Method and apparatus for retransmitting synchronous and asynchronous data in wireless communication system

A method performed by a base station in a wireless communication system, the method comprising:

• transmitting, to a terminal, a first control message including downlink control information (DCI) which schedules data transmission, the DCI including an indicator indicating a determination rule of a hybrid automatic repeat request (HARQ) process ID and a HARQ process ID field;
• and
• receiving, from the terminal, a response to the data transmission according to a HARQ process based on a combination of the HARQ process ID and a slot index of a slot in which the first control message is transmitted,
• wherein in case that the indicator is set to a first value, the HARQ process ID is determined as a value in the HARQ process ID field,
• wherein in case that the indicator is set to a second value, the HARQ process ID is determined based on the slot index and the value in the HARQ process ID field, and
• wherein the HARQ process is determined among two or more different HARQ processes corresponding to the same HARQ process ID based on the slot index.

A terminal in a wireless communication system, the terminal comprising:

• a transceiver configured to transmit and receive a signal;
• and
• a controller connected to the transceiver,
• wherein the controller is configured to:
• receive, from a base station, a first control message including downlink control information (DCI) which schedules data transmission, the DCI including an indicator indicating a determination rule of a hybrid automatic repeat request (HARQ) process ID and a HARQ process ID field,
• determine the HARQ process ID based on the indicator and the HARQ process ID field,
• determine a HARQ process corresponding to the data transmission, based on a combination of the HARQ process ID and a slot index of a slot in which the first control message is received, and
• transmit, to the base station, a response to the data transmission according to the HARQ process,
• wherein in case that the indicator is set to a first value, the HARQ process ID is determined as a value in the HARQ process ID field,
• wherein in case that the indicator is set to a second value, the HARQ process ID is determined based on the slot index and the value in the HARQ process ID field, and
• wherein the HARQ process is determined among two or more different HARQ processes corresponding to the same HARQ process ID based on the slot index.

A base station in a wireless communication system, the base station comprising:

• a transceiver configured to transmit and receive a signal;
• and
• a controller connected to the transceiver,
• wherein the controller is further configured to:
• transmit, to a terminal, a first control message including downlink control information (DCI) which schedules data transmission, the DCI including an indicator indicating a determination rule of a hybrid automatic repeat request (HARQ) process ID and a HARQ process ID field, and
• receive, from the terminal, a response to the data transmission according to a HARQ process based on a combination of the HARQ process ID and a slot index of a slot in which the first control message is transmitted,
• wherein in case that the indicator is set to a first value, the HARQ process ID is determined as a value in the HARQ process ID field,
• wherein in case that the indicator is set to a second value, the HARQ process ID is determined based on the slot index and the value in the HARQ process ID field, and
• wherein the HARQ process-corresponds to one related to the slot index, is determined among two or more different HARQ processes corresponding to the same HARQ process ID based on the slot index.