Efficient low-latency csi acquisition in a downlink burst

A wireless transmit receive unit (WTRU) comprising:

• a transceiver;
• and
• a processor in communication with the transceiver, the processor and transceiver adapted to:
• receive configuration information including a downlink (DL) burst format table defining a plurality of DL burst formats, wherein each DL burst format of the plurality of DL burst formats indicates a respective time domain resource allocation (TDRA) of one or more physical downlink shared channels (PDSCHs) and one or more sounding reference signal (SRS) resources associated with the each respective DL burst format;
• receive downlink control information (DCI) with a single field indicating a DL burst format from the plurality of DL burst formats;
• transmit a SRS using one or more SRS resources associated with the indicated DL burst format;
• and
• receive one or more PDSCHs using a TDRA associated with the indicated DL burst format.

A method for a wireless base station, the method comprising:

• sending configuration information to a wireless transmit receive unit (WTRU), the configuration information including a downlink (DL) burst format table defining a plurality of DL burst formats, wherein each DL burst format of the plurality of DL burst formats indicates a time domain resource allocation (TDRA) of one or more physical downlink shared channels (PDSCHs), and one or more sounding reference signal (SRS) resources associated with the each respective DL burst format;
• sending downlink control information (DCI) to the WTRU, the DCI including a single field indicating a DL burst format from the plurality of DL burst formats;
• receiving a SRS transmitted by the WTRU using one or more SRS resources associated with the indicated DL burst format;
• and
• transmitting one or more PDSCHs using the TDRA associated with the indicated DL burst format.