Cell Identity
The identifiers a cell needs to be unique under its gNB, who assigns them, why they never change, and where to read them.
How Radios Are Driven
What each radio backend makes the controller generate, what the DU it produces looks like, what a ZMQ peer is, and which radios cannot be declared.
How Mobility Reaches the CU-CP
How the neighbor relations, report configurations and administrative intent you declare on NRCells reach the running CU-CP, and what a UE sees when.