Question: In a scenario where a PCEF receives conflicting CSG information reporting indications from the PCRF for a single IP-CAN session, how should the PCEF proceed with requesting user CSG information change from the SGSN?
Option 1: Derive the highest level of detail required and request the user CSG information change from the SGSN.
Option 2: Ignore the conflicting indications and maintain the current reporting level.
Option 3: Request clarification from the PCRF before proceeding with any action.
Option 4: Automatically default to the lowest level of detail for reporting.
Explanation: To ensure compliance with the most detailed reporting requirement, the PCEF must prioritize the highest level of detail requested. This approach guarantees that all necessary information is reported, aligning with the principle of fulfilling the most stringent reporting condition to avoid potential under-reporting. In telecom networks, especially in scenarios involving policy and charging control (PCC), accurately adhering to the highest required detail level is crucial for billing, service provision, and subscriber management.