Question: Upon receiving a RAR that removes one or several QoS Rules from an IP-CAN Session restricted to emergency services, what action(s) does the BBERF take depending on the scope of removal?
Option 1: Initiate an IP-CAN bearer termination procedure for all cases, regardless of the number of QoS Rules removed.
Option 2: - Initiate an IP-CAN bearer modification procedure when not all QoS Rules are removed. - Initiate an IP-CAN bearer termination procedure when all QoS Rules bound to an IP-CAN bearer are removed.
Option 3: Ignore the RAR for emergency services as QoS Rules are not applicable.
Option 4: Always notify the PCRF before taking any action on the IP-CAN bearer.
Explanation: This is correct because the BBERF adapts its response based on the extent of the QoS Rules removal. If all rules bound to a bearer are removed, terminating the bearer makes sense for efficient resource management. Conversely, if only some rules are removed, modifying the existing bearer setup is more appropriate to maintain necessary service continuity while adjusting to new rule sets, ensuring both resource optimization and service persistence as required by emergency services' critical nature.