Have you heard about bufferbloat? Bufferbloat happens when network equipments buffer too many packets under congestion, causing undesirably high latency in the network.

In this talk, we will share our QoE observations based on our experiments with various router buffer size in our backbone routers and applying active queue management (AQM) in home routers. Our results show that when setting the router buffer size appropriately, we not only reduce latency (by 1 second on median), but we also greatly improve interruption rate (by 30%).

Settings inside network routers often seem unrelated from video quality, but in fact they have tremendous amount of impact on QoE. We hope this talk can draw more attention from the video community on the importance of router buffer management in various networks.

Presented at Demuxed 2019 in San Francisco.

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