Method for configuring reference signal for three-dimensional MIMO in wireless communication system and apparatus therefor

A method of receiving channel status information (CSI) for multiple input multiple output (MIMO) based beamforming by a base station in a wireless communication system, the method comprising:

• transmitting reference signal configuration information including two or more reference signal resources information to a user equipment (UE) through a higher layer;
• transmitting CSI process information to the UE through the higher layer;
• transmitting, to the UE, a reference signal based on the reference signal configuration information;
• and
• receiving the CSI calculated based on the CSI process information and the received reference signal from the UE,
• wherein the CSI process information includes a reference signal type indicator indicating a mapping relation between the reference signal configuration information and multiple, wherein the reference signal type indicator indicates a first type reference signal configuration or a second type reference signal configuration,
• wherein, if the reference signal type indicator indicates the first type reference signal configuration, the two or more reference signal resources information correspond to all columns or all rows of the multiple antennas, and
• wherein, if the reference signal type indicator indicates the second type reference signal configuration, one of the two or more reference signal resources information corresponds to a row in the multiple antennas and another of the two or more reference signal resources information corresponds to a column in the multiple antennas.