Wireless communication method, user equipment, and base station

Patent metadata

Field	Value
Publication number	US-2024089965-A1
Application number	US-202318505099-A
Country	US
Kind code	A1
Filing date	Nov 8, 2023
Priority date	May 10, 2021
Publication date	Mar 14, 2024
Grant date	—

Abstract

A wireless communication method, a user equipment (UE), and a base station are provided. The wireless communication method includes being configured, by a base station, with a first information for a serving cell and determining one or more slots associated with a physical downlink shared channel (PDSCH) based on the first information, wherein the first information comprises at least one of a physical uplink control channel (PUCCH) slot, M K1 candidate values, or a time-domain resource assignment (TDRA) table, where M and K1 are integers.

First claim

What is claimed is:

1 . A wireless communication method by a user equipment (UE), comprising:
being configured, by a base station, with a first information for a serving cell; and determining one or more slots associated with a physical downlink shared channel (PDSCH) based on the first information, wherein the first information comprises at least one of a physical uplink control channel (PUCCH) slot, M K1 candidate values, or a time-domain resource assignment (TDRA) table, where M and K1 are integers.

2 . The method of claim 1 , wherein the UE determines a type 1 codebook size by determining the one or more slots associated with the PDSCH based on the first information.

3 . The method of claim 1 , wherein the one or more slots are used for a candidate PDSCH reception, a semi-persistent scheduling (SPS) PDSCH release, or an SPS PDSCH reception.

4 . The method of claim 3 , wherein a value of K1 is used to determine a last slot for the candidate PDSCH reception, the SPS PDSCH release, or the SPS PDSCH reception.

5 . The method of claim 4 , wherein the last slot for the candidate PDSCH reception, the SPS PDSCH release, or the SPS PDSCH reception is determined by a downlink (DL) slot of a DL bandwidth part (BWP) that is an uplink (UL) slot n-K1 of an UL BWP, and the UL slot n is an initial UL slot, wherein the DL BWP and the UL BWP have a same subcarrier spacing (SCS).

6 . The method of claim 4 , wherein the last slot for the candidate PDSCH reception, the SPS PDSCH release, or the SPS PDSCH reception is determined by a downlink (DL) slot of a DL bandwidth part (BWP) that is overlapped with an uplink (UL) slot n-K1 of an UL BWP, and the UL slot n is an initial UL slot, wherein the DL BWP and the UL BWP have a different subcarrier spacing (SCS).

7 . The method of claim 1 , wherein the UE uses the TDRA table to expand DL slots for the candidate PDSCH reception, the SPS PDSCH release, or the SPS PDSCH reception according to the PUCCH slot.

8 . The method of claim 1 , wherein the UE determines one or more initial DL slots from the PUCCH slot and one or more K1 values.

9 . The method of claim 1 , wherein the UE expands a DL slot by a maximum number (L) of a PDSCH scheduled by a downlink control information (DCI).

10 . The method of claim 1 , wherein a value of L can be derived from the TDRA table, the TDRA table contains N rows, and each row contains one or more start and length indicator value (SLIV) values, where N in an integer.

11 . The method of claim 10 , wherein a greatest number of SLIV values among N rows is a value of L, determined DL slots for the candidate PDSCH reception, the SPS PDSCH release, or the SPS PDSCH reception according to the PUCCH slot are a union of the expanded DL slots, and the method further comprises determining whether the expanded DL slots are valid.

12 . The method of claim 1 , wherein the UE is configured with serving cells, the UE determines DL slots for each serving cell, and determined DL slots are a union between the serving cells, the type 1 codebook size for each serving cell is equal to a determined number of DL slots, and the determined DL slots are consecutive non-uplink slots.

13 . The method of claim 10 , wherein the UE checks the one or more SLIV values in the determined DL slot to determine the type 1 codebook size, and the one or more SLIV values determine a starting symbol of the PDSCH and a length of the PDSCH that can be scheduled within the determined DL slot.

14 . The method of claim 10 , wherein:
if there is only one SLIV value used to schedule the PDSCH in the DL slot, the UE does not need to check the SLIV value and reserves 1 bit in the type 1 codebook for the DL slot; if PDSCH transmissions derived from SLIV values are overlapped in one slot, the UE reserves 1 bit in the type 1 codebook for the DL slot; or if the PDSCH is not to be scheduled in the DL slot, the UE uses a negative acknowledgment (NACK) bit to reserve a bit position in the type 1 codebook.

15 . The method of claim 1 , wherein the UE determines the type 1 codebook size depends on a number of K1 values, a maximum of number of PDSCHs to be scheduled by a DCI, and/or a maximum number of coding block groups (CBG) for a transport block.

16 . The method of claim 15 , wherein the type 1 codebook size is equal to a number of DL slots times a maximum number of PDSCHs scheduled by the DCI.

17 . The method of claim 15 , wherein for a given serving cell and for each determined DL slot, a reserved number of bits is equal to a maximum between a maximum number of PDSCHs scheduled by the DCI and a configured maximum number of CBGs, wherein when one PDSCH scheduled by the DCI falls in the determined DL slot, the UE reports a same HARQ-ACK information of a PDSCH reception repeatedly in the reserved number of bits of the determined DL slot.

18 . A wireless communication method by a base station, comprising:
configuring, to a user equipment (UE), a first information for a serving cell; and controlling the UE to determine one or more slots associated with a physical downlink shared channel (PDSCH) based on the first information, wherein the first information comprises at least one of a physical uplink control channel (PUCCH) slot, M K1 candidate values, or a time-domain resource assignment (TDRA) table, where M and K1 are integers.

19 . A user equipment (UE), comprising:
a memory; a transceiver; and a processor coupled to the memory and the transceiver; wherein the processor is configured to:
be configured, by a base station, with a first information for a serving cell; and
determine one or more slots associated with a physical downlink shared channel (PDSCH) based on the first information, wherein the first information comprises at least one of a physical uplink control channel (PUCCH) slot, M K1 candidate values, or a time-domain resource assignment (TDRA) table, where M and K1 are integers.

20 . A base station, comprising:
a memory; a transceiver; and a processor coupled to the memory and the transceiver; wherein the processor is configured to perform the method of claim 18 .

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Lin Hao

Classifications

• H04W72/1273 Primary

  of downlink data flows · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04W72/11

  Semi-persistent scheduling · CPC title

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04L1/1854 Primary

  Scheduling and prioritising arrangements · CPC title