Systems and methods for aperiodic measurement reference signal transmission in multiple antenna systems
AssigneeInterDigital Patent Holdings, Inc.
InventorsMoon-Il Lee, Janet A. Stern-Berkowitz
Life of this patent
Estimating the term…
Abstract
Systems and methods are disclosed for determining a first downlink control indicator (DCI) and a second DCI, determining a set of active aperiodic channel state information reference signals (A-CSI-RSs) based on the first DCI, and determining a subset of the set of active A-CSI-RSs based on the second DCI. A WTRU may perform resource element (RE) muting based on a set of active A-CSI-RSs. A WTRU may perform channel state information (CSI) measurement based on a subset of a set of active A-CSI-RSs.
Claims12
A wireless transmit/receive unit (WTRU), the WTRU comprising:
- a processor, wherein the processor is configured to:
- receive configuration information for a channel state information reference signal (CSI-RS), wherein the configuration information indicates one or more CSI-RS resources;
- receive scheduling information for reception of a physical downlink shared channel (PDSCH) transmission, wherein the scheduling information indicates PDSCH resources, wherein the PDSCH resources include a first number of resources and a second number of resources, and wherein the first number of resources overlaps with at least a CSI-RS resource from the one or more CSI-RS resources;
- and
- receive the PDSCH transmission, wherein:
- on a condition that the CSI-RS is an aperiodic non-zero power CSI-RS (NZP-CSI-RS), the processor is configured to use the first number of resources and the second number of resources, or puncture the first number of resources and use the second number of resources;
- and
- on a condition that the CSI-RS is a periodic NZP-CSI-RS, the processor is configured to use the second number of resources.
A base station, the base station comprising:
- a processor, wherein the processor is configured to:
- send configuration information for a channel state information reference signal (CSI-RS), wherein the configuration information indicates one or more CSI-RS resources;
- send scheduling information for reception of a physical downlink shared channel (PDSCH) transmission, wherein the scheduling information indicates PDSCH resources, wherein the PDSCH resources include a first number of resources and a second number of resources, and wherein the first number of resources overlaps with at least a CSI-RS resource from the one or more CSI-RS resources;
- and
- send the PDSCH transmission, wherein:
- on a condition that the CSI-RS is an aperiodic non-zero power CSI-RS (NZP-CSI-RS), the processor is configured to use the first number of resources and the second number of resources, or puncture the first number of resources and use the second number of resources;
- and
- on a condition that the CSI-RS is a periodic NZP-CSI-RS, the processor is configured to use the second number of resources.
Dependencies are inferred from the claim text.