IP Library › Granted Patent US 12684574
Granted Patent B2
US 12684574 · App. 18/304,960 · Granted Jul 14, 2026

Method and device for transmitting and receiving hybrid automatic retransmission request acknowledgement information

Inventors: Jingxing Fu (Beijing, CN); Feifei Sun (Beijing, CN)
Assignee: Samsung Electronics Co., Ltd.
H04W72/1273H04L1/1812H04W72/21
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Quick Facts
Patent No.
US 12684574
App. No.
18/304,960
Granted
Jul 14, 2026
Kind
B2
Abstract

The disclosure relates to a 5th generation (5G) or 6th generation (6G) communication system for supporting a higher data transmission rate. A method and device for transmitting hybrid automatic repeat request acknowledgement (HARQ-ACK) information are provided. The method includes receiving, from a base station (BS), downlink control information (DCI) scheduling one or more multicast physical downlink shared channels (PDSCHs), wherein the DCI includes a downlink assignment indication (DAI) associated with the one or more multicast PDSCHs, receiving, from the BS, the one or more multicast PDSCHs based on the DCI, in case that a number of hybrid automatic repeat request-acknowledgement (HARQ-ACK) bits for the one or more multicast PDSCHs is one, transmitting, to the BS, a first physical uplink control channel (PUCCH) resource including a NACK (negative acknowledgement) value, and in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is more than one, transmitting, to the BS, a second PUCCH resource among configured PUCCH resources according to the number of the HARQ-ACK bits.

Claims (68)

1 . A user equipment (UE) in a wireless communication system, the UE comprising:

at least one transceiver; and

at least one processor communicatively coupled to the at least one transceiver; and

at least one memory, communicatively coupled to the at least one processor, storing instructions executable by the at least one processor individually or in any combination to cause the UE to:

receive, from a base station (BS), information configuring a physical uplink control channel (PUCCH) resource set including PUCCH resources,

receive, from the BS, downlink control information (DCI) including a downlink assignment indication (DAI), for one or more multicast physical downlink shared channels (PDSCHs),

receive, from the BS, the one or more multicast PDSCHs,

identify a number of hybrid automatic repeat request-acknowledgement (HARQ-ACK) bits for the one or more multicast PDSCHs based on the DAI in the DCI,

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is one, transmit, to the BS, a first PUCCH on a first PUCCH resource among the PUCCH resource set, the first PUCCH being associated with a negative acknowledgement (NACK) value,

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is two, transmit, to the BS, a second PUCCH on a second PUCCH resource which is one of first three PUCCH resources among the PUCCH resource set,

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is three, transmit, to the BS, a third PUCCH on a third PUCCH resource which is one of first seven PUCCH resources among the PUCCH resource set, and

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is four, transmit, to the BS, a fourth PUCCH on a fourth PUCCH resource which is one of first fifteen PUCCH resources among the PUCCH resource set,

wherein a PUCCH for the HARQ-ACK bits is not transmitted when all of the HARQ-ACK bits correspond to ACK values.

2 . The UE of claim 1 , wherein the first PUCCH resource or the second PUCCH resource is identified among the PUCCH resource set based on a value of the HARQ-ACK bits.

3 . The UE of claim 1 ,

wherein the HARQ-ACK bits are transmitted based on a NACK-only feedback mode,

wherein the second PUCCH is determined according to a combination of two HARQ-ACK bits for the one or more multicast PDSCHs,

wherein the third PUCCH is determined according to a combination of three HARQ-ACK bits for the one or more multicast PDSCHs, and

wherein the fourth PUCCH is determined according to a combination of four HARQ-ACK bits for the one or more multicast PDSCHs.

4 . A base station (BS) in a wireless communication system, the BS comprising:

at least one transceiver; and

at least one processor communicatively coupled to the at least one transceiver; and

at least one memory, communicatively coupled to the at least one processor, storing instructions executable by the at least one processor individually or in any combination to cause the BS to:

transmit, to a user equipment (UE), information configuring a physical uplink control channel (PUCCH) resource set including PUCCH resources,

transmit, to the UE, downlink control information (DCI) including a downlink assignment indication (DAI), for one or more multicast physical downlink shared channels (PDSCHs),

transmit, to the UE, the one or more multicast PDSCHs, wherein a number of hybrid automatic repeat request-acknowledgement (HARQ-ACK) bits for the one or more multicast PDSCHs is determined based on the DAI in the DCI,

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is one, receive, from the UE, a first PUCCH on a first PUCCH resource among the PUCCH resource set, the first PUCCH being associated with a negative acknowledgement (NACK) value, and

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is two, receive, from the UE, a second PUCCH on a second PUCCH resource which is one of first three PUCCH resources among the PUCCH resource set,

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is three, receive, from the UE, a third PUCCH on a third PUCCH resource which is one of first seven PUCCH resources among the PUCCH resource set, and

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is four, receive, from the UE, a fourth PUCCH on a fourth PUCCH resource which is one of first fifteen PUCCH resources among the PUCCH resource set,

wherein a PUCCH for the HARQ-ACK bits is not transmitted when all of the HARQ-ACK bits correspond to ACK values.

