Hybrid automatic repeat request (HARQ) feedback for multiple physical downlink shared channel (PDSCH) with downlink (DL) semi-persistent scheduling

Patent metadata

Field	Value
Publication number	US-12207240-B2
Application number	US-202017607789-A
Country	US
Kind code	B2
Filing date	Apr 30, 2020
Priority date	May 2, 2019
Publication date	Jan 21, 2025
Grant date	Jan 21, 2025

Abstract

A method and apparatus are disclosed for downlink semi-persistent scheduling configuration. In one embodiment, a method for a wireless device (WD) includes receiving at least one downlink, DL, semi-persistent scheduling, SPS, configuration; using at least one HARQ timing offset value out of a plurality of HARQ timing offset values corresponding to the at least one DL SPS configuration to determine an uplink, UL, slot to send HARQ feedback for a plurality of physical downlink shared channel, PDSCH, transmissions, the plurality of PDSCH transmissions being associated with the at least one DL SPS configuration; and optionally, sending the HARQ feedback based at least in part on the at least one HARQ timing offset value. In one embodiment, a method for a network node includes sending at least one downlink, DL, semi-persistent scheduling, SPS, configuration.

First claim

What is claimed is:

1. A method implemented in a wireless device, WD, the method comprising:
receiving at least one downlink, DL, semi-persistent scheduling, SPS, configuration;
using at least one HARQ timing offset value out of a plurality of HARQ timing offset values corresponding to the at least one DL SPS configuration to determine an uplink, UL, slot to send HARQ feedback for a plurality of physical downlink shared channel, PDSCH, transmissions, the plurality of PDSCH transmissions being associated with the at least one DL SPS configuration; and
optionally, sending the HARQ feedback based at least in part on the at least one HARQ timing offset value.

2. The method of claim 1 , wherein a periodicity of at least one of the at least one DL SPS configuration is at least one of:
two or more orthogonal frequency division multiplexing, OFDM, symbols; and
less than 10 milliseconds.

3. The method of claim 1 , wherein the HARQ feedback is for the plurality of PDSCH transmissions within a single slot.

4. The method of claim 1 , wherein the at least one DL SPS configuration comprises:
a plurality of DL SPS configurations, each of the plurality of DL SPS configurations corresponding to a different HARQ timing offset value.

5. The method of claim 1 , wherein the at least one DL SPS configuration comprises:
a plurality of sub-sets of DL SPS transmission opportunities, each of the plurality of sub-sets of DL SPS transmission opportunities corresponding to a different HARQ timing offset value.

6. The method of claim 1 , wherein the at least one DL SPS configuration comprises:
a plurality of bitmaps, each of the plurality of bitmaps associated with a different HARQ timing offset value.

7. The method of claim 1 , wherein using the at least one HARQ timing offset value comprises:
determining the at least one HARQ timing offset value based at least in part on a HARQ timing offset value for a last PDSCH within a PDSCH window.

8. The method of claim 7 , wherein using the at least one HARQ timing offset value further comprises:
disregarding at least one HARQ timing offset value for at least one earlier PDSCH within the PDSCH window.

9. The method of claim 1 , wherein using the at least one HARQ timing offset value comprises:
determining whether the at least one HARQ timing offset value indicates a DL slot and if the at least one HARQ timing offset value indicates the DL slot, postponing sending the HARQ feedback until a first slot with an UL allocation.

10. The method of claim 1 , wherein the at least one HARQ timing offset value is indicated via one of radio resource control, RRC, signaling and at least one downlink control information, DCI, message.

11. A method implemented in a network node configured to communicate with a wireless device, WD, the method comprising:
sending at least one downlink, DL, semi-persistent scheduling, SPS, configuration;
optionally, sending a plurality of physical downlink shared channel, PDSCH, transmissions associated with the at least one DL SPS configuration;
determining at least one HARQ timing offset value out of a plurality of HARQ timing offset values corresponding to the at least one DL SPS configuration; and
receiving HARQ feedback for the plurality of PDSCH transmissions based at least in part on the at least one HARQ timing offset value.

