Question: What is the primary purpose of the RAN-Secondary-RAT-Usage-Report AVP in Diameter charging applications?
Option 1: To report the volume count for both uplink and downlink in a secondary Radio Access Technology (RAT) for a bearer, including timestamps.
Option 2: To manage Quality of Service (QoS) parameters for primary RAT connections in a 5G network.
Option 3: To provide location updates for User Equipment (UE) in idle mode across different RATs.
Option 4: To authenticate UE for voice over LTE (VoLTE) services.
Explanation: The RAN-Secondary-RAT-Usage-Report AVP is specifically designed to report usage (volume count) for secondary Radio Access Technologies (RATs), distinguishing between uplink and downlink for a particular bearer, and includes relevant timestamps. This is crucial for accurate charging per IP-CAN session when multiple RATs are involved, reflecting the complex nature of modern telecommunications where seamless handovers between different access technologies occur.