Method and apparatus for codebook group-based operation with multiple-physical downlink shared channel scheduling

Patent metadata

Field	Value
Publication number	US-2024215047-A1
Application number	US-202117911128-A
Country	US
Kind code	A1
Filing date	Sep 24, 2021
Priority date	Sep 24, 2021
Publication date	Jun 27, 2024
Grant date	—

Abstract

Provided is a method for a user equipment (UE). The method comprises acquiring a downlink control information (DCI) configured for multiple-physical downlink shared channel (PDSCH) scheduling; determining, based on the number of PDSCHs scheduled by the DCI, whether a codebook group (CBG)-based operation is enabled for the scheduled PDSCHs; and determining, based on the number of PDSCHs scheduled by the DCI, a format of the DCI.

First claim

1 .- 39 . (canceled)

40 . One or more non-transitory, computer-readable media having instructions that, when executed, cause a user equipment (UE) to:
acquire downlink control information (DCI) to schedule a number of physical downlink shared channel (PDSCH) transmissions, the number being greater than one; determine, based on the number of PDSCH transmissions scheduled by the DCI, whether a codebook group (CBG)-based operation is enabled for the number of PDSCH transmissions; and determine, based on the number of PDSCH transmissions scheduled by the DCI, a format of the DCI.

41 . The one or more non-transitory, computer-readable media of claim 40 , wherein the instructions, when executed, further cause the UE to:
interpret the format of the DCI after acquiring the DCI based on the number of the PDSCH transmissions C, wherein the number of PDSCH transmissions C is indicated by a time domain resource allocation (TDRA) field in the DCI.

42 . The one or more non-transitory, computer-readable media of claim 41 , wherein to determine whether the CBG-based operation is enabled the UE is to:
compare the number of the PDSCH transmissions C with a threshold M PDSCH,c that represents a maximum number of the PDSCH transmissions that are enabled with the CBG-based operation for a serving cell; and determine that the CBG-based operation is disabled if the number of the PDSCH transmissions C is larger than the threshold M PDSCH,c .

43 . The one or more non-transitory, computer-readable media of claim 42 , wherein to determine that the CBG-based operation is disabled if the number of the PDSCH transmissions C is larger than the threshold M PDSCH,c the UE is to:
determine a CBG transmission indicator (CBGTI) field is not present in the DCI; and determine a bitwidth for each of a new data indicator (NDI) field and a redundancy version (RV) field of the DCI.

44 . The one or more non-transitory, computer-readable media of claim 43 , wherein the bitwidth for each of the NDI field and the RV field is determined based on a maximum number of the schedulable PDSCHs for a serving cell by the TDRA field of the DCI, and wherein each bit of the NDI field and the RV field corresponds to one of the number of PDSCH transmissions.

45 . The one or more non-transitory, computer-readable media of claim 41 , wherein to determine whether the CBG-based operation is enabled the UE is to:
compare the number of the PDSCH transmissions C with a threshold M PDSCH,c that represents a maximum number of PDSCH transmissions that are enabled with the CBG-based operation for a serving cell; and determine that the CBG-based operation is enabled if the number of the PDSCH transmissions C is equal to or smaller than the threshold M PDSCH,c .

46 . The one or more non-transitory, computer-readable media of claim 45 , wherein to determine that the CBG-based operation is enabled if the number of the PDSCH transmissions C is equal to or smaller than the threshold M PDSCH,c the UE is to:
determine a CBG transmission indicator (CBGTI) field is present in the DCI; and determine a bitwidth for each of a new data indicator (NDI) field, a redundancy version (RV) field, and a CBGTI of the DCI.

47 . The one or more non-transitory, computer-readable media of claim 46 , wherein:
the bitwidth of the NDI field is equal to the threshold M PDSCH,c ; the bitwidth of the RV field is equal to the threshold M PDSCH,c multiplied by a pre-determined coefficient K that takes a value of 1 or 2; and the bit size of the CBGTI field is equal to the threshold M PDSCH,c multiplied by a maximum number of the CBGs per transport block N c , wherein every bit of the NDI field and every K bit of the RV field correspond to one of the scheduled PDSCHs with CBG-based operation being enabled, and the CBGTI field includes sub fields each corresponding to one of the scheduled PDSCHs with CBG-based operation being enabled.

