These are:*D-RNC: Drift RNC*S-RNC: Serving RNCHowever, as far as the NodeB is concerned, the RNC may play a third role:*C-RNC: Controlling RNCIt is important to know that one RNC can assume more than one role at any time.
Так же RNC может играть третью роль в зависимости от того, насколько близко клиентское устройство UE находится к базовой станции Node B:* C-RNC ().