on Signal Block), CSI-RS, and SSB plus CSI-RS can be used for beam management; CSI-RS with 2-32 antenna ports can be used for codebook-based transmission. Compared with LTE (e)FD-MIMO, the codebook design in 5G NR is simplified to some extent. Roughly two types of codebooks are specified in 5G NR: Type I for SU-MIMO and Type II for MU-MIMO. For Type I, the single panel codebook supports uniform spacing among antenna elements at a base station, and the multiple panel codebook supports uniform spacing among antenna elements within a panel, but the spacing between antenna elements from different panels can be different. From a device implementation point of view, separate processing procedures for Type I and Type II may be needed to achieve optimized spectrum efficiency. For both Type I and Type II, a number of sub-modes are defined to achieve trade-offs between feedback accuracy and feedback overhead depending on the device's capability and the network's configuration, and hence device implementations need to be optimized for those modes as well. 5G NR supports a fast CSI report which is for up to four ports and is subject to a number of restrictions and normal CSI reports. Hence, the network can decide which CSI report to trigger depending on channel conditions, deployment scenario, or operating spectrum (e.g. over unlicensed spectrum a fast CSI report may deliver CSI feedback with less chance of being stopped due to listen-before-talk), and a device's reported processing capabilities. Due to all the provided flexibility, many derived configurations from Radio Resource Control (RRC) signaling need to be accessed by a UE at a fast pace depending on the dynamic signaling from the network; for that reason, they often have to be stored in internal memory, which is typically limited in its capacity and also expensive. Consequently, the size of RRC signaling itself, especially that of CSI-MeasConfig information element [3], which provides all the configurations for CSI acquisition at a UE, has been a key consideration i