Question: When invoking or revoking a Priority EPS (Evolved Packet System) Bearer Service, what action does the Policy and Charging Rules Function (PCRF) take regarding Quality of Service (QoS) Rules for the Bearer Border Gateway (BBERF)?
Option 1: The PCRF directly applies the QoS Rules to the User Equipment (UE).
Option 2: The PCRF derives the QoS Rules from the PCC Rules but only upon deactivation.
Option 3: The PCRF ignores QoS Rule provisioning for Priority EPS Bearer Services.
Option 4: The PCRF provisions the BBERF with the applicable QoS Rules upon both activation and deactivation.
Explanation: This is correct because, according to the telecom standards for Policy and Charging Control (PCC), when a Priority EPS Bearer Service is invoked or revoked, the PCRF must ensure that the BBERF has the most current QoS Rules to manage traffic effectively. Provisioning upon both activation and deactivation ensures seamless service quality management. This highlights the importance of dynamic QoS rule updates in maintaining service integrity in telecom networks.