Question: During Gateway Control Session Establishment for a WLAN scenario (case 2a/2b), what specific information must the BBERF (ePDG) include in the CCR command sent to the PCRF, assuming the specified details are available?
Option 1: IMSI within the Subscription-Id AVP, and UE Local IP Address within the UE-Local-IP-Address AVP
Option 2: IMSI within the Subscription-Id AVP, type of IP-CAN within the IP-CAN-Type AVP set to "Non-3GPP-EPS", PDN information within the Called-Station-ID AVP, and UE Local IP Address within the UE-Local-IP-Address AVP
Option 3: ePDG IP address used as IPSec tunnel endpoint with the UE within the AN-GW-Address AVP, and UDP source port number of IPSec tunnel within the UDP-Source-Port AVP
Option 4: H(e)NB local IP Address within the HeNB-Local-IP-Address AVP, and type of IP-CAN within the IP-CAN-Type AVP set to "3GPP-EPS"
Explanation: For case 2a and case 2b of the WLAN scenario, the BBERF (ePDG) is required to send a CCR command with specific attributes to initiate a Gateway Control Session Establishment with the PCRF. The correct answer lists all mandatory information: subscriber's IMSI, type of IP-CAN (Non-3GPP-EPS for WLAN), PDN details if available, and UE's local IP address, necessary for the PCRF to manage the session and apply policies.