Method for transmitting and receiving uplink data in wireless communication system and device for same

A method for receiving, by a base station (BS), an uplink (UL) data in a wireless communication system, the method comprising:

• transmitting a first UL grant to a user equipment (UE);
• receiving a first UL data from the UE;
• transmitting, to the UE, a hybrid automatic repeat request (HARQ) response of the first UL data;
• and
• receiving, from the UE, a second UL data,
• wherein the second UL data is a retransmission data of the first UL data or a new data.

A user equipment (UE) for transmitting an uplink (UL) data in a wireless communication system, comprising:

• a transceiver for transmitting and receiving a radio signal;
• memory;
• and
• a processor connected to the transceiver and the memory,
• wherein the processor is configured to:
• receive a first UL grant from a base station (BS);
• transmit, to the BS, a first UL data based on the first UL grant;
• receive a hybrid automatic repeat request (HARD) response of the first UL data from the BS;
• and
• transmit, to the BS, a second UL data,
• wherein the second UL data is a retransmission data of the first UL data or a new data.