Question: In a non-3GPP access scenario (Gxa), where is the Bearer Binding and Event Reporting Function (BBERF) typically located, and what is its primary role in user plane traffic handling?
Option 1: Trusted non-3GPP access; Ensuring QoS control by binding service data flows to appropriate bearers.
Option 2: PDN Gateway (P-GW); Managing mobility for trusted and untrusted non-3GPP accesses.
Option 3: Policy and Charging Rules Function (PCRF); Enforcing policy decisions for resource allocation.
Option 4: Serving Gateway (S-GW); Handling only bearer binding without event reporting.
Explanation: In a non-3GPP access scenario, the BBERF is located in a trusted non-3GPP access. Its primary role includes ensuring QoS control by correctly binding service data flows to bearers with the appropriate QoS class and performing event reporting to the PCRF based on installed triggers.