Aperiodic zero power channel state information reference signal enhancement for multi-slot PDSCH rate matching

Patent metadata

Field	Value
Publication number	US-12463776-B2
Application number	US-202217936797-A
Country	US
Kind code	B2
Filing date	Sep 29, 2022
Priority date	Sep 29, 2022
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

Aspects of the present disclosure allow for more efficient rate matching by allowing a triggered A-ZP-CSI-RS set to support rate matching around multiple slots. Aspects of the present disclosure may allow a triggered A-ZP CSI-RS set to be applied to less than all scheduled PDSCH slots when DCI schedules PDSCH on multiple slots. Aspects of the present disclosure may extend CSI-RS resource mapping to span multiple adjacent slots. In another instance, aspects of the present disclosure allow a resource mapping configuration to indicate an initial symbol of a plurality of symbols spanning the plurality of slots for a respective A-ZP-CSI-RS resource. Doing so also allows a PDSCH transmission in a slot among the plurality of slots using a rate matching pattern associated with a set of A-ZP-CSI-RE resources to be received. In addition, aspects of the present disclosure can also add periodicity to A-ZP-CSI-RS resource set configuration.

First claim

What is claimed is:

1 . An apparatus for wireless communication at a user equipment (UE), comprising:
a memory; and at least one processor coupled to the memory and configured to: receive, in an initial slot among a plurality of slots, downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) over the plurality of slots, wherein the DCI triggers a set of aperiodic zero power channel state information reference signal (A-ZP-CSI-RS) resources; receive a resource mapping configuration associated with the set of A-ZP-CSI-RS resources, wherein the resource mapping configuration indicates a slot periodicity and an initial symbol of a plurality of symbols spanning the plurality of slots for a respective A-ZP-CSI-RS resource in the set of A-ZP-CSI-RS resources; and receive a PDSCH transmission in a slot of the plurality of slots using a rate matching pattern associated with the set of A-ZP-CSI-RS resources, wherein the rate matching pattern is based at least in part on the resource mapping configuration and the slot periodicity with respect to a slot offset value and a number of slot repetitions.

2 . The apparatus of claim 1 , wherein the DCI indicates a slot offset value, wherein the slot of the plurality of slots is based on the slot offset value.

3 . The apparatus of claim 1 , wherein the slot periodicity is configured from the set of A-ZP-CSI-RS resources.

4 . The apparatus of claim 1 , wherein the DCI indicates the number of slot repetitions.

5 . The apparatus of claim 4 , wherein the number of slot repetitions is based on a DCI indication and a radio resource control (RRC) configuration.

6 . The apparatus of claim 5 , wherein the number of slot repetitions is indicated by a length of a field in the DCI according to a number of a RRC-configured candidate values.

7 . The apparatus of claim 2 , wherein the slot offset value is based on a DCI indication and a RRC configuration.

8 . The apparatus of claim 7 , wherein the slot offset value is indicated by a length of field in the DCI according to a number of RRC-configured candidate values.

9 . A method for wireless communication by a user equipment (UE), comprising:
receiving, in an initial slot among a plurality of slots, downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) over the plurality of slots, wherein the DCI triggers a set of aperiodic zero power channel state information reference signal (A-ZP-CSI-RS) resources; receiving a resource mapping configuration associated with the set of A-ZP-CSI-RS resources, wherein the resource mapping configuration indicates a slot periodicity and an initial symbol of a plurality of symbols spanning the plurality of slots for a respective A-ZP-CSI-RS resource in the set of A-ZP-CSI-RS resources; and receiving a PDSCH transmission in a slot of the plurality of slots using a rate matching pattern associated with the set of A-ZP-CSI-RS resources, wherein the rate matching pattern is based at least in part on the resource mapping configuration and the slot periodicity with respect to a slot offset value and a number of slot repetitions.

10 . The method of claim 9 , wherein the DCI indicates a slot offset value, wherein the slot of the plurality of slots is based on the slot offset value.

