Question: In split gNB architecture with centralized PCI assignment, who is responsible for reassigning a new Physical Cell ID (PCI) for an NR cell that is subject to PCI conflict?
Option 1: The gNB-DU
Option 2: The OAM
Option 3: The gNB-CU
Option 4: The UE
Explanation: In split gNB architecture with centralized PCI assignment, the gNB-CU detects PCI conflict of NR cells and reports the NR cells suffering PCI conflict to OAM directly. Then, the OAM is in charge of reassigning a new PCI for the NR cell subject to PCI conflict.