Method, apparatus, and system for transmitting uplink control information in wireless communication system
The present specification relates to a method, an apparatus, and a system for transmitting uplink control information in a wireless communication system. The present specification provides a terminal comprising: a processor configured to determine a UCI to be dropped from among a first UCI having a first priority and a second UCI having a second priority or to multiplex the first UCI and the second UCI, under the condition in which a first PUCCH, to which the first UCI is mapped, and a second PUCCH, to which the second UCI is mapped, overlap in at least one symbol with respect to time; and a communication module configured to transmit an undropped UCI from among the first UCI and the second UCI to a base station or transmit a third PUCCH, in which the first UCI and the second UCI are multiplexed to be mapped thereto, to the base station according to the control of the processor. Communication reliability can be increased by multiplexing and transmitting UCIs having different priorities or later retransmitting a dropped UCI.
1. A user equipment (UE) for use in a wireless communication system, the UE comprising:
a processor; and
a communication module,
wherein the processor is configured to:
receive a request for uplink control information (UCI) re-transmission in a slot #n via a downlink control information (DCI) format for downlink scheduling, wherein the DCI format includes a modulation and coding scheme (MCS) field; and
based on the request for UCI re-transmission, perform a re-transmission of hybrid automatic repeat request acknowledgement (HARQ-ACK) information scheduled in a slot #(n−k) via a physical uplink control channel (PUCCH) in a slot after the slot #(n−k),
wherein the k is determined based on a value of the MCS field.
2. The UE of claim 1 , wherein the DCI format further includes an indication information, and the indication information is associated with the HARQ-ACK information among a plurality of HARQ-ACK information scheduled in the slot #(n−k).
3. The UE of claim 1 , wherein the HARQ-ACK information is one of a plurality of HARQ-ACK information scheduled in the slot #(n−k), with a lower priority.
4. The UE of claim 1 , wherein the DCI format further includes a physical downlink shared channel (PDSCH)-to-HARQ feedback timing indicator field, and
wherein the re-transmission of HARQ-ACK information is performed in a slot #(n+p), and the p is indicated by a value of the PDSCH-to-HARQ feedback timing indicator field.
5. The UE of claim 1 , wherein the DCI format further includes a PUCCH indicator, and the PUCCH is indicated by a value of the PUCCH indicator among a plurality of PUCCH candidates.
6. The UE of claim 1 , wherein, based on the request for UCI re-transmission, the DCI format does not schedule a physical downlink shared channel (PDSCH) reception.
7. A method for use by a user equipment (UE) in a wireless communication system, the method comprising:
receiving a request for uplink control information (UCI) re-transmission in a slot #n via a downlink control information (DCI) format for downlink scheduling, wherein the DCI format includes a modulation and coding scheme (MCS) field; and
based on the request for UCI re-transmission, performing a re-transmission of hybrid automatic repeat request acknowledgement (HARQ-ACK) information scheduled in a slot #(n−k) via a physical uplink control channel (PUCCH) in a slot after the slot #(n−k),
wherein the k is determined based on a value of the MCS field.
8. The method of claim 7 , wherein the DCI format further includes an indication information, and the indication information is associated with the HARQ-ACK information among a plurality of HARQ-ACK information scheduled in the slot #(n−k).
9. The method of claim 7 , wherein the HARQ-ACK information is one of a plurality of HARQ-ACK information scheduled in the slot #(n−k), with a lower priority.
10. The method of claim 7 , wherein the DCI format further includes a physical downlink shared channel (PDSCH)-to-HARQ feedback timing indicator field, and
wherein the re-transmission of HARQ-ACK information is performed in a slot #(n+p), and the p is indicated by a value of the PDSCH-to-HARQ feedback timing indicator field.
11. The method of claim 7 , wherein the DCI format further includes a PUCCH indicator, and the PUCCH is indicated by a value of the PUCCH indicator among a plurality of PUCCH candidates.
12. The method of claim 7 , wherein, based on the request for UCI re-transmission, the DCI format does not schedule a physical downlink shared channel (PDSCH) reception.
13. A base station (BS) for use in a wireless communication system, the BS comprising:
a processor; and
a communication module,
wherein the processor is configured to:
transmit a request for uplink control information (UCI) re-transmission in a slot #n via a downlink control information (DCI) format for downlink scheduling, wherein the DCI format includes a modulation and coding scheme (MCS) field; and
based on the request for UCI re-transmission, perform a re-reception of hybrid automatic repeat request acknowledgement (HARQ-ACK) information scheduled in a slot #(n−k) via a physical uplink control channel (PUCCH) in a slot after the slot #(n−k),
wherein the k is associated with a value of the MCS field.
14. The BS of claim 13 , wherein the DCI format further includes an indication information, and the indication information is associated with the HARQ-ACK information among a plurality of HARQ-ACK information scheduled in the slot #(n−k).
15. The BS of claim 13 , wherein the HARQ-ACK information is one of a plurality of HARQ-ACK information scheduled in the slot #(n−k), with a lower priority.
16. The BS of claim 13 , wherein the DCI format further includes a physical downlink shared channel (PDSCH)-to-HARQ feedback timing indicator field, and
wherein the re-transmission of HARQ-ACK information is performed in a slot #(n+p), and the p is associated with a value of the PDSCH-to-HARQ feedback timing indicator field.
17. The BS of claim 13 , wherein the DCI format further includes a PUCCH indicator, and the PUCCH is associated with a value of the PUCCH indicator among a plurality of PUCCH candidates.
18. The BS of claim 13 , wherein, based on the request for UCI re-transmission, the DCI format does not schedule a physical downlink shared channel (PDSCH) reception.
19. A method for use by a base station (BS) in a wireless communication system, the method comprising:
transmitting a request for uplink control information (UCI) re-transmission in a slot #n via a downlink control information (DCI) format for downlink scheduling, wherein the DCI format includes a modulation and coding scheme (MCS) field; and
based on the request for UCI re-transmission, performing a re-reception of hybrid automatic repeat request acknowledgement (HARQ-ACK) information scheduled in a slot #(n−k) via a physical uplink control channel (PUCCH) in a slot after the slot #(n−k),
wherein the k is associated with a value of the MCS field.
20. The method of claim 19 , wherein the DCI format further includes an indication information, and the indication information is associated with the HARQ-ACK information among a plurality of HARQ-ACK information scheduled in the slot #(n−k).
21. The method of claim 19 , wherein the HARQ-ACK information is one of a plurality of HARQ-ACK information scheduled in the slot #(n−k), with a lower priority.
22. The method of claim 19 , wherein the DCI format further includes a physical downlink shared channel (PDSCH)-to-HARQ feedback timing indicator field, and
wherein the re-transmission of HARQ-ACK information is performed in a slot #(n+p), and the p is associated with a value of the PDSCH-to-HARQ feedback timing indicator field.
23. The method of claim 19 , wherein the DCI format further includes a PUCCH indicator, and the PUCCH is associated with a value of the PUCCH indicator among a plurality of PUCCH candidates.
24. The method of claim 19 , wherein, based on the request for UCI re-transmission, the DCI format does not schedule a physical downlink shared channel (PDSCH) reception.