Question: In a WLAN deployment, how does a PCRF link IP-CAN sessions on Gx with a Gateway Control Session on S9a for the same UE?
Option 1: Based solely on the UE's IMSI
Option 2: Using only the UE's local IP address
Option 3: Combining both the UE's IMSI and UE local IP address
Option 4: Through direct interaction with the BPCF
Explanation: In WLAN deployments, to accurately link sessions, the PCRF relies on two key identifiers for precise session management. The correct approach involves utilizing both the UE's International Mobile Subscriber Identity (IMSI) and the UE's local IP address. This dual-identifier method enhances the accuracy of session linking, crucial for efficient policy enforcement and charging control.