Question: In UTRAN, which of the following is a prerequisite for the DRNC to initiate the Dedicated Measurement Reporting procedure for a specific UE?
Option 1: Completion of the Cell Update procedure
Option 2: Establishment of a Radio Link for the relevant UE Context
Option 3: Receipt of a Dedicated Measurement Initiation request from the SRNS and establishment of a signalling bearer connection for the UE Context
Option 4: Handover to a different RNC
Explanation: The correct answer requires understanding the sequence and prerequisites of procedures in UTRAN's RNSAP signalling. The Dedicated Measurement Reporting procedure is used by the DRNS (Destination Radio Network Subsystem) to report measurement results back to the SRNS (Source Radio Network Subsystem) after receiving a request via the Dedicated Measurement Initiation procedure. Thus, for the DRNC (DRNS's Controller) to initiate this reporting, it must have first received such a request and ensured a signalling bearer connection is in place for the UE Context, making Option 3 the most comprehensive and correct prerequisite.