12. The method of claim 11 , wherein a periodicity of at least one of the at least one DL SPS configuration is at least one of:
two or more orthogonal frequency division multiplexing, OFDM, symbols; and
less than 10 milliseconds.

13. The method of claim 11 , wherein the HARQ feedback is for the plurality of PDSCH transmissions within a single slot.

14. The method of claim 11 , wherein the at least one DL SPS configuration comprises:
a plurality of DL SPS configurations, each of the plurality of DL SPS configurations corresponding to a different HARQ timing offset value.

15. The method of claim 11 , wherein the at least one DL SPS configuration comprises:
a plurality of sub-sets of DL SPS transmission opportunities, each of the plurality of sub-sets of DL SPS transmission opportunities corresponding to a different HARQ timing offset value.

16. The method of claim 11 , wherein the at least one DL SPS configuration comprises:
a plurality of bitmaps, each of the plurality of bitmaps associated with a different HARQ timing offset value.

17. The method of claim 11 , wherein determining the at least one HARQ timing offset value comprises:
determining the at least one HARQ timing offset value based at least in part on a HARQ timing offset value for a last PDSCH within a PDSCH window.

18. The method of claim 17 , wherein determining the at least one HARQ timing offset value further comprises:
determining the at least one HARQ timing offset value based at least in part on at least one HARQ timing offset value for at least one earlier PDSCH within the PDSCH window being disregarded.

19. The method of claim 11 , wherein receiving HARQ feedback further comprises:
determining whether the at least one HARQ timing offset value indicates a DL slot and if the at least one HARQ timing offset value indicates the DL slot, postponing receiving the HARQ feedback until a first slot with an UL allocation.

20. The method of claim 11 , further comprising:
indicating the at least one HARQ timing offset value via one of radio resource control (RRC) signaling and at least one downlink control information, DCI, message.

21. A wireless device, WD, configured to communicate with a network node, the WD comprising processing circuitry, the processing circuitry configured to cause the WD to:
receive at least one downlink, DL, semi-persistent scheduling, SPS, configuration;
use at least one HARQ timing offset value out of a plurality of HARQ timing offset values corresponding to the at least one DL SPS configuration to determine an uplink, UL, slot to send HARQ feedback for a plurality of physical downlink shared channel, PDSCH, transmissions, the plurality of PDSCH transmissions being associated with the at least one DL SPS configuration; and
optionally, send the HARQ feedback based at least in part on the at least one HARQ timing offset value.

22. The WD of claim 21 , wherein a periodicity of at least one of the at least one DL SPS configuration is at least one of:
two or more orthogonal frequency division multiplexing, OFDM, symbols; and
less than 10 milliseconds.

23. The WD of claim 21 , wherein the HARQ feedback is for the plurality of PDSCH transmissions within a single slot.

24. The WD of claim 21 , wherein the at least one DL SPS configuration comprises:
a plurality of DL SPS configurations, each of the plurality of DL SPS configurations corresponding to a different HARQ timing offset value.

25. The WD of claim 21 , wherein the at least one DL SPS configuration comprises:
a plurality of sub-sets of DL SPS transmission opportunities, each of the plurality of sub-sets of DL SPS transmission opportunities corresponding to a different HARQ timing offset value.

26. A network node configured to communicate with a wireless device, WD, the network node comprising processing circuitry, the processing circuitry configured to cause the network node to:
send at least one downlink, DL, semi-persistent scheduling, SPS, configuration;
optionally, send a plurality of physical downlink shared channel, PDSCH, transmissions assoc

Assignees

• Ericsson Telefon Ab L M

Inventors

• Behravan Ali
• Falahati Sorour
• Baldemair Robert

Classifications

• H04L1/1854 Primary

  Scheduling and prioritising arrangements · CPC title

• H04L1/1812

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

• H04L5/0082

  at predetermined intervals · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04W72/11

  Semi-persistent scheduling · CPC title