Granted Patent B2

US 12,418,365 · App. 17/918,746 · Granted Sep 16, 2025

Inventors: Majid Gerami (Lund, SE); Bikramjit Singh (Kirkkonummi, FI); Reem Karaki (Aachen, DE); Sorour Falahati (Stockholm, SE)

Assignee: Telefonaktiebolaget LM Ericsson (Publ)

H04L1/1812H04W72/11H04W72/1273H04W72/21

Abstract

Claims (59)

1. A method for reporting hybrid automatic repeat request-acknowledgement, HARQ-ACK, code books of fixed sizes in a communication network in a user equipment, UE, communication device, the method comprising:

responsive to operating in a first mode, reporting a HARQ-ACK codebook for each scheduled transmission to a network node;

responsive to operating in a second mode, reporting the HARQ-ACK codebook to the network node if at least one of HARQ-ACK information in the HARQ-ACK codebook is ACK, wherein no NACK is transmitted in the HARQ-ACK codebook when operating in the second mode;

responsive to operating in a third mode, reporting the HARQ-ACK codebook to the network node if at least one of the HARQ-ACK information in the HARQ-ACK codebook is negative acknowledgement, NACK, wherein no ACK is transmitted in the HARQ-ACK codebook when operating in the third mode;

a Type 3 HARQ codebook being used in combination with any of the first mode, the second mode, and the third mode;

extending the Type 3 HARQ codebook to support triggering for a subset of HARQ processes instead of all HARQ processes; and

determining a HARQ feedback to be reported by at least one of:

reporting ACK/NACK to the network node corresponding to a latest obtained feedback for semi-persistent scheduling, SPS, physical downlink shared channel, PDSCH, occasion for a certain HARQ process occurrence before a physical uplink control channel, PUCCH, occasion where Type 3 HARQ codebook should be sent; and

reporting ACK/NACK based on a number of SPS PDSCH occurrences within a past time window.

2. The method of claim 1 , further comprising:

responsive to an SPS PDSCH, not be decoded/detected successfully, skip sending NACK in a PUCCH occasion corresponding to a SPS PDSCH reception.

3. The method of claim 1 , further comprising:

configuring the UE communication device to periodically send, to the network node, HARQ-feedback report that includes feedback corresponding to an SPS configured HARQ processes.

4. The method of claim 1 , further comprising:

responsive to operating in the first mode, transmitting, to the network node, an ACK responsive to correctly decoding PDSCH and transmitting, to the network node, a NACK for cases with no detection or misdetection, or if demodulation reference signal, DMRS, is detected but data is not;

responsive to operating in the second mode, transmitting, to the network node, the ACK responsive to correctly decoding PDSCH and not transmitting, to the network node, a NACK for cases with no detection or misdetection, or if DMRS is detected but data is not;

responsive to operating in the third mode, not transmitting, to the network node, an ACK responsive to correctly decoding PDSCH and transmitting, to the network node, a NACK for cases with no detection or misdetection, or if DMRS is detected but data is not; and

responsive to operating in a fourth mode, transmitting no feedback to the network node.

5. The method of claim 1 , wherein HARQ-feedback uplink control information, UCI, of any type is sent to the network node in a PUCCH or in a PUSCH.

6. The method of claim 1 , further comprising:

responsive to a PUCCH carrying HARQ feedback corresponding to an SPS PDSCH reception colliding with a PUCCH carrying Type3 HARQ codebook, transmitting only the Type3 HARQ codebook to the network node.

7. The method of claim 1 , wherein responsive to downlink control information, DCI, having priority configured, providing feedback to the network node for indicated priority SPSs' PDSCHs in the HARQ-ACK codebook.

8. The method of claim 1 , wherein high priority downlink control information, DCI, asking one-shot based feedback overrides low priority DCI.

9. The method of claim 8 wherein the DCI asking one-shot based feedback is transmitted in PDSCHs.

10. The method of claim 1 , further comprising arranging HARQ-bits in the HARQ-ACK codebook according to HARQ process or according to SPS indices and then according to HARQ processes per SPS index.

