Method for transmitting signal by using multi-beam in wireless communication system, and apparatus therefor
Disclosed in the present application is a method by which a terminal transmits an uplink signal to a base station in a wireless communication system. Particularly, the method comprises the steps of: receiving, from a base station, information on a reception beam pattern, which is defined in a transmission time interval (TTI) unit, of the base station; determining an uplink transmission beam pattern, which is defined in the TTI unit, by using the information on the reception beam pattern of the base station; and sequentially and repetitively transmitting the uplink signal to the base station in the TTI unit according to the uplink transmission beam pattern.
1. 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.
2. The method of claim 1 , wherein the transmitting the uplink signals comprises if receiving an acknowledgement related to one of the uplink signals from the base station during the repeated transmission, stopping the repeated transmission.
3. A user equipment in a wireless communication system, the user equipment comprising:
a wireless communication module; and
a processor connected to the wireless communication module, the processor configured to receive information on an uplink reception beam pattern of the base station defined in a Transmission Time Interval (TTI) unit from the base station, determine an uplink transmission beam pattern defined in the TTI unit using the information on the uplink reception beam pattern of the base station, and transmit repeatedly to the base station 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 the processor is configured to receive two or more reference signals having different downlink transmission beams applied thereto in two or more TTIs from the base station sequentially and to determine 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.
4. The user equipment of claim 3 , wherein if receiving an acknowledgement related to one of the uplink signals from the base station during the repeated transmission, the processor stops the repeated transmission.