Method and apparatus for csi reference resource and reporting window

A base station (BS) comprising:

• a processor;
• and
• a transceiver operably coupled to the processor, the transceiver configured to:
• transmit a configuration about a channel state information (CSI) report, the configuration including information about (i) a set of time slots S for the CSI report, (ii) X channel quality indicators (CQIs), and (iii) N time slots, where, X≥1, N ∈ S, S includes {1,2}, and the N time slots are from the set of time slots S and are associated with the X CQIs, and
• receive the CSI report including (i) an indicator indicating multiple precoding matrices and each slot in the set of time slots S is associated with one of the multiple precoding matrices, and (ii) the X CQIs.

A method performed by a user equipment (UE), the method comprising:

• receiving a configuration about a channel state information (CSI) report, the configuration including information about (i) a set of time slots S for the CSI report, (ii) X channel quality indicators (CQIs), and (iii) N time slots, where, X≥1, N ∈ S, S includes {1,2}, and the N time slots are from the set of time slots S and are associated with the X CQIs;
• determining the X CQIs based on the N time slots;
• and
• transmitting the CSI report including (i) an indicator indicating multiple precoding matrices and each slot in the set of time slots S is associated with one of the multiple precoding matrices, and (ii) the X CQIs.