Apparatus and methods of simultaneous user equipment (UE) receive (RX) beam refinement

An apparatus, comprising:

• at least one memory;
• and
• at least one processor coupled with the at least one memory and configured to cause the apparatus to:
• transmit a Channel State Information Reference Signal (CSI-RS) configuration comprising one or more CSI-RS resource sets for Receive (Rx) beam refinement,
• wherein the CSI-RS configuration comprises one CSI-RS resource set, and each CSI-RS resource in the CSI-RS source set is configured with a plurality of QCL assumptions associated with a plurality of CSI-RS port groups, wherein each QCL assumption is associated with a CSI-RS port group, and
• wherein the CSI-RS resource sets comprising a plurality of CSI-RS resources for transmission of a plurality of CSI-RSs that are Frequency-Division Multiplexed (FDMed),
• transmit, simultaneously, the CSI-RSs based on one or more Quasi Co-Location (QCL) assumptions;
• and
• receive a reporting according to a Channel State Information (CSI) reporting configuration.

A method, comprising:

• receiving, by a receiver, Channel State Information Reference Signal (CSI-RS) configuration comprising one or more CSI-RS resource sets for Receive (Rx) beam refinement, the CSI-RS resource sets comprising a plurality of CSI-RS resources for transmission of a plurality of CSI-RSs that are Frequency-Division Multiplexed (FDMed);
• receiving, by the receiver, simultaneously, the CSI-RSs based on one or more Quasi Co-Location (QCL) assumptions;
• performing, by a processor, a simultaneous Rx beam refinement corresponding to the CSI-RSs that are FDMed;
• and
• transmitting, by a transmitter, a reporting according to a Channel State Information (CSI) reporting configuration.