Question: When a dedicated IP-CAN bearer is terminated, what action does the PCEF take regarding the affected PCC rules, and what type of request does it send to the PCRF?
Option 1: The PCEF modifies the affected PCC rules and sends an "INITIAL_REQUEST" to the PCRF with a Charging-Rule-Report AVP.
Option 2: The PCEF removes the affected PCC rules and sends an "UPDATE_REQUEST" to the PCRF with a Charging-Rule-Report AVP specifying the rules as inactive due to RESOURCE_ALLOCATION_FAILURE.
Option 3: The PCEF suspends the affected PCC rules and sends a "TERMINATION_REQUEST" to the PCRF without a Charging-Rule-Report AVP.
Option 4: The PCEF leaves the affected PCC rules unchanged and does not send any request to the PCRF upon bearer termination.
Explanation: Upon detecting the termination of a dedicated IP-CAN bearer, the Policy and Charging Enforcement Function (PCEF) removes the affected Policy and Charging Control (PCC) rules. It then notifies the Policy and Charging Rules Function (PCRF) by sending an update request with a Charging-Rule-Report AVP, specifying the affected PCC rules as inactive due to RESOURCE_ALLOCATION_FAILURE, ensuring the PCRF is informed of the bearer's status change and the reason for the rule inactivation.