Question: In a Policy and Charging Control (PCC) architecture, what is the primary responsibility of the PCEF regarding Quality of Service (QoS) for each IP CAN Bearer?
Option 1: To negotiate QoS with the User Equipment (UE: User Equipment) directly.
Option 2: To enforce policy-based authorization ensuring requested QoS aligns with "Authorized QoS" per bearer.
Option 3: To manage billing and charging for QoS upgrades on IP CAN Bearers.
Option 4: To allocate IP addresses for IP CAN sessions based on QoS requirements.
Explanation: The correct answer, Option 2, reflects the PCEF's (Policy and Charging Enforcement Function) role in ensuring that the Quality of Service (QoS) requested for each IP CAN (IP Connectivity Access Network) Bearer is authorized and compliant with predefined policies. This enforcement is crucial for maintaining service quality and preventing unauthorized QoS allocations, which could impact network performance or billing integrity. The PCEF acts as a policy enforcement point, making this option the most accurate in describing its primary responsibility regarding QoS per IP CAN Bearer.