (RS) configuration information on at least two reference signals and feedback configuration information for generating feedback information based on the at least two reference signals from a base station and, afterward, to receive, via one or more of the antennas, the at least two reference signals from the base station, the feedback configuration information including precoding matrix indicator (PMI) codebook information and at least one of a number of reference signals for generating the feedback information, channel information corresponding to respective reference signals, feedback time information, or interference measurement resource information,
• measure the received at least two reference signals,
• generate the feedback information based on the measuring according to the feedback configuration information, and
• control to transmit, via one or more of the antennas, the feedback information to the base station,
• wherein the at least two reference signals respectively correspond to first and second direction antenna groups of a plurality of antennas arranged 2-dimentionally at the base station.

A base station for receiving feedback information in a mobile communication system, the base station comprising:

• a plurality of antennas;
• and
• a controller configured to control to transmit, via one or more of the antennas, reference signal (RS) configuration information on at least two reference signals and feedback configuration information for generating feedback information based on the at least two reference signals to a terminal and, afterward, to transmit, via one or more of the antennas, the at least two reference signals to the terminal, the feedback configuration information including precoding matrix indicator (PMI) codebook information and at least one of a number of reference signals for generating the feedback information, channel information corresponding to respective reference signals, feedback time information, or interference measurement resource information;
• and to receive, via one or more of the antennas, the feedback information generated based on the feedback configuration information from the terminal,
• wherein the at least two reference signal respectively correspond to first and second direction antenna groups of a plurality of antennas arranged 2-dimensionally at the base station.