Zero power (ZP) channel state information reference signal (CSI-RS) rate matching with slot aggregation

Patent metadata

Field	Value
Publication number	US-11063692-B2
Application number	US-201916531806-A
Country	US
Kind code	B2
Filing date	Aug 5, 2019
Priority date	Aug 13, 2018
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

Techniques and apparatus for rate matching physical downlink shared channel (PDSCH) around zero power (ZP) channel state information reference signal (CSI-RS) resources in slot aggregation scenarios are described. In one technique, an indication that triggers a set of ZP CSI-RS resources is received in a first slot of a plurality of aggregated slots. A rate matching behavior for processing a PDSCH transmission received in the first slot and at least a second slot, subsequent to the first slot, of the plurality of aggregated slots is determined. The PDSCH transmission received in the first slot and at least the second slot is processed in accordance with the rate matching behavior.

First claim

What is claimed is:

1. A method for wireless communication by a user equipment (UE), comprising:
receiving, in a first slot of a plurality of aggregated slots, a first indication in downlink control information (DCI) that triggers a set of zero power (ZP) channel state information reference signal (CSI-RS) resources from multiple sets of ZP CSI-RS resources;
determining, based at least in part on the first indication received in the first slot of the plurality of aggregated slots, a rate matching behavior for processing a physical downlink shared channel (PDSCH) transmission received in the first slot and at least a second slot, subsequent to the first slot, of the plurality of aggregated slots, wherein determining the rate matching behavior comprises determining that the triggered set of ZP CSI-RS resources in the first slot is associated with each slot of the plurality of aggregated slots, including the first slot and the second slot; and
processing the PDSCH transmission received in the first slot and at least the second slot in accordance with the rate matching behavior.

2. The method of claim 1 , wherein determining the rate matching behavior further comprises determining to perform rate matching around the triggered set of ZP CSI-RS resources in each slot of the plurality of aggregated slots, including the first slot and the second slot.

3. The method of claim 1 , further comprising receiving a second indication of at least one of a set of non-zero power (NZP) CSI-RS resources or a set of tracking reference signal (TRS) resources in at least one of the plurality of aggregated slots, wherein at least one of the set of NZP CSI-RS resources or the set of TRS resources overlaps the triggered set of ZP CSI-RS resources.

4. The method of claim 1 , further comprising receiving a second indication that triggers the rate matching behavior.

5. The method of claim 4 , wherein the second indication is received via radio resource control (RRC) signaling or via DCI signaling.

6. The method of claim 4 , wherein the second indication triggers, as the rate matching behavior, performing rate-matching around the triggered set of ZP CSI-RS resources in each slot of the plurality of aggregated slots.

7. An apparatus for wireless communications, comprising:
a receiver configured to receive, in a first slot of a plurality of aggregated slots, a first indication in downlink control information (DCI) that triggers a set of zero power (ZP) channel state information reference signal (CSI-RS) resources from multiple sets of ZP CSI-RS resources;
at least one processor configured to:
determine, based at least in part on the first indication received in the first slot of the plurality of aggregated slots, a rate matching behavior for processing a physical downlink shared channel (PDSCH) transmission received in the first slot and at least a second slot, subsequent to the first slot, of the plurality of aggregated slots, wherein determining the rate matching behavior comprises determining that the triggered set of ZP CSI-RS resources in the first slot is associated with each slot of the plurality of aggregated slots, including the first slot and the second slot; and
process the PDSCH transmission received in the first slot and at least the second slot in accordance with the rate matching behavior; and
a memory coupled to the at least one processor.

8. The apparatus of claim 7 , wherein the at least one processor is configured to determine to perform rate matching around the triggered set of ZP CSI-RS resources in each slot of the plurality of aggregated slots, including the first slot and the second slot.

9. The apparatus of claim 7 , wherein:
the receiver is further configured to receive a second indication of at least one of a set of non-zero power (NZP) CSI-RS resources or a set of tracking reference signal (TRS) resources in at least one of the plurality of aggregated slots; and
at least one of the set of NZP CSI-RS resources or the set of TRS resources overlaps the triggered set of ZP CSI-RS resources.

10. The apparatus of claim 7 , wherein the receiver is configured to receive a second indication that triggers the rate matching behavior.

11. The apparatus of claim 10 , wherein the second indication is received via radio resource control (RRC) signaling or via DCI signaling.

12. The apparatus of claim 10 , wherein the second indication triggers, as the rate matching behavior, performing rate-matching around the triggered set of ZP CSI-RS resources in each slot of the plurality of aggregated slots.

13. A method for wireless communication by a network entity, comprising:
determining a rate matching behavior for processing a physical downlink shared channel (PDSCH);
transmitting, to a user equipment (UE), a first indication via downlink control information (DCI) that triggers a set of zero power (ZP) channel state information reference signal (CSI-RS) resources from multiple sets of ZP CSI-RS resources, wherein the first indication is transmitted in a first slot of a plurality of aggregated slots; and
transmitting the PDSCH in the first slot and at least a second slot, subsequent to the first slot, of the plurality of aggregated slots, wherein the determined rate matching behavior for processing the PDSCH transmitted in the first slot and at least the second slot is based in part on the first indication transmitted in the first slot and wherein the rate matching behavior is to perform rate matching around the triggered set of ZP CSI-RS resources in each slot of the plurality of aggregated slots.

14. The method of claim 13 , further comprising transmitting a second indication triggering the UE to perform rate matching around the triggered set of ZP CSI-RS resources in each slot of the plurality of aggregated slots when processing the transmitted PDSCH.

15. The method of claim 14 , wherein the second indication is transmitted via radio resource control (RRC) signaling or DCI signaling.

16. The method of claim 13 , further comprising transmitting a second indication of at least one of a set of non-zero power (NZP) CSI-RS resources or a set of tracking reference signal (TRS) resources for at least one of the plurality of aggregated slots, wherein at least one of the set of NZP CSI-RS resources or the set of TRS resources overlaps the triggered set of ZP CSI-RS resources.

17. An apparatus for wireless communications, comprising:
at least one processor configured to determine a rate matching behavior for processing a physical downlink shared channel (PDSCH);
a transmitter configured to:
transmit, to a user equipment (UE), a first indication via downlink control information (DCI) that triggers a set of zero power (ZP) channel state information reference signal (CSI-RS) resources from multiple sets of ZP CSI-RS resources, wherein the first indication is transmitted in a first slot of a plurality of aggregated slots; and
transmit the PDSCH in the first slot and at least a second slot, subsequent to the first slot, of the plurality of aggregated slots, wherein the determined rate matching behavior for processing the PDSCH transmitted in the first slot and at least the second slot is based in part on the first indication transmitted in the first slot and wherein the rate matching behavior is to perform rate matching around the triggered set of ZP CSI-RS resources in each slot of the plurality of aggregated slots; and
a memory coupled to the at least one processor.

18. The apparatus of claim 17 , wherein the transmitter is further configured to transmit a second indication triggerin

Assignees

• Qualcomm Inc

Inventors

• Hosseini Seyedkianoush
• Manolakos Alexandros

Classifications

• H04W72/23

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

• H04L1/0067 Primary

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

• H04L5/005

  of common pilots, i.e. pilots destined for multiple users or terminals · CPC title

• H04L1/0013 Primary

  Rate matching, e.g. puncturing or repetition of code symbols · CPC title

• H04W72/0446

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