Configuration of intermediate set size for frequency domain basis reporting

A method for communication by a user equipment (UE) in a wireless network, comprising:

• receiving, from a base station, channel state information (CSI) report configuration, configuring the UE for reporting frequency domain (FD) basis information including one or more parameters for calculating a size corresponding to an intermediate set of a plurality of frequency domain (FD) bases, wherein the intermediate set is common to all layers of a first rank, and the intermediate set is a subset of the plurality of FD bases;
• determining the size of the intermediate set based on one or more parameters included in the CSI report configuration;
• determining one or more FD bases for each layer according to the size of the intermediate set, wherein the one or more FD bases are characterized by an M value indicative of a number of the one or more FD bases, wherein the M value is based on a total number of FD bases and a number of Precoding Matrix Indicator (PMI) subbands within a Channel Quality Indicator (CQI) subband, wherein the total number of FD bases is based on network configuration, and the number of PMI subbands within a CQI subband is network configured;
• and
• transmitting, to the base station, an indication of the one or more FD bases for each layer based on the size of the intermediate set.

A user equipment (UE), comprising:

• one or more memories;
• and
• at least one processor coupled to the one or more memories, the at least one processor and the one or more memories configured to cause the UE to:
• receive, from a base station, channel state information (CSI) report configuration, configuring the UE for reporting frequency domain (FD) basis information including one or more parameters for calculating a size corresponding to an intermediate set of a plurality of frequency domain (FD) bases, wherein the intermediate set is common to all layers of a first rank, and the intermediate set is a subset of the plurality of FD bases;
• determine the size of the intermediate set based on one or more parameters included in the CSI report configuration and based on a maximum M value across all layers for a particular rank, wherein to determine the size of the intermediate set, the at least one processor and the one or more memories cause the UE to scale the maximum M value across all layers for the particular rank by a first scaling factor α to determine a first value;
• determine one or more FD bases for each layer according to the size of the intermediate set, wherein the one or more FD bases are characterized by an M value indicative of a number of the one or more FD bases and based on the CSI report configuration;
• and
• transmit, to the base station, an indication of the one or more FD bases for each layer based on the size of the intermediate set.