Section: 8.21.1 NCR Integration Procedure
Content: A high-level flow chart for NCR integration is shown in Figure 8.22.1-1: Figure 8.21.1-1: The integration procedure for NCR Phase 1: NCR-MT setup. In this phase, the NCR-MT of the NCR (re-)selects a cell that broadcasts the NCR support indicator in SIB1. It then connects to the network as a UE, by performing the RRC connection setup procedure with the gNB-CU, and authentication with the 5GC. The NCR-MT includes the NCR indication in the RRCSetupComplete message. The gNB selects an appropriate AMF for the NCR. Upon receiving the NCR authorization information from 5GC, the gNB-CU provides the authorization information to the gNB-DU. NOTE: The signalling flow for UE initial access procedure as shown in Figure 8.1-1/Figure 8.9.1-1 is used for the setup of the NCR-MT. Phase 2: NCR configuration. The gNB-CU may configure the NCR via RRC. Phase 3: NCR Start Operation. After the NCR is configured, it may start serving the UE(s).