Feedback techniques for group-common PDCCH transmissions

Patent metadata

Field	Value
Publication number	US-11540266-B2
Application number	US-202117146328-A
Country	US
Kind code	B2
Filing date	Jan 11, 2021
Priority date	Jan 14, 2020
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A user equipment (UE) may receive a first group downlink control information transmission associated with a UE group, where the first group downlink control information transmission may reference a second group downlink control information transmission (e.g., according to a pre-notification indication). The UE may determine a feedback condition for the second group downlink control information transmission and monitor for the second group downlink control information transmission. Alternatively, the UE may receive a second group downlink control information transmission referencing the first group downlink control information transmission (e.g., according to a post-confirmation indication), and the UE may determine a feedback condition for the first group downlink control information transmission. Based on the feedback condition, the UE may transmit feedback information, for example, indicating that the UE did not correctly receive the indicated group downlink control information transmission.

First claim

What is claimed is:

1. A method for wireless communication at a user equipment (UE), comprising:
receiving a first group downlink control information transmission associated with a UE group, the first group downlink control information transmission referencing a second group downlink control information transmission;
determining a feedback condition for the second group downlink control information transmission based at least in part on the first group downlink control information transmission;
monitoring for the second group downlink control information transmission based at least in part on the first group downlink control information transmission; and
transmitting feedback information for the second group downlink control information transmission based at least in part on the monitoring and the determined feedback condition.

2. The method of claim 1 , further comprising:
determining, based at least in part on the monitoring, that the second group downlink control information transmission was not received, wherein the feedback information comprises a negative acknowledgement.

3. The method of claim 2 , wherein receiving the first group downlink control information transmission comprises:
monitoring a first search space set for the first group downlink control information transmission.

4. The method of claim 2 , wherein the first group downlink control information transmission, the second group downlink control information transmission, or both, comprise a monitoring group indication.

5. The method of claim 4 , further comprising:
switching to a second search space set for monitoring by the UE based at least in part on the monitoring group indication.

6. The method of claim 2 , further comprising:
receiving a retransmission of at least a portion of the second group downlink control information transmission based at least in part on transmitting the feedback information.

7. The method of claim 1 , wherein the first group downlink control information transmission comprises a different downlink control information format than the second group downlink control information transmission.

8. The method of claim 1 , wherein the first group downlink control information transmission references a previous group downlink control information transmission, the method further comprising:
determining a feedback condition for the previous group downlink control information transmission based at least in part on the first group downlink control information transmission.

9. The method of claim 1 , wherein the first group downlink control information transmission references the second group downlink control information transmission using a pre-notification indication.

10. The method of claim 9 , wherein the pre-notification indication comprises a single bit indication.

11. The method of claim 1 , wherein the first group downlink control information transmission indicates a set of resources for transmitting the feedback information.

12. The method of claim 1 , wherein the second group downlink control information transmission is in an immediately subsequent control channel opportunity to the first group downlink control information transmission.

13. A method for wireless communication at a user equipment (UE), comprising:
monitoring for a first group downlink control information transmission associated with a UE group;
receiving a second group downlink control information transmission referencing the first group downlink control information transmission;
determining a feedback condition for the first group downlink control information transmission based at least in part on the second group downlink control information transmission; and
transmitting feedback information for the first group downlink control information transmission based at least in part on the monitoring and the determined feedback condition.

14. The method of claim 13 , further comprising:
determining, based at least in part on the monitoring, that the first group downlink control information transmission was not received, wherein the feedback information comprises a negative acknowledgement.

15. The method of claim 14 , wherein receiving the second group downlink control information transmission comprises:
monitoring a first search space set for the second group downlink control information transmission.

16. The method of claim 14 , wherein the first group downlink control information transmission, the second group downlink control information transmission, or both, comprise a monitoring group indication.

17. The method of claim 16 , further comprising:
switching to a second search space set for monitoring by the UE based at least in part on the monitoring group indication.

18. The method of claim 14 , further comprising:
receiving a retransmission of at least a portion of the first group downlink control information transmission based at least in part on transmitting the feedback information.

19. The method of claim 13 , wherein the first group downlink control information transmission comprises a different downlink control information format than the second group downlink control information transmission.

20. The method of claim 13 , wherein the first group downlink control information transmission references a third group downlink control information transmission, the method further comprising:
determining a feedback condition for the third group downlink control information transmission based at least in part on the first group downlink control information transmission.

21. The method of claim 13 , wherein the second group downlink control information transmission references the first group downlink control information transmission using a post-confirmation indication.

22. The method of claim 21 , wherein the post-confirmation indication comprises a single bit indication.

23. The method of claim 13 , wherein the second group downlink control information transmission indicates a set of resources for transmitting the feedback information.

24. The method of claim 13 , wherein the first group downlink control information transmission is in a control channel opportunity immediately preceding the second group downlink control information transmission.

25. An apparatus for wireless communication at a user equipment (UE), comprising:
a processor,
memory coupled with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
receive a first group downlink control information transmission associated with a UE group, the first group downlink control information transmission referencing a second group downlink control information transmission;
determine a feedback condition for the second group downlink control information transmission based at least in part on the first group downlink control information transmission;
monitor for the second group downlink control information transmission based at least in part on the first group downlink control information transmission; and
transmit feedback information for the second group downlink control information transmission based at least in part on the monitoring and the determined feedback condition.

26. The apparatus of claim 25 , wherein the instructions are further executable by the processor to cause the apparatus to:
determine, based at least in part on the monitoring, that the second group downlink control informat

Assignees

• Qualcomm Inc

Inventors

• Nam Wooseok
• Luo Tao
• Ang Peter Pui Lok
• He Linhai
• Damnjanovic Jelena

Classifications

• H04L1/1867

  Arrangements specially adapted for the transmitter end · CPC title

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L1/1685 Primary

  the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal · CPC title

• H04L1/1812

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• H04W72/042 Primary

  Electricity · mapped topic