Question: What type of information is primarily transferred from the Gateway Mobile Location Centre (GMLC) Serving Cell Info for Emergency (GCSE AS) to the Delivery Function 2 (DF2) for lawful interception over the X2-interface?
Option 1: Only Cell Identity and Location Area Code for target location tracking
Option 2: Target identity (e.g., IMSI, IMEI, ProSe UE ID) and specific events with associated parameters
Option 3: Encrypted voice and data traffic for real-time surveillance
Option 4: Network performance metrics for optimization of interception processes
Explanation: For the DF2 to effectively perform its lawful interception functions, it requires precise identification of the target (via IMSI, IMEI, ProSe UE ID) and relevant event triggers with their parameters. This ensures targeted and efficient interception without unnecessary data collection.