Method, device, and system for downlink data reception and HARQ-ACK transmission in wireless communication system
View Patent ↗The present invention relates to a method, device, and system for downlink data reception and HARQ-ACK transmission in a wireless communication system. According to the present invention, in the method, device, and system for downlink data reception and HARQ-ACK transmission, a first physical downlink control channel (PDCCH) for scheduling of a first physical downlink shared channel (PDSCH) is received, and a second PDCCH for scheduling of a second PDSCH is received. Thereafter, uplink control information (UCI) including a hybrid automatic repeat request (HARQ)-acknowledge (ACK) codebook for the first PDSCH and the second PDSCH is transmitted to a base station.
1. A user equipment of a wireless communication system, the user equipment comprising:
a communication module; and
a processor that controls the communication module,
wherein the processor is configured to:
receive a plurality of first physical downlink control channels (PDCCHs) for downlink scheduling, wherein each first PDCCH includes an Nc-bit count downlink assignment indicator (c-DAI) related to a scheduling order of a corresponding downlink scheduling, and Nc is one of 1 and 2;
receive a second PDCCH for scheduling a physical uplink shared channel (PUSCH), wherein the second PDCCH includes 2-bit uplink DAI (UL-DAI) related to a total number of the downlink scheduling; and
transmit a hybrid automatic repeat request (HARQ)-acknowledge (ACK) codebook for the downlink scheduling via the PUSCH,
wherein a size of the HARQ-ACK codebook is associated with a value O satisfying:
O= 4*(floor( j*C/ 4)+ Q )+ V , where
j is a counter value for a case that a Nc-bit c-DAI has a value of less than or equal to a previous Nc-bit c-DAI within a plurality of received Nc-bit c-DAIs,
C is a value of 2{circumflex over ( )}Nc,
Q is 0 or 1,
V is a value of the 2-bit UL-DAI, and in a range of 1 to 4, and
floor is a flooring function.
2. The user equipment of claim 1 , wherein Nc is 1.
3. The user equipment of claim 1 , wherein the size of the HARQ-ACK codebook is P*O, and P is a number of HARQ-ACK bit(s) provided per a physical downlink shared channel (PDSCH) scheduled by a corresponding first PDCCH.
4. The user equipment of claim 1 , wherein Q is 1 only when V is less than V temp , and
wherein, when Nc is 1, V temp is determined as a 2-bit c-DAI value converted from a last one of the plurality of received Nc-bit c-DAIS, so that the converted 2-bit c-DAI value corresponds to a total number of the downlink scheduling determined based on the plurality of received Nc-bit c-DAIS.
5. The user equipment of claim 4 , wherein a value of the last one of the plurality of received Nc-bit c-DAIS, and the converted 2-bit c-DAI value satisfy a relation including the following table:
X
1
2
1
2
1
2
1
. . .
Y
1
2
3
4
1
2
3
. . .
where X represents the value of the last one of the plurality of received Nc-bit c-DAIs, and Y represents the converted 2-bit c-DAI value.
6. The user equipment of claim 1 , wherein the Nc-bit c-DAI is associated with a bit position of a corresponding HARQ-ACK information in the HARQ-ACK codebook.
7. The user equipment of claim 1 , wherein the wireless communication system includes 3 rd generation partnership project (3GPP)-based wireless communication system.
8. A method performed by a user equipment in a wireless communication system, the method comprising:
receiving a plurality of first physical downlink control channels (PDCCHs) for downlink scheduling, wherein each first PDCCH includes an Nc-bit count downlink assignment indicator (c-DAI) related to a scheduling order of a corresponding downlink scheduling, and Nc is one of 1 and 2;
receiving a second PDCCH for scheduling a physical uplink shared channel (PUSCH), wherein the second PDCCH includes 2-bit uplink DAI (UL-DAI) related to a total number of the downlink scheduling; and
transmitting a hybrid automatic repeat request (HARQ)-acknowledge (ACK) codebook for the downlink scheduling via the PUSCH,
wherein a size of the HARQ-ACK codebook is associated with a value O satisfying:
O= 4*(floor( j*C/ 4)+ Q )+ V , where
j is a counter value for a case that a Nc-bit c-DAI has a value of less than or equal to a previous Nc-bit c-DAI within a plurality of received Nc-bit c-DAIS,
C is a value of 2{circumflex over ( )}Nc,
Q is 0 or 1,
V is a value of the 2-bit UL-DAI, and in a range of 1 to 4, and
floor is a flooring function.
9. The method of claim 8 , wherein Nc is 1.
10. The method of claim 8 , wherein the size of the HARQ-ACK codebook is P*O, and P is a number of HARQ-ACK bit(s) provided per a physical downlink shared channel (PDSCH) scheduled by a corresponding first PDCCH.
11. The method of claim 8 , wherein Q is 1 only when V is less than V temp , and
wherein, when Nc is 1, V temp is determined as a 2-bit c-DAI value converted from a last one of the plurality of received Nc-bit c-DAIS, so that the converted 2-bit c-DAI value corresponds to a total number of the downlink scheduling determined based on the plurality of received Nc-bit c-DAIS.
12. The method of claim 11 , wherein a value of the last one of the plurality of received Nc-bit c-DAIS, and the converted 2-bit c-DAI value satisfy a relation including the following table:
X
1
2
1
2
1
2
1
. . .
Y
1
2
3
4
1
2
3
. . .
where X represents the value of the last one of the plurality of received Nc-bit c-DAIS, and Y represents the converted 2-bit c-DAI value.
13. The method of claim 8 , wherein the Nc-bit c-DAI is associated with a bit position of a corresponding HARQ-ACK information in the HARQ-ACK codebook.
14. The method of claim 8 , wherein the wireless communication system includes 3rd generation partnership project (3GPP)-based wireless communication system.