Method and apparatus for uplink transmissions with different reliability conditions

1. An operation method of a terminal in a communication system, the operation method comprising:

selecting one or more control elements among a plurality of control elements included first uplink control information (UCI) in consideration of a size of an uplink resource;

generating multiplexed UCIs by multiplexing second UCI with the one or more control elements; and

transmitting the multiplexed UCIs to a base station by using the uplink resource,

wherein the uplink resource is a physical uplink control channel (PUCCH) resource, a first codeword for the one or more control elements is generated based on a first code rate, and a second codeword for the second UCI is generated based on a second code rate,

when the first code rate for the PUCCH resource for the first UCI is not indicated, the first code rate is associated with a format of the PUCCH resource for the first UCI.

2. The operation method according to claim 1 , wherein when a total size of the first UCI is a first size, and the first UCI having a second size smaller than the first size is multiplexable with the second UCI, the one or more control elements are selected among the plurality of control elements and transmission of remaining control elements is dropped.

3. The operation method according to claim 1 , wherein when the plurality of control elements include channel state information (CSI) and hybrid automatic repeat request-acknowledgement (HARQ-ACK), the one or more control elements are the HARQ-ACK, a part of the CSI and the HARQ-ACK, a CSI part 1 of the CSI and the HARQ-ACK, or a CSI part 2 of the CSI and the HARQ-ACK.

4. The operation method according to claim 1 , further comprising receiving, from the base station, information indicating multiplexing of the first UCI and the second UCI, wherein the multiplexed UCIs are generated in response to receiving the information.

5. The operation method according to claim 1 , wherein the first UCI is low priority (LP) UCI having a low priority, and the second UCI is high priority (HP) UCI having a high priority.

6. The operation method according to claim 1 , wherein a PUCCH resource set to which the PUCCH resource belongs is determined in consideration of a size of the one or more control elements and a size of the second UCI.

7. The operation method according to claim 1 , further comprising:

receiving first downlink control information (DCI) from the base station; and

receiving second DCI from the base station,

wherein transmission of the first UCI is indicated by the first DCI, and transmission of the second UCI is indicated by the second DCI.

8. The operation method according to claim 1 , wherein the first code rate is associated with a first PUCCH format for the first UCI.

9. The operation method according to claim 1 , wherein a first PUCCH format for the first UCI is derived from first DCI received from the base station, and the second PUCCH format for the second UCI is derived from second DCI received from the base station.

10. The operation method according to claim 1 , wherein when the first code rate for the PUCCH resource for the first UCI is indicated, the first code rate is associated with the PUCCH resource for the first UCI.

11. The operation method according to claim 1 , wherein the PUCCH resource is configured for transmission of the second UCI.

12. A terminal comprising:

a processor;

a memory electronically communicating with the processor; and

instructions stored in the memory,

wherein when executed by the processor, the instructions cause the terminal to:

select one or more control elements among a plurality of control elements included first uplink control information (UCI) in consideration of a size of an uplink resource;

generate multiplexed UCIs by multiplexing second UCI with the one or more control elements; and

transmit the multiplexed UCIs to a base station by using the uplink resource,

wherein the uplink resource is a physical uplink control channel (PUCCH) resource, a first codeword for the one or more control elements is generated based on a first code rate, and a second codeword for the second UCI is generated based on a second code rate,

when the first code rate for the PUCCH resource for the first UCI is not indicated, the first code rate is associated with a format of the PUCCH resource for the first UCI.

13. The terminal according to claim 12 , wherein a total size of the first UCI is a first size, and the first UCI having a second size smaller than the first size is multiplexable with the second UCI, the one or more control elements are selected among the plurality of control elements and transmission of remaining control elements is dropped.

14. The terminal according to claim 12 , wherein when the plurality of control elements include channel state information (CSI) and hybrid automatic repeat request-acknowledgement (HARQ-ACK), the one or more control elements are the HARQ-ACK, a part of the CSI and the HARQ-ACK, a CSI part 1 of the CSI and the HARQ-ACK, or a CSI part 2 of the CSI and the HARQ-ACK.

15. The terminal according to claim 12 , wherein the first code rate is associated with a first PUCCH format for the first UCI, and the first PUCCH format is configured identically to or differently from the second PUCCH format.