US 11,057,091 B2 · Reference signals for tracking

Abstract

Methods, systems, and devices for wireless communications are described. A base station may identify a channel condition change (e.g., a beam switch, a bandwidth part (BWP) switch) for a channel between the base station and a user equipment (UE). The base station may transmit a downlink control information (DCI) that indicates the identified channel condition change and a resource allocation for transmissions between the base station and the UE. The base station may select a pattern of time and frequency resources for a channel state information reference signal (CSI-RS) for tracking for the UE, and transmit the CSI-RS using the identified pattern. The UE may identify the pattern based on the received DCI, and receive the CSI-RS using the identified pattern of time and frequency resources.

Claims29

Dependent claims

A method for wireless communication at a user equipment (UE), comprising:

receiving downlink control information (DCI) that indicates a resource allocation for transmissions between the UE and a base station;
identifying, based at least in part on the received DCI, a set of aperiodic time and frequency resources allocated for a channel state information reference signal (CSI-RS) for tracking to be transmitted by the base station;
identifying a second bandwidth of a downlink shared channel scheduled for the UE;
determining a bandwidth for the CSI-RS based at least in part on the identified second bandwidth of the downlink shared channel scheduled for the UE;
and
receiving the CSI-RS using the identified set of aperiodic time and frequency resources based at least in part on the bandwidth for the CSI-RS.

3 more elements

An apparatus for wireless communication, comprising:

a processor;
memory coupled with the processor;
and
instructions stored in the memory and executable by the processor to cause the apparatus to:
receive downlink control information (DCI) that indicates a resource allocation for transmissions between the apparatus and a base station;
identify, based at least in part on the received DCI, a set of aperiodic time and frequency resources allocated for a channel state information reference signal (CSI-RS) for tracking to be transmitted by the base station;
identify a second bandwidth of a downlink shared channel scheduled for the apparatus;
determine a bandwidth for the CSI-RS based at least in part on the identified second bandwidth of the downlink shared channel scheduled for the UE;
and
receive the CSI-RS using the identified set of aperiodic time and frequency resources based at least in part on the bandwidth for the CSI-RS.

7 more elements

Dependencies are inferred from the claim text.

Reference signals for tracking

Life of this patent

Reference signals for tracking

Life of this patent

Abstract

Claims29