Question: In an EPC-based non-3GPP IP-CAN requiring dynamic QoS control via Gxa interface, what functional element must be included?
Option 1: PCEF (Policy and Charging Enforcement Function)
Option 2: BBERF (Bearer Binding and Event Reporting Function)
Option 3: PGW (Packet Data Network Gateway)
Option 4: SGW (Serving and Packet Data Network Gateway)
Explanation: The BBERF is crucial for managing bearer bindings and reporting events, which are essential for dynamic QoS control in non-3GPP IP-CANs that utilize the Gxa interface. This aligns with the requirement for dynamic QoS adjustments, making BBERF's inclusion necessary for such scenarios to ensure proper service delivery and resource allocation.