Methods, architectures, apparatuses and systems for network energy saving aware channel state information feedback for multi transmit/receive point coherent transmissions

A wireless transmit/receive unit (WTRU) comprising circuitry, including any of a transmitter, a receiver, a processor, and memory, configured to:

• receive network configuration information for coherent joint transmission, wherein the network configuration information indicates a performance loss constraint and any of (i) a nominal number of transmit/receive point (TRPs) within a plurality of TRPs, (ii) a nominal number of antenna panels within a plurality of antenna panels per TRP, and (iii) a nominal number of spatial beams per layer;
• determine a set of constrained precoding matrices for coherent joint transmission satisfying any of (i) a first constraint associated with the nominal number of TRPs, (ii) a second constraint associated with the nominal number of antenna panels and (iii) a third constraint associated with the nominal number of spatial beams per layer;
• select a constrained precoding matrix from the set of constrained precoding matrices based on a performance loss associated with the constrained precoding matrix satisfying the performance loss constraint;
• and
• transmit reporting information indicating the selected constrained precoding matrix and the performance loss.