5 . The BS of claim 4 , wherein the first PUCCH resource or the second PUCCH resource is identified among the PUCCH resource set based on a value of the HARQ-ACK bits.

6 . The BS of claim 4 ,

wherein the HARQ-ACK bits are received based on a NACK-only feedback mode,

wherein the second PUCCH is determined according to a combination of two HARQ-ACK bits for the one or more multicast PDSCHs,

wherein the third PUCCH is determined according to a combination of three HARQ-ACK bits for the one or more multicast PDSCHs, and

wherein the fourth PUCCH is determined according to a combination of four HARQ-ACK bits for the one or more multicast PDSCHs.

7 . A method performed by a user equipment (UE) in a wireless communication system, the method comprising:

receiving, from a base station (BS), information configuring a physical uplink control channel (PUCCH) resource set including PUCCH resources;

receiving, from the BS, downlink control information (DCI) including a downlink assignment indication (DAI), for one or more multicast physical downlink shared channel (PDSCHs);

receiving, from the BS, the one or more multicast PDSCHs;

identifying a number of hybrid automatic repeat request-acknowledgement (HARQ-ACK) bits for the one or more multicast PDSCHs based on the DAI in the DCI;

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is one, transmitting, to the BS, a first PUCCH on a first PUCCH resource among the PUCCH resource set, the first PUCCH being associated with a negative acknowledgement (NACK) value; and

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is two, transmitting, to the BS, a second PUCCH on a second PUCCH resource which is one of first three PUCCH resources among the PUCCH resource set;

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is three, transmitting, to the BS, a third PUCCH on a third PUCCH resource which is one of first seven PUCCH resources among the PUCCH resource set; and

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is four, transmitting, to the BS, a fourth PUCCH on a fourth PUCCH resource which is one of first fifteen PUCCH resources among the PUCCH resource set,

wherein a PUCCH for the HARQ-ACK bits is not transmitted when all of the HARQ-ACK bits correspond to ACK values.

8 . The method of claim 7 , wherein the first PUCCH resource or the second PUCCH resource is identified among the PUCCH resource set based on a value of the HARQ-ACK bits.

9 . The method of claim 7 ,

wherein the HARQ-ACK bits are transmitted based on a NACK-only feedback mode,

wherein the second PUCCH is determined according to a combination of two HARQ-ACK bits for the one or more multicast PDSCHs,

wherein the third PUCCH is determined according to a combination of three HARQ-ACK bits for the one or more multicast PDSCHs, and

wherein the fourth PUCCH is determined according to a combination of four HARQ-ACK bits for the one or more multicast PDSCHs.

10 . A method performed by a base station (BS) in a wireless communication system, the method comprising:

transmitting, to a user equipment (UE), information configuring a physical uplink control channel (PUCCH) resource set including PUCCH resources;

transmitting, to the UE, downlink control information (DCI) including a downlink assignment indication (DAI), for one or more multicast physical downlink shared channels (PDSCHs);

transmitting, to the JE, the one or more multicast PDSCHs, wherein a number of hybrid automatic repeat request-acknowledgement (HARQ-ACK) bits for the one or more multicast PDSCHs is determined based on the DAI in the DCI;

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is one, receiving, from the UE, a first PUCCH on a first PUCCH resource among the PUCCH resource set, the first PUCCH being associated with a negative acknowledgement (NACK) value; and

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is two, receiving, from the UE, a second PUCCH on a second PUCCH resource which is one of first three PUCCH resources among the PUCCH resource set;

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is three, receiving, from the UE, a third PUCCH on a third PUCCH resource which is one of first seven PUCCH resources among the PUCCH resource set; and

in case that the number of HARQ-ACK bits for the one or more multicast PDSCHs is four, receiving, from the UE, a fourth PUCCH on a fourth PUCCH resource which is one of first fifteen PUCCH resources among the PUCCH resource set,

wherein a PUCCH for the HARQ-ACK bits is not transmitted when all of the HARQ-ACK bits correspond to ACK values.

11 . The method of claim 10 , wherein the first PUCCH resource or the second PUCCH resource is identified among the PUCCH resource set based on a value of the HARQ-ACK bits.

12 . The method of claim 10 ,

wherein the HARQ-ACK bits are received based on a NACK-only feedback mode,

wherein the second PUCCH is determined according to a combination of two HARQ-ACK bits for the one or more multicast PDSCHs,

wherein the third PUCCH is determined according to a combination of three HARQ-ACK bits for the one or more multicast PDSCHs, and

wherein the fourth PUCCH is determined according to a combination of four HARQ-ACK bits for the one or more multicast PDSCHs.