Dci design for multi-cross carrier scheduling

Patent metadata

Field	Value
Publication number	US-2021321400-A1
Application number	US-202117224011-A
Country	US
Kind code	A1
Filing date	Apr 6, 2021
Priority date	Apr 10, 2020
Publication date	Oct 14, 2021
Grant date	—

Abstract

A configuration to enable a base station to schedule cross carrier scheduling of uplink and/or downlink transmissions using a DCI. The apparatus transmits, to a UE, a PDCCH including a cross carrier schedule. The PDCCH comprises DCI configured to schedule an uplink transmission or a downlink transmission. The DCI includes at least one FDRA field indicating RBs for the uplink transmission or the downlink transmission. The apparatus communicates with the UE based on the cross carrier schedule configured by the DCI.

First claim

What is claimed is:

1 . A method of wireless communication at a base station, comprising:
transmitting, to a user equipment (UE), a physical downlink control channel (PDCCH) including a cross carrier schedule, the PDCCH comprising downlink control information (DCI) configured to schedule an uplink transmission or a downlink transmission, the DCI including at least one frequency domain resource allocation (FDRA) field indicating resource blocks (RBs) for the uplink transmission or the downlink transmission on more than one cell; and communicating with the UE based on the cross carrier schedule configured by the DCI.

2 . The method of claim 1 , wherein the more than one cell comprises a secondary cell (SCell), and wherein the configuring the PDCCH comprises:
scheduling a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH) for a primary secondary cell (PSCell) using the DCI of the PDCCH of the SCell.

3 . The method of claim 1 , wherein the more than one cell comprises a primary secondary cell (PSCell) or a secondary cell (SCell), and wherein the configuring the PDCCH comprises:
scheduling a physical downlink shared channel (PDSCH) on multiple cells using the DCI of the PDCCH of the PSCell, or scheduling the PDSCH on multiple cells using the DCI of the PDCCH of the SCell.

4 . The method of claim 1 , further comprising:
configuring the PDCCH including the cross carrier schedule of the uplink transmission or the downlink transmission on the more than one cell.

5 . The method of claim 1 , wherein the DCI includes separate FDRA fields for the cross carrier schedule.

6 . The method of claim 5 , wherein the DCI includes at least one FDRA field for a serving cell and at least one FDRA field for another serving cell.

7 . The method of claim 5 , wherein the DCI includes two bits for the cross carrier schedule.

8 . The method of claim 7 , wherein a first bit is a virtual resource block to physical resource block (VRB-to-PRB) mapping field for a first carrier, and a second bit is a VRB-to-PRB mapping field for a second carrier.

9 . The method of claim 1 , wherein the DCI includes joint FDRA fields that are shared between a serving cell and another serving cell.

10 . The method of claim 9 , wherein the joint FDRA fields comprise a virtual resource block to physical resource block (VRB-to-PRB) mapping field.

11 . The method of claim 10 , wherein a value of the at least one FDRA field is linked by a set of resource blocks (RBs) where scheduled physical downlink shared channels (PDSCHs) are on multiple carriers, where the set of RBs on the multiple carriers is configured by radio resource control (RRC) signaling.

12 . The method of claim 10 , wherein the VRB-to-PRB mapping field is present if at least one component carrier of the serving cell or the another serving cell is configured with resource allocation (RA) type 1 and with interleaved VRB-to-PRB.

13 . An apparatus for wireless communication at a base station, comprising:
a memory; a transceiver; and at least one processor coupled to the memory and configured to:
transmit, to a user equipment (UE) via the transceiver, a physical downlink control channel (PDCCH) including a cross carrier schedule, the PDCCH comprising downlink control information (DCI) configured to schedule an uplink transmission or a downlink transmission, the DCI including at least one frequency domain resource allocation (FDRA) field indicating resource blocks (RBs) for the uplink transmission or the downlink transmission; and
communicate with the UE, via the transceiver, based on the cross carrier schedule configured by the DCI.

14 . A method of wireless communication at a user equipment (UE), comprising:
receiving, from a base station, a physical downlink control channel (PDCCH) including a cross carrier schedule, the PDCCH comprising downlink control information (DCI) configured to schedule an uplink transmission or a downlink transmission, the DCI including at least one frequency domain resource allocation (FDRA) field indicating resource blocks (RBs) for the uplink transmission or the downlink transmission; and communicating with the base station based on the cross carrier schedule configured by the DCI.

15 . The method of claim 14 , wherein the PDCCH of a secondary cell (SCell) schedules a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH) for a primary secondary cell (PSCell).

16 . The method of claim 14 , wherein
the PDCCH of a primary secondary cell (PSCell) schedules a physical downlink shared channel (PDSCH) on multiple cells using the DCI, or the PDCCH of a secondary cell (SCell) schedules the PDSCH on multiple cells using the DCI.

17 . The method of claim 14 , wherein the DCI includes separate FDRA fields for the cross carrier schedule.

18 . The method of claim 17 , wherein the DCI includes at least one FDRA field for a serving cell and at least one FDRA field for another serving cell.

19 . The method of claim 17 , wherein the DCI includes two bits for the cross carrier schedule.

20 . The method of claim 19 , wherein a first bit is a virtual resource block to physical resource block (VRB-to-PRB) mapping field for a first carrier, and a second bit is a VRB-to-PRB mapping field for a second carrier.

21 . The method of claim 14 , wherein the DCI includes joint FDRA fields that are shared between a serving cell and another serving cell.

22 . The method of claim 21 , wherein the joint FDRA fields comprise a virtual resource block to physical resource block (VRB-to-PRB) mapping field.

23 . The method of claim 22 , wherein a value of the at least one FDRA field is linked by a set of resource blocks (RBs) where scheduled physical downlink shared channels (PDSCHs) are on multiple carriers, where the set of RBs on the multiple carriers is configured by radio resource control (RRC) signaling.

24 . The method of claim 22 , wherein the VRB-to-PRB mapping field is present if at least one component carrier of the serving cell or the another serving cell is configured with resource allocation (RA) type 1 and with interleaved VRB-to-PRB.

25 . An apparatus for wireless communication at a user equipment (UE), comprising:
a memory; a transceiver; and at least one processor coupled to the memory and configured to:
receive, from a base station via the transceiver, a physical downlink control channel (PDCCH) including a cross carrier schedule, the PDCCH comprising downlink control information (DCI) configured to schedule an uplink transmission or a downlink transmission, the DCI including at least one frequency domain resource allocation (FDRA) field indicating resource blocks (RBs) for the uplink transmission or the downlink transmission; and
communicate with the base station, via the transceiver, based on the cross carrier schedule configured by the DCI.

26 . The apparatus of claim 25 , wherein the PDCCH of a secondary cell (SCell) schedules a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH) for a primary secondary cell (PSCell).

27 . The apparatus of claim 25 , wherein
the PDCCH of a primary secondary cell (PSCell) schedules a physical downlink shared channel (PDSCH) on multiple cells using the DCI, or the PDCCH of a secondary cell (SCell) schedules the PDSCH on multiple cells using the DCI.

Assignees

• Qualcomm Inc

Inventors

• Takeda Kazuki
• Chen Wanshi
• Gaal Peter
• Zhang Xiaoxia
• Xu Huilin
• Khoshnevisan Mostafa
• Luo Tao
• Rico Alvarino Alberto

Classifications

• H04W72/23

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

• H04L5/001 Primary

  the frequencies being arranged in component carriers · CPC title

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title

• H04W72/1273

  of downlink data flows · CPC title

• H04L5/0053

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