Method of transmitting reference signal for multi user mutliplexing in multi-antenna-based wireless communication system and apparatus therefor

A user equipment (UE) in a wireless communication system, the UE comprising:

• a wireless communication module configured to transceive a signal with a network;
• and
• a processor configured to:
• process the signal;
• configure a plurality of parameter sets via a higher layer signaling;
• receive a downlink control signal comprising information on an antenna port for a demodulation-reference signal (DM-RS) and a number of layers;
• and
• receive the DM-RS and a downlink data signal corresponding to the DM-RS based on the downlink control signal,
• wherein the downlink control signal comprises an indicator for indicating one of a plurality of the parameter sets,
• wherein each of a plurality of the parameter sets comprises information indicating a scrambling identifier of the DM-RS,
• wherein the scrambling identifier of the DM-RS is mapped to a virtual cell identifier for generating the DM-RS sequence,
• wherein the scrambling identifier of the DM-RS has a value of 0 or 1, and
• wherein a virtual cell identifier corresponding to the scrambling identifier 0 of the DM-RS is different from a virtual cell identifier corresponding to the scrambling identifier 1 of the DM-RS.