Question: Under what condition(s) will the PCEF stop time measurement for a Monitoring Key if no packets are received, assuming an Inactivity Detection Time value is provided?
Option 1: Only when the Inactivity Detection Time value expires
Option 2: Immediately when usage monitoring is disabled, regardless of the Inactivity Detection Time
Option 3: Both when the Inactivity Detection Time value expires and when time-based usage monitoring is disabled before the time expires
Option 4: Never, as time measurement continues until an IP-CAN session is terminated
Explanation: Time measurement for a Monitoring Key stops under two conditions if no packets are received: (1) when the provided Inactivity Detection Time interval expires, and (2) when time-based usage monitoring is disabled before the Inactivity Detection Time is reached. This ensures flexibility in managing usage monitoring based on both inactivity periods and changes in monitoring requirements.