Question: In UTRAN, what is the primary purpose of the Paging procedure initiated by the Serving Radio Network Controller (SRNC) towards the Controlling Radio Network Controller (CRNC)?
Option 1: To establish a dedicated channel for voice call setup between UE and CRNC.
Option 2: To instruct the CRNC to page a User Equipment (UE) in a cell or UTRAN Registration Area (URA) under its control.
Option 3: To request location update of a UE from the CRNC to the SRNC for handover preparation.
Option 4: To release radio resources allocated to a UE in the CRNC's controlled cell due to inactivity.
Explanation: The correct answer reflects the actual purpose of the Paging procedure. This procedure is crucial for locating and connecting with a UE that is in an idle state, by prompting the CRNC to page the UE across cells or URAs it manages, utilizing connectionless mode signalling for efficient, non-continuous communication.