Question: When the Gateway Control Session is not proxied to the Home Policy and Charging Rules Function (H-PCRF), which entity does the H-PCRF indirectly provide information to, via the Visited Policy and Charging Rules Function (V-PCRF) over the S9 reference point, for Gx procedures?
Option 1: Serving and Packet Data Network Gateway (S/P-GW)
Option 2: Base Band Unit (BBU)
Option 3: Mobility Management Entity (MME)
Option 4: Policy and Charging Enforcement Function (PCEF) and Broadband Border Gateway (BBERF)
Explanation: According to the policy and charging control architecture, when the Gateway Control Session is not proxied to the H-PCRF, it uses the S9 reference point to proxy information indirectly to both the PCEF (for general policy and charging rules) and the BBERF (specifically for broadband-related policies), ensuring seamless policy enforcement across different network elements in a visited network scenario.