USCH, because of the large payload which is envisioned for such a feedback mechanism, a two-part CSI report is used. Two issues need to be mentioned for this design: the information which is mapped on the two parts depends on the CSI feedback type, as we will describe next, and there are also some rules on how the two parts are transmitted. In terms of rules, Part 1 shall be transmitted in its entity before Part 2, one reason being the fact that Pat 1 can be used to identify the number of information bits in Part 2. The following information rules are used for the two types of CSI feedback: For Type I CSI feedback, Part 1 contains RI (if reported), CRI (if reported), and CQI for the first codeword. Part 2 contains PMI and the CQI for the second codeword when the rank is larger than four. For Type II CSI feedback, Part 1 contains RI, CQI, and an indication of the number of nonzero wideband amplitude coefficients per layer for Type II CSI. Part 2 contains the PMI and the Type II CSI. For such part-like reporting, the fields of Part 1 and 2 are separately encoded while the fields of Part 1 are also separated encoded. If Report Quantity is configured with CRI/RSRP or SSBRI/RSRP, the CSI feedback consists of a single part. And in case of collisions, omission rules are defined to enable the UE to omit a portion of the Part 2 CSI according to a defined priority order. When CSI parameters are calculated at the UE, some dependencies between the CSI parameters need to be followed: Layer Indicator (LI) shall be calculated based on the reported CQI, PMI, RI, and CRI. CQI shall be calculated based on the reported PMI, RI, and CRI. PMI shall be calculated based on the reported RI and CRI. RI shall be calculated C based on the reported CRI. 6.12 5G MIMO and Beamforming Operation Table 6.13 Subband sizes. Bandwidth used Subband by the UE (PRBs) size (PRBs) 24-72 73-144 145-275 16, 32 Another important aspect of reporting configurations is the frequency granularity of the CSI reports, which is dependent on the so-called subband s