3GPP Access: 3GPP Access includes all the entities involved in the network are defined by 3GPP. Example: A 3GPP defined UE getting access from 5G-RAN ( gNB ) and 5GC. Non-3GPP Access: Non-3GPP Access includes access from the entities those are not defined by 3GPP such as WLAN. Non-3GPP access is further divided into 2 … More Non-3GPP Trusted and Untrusted Access

Channel State Information Reference Signal (CSI-RS) enables UEs to report channel state information to the network. These signals are used for beamforming support and can be configured either beam specific or UE specific. The resource elements carrying the CSI-RS can be configured to be either Zero Power CSI-RS (ZP-CSI-RS) or Non Zero Power CSI-RS (NZP-CSI-RS). … More Zero Power CSI-RS (ZP-CSI-RS) in 5G NR