Question: What information, in addition to intercepted content, may be transferred over the X3-interface from the Gateway Mobile Location Centre (GMLC) / Serving and System Architecture Evolution (SAE) AS (GCSE AS) to the Delivery Function for 3GPP (DF3) to facilitate lawful interception functionality?
Option 1: Only IMSI, IMEI, and ProSe UE ID for target identification
Option 2: Correlation number, time stamp, and direction of communication only
Option 3: A combination including identity used for interception (e.g., IMSI, IMEI, ProSe UE ID), correlation number, source identity of a media stream, time stamp, and communication direction
Option 4: Just the time stamp and the type of service being intercepted (voice, data, etc.)
Explanation: For the DF3 to effectively perform its lawful interception functions, it requires not just the content of communications but also contextual information. This includes various identifiers for accurate targeting, a correlation number for linking related intercepts, the source identity of media streams for clarity in group communications, time stamps for chronological context, and communication direction (to/from the target) to understand the flow of information. Option 3 encompasses all these necessary details, ensuring comprehensive support for lawful interception operations.