Channel state information reporting

A method of wireless communications, comprising:

• receiving, from a first communication device by a second communication device, channel state information CSI corresponding to P Channel State Information Reference Signal (CSI-RS) ports, where P is a positive integer;
• and
• performing, by the second communication device, a communication with the first communication device according to the CSI,
• wherein the CSI includes one set of a precoding matrix indicator PMI, Q sets of channel quality indicators CQIs, and R values of rank indicator RI,
• wherein the one set of PMI indicates C4 sets of precoding matrices corresponding to C4 first type of time domain units, the Q sets of CQIs corresponds to Q second type of time domain units, the R values of RI corresponds to R third type of time domain units, and
• wherein Q, R, C4 are positive integers,
• wherein at least one of Q, R, C4 is greater than 1, C4≥Q≥R, one of the R third type of time domain units includes one or more second type of time domain units, one of the R third type of time domain unit includes one or more first type of time domain units, one of the Q second type of time domain unit includes one or more of the C4 first type of time domain units, each of the C4 first type of time units corresponds to one or more slots.

A communication device comprising at least one processor that is configured to:

• determine channel state information CSI corresponding to P Channel State Information
• Reference Signal (CSI-RS) ports, where P is a positive integer;
• and
• transmit, to a second communication device, the CSI;
• wherein the CSI includes one set of a precoding matrix indicator PMI, Q sets of channel quality indicators CQIs, and R values of rank indicator RI,
• wherein the one set of PMI indicates C4 sets of precoding matrices corresponding to C4 first type of time domain units, the Q sets of CQIs corresponds to Q second type of time domain units, the R values of RI corresponds to R third type of time domain units, and
• wherein Q, R, C4 are positive integers,
• wherein at least one of, R, C4 is greater than 1, C4≥Q≥R, one of the R third type of time domain units includes one or more second type of time domain units, one of the R third type of time domain unit includes one or more first type of time domain units, one of the Q second type of time domain unit includes one or more of the C, first type of time domain units, each of the C4 first type of time units corresponds to one or more slots.

A communication device comprising at least one processor that is configured to:

• receive, from a first communication device, channel state information CSI corresponding to P Channel State Information Reference Signal (CSI-RS) ports, where P is a positive integer;
• and
• perform a communication with the first communication device according to the CSI,
• wherein the CSI includes one set of a precoding matrix indicator PMI, Q sets of channel quality indicators CQIs, and R values of rank indicator RI,
• wherein the one set of PMI indicates C4 sets of precoding matrices corresponding to C4 first type of time domain units, the Q sets of CQIs corresponds to Q second type of time domain units, the R values of RI corresponds to R third type of time domain units, and
• wherein Q, R, C4 are positive integers,
• wherein at least one of, R, C4 is greater than 1, C4≥Q≥R, one of the R third type of time domain units includes one or more second type of time domain units, one of the R third type of time domain unit includes one or more first type of time domain units, one of the Q second type of time domain unit includes one or more of the C4 first type of time domain units, each of the C4 first type of time units corresponds to one or more slots.