abilities, QoS, etc. 1. The UE has the measurement configuration provided by the source gNB, including frequencies to measure on, parameters to report, and thresholds to trigger the mea- surement reporting. 2. Based on the measurement report and potentially other information (e.g. cell load) and while taking into account UE mobility restrictions and radio capabilities, the source gNB decides to hand over the UE and selects the handover target. 3.3 NG Radio Access Network 3. The source gNB sends the Xn-AP Handover Request message to the target gNB over the Xn interface. The message caries the transparent RRC container with the Handover- PreparationInformation RRC message. Additionally, the message includes the target cell ID, list of PDU sessions, and other information. 4. The target gNB allocates the resources for the UE while taking into account the infor- mation received in the RRC container in step 3. 5. If the target gNB decides to admit the handover, it sends the Handover Request Acknowledge message to the source gNB, which includes a transparent container to be sent to the UE as an RRC message to perform the handover and the lists of admitted and not admitted PDU sessions. This completes the handover preparation stage. 6. The source gNB triggers the handover by sending the RRCReconfiguration message to the UE, containing the information required to access the target cell (received in step 5): at least the target cell ID, the new C-Radio Network Temporary Identifier (RNTI), and the target gNB security algorithm identifiers for the selected security algorithms. The source gNB sends the SN Status Transfer message to the target gNB to transfer the uplink/downlink PDCP SN and Hyper Frame Number (HFN) status. 8. After the UE has successfully connected to the target cell, it completes the handover procedure by sending the RRCReconfigurationComplet message to target gNB. 9. The target gNB sends the NG-AP Path Switch Request message to AMF over the NG interface to trigger 5GC to switch the downlink data path toward 