Question: Upon receiving an unsolicited authorization decision with updated QoS information within a RAR (Re-authorization Request) from the PCRF (Policy and Charging Rules Function), what action does the BBERF (Broadband BRAS/BNG Equipment Facing Function) take if the existing IP-CAN bearer's QoS doesn't match the updated authorized QoS?
Option 1: The BBERF sends a notification to the UE (User Equipment) about the QoS update without modifying the bearer.
Option 2: The BBERF performs a network-initiated QoS modification to adjust the QoS of the IP-CAN bearer to match the updated authorized level.
Option 3: The BBERF ignores the updated QoS information if the existing bearer's QoS is deemed sufficient for current traffic conditions.
Option 4: The BBERF requests further clarification from the PCRF before taking any action on the IP-CAN bearer's QoS.
Explanation: This is because, according to the described policy enforcement procedures for authorized QoS, when the BBERF receives an updated QoS authorization decision from the PCRF that doesn't match the current QoS of the IP-CAN bearer, it must proactively adjust the bearer's QoS settings to align with the newly authorized levels. This ensures compliance with the latest policy decisions made by the PCRF, maintaining the integrity of the network's resource allocation and service quality commitments.