11 . The method of claim 9 , wherein the slot periodicity is configured from the set of A-ZP-CSI-RS resources.

12 . The method of claim 9 , wherein the DCI indicates the number of slot repetitions.

13 . The method of claim 12 , wherein the number of slot repetitions is based on a DCI indication and a radio resource control (RRC) configuration.

14 . The method of claim 13 , wherein the number of slot repetitions is indicated by a length of a field in the DCI according to a number of RRC-configured candidate values.

15 . The method of claim 10 , wherein the slot offset value is based on a DCI indication and a RRC configuration.

16 . The method of claim 15 , wherein the slot offset value is indicated by a length of a field of the DCI according to a number of RRC-configured candidate values.

17 . An apparatus for wireless communication at a network device, comprising:
a memory; and at least one processor coupled to the memory and configured to: transmit, in an initial slot among a plurality of slots, downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) over the plurality of slots, wherein the DCI triggers a set of aperiodic zero power channel state information reference signal (A-ZP-CSI-RS) resources; transmit a resource mapping configuration associated with the set of A-ZP-CSI-RS resources, wherein the resource mapping configuration indicates a slot periodicity and an initial symbol of a plurality of symbols spanning the plurality of slots for a respective A-ZP-CSI-RS resource in the set of A-ZP-CSI-RS resources; and transmit a PDSCH transmission in a slot of the plurality of slots using a rate matching pattern associated with the set of A-ZP-CSI-RS resources, wherein the rate matching pattern is based at least in part on the resource mapping configuration and the slot periodicity with respect to a slot offset value and a number of slot repetitions.

18 . The apparatus of claim 17 , wherein the DCI indicates a slot offset value, wherein the slot of the plurality of slots is based on the slot offset value.

19 . The apparatus of claim 17 , wherein the slot periodicity is configured from the set of A-ZP-CSI-RS resources.

20 . The apparatus of claim 17 , wherein the DCI indicates the number of slot repetitions.

21 . The apparatus of claim 20 , wherein the number of slot repetitions is based on a DCI indication and a radio resource control (RRC) configuration.

22 . The apparatus of claim 21 , wherein the number of slot repetitions is indicated by a length of a field in the DCI indication according to a number of a RRC-configured candidate values.

23 . The apparatus of claim 18 , wherein the slot offset value is based on a DCI indication and a RRC configuration.

24 . The apparatus of claim 23 , wherein the slot offset value is indicated by a length of field in the DCI according to a number of RRC-configured candidate values.

25 . A method for wireless communication by a network device, comprising:
transmitting, in an initial slot among a plurality of slots, downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) over the plurality of slots, wherein the DCI triggers a set of aperiodic zero power channel state information reference signal (A-ZP-CSI-RS) resources; transmitting a resource mapping configuration associated with the set of A-ZP-CSI-RS resources, wherein the resource mapping configuration indicates a slot periodicity and an initial symbol of a plurality of symbols spanning the plurality of slots for a respective A-ZP-CSI-RS resource in the set of A-ZP-CSI-RS resources; and transmitting a PDSCH transmission in a slot of the plurality of slots using a rate matching pattern associated with the set of A-ZP-CSI-RS resources, wherein the rate matching pattern is based at least in part on the resource mapping configuration and the slot periodicity with respect to a slot offset value and a number of slot repetitions.

26 . The method of claim 25 , wherein the DCI indicates a slot offset value, wherein the slot of the plurality of slots in which the

Assignees

• Qualcomm Inc

Inventors

• Ryu Jae Ho
• Takeda Kazuki
• Kim Hobin
• Sankar Hari

Classifications

• H04L1/0067

  Rate matching (H04L1/0013 and H04L1/08 take precedence) · CPC title

• H04W72/23

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

• H04L5/0094

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

• H04L5/0044

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title

• H04L5/0051 Primary

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title