Method for transmitting and receiving uplink signal in wireless communication system supporting unlicensed band and apparatus for supporting same

A user equipment transmitting an uplink signal to a base station in a wireless communication system supporting an unlicensed band, the user equipment comprising:

• a receiver;
• a transmitter;
• and
• a processor configured to operate in a manner of being connected with the receiver and the transmitter, the processor configured to receive an uplink grant for scheduling uplink signal transmission for one or more subframes from the base station, wherein the uplink grant individually indicates a redundancy version (RV) value for each of the one or more subframes, the processor configured to transmit the uplink signal in the one or more subframes scheduled by the uplink grant by applying an identical RV value to a plurality of codewords for each of the one or more subframes.

A base station receiving an uplink signal from a user equipment in a wireless communication system supporting an unlicensed band, the base station comprising:

• a receiver;
• a transmitter;
• and
• a processor configured to operate in a manner of being connected with the receiver and the transmitter, the processor configured to transmit an uplink grant for scheduling uplink signal transmission for one or more subframes to the user equipment, wherein the uplink grant individually indicates a redundancy version (RV) value for each of the one or more subframes, the processor configured to receive the uplink signal of which an identical RV value is applied to a plurality of codewords for each of the one or more subframes from the user equipment in the one or more subframes scheduled by the uplink grant.