ives the trigger on DCI command Aperiodic Not supported Not supported Triggered by DCI or CSI-RS activation command 500 Chapter 4 Table 4.12: Major components of NR CSI framework [9]. CSI Report Settings CSI Resource Settings CSI Trigger States It defines what CSI to It defines what signals to use to It associates "what CSI to report report and when to compute CSI. and when to report it" with "what report it. A resource setting configures more signals to use to compute CSI." Quantities to report: than one CSI resource sets where Links report settings with CSI related or L1-RSRP each CSI resource set consists of resource settings related CSI-RS resources (either NZP CSI- Contains the list of associated Time-domain RS or CSI-IM); and SS/PBCH CSI-ReportConfig behavior: aperiodic, Block Resources that are used for semi-persistent, L1-RSRP calculation periodic Time-domain behavior: aperiodic, Frequency-domain semi-persistent, periodic as well as granularity: reporting periodicity and slot offset band, wideband, Note: The number of CSI-RS Resource Sets subband is limited to one, if CSI Resource Setting is Time-domain periodic or semi-persistent restrictions: For channel and interference measurements Codebook configuration parameters: Type-l and Type-II radio supports analog beamforming and high-resolution CSI feedback through beam manage- ment, where a UE measures a set of analog beams for each digital port and reports the beam quality. The gNB then assigns a number of analog beams to the UE. As the downlink channel experienced by the UE varies, the gNB can change this assignment when the link associated with an assigned beam deteriorates. While beam management is especially instrumental in above 6 GHz frequency bands, it can also be applied to sub-6 GHz bands. Furthermore, NR supports a modular and scalable CSI framework, where high-resolution spatial channel infor- mation is provided via two-stage precoding. The first stage involves the choice of a basis sub- set, and the second stage incorporates a set of coefficien