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 downlink control information (DCI) format in a slot #n, wherein the DCI format requests uplink control information (UCI) re-transmission and includes:
a modulation and coding scheme (MCS) field, and
a physical downlink shared channel-to-hybrid automatic repeat request (PDSCH-to-HARQ) feedback timing indicator field; and
transmit HARQ-acknowledgement (HARQ-ACK) information in-associated with a slot #(n−k) via a physical uplink control channel (PUCCH) in a slot #(n+p), wherein the k is determined based on a value of the MCS field, and wherein the slot #(n+p) is after the slot #(n−k), and the p is determined based on a value of the PDSCH-to-HARQ feedback timing indicator 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 in slot #(n−k).
3. The UE of claim 1 , wherein the HARQ-ACK information in associated with slot #(n−k) is HARQ-ACK information with a lower priority among a plurality of HARQ-ACK information in slot #(n−k).
4. The UE of claim 1 , wherein the DCI format further includes a PUCCH indicator, and the PUCCH is indicated by using a value of the PUCCH indicator among a plurality of PUCCH candidates.
5. The UE of claim 1 , wherein the DCI format does not schedule a PDSCH.
6. A method for use by a user equipment (UE) in a wireless communication system, the method comprising:
receiving a downlink control information (DCI) format in a slot #n, wherein the DCI format requests uplink control information (UCI) re-transmission and includes:
a modulation and coding scheme (MCS) field, and
a physical downlink shared channel-to-hybrid automatic repeat request (PDSCH-to-HARQ) feedback timing indicator field; and
transmitting HARQ-acknowledgement (HARQ-ACK) information in-associated with a slot #(n−k) via a physical uplink control channel (PUCCH) in a slot #(n+p),
wherein the k is determined based on a value of the MCS field, and
wherein the slot #(n+p) is after the slot #(n−k), and the p is determined based on a value of the PDSCH-to-HARQ feedback timing indicator field.
7. The method of claim 6 , 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 in slot #(n−k).
8. The method of claim 6 , wherein the HARQ-ACK information associated with slot #(n−k) is HARQ-ACK information with a lower priority among a plurality of HARQ-ACK information in slot #(n−k).
9. The method of claim 6 , wherein the DCI format further includes a PUCCH indicator, and the PUCCH is indicated by using a value of the PUCCH indicator among a plurality of PUCCH candidates.
10. The method of claim 6 , wherein the DCI format does not schedule a PDSCH.
11. 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 downlink control information (DCI) format in a slot #n, wherein the DCI format requests uplink control information (UCI) re-transmission and includes:
a modulation and coding scheme (MCS) field, and
a physical downlink shared channel-to-hybrid automatic repeat request (PDSCH-to-HARQ) feedback timing indicator field; and
receive HARQ-acknowledgement (HARQ-ACK) information in-associated with a slot #(n−k) via a physical uplink control channel (PUCCH) in a slot #(n+p),
wherein the k is determined based on a value of the MCS field, and
wherein the slot #(n+p) is after the slot #(n−k), and the p is determined based on a value of the PDSCH-to-HARQ feedback timing indicator field.
12. The BS of claim 11 , 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 in slot #(n−k).
13. The BS of claim 11 , wherein the HARQ-ACK information in associated with slot #(n−k) is HARQ-ACK information with a lower priority among a plurality of HARQ-ACK information in slot #(n−k).
14. The BS of claim 11 , wherein the DCI format further includes a PUCCH indicator, and the PUCCH is indicated by using a value of the PUCCH indicator among a plurality of PUCCH candidates.
15. The BS of claim 11 , wherein the DCI format does not schedule a PDSCH.
16. A method for use by a base station (BS) in a wireless communication system, the method comprising:
transmitting a downlink control information (DCI) format in a slot #n, wherein the DCI format requests uplink control information (UCI) re-transmission and includes:
a modulation and coding scheme (MCS) field, and
a physical downlink shared channel-to-hybrid automatic repeat request (PDSCH-to-HARQ) feedback timing indicator field; and
receiving HARQ-acknowledgement (HARQ-ACK) information in-associated with a slot #(n−k) via a physical uplink control channel (PUCCH) in a slot #(n+p),
wherein the k is determined based on a value of the MCS field, and
wherein the slot #(n+p) is after the slot #(n−k), and the p is determined based on a value of the PDSCH-to-HARQ feedback timing indicator field.
17. The method of claim 16 , 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 in slot #(n−k).
18. The method of claim 16 , wherein the HARQ-ACK information associated with slot #(n−k) is HARQ-ACK information with a lower priority among a plurality of HARQ-ACK information in slot #(n−k).
19. The method of claim 16 , wherein the DCI format further includes a PUCCH indicator, and the PUCCH is indicated by using a value of the PUCCH indicator among a plurality of PUCCH candidates.
20. The UE-method of claim 16 , wherein the DCI format does not schedule a PDSCH.