Question: In a Fixed Access interworking scenario with a Home-Routed setup, what action does the H-PCRF take upon receiving an IP-CAN Session Establishment indication over Gx for a UE's first IP-CAN session?
Option 1: Establish a Gateway Control Session to the V-PCRF over S9.
Option 2: Terminate any existing Gateway Control Sessions with the V-PCRF over S9.
Option 3: Send QoS rules to the PCEF for admission control without involving the V-PCRF.
Option 4: Ignore the indication if no active PCC Rules are present for the UE.
Explanation: According to H-PCRF functionalities for Fixed Access interworking in a home-routed scenario, when an IP-CAN Session Establishment indication is received over Gx and it's the first IP-CAN session for the User Equipment (UE), the H-PCRF must establish a Gateway Control Session with the Visited Policy and Charging Rules Function (V-PCRF) over the S9 interface, ensuring seamless policy enforcement and charging control across networks.