48 . The one or more non-transitory, computer-readable media of claim 47 , wherein the NDI field, the RV field and the CBGTI field are concatenated with each other and zero-padding operation is applied for the concatenated fields to align the size when CBG-based operation is disabled.

49 . The one or more non-transitory, computer-readable media of claim 42 , wherein the threshold M PDSCH,c is provided by radio resource control (RRC) signaling on a per component carrier (CC) basis.

50 . The one or more non-transitory, computer-readable media of claim 42 , wherein the threshold M PDSCH,c is assumed by the UE as a value of 1.

51 . The one or more non-transitory, computer-readable media of claim 42 , wherein the threshold M PDSCH,c is determined based on a maximum number of starting length indicator values (SLIVs) that can be indicated by the TDRA field of the DCI S c divided by a maximum number of the CBGs per transport block N c .

52 . A user equipment (UE), comprising:
receive circuitry to acquire downlink control information (DCI), wherein the DCI includes a time domain resource allocation (TDRA) field and a value of TDRA field provides a row index to an allocated table containing rows with individual rows having one or more start and length indication values (SLIVs); and control circuitry, coupled with the receive circuitry, the control circuitry to:
determine, based on the acquired DCI, a sub-codebook association for hybrid automatic repeat request (HARQ) acknowledgement (HARQ-ACK) information bits; and
generate HARQ-ACK information bits based on the sub-codebook association.

53 . The UE of claim 52 , wherein to determine the sub-codebook association for the HARQ-ACK information bits the control circuitry is to generate a first sub-codebook to include HARQ-ACK bits for:
a DCI used to schedule PDSCH on a component carrier (CC) that is not configured with a codebook group (CBG)-based operation and is configured with a TDRA table in which each of the rows has a single SLIV; a DCI used to schedule PDSCH on a CC that is not configured with CBG-based operation and is configured with TDRA table in which at least one of the rows has multiple SLIVs, and a single PDSCH is scheduled by the DCI; a DCI used for semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) release; or a DCI used for secondary cell (SCell) dormancy indication without a scheduled PDSCH.

54 . The UE of claim 53 , wherein to determine the sub-codebook association for the HARQ-ACK information bits the control circuitry is to generate a second sub-codebook to include HARQ-ACK bits for:
a DCI used to scheduling PDSCH on a CC that is configured with the TDRA table in which at least one of the rows has multiple SLIVs, and multiple PDSCHs are scheduled by the DCI; or a DCI used to schedule PDSCH on a CC that is configured with CBG-based operation and is configured with the TDRA table in which at least one of the rows has multiple SLIVs or each of the rows has a single SLIV.

55 . The UE of claim 54 , wherein to generate the second sub-codebook to include the HARQ-ACK bits the control circuitry is further to:
generate a HARQ-ACK bit for a CBG if the CBG operation is enabled; and generate a HARQ-ACK bit for a transport block in a PDSCH if the CBG operation is disabled.

56 . The UE of claim 55 , wherein the control circuitry is to generate padding HARQ-ACK bits for the second sub-codebook by:
determining a first parameter N HARQ-ACK CBG/TB for the padding HARQ-ACK bits, wherein N HARQ-ACK CBG/TB =max {S max , N max }, where S max =max{S c } and N max =max {M PDSCH,c *N c }, and where S c r

Assignees

• Apple Inc

Inventors

• He Hong
• Ye Chunxuan
• Zhang Dawei
• Sun Haitong
• Niu Huaning
• Oteri Oghenekome
• Fakoorian Seyed Ali Akbar
• Ye Sigen
• Zeng Wei
• Zhang Yushu

Classifications

• H04W72/0446

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

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L1/1854

  Scheduling and prioritising arrangements · CPC title

• H04L1/1861

  Physical mapping arrangements (for ACK signaling see also H04L5/0053) · CPC title

• H04L1/1819

  with retransmission of additional or different redundancy · CPC title