11. A communication device for reporting hybrid automatic repeat request-acknowledgement, HARQ-ACK, code books of fixed sizes in a communication network, the communication device comprising:

processing circuitry; and

memory coupled with the processing circuitry, wherein the memory includes instructions that when executed by the processing circuitry causes the communication device to:

responsive to operating in a first mode, report a HARQ-ACK codebook for each scheduled transmission to a network node;

responsive to operating in a second mode, report the HARQ-ACK codebook to the network node if at least one of HARQ-ACK information in the codebook is ACK, wherein no NACK is transmitted in the HARQ-ACK codebook when operating in the second mode;

responsive to operating in a third mode, report the HARQ-ACK codebook to the network node if at least one of the HARQ-ACK information in the HARQ-ACK codebook is negative acknowledgement, NACK, wherein no ACK is transmitted in the HARQ-ACK codebook when operating in the third mode;

a Type 3 HARQ codebook being used in combination with any of the first mode, the second mode, and the third mode;

extend the Type 3 HARQ codebook to support triggering for a subset of HARQ processes instead of all HARQ processes; and

determine a HARQ feedback to be reported by at least one of:

reporting ACK/NACK to the network node corresponding to a latest obtained feedback for semi-persistent scheduling, SPS, physical downlink shared channel, PDSCH, occasion for a certain HARQ process occurrence before a physical uplink control channel, PUCCH, occasion where Type 3 HARQ codebook should be sent; and

reporting ACK/NACK based on a number of SPS PDSCH occurrences within a past time window.

12. The communication device of claim 11 , wherein the memory includes further instructions that when executed by the processing circuitry causes the communication device to:

responsive to a SPS PDSCH not be decoded/detected successfully, skip sending NACK in the PUCCH occasion corresponding to a SPS PDSCH reception.

13. The communication device of claim 11 , wherein the memory includes further instructions that when executed by the processing circuitry causes the communication device to:

configure the communication device to periodically send, to the network node, HARQ-feedback report that includes feedback corresponding to an SPS configured HARQ processes.

14. The communication device of claim 11 , wherein the memory includes further instructions that when executed by the processing circuitry causes the communication device to:

responsive to operating in the first mode, transmit, to the network node, an ACK responsive to correctly decoding PDSCH and transmitting, to the network node, a NACK for cases with no detection or misdetection, or if DMRS is detected but data is not;

responsive to operating in the second mode, transmit, to the network node, the ACK responsive to correctly decoding PDSCH and not transmitting, to the network node, a NACK for cases with no detection or misdetection, or if DMRS is detected but data is not;

responsive to operating in a third mode, not transmit, to the network node, an ACK responsive to correctly decoding PDSCH and transmitting, to the network node, a NACK for cases with no detection or misdetection, or if DMRS is detected but data is not; and

responsive to operating in a fourth mode, transmit no feedback to the network node.

15. The communication device of claim 11 , wherein HARQ-feedback uplink control information, UCI, of any type is sent to the network node in a PUCCH or in a PUSCH.

16. The communication device of claim 11 , wherein the memory includes instructions that when executed by the processing circuitry causes the communication device to:

responsive to a PUCCH carrying HARQ feedback corresponding to an SPS PDSCH reception colliding with a PUCCH carrying Type3 HARQ codebook, transmit only the Type3 HARQ codebook to the network node.

17. The communication device of claim 11 , wherein the memory includes further instructions that when executed by the processing circuitry causes the communication device to:

responsive to downlink control information, DCI, having priority configured, provide feedback to the network node for high priority SPSs' PDSCHs in the HARQ-ACK codebook.

18. A non-transitory computer storage medium storing a computer program comprising program code to be executed by processing circuitry of a communication device, execution of the program code causing the communication device to:

responsive to operating in a first mode, report a hybrid automatic repeat request-acknowledgement, HARQ-ACK, codebook for each scheduled transmission to a network node;

responsive to operating in a second mode, report the HARQ-ACK codebook to the network node if at least one of the HARQ-ACK information in the codebook is ACK, wherein no NACK is transmitted in the HARQ-ACK codebook when operating in the second mode;

responsive to operating in a third mode, report the HARQ-ACK codebook to the network node if at least one of the HARQ-ACK information in the HARQ-ACK codebook is negative acknowledgement, NACK, wherein no ACK is transmitted in the HARQ-ACK codebook when operating in the third mode;

a Type 3 HARQ codebook being used in combination with any of the first mode, the second mode, and the third mode;

extend the Type 3 HARQ codebook to support triggering for a subset of HARQ processes instead of all HARQ processes; and

determine a HARQ feedback to be reported by at least one of:

reporting ACK/NACK to the network node corresponding to a latest obtained feedback for semi-persistent scheduling, SPS, physical downlink shared channel, PDSCH, occasion for a certain HARQ process occurrence before a physical uplink control channel, PUCCH, occasion where Type 3 HARQ codebook should be sent; and

reporting ACK/NACK based on a number of SPS PDSCH occurrences within a past time window.

Assignments (3)

Continuity (2)

References Cited (17)