Hybrid automatic repeat request acknowledgement [HARQ-ACK] feedback techniques
Techniques are described to feedback hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook. For example, a base station can send HARQ-ACK codebook information to a user equipment, schedule retransmission, and transmit a downlink feedback information (DFI) if the user equipment transmits a code block group (CBG) based autonomous transmission. Techniques are also described for a user equipment to improve the feedback HARQ-ACK efficiency for downlink physical downlink shared channel (PDSCH) transmission.
1. A wireless communication method, comprising:
receiving, by a network node, a data transmission from a communication node; and
transmitting to the communication node a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook in a downlink feedback information (DFI) in a downlink control information (DCI), wherein the HARQ-ACK codebook is based on the received data transmission,
wherein a physical downlink control channel (PDCCH) includes the DFI and a DCI format associated with the DCI, and
wherein the PDCCH includes one or more padded zeros in response to a number of bits of the DFI being less than another number of bits corresponding to the DCI format associated with the DFI.
2. The method of claim 1 , wherein the DCI includes a 1-bit indication information that distinguishes whether the DCI is used for scheduling an uplink transmission or for feeding back an acknowledgement or non-acknowledgement for an uplink transmission.
3. The method of claim 1 , wherein the DCI includes information related to a transmit power control (TPC).
4. The method of claim 1 , wherein the DCI includes a carrier indication information.
5. The method of claim 1 , wherein the DFI is carried by a DCI format 0_1.
6. The method of claim 1 ,
wherein the HARQ-ACK codebook corresponds to a number of pre-configured data transmission opportunities in a pre-configured time window,
wherein the HARQ-ACK codebook includes a first set of bits corresponding to a cascading of a plurality of transport blocks (TBs) received in the data transmission in the pre-configured time window, and
wherein the HARQ-ACK codebook includes a second set of bits corresponding to a cascading of a plurality of code block groups (CBGs) within each transport block.
7. A wireless communication method, comprising:
transmitting, by a communication node, a data transmission to a network node; and
receiving, by the communication node, a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook in a downlink control feedback information (DFI) in a downlink control information (DCI), wherein the HARQ-ACK codebook is based on the data transmission received by the network node,
wherein a physical downlink control channel (PDCCH) includes the DFI and a DCI format associated with the DCI, and
wherein the PDCCH includes one or more padded zeros in response to a number of bits of the DFI being less than another number of bits corresponding to the DCI format associated with the DFI.
8. The method of claim 7 , wherein the DCI includes a 1-bit indication information that distinguishes whether the DCI is used for scheduling an uplink transmission or for feeding back an acknowledgement or non-acknowledgement for an uplink transmission.
9. The method of claim 7 , wherein the DCI includes information related to a transmit power control (TPC).
10. The method of claim 7 , wherein the DCI includes a carrier indication information.
11. The method of claim 7 , wherein the DFI is carried by a DCI format 0_1.
12. The method of claim 7 ,
wherein the HARQ-ACK codebook corresponds to a number of pre-configured data transmission opportunities in a pre-configured time window,
wherein the HARQ-ACK codebook includes a first set of bits corresponding to a cascading of a plurality of transport blocks (TBs) transmitted in the data transmission in the pre-configured time window, and
wherein the HARQ-ACK codebook includes a second set of bits corresponding to a cascading of a plurality of code block groups (CBGs) within each transport block.
13. An apparatus for wireless communication comprising a processor, configured to implement a method, comprising:
receive, by a network node, a data transmission from a communication node; and
transmit to the communication node a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook in a downlink control feedback information (DFI) in a downlink control information (DCI), wherein the HARQ-ACK codebook is based on the received data transmission,
wherein a physical downlink control channel (PDCCH) includes the DFI and a DCI format associated with the DCI, and
wherein the PDCCH includes one or more padded zeros in response to a number of bits of the DFI being less than another number of bits corresponding to the DCI format associated with the DFI.
14. The apparatus of claim 13 , wherein the DCI includes a 1-bit indication information that distinguishes whether the DCI is used for scheduling an uplink transmission or for feeding back an acknowledgement or non-acknowledgement for an uplink transmission.
15. The apparatus of claim 13 , wherein the DCI includes information related to a transmit power control (TPC).
16. The apparatus of claim 13 ,
wherein the HARQ-ACK codebook corresponds to a number of pre-configured data transmission opportunities in a pre-configured time window,
wherein the HARQ-ACK codebook includes a first set of bits corresponding to a cascading of a plurality of transport blocks (TBs) received in the data transmission in the pre-configured time window, and
wherein the HARQ-ACK codebook includes a second set of bits corresponding to a cascading of a plurality of code block groups (CBGs) within each transport block.
17. An apparatus for wireless communication comprising a processor, configured to implement a method, comprising:
transmit, by a communication node, a data transmission to a network node; and
receive, by the communication node, a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook in a downlink feedback information (DFI) in a downlink control information (DCI), wherein the HARQ-ACK codebook is based on the data transmission received by the network node,
wherein a physical downlink control channel (PDCCH) includes the DFI and a DCI format associated with the DCI, and
wherein the PDCCH includes one or more padded zeros in response to a number of bits of the DFI being less than another number of bits corresponding to the DCI format associated with the DFI.
18. The apparatus of claim 17 , wherein the DCI includes a 1-bit indication information that distinguishes whether the DCI is used for scheduling an uplink transmission or for feeding back an acknowledgement or non-acknowledgement for an uplink transmission.
19. The apparatus of claim 17 , wherein the DCI includes information related to a transmit power control (TPC).
20. The apparatus of claim 17 ,
wherein the HARQ-ACK codebook corresponds to a number of pre-configured data transmission opportunities in a pre-configured time window,
wherein the HARQ-ACK codebook includes a first set of bits corresponding to a cascading of a plurality of transport blocks (TBs) transmitted in the data transmission in the pre-configured time window, and
wherein the HARQ-ACK codebook includes a second set of bits corresponding to a cascading of a plurality of code block groups (CBGs) within each transport block.