Method for transmitting signal by using multi-beam in wireless communication system, and apparatus therefor

A method of transmitting uplink signals to a base station by a user equipment in a wireless communication system, the method comprising:

• receiving information on an uplink reception beam pattern of the base station defined in a Transmission Time Interval (TTI) unit from the base station;
• determining an uplink transmission beam pattern defined in the TTI unit using the information on the uplink reception beam pattern of the base station;
• and
• transmitting repeatedly to the base station the uplink signals having same data and same redundancy version (RV) in the TTI unit on each of a plurality of different uplink beams of the uplink transmission beam pattern,
• wherein receiving the information on the uplink reception beam pattern of the base station comprises:
• receiving two or more reference signals having different downlink transmission beams applied thereto in two or more TTIs from the base station sequentially;
• and
• determining the uplink reception beam pattern of the base station using the different downlink transmission beams, based on that a downlink channel and an uplink channel are identical to each other,
• wherein the base station informs the user equipment that a reception beam to be used by the base station on attempting a reception at each of the repeated transmissions is identical to a transmission beam of a specific reference signal, and
• wherein the repeatedly transmitted uplink signals have an identical redundancy version for a single Hybrid Automatic Repeat and request (HARQ) process.