Question: In a Policy and Charging Control (PCC) architecture, what is the primary purpose of the User-Location-Info-Time AVP when transmitted from the PCEF to the PCRF?
Option 1: To synchronize network clocks with UE-local time for billing purposes.
Option 2: To provide the UE's current location for emergency services.
Option 3: To inform the PCRF (and subsequently the AF) of the timestamp when the UE was last known to be in a specific location.
Option 4: To request location updates from the UE for mobility management.
Explanation: The User-Location-Info-Time AVP conveys the NTP time at which the UE was last known to be in a particular location, from PCEF to PCRF, and then to AF. This information is crucial for policy and charging decisions based on location and time.