Question: Under what condition can a CRNC (Controlling RNC) initiate the Dedicated Measurement Initiation procedure when a Prepared Reconfiguration already exists in a UTRAN Iub interface context?
Option 1: When the Node B is in idle mode.
Option 2: If the measurement is for a different frequency band.
Option 3: If the Node B Communication Context ID IE in the DEDICATED MEASUREMENT INITIATION REQUEST message is set to 'All NBCC'.
Option 4: When the Dedicated Measurement Initiation procedure is for a handover scenario.
Explanation: According to the specified telecom protocol, the CRNC can initiate the Dedicated Measurement Initiation procedure despite an existing Prepared Reconfiguration if the Node B Communication Context ID IE in the request message is specifically set to 'All NBCC', indicating it applies to all Node B Communication Contexts. This exception allows for broader measurement initiation under specific signaling conditions, highlighting the importance of precise parameter settings in UTRAN Iub interface management.