Transmission of acknowledgement signals in a communication system

A terminal for transmitting hybrid automatic repeat request acknowledgement (HARQ-ACK) information in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to control to:
• receive one or more transport blocks,
• determine a number of HARQ-ACK bits in response to the one or more transport blocks,
• determine an uplink resource for transmission of the HARQ-ACK bits, and
• transmit the HARQ-ACK bits by using the determined uplink resource,
• wherein the uplink resource is associated with a first modulation order or with a second modulation order depending on the number of HARQ-ACK bits, and
• wherein the first modulation order is different from the second modulation order.

A method for receiving hybrid automatic repeat request acknowledgement (HARQ-ACK) information by a base station in a wireless communication system, the method comprising:

• transmitting one or more transport blocks;
• determining a number of HARQ-ACK bits in response to the one or more transport blocks;
• determining an uplink resource for transmission of the HARQ-ACK bits;
• and
• receiving the HARQ-ACK bits by using the determined uplink resource,
• wherein the uplink resource is associated with a first modulation order or with a second modulation order depending on the number of HARQ-ACK bits, and
• wherein the first modulation order is different from the second modulation order.

A base station for receiving hybrid automatic repeat request acknowledgement (HARQ-ACK) information by a base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured control to:
• transmit one or more transport blocks,
• determine a number of HARQ-ACK bits in response to the one or more transport blocks,
• determine an uplink resource for transmission of the HARQ-ACK bits, and
• receive the HARQ-ACK bits by using the determined uplink resource,
• wherein the uplink resource is associated with a first modulation order or with a second modulation order depending on the number of HARQ-ACK bits, and
• wherein the first modulation order is different from the second modulation order.