Question: Which of the following services is NOT typically considered a primary function provided by the RRC protocol to upper layers for User Equipment (UE) in an idle state (RRC_IDLE)?
Option 1: Notification of UEs about Emergency Warning Systems (ETWS) and/or Commercial Mobile Alert System (CMAS)
Option 2: Transfer of dedicated signalling for establishing or modifying connections
Option 3: Handover Decision and Execution for Active Mode UEs
Option 4: Broadcast of common control information for system access
Explanation: The RRC protocol's primary services to upper layers, especially for UEs in RRC_IDLE, include notifications (e.g., mobile terminating calls, ETWS/CMAS), broadcast of system information, and dedicated signalling transfers. Handover decisions and executions are crucial but are more associated with active mode (RRC_CONNECTED) operations rather than idle state management, making it the least fitting among the provided options as a primary service for RRC_IDLE UEs.