Let us discuss in detail the above two configurations. For configuration 1, in scenarios without QCL Type D such as below 6 GHz, that is, QCL Type C, the average delay and Doppler shift can be inferred from the SS Block for the utilization of the periodic TRS. If QCL Type D is configured and the UE can use the same Spatial Rx filter for the reception of the periodic TRS that was used for the reception of the SS Block, then the DL RS 2 is configured, and hence the UE can infer the average delay, Doppler shift, and Spatial Rx properties from the SS Block. The case in configuration 2 is more interesting: 6.12 5G MIMO and Beamforming Operation Table 6.6 TCI states for periodic TRS. Valid TCI state qcl-Type2 configuration DL RS 1 qcl-Type1 DL RS 2 (if configured) (if configured) SS Block QCL-TypeC SS Block QCL-TypeD SS Block QCL-TypeC CSI-RS for beam management QCL-TypeD below 6 GHz, it is clear that the UE infers the average delay and Doppler shift from the SS Block for utilization of the periodic TRS; above 6 GHz, the UE gets the average delay and Doppler shift from the SS Block while the Spatial Rx properties from a CSI-RS configured to be used for beam management. This means that the beamwidth used for the transmission of the CSI-RS for beam management is used for the transmission of the periodic TRS, but it is different from the beamwidth used for the transmission of the SS Block. This scenario is also the one in which the SS Block can be transmitted with a wider beam, while the CSI-RS for beam management and the periodic TRS are transmitted with a narrower beam. There is also the case for aperiodic TRS, which simply follows the periodic TRS configuration as the aperiodic TRS cannot exist in the system without a periodic TRS (Table 6.7). For a CSI-RS used for CSI measurements, the possible TCI configurations described in Table 6.8: For a CSI-RS used for beam management, the possible TCI configurations described in Table 6.9: For a DM-RS for PDCCH decoding, the possible TCI configurations described in Table 6.10: 