Question: During handover in a 3GPP network, when a BBF (Bearer Binding Function) moves from a PCEF (Policy and Charging Enforcement Function) to a BBERF (Bearer Binding and Event Reporting Function) with a different IP-CAN type, how is the new BBERF initially classified by the PCRF (Policy and Charging Rules Function)?
Option 1: As a primary BBERF immediately upon creating a Gateway Control Session.
Option 2: As a non-primary BBERF until it reports an IP-CAN type matching that of the PCEF.
Option 3: As a primary BBERF only if it's the first to report the new IP-CAN type among multiple BBERFs.
Option 4: The classification depends on the UE's (User Equipment) current bearer establishment mode.
Explanation: According to handover procedures, when a BBF moves from a PCEF to a BBERF with a different IP-CAN type, the new BBERF is initially classified as a non-primary BBERF. It may later be reclassified as primary if its reported IP-CAN type matches that of the PCEF and other conditions are met, ensuring seamless policy and charging control across different access networks.