Question: In Multimedia Broadcast/Multicast Service (MBMS), how is the "Framerate_Deviation" metric value calculated for the "3GPP-QoE-Metrics" attribute?
Option 1: Actual playback frame rate plus the pre-defined frame rate value (FR)
Option 2: Pre-defined frame rate value (FR) minus the actual playback frame rate
Option 3: Actual playback frame rate divided by the pre-defined frame rate value (FR)
Option 4: Pre-defined frame rate value (FR) multiplied by the actual playback frame rate
Explanation: The correct calculation for "Framerate_Deviation" is the difference between the expected and actual frame rates, which is essential for assessing Quality of Experience (QoE) in MBMS. By subtracting the actual playback frame rate from the pre-defined frame rate value (FR), the metric provides insight into any deviations, whether positive or negative, aiding in the evaluation of service performance. This calculation directly impacts how network operators and content providers understand and optimize video streaming quality over mobile networks.