Method and apparatus for downlink and uplink CSI acquisition

A base station (BS) comprising:

• a processor configured to generate configuration information including a channel state information (CSI) reporting configuration and a CSI resource configuration,
• wherein the CSI reporting configuration includes:
• information associated with a CSI reporting type which is one of periodic, semi-persistent, or aperiodic;
• and
• information associated with a set of physical resource blocks (PRBs) for which CSI is reported;
• and
• wherein the CSI resource configuration includes:
• information associated with locations of CSI-reference signals (CSI-RSs) in a time domain and a frequency domain;
• and
• information associated with indicating a number of CSI-RS ports;
• a transceiver operably connected to the processor, the transceiver configured to:
• transmit, to a user equipment (UE), the configuration information via radio resource control (RRC) signaling;
• and
• receive, from the UE, CSI based on the CSI reporting configuration and the CSI resource configuration.

A method for operating a user equipment (UE), the method comprising:

• receiving, by the UE from a base station (BS) via radio resource control (RRC) signaling, configuration information including a channel state information (CSI) reporting configuration and a CSI resource configuration,
• wherein the CSI reporting configuration includes:
• information associated with a CSI reporting type which is one of periodic, semi-persistent, or aperiodic;
• and
• information associated with a set of physical resource blocks (PRBs) for which CSI is reported;
• and
• wherein the CSI resource configuration includes:
• information associated with locations of CSI-reference signals (CSI-RSs) in a time domain and a frequency domain;
• and
• information associated with indicating a number of CSI-RS ports;
• decoding, by the UE, the configuration information;
• determining, by the UE, CSI based on the CSI reporting configuration and the CSI resource configuration;
• and
• transmitting, by the UE, the determined CSI on an uplink (UL) channel.

A method for operating a base station (BS), the method comprising:

• generating configuration information including a channel state information (CSI) reporting configuration and a CSI resource configuration,
• wherein the CSI reporting configuration includes:
• information associated with a CSI reporting type which is one of periodic, semi-persistent, or aperiodic;
• and
• information associated with a set of physical resource blocks (PRBs) for which CSI is reported;
• and
• wherein the CSI resource configuration includes:
• information associated with locations of CSI-reference signals (CSI-RSs) in a time domain and a frequency domain;
• and
• information associated with indicating a number of CSI-RS ports;
• transmitting, to a user equipment (UE), the configuration information via radio resource control (RRC) signaling;
• and
• receiving, from the UE, CSI based on the CSI reporting configuration and the CSI resource configuration.