Question: In a Control and User Plane Separation (CUPS) architecture, what information is provided by the PGW-C to the PGW-U for enforcing APN-AMBR across all IP-CAN sessions of a UE to the same APN?
Option 1: ARP Priority Level and QCI
Option 2: GBR Value and MBR Value for each bearer
Option 3: APN-AMBR value along with a QoS Enforcement Rule correlation ID
Option 4: Transport Level Packet Marking and TDF Session MBR Value
Explanation: In the context of Control and User Plane Separation (CUPS) for EPC nodes, the PGW-C needs to ensure the PGW-U can enforce the Aggregate Maximum Bit Rate (APN-AMBR) for all IP-CAN sessions of a UE connected to the same APN. The PGW-C provides the APN-AMBR value and a QoS Enforcement Rule correlation ID to the PGW-U, enabling identification and application of correct QoS rules across relevant sessions, ensuring compliant traffic management as per the specified APN-AMBR.