1 / 8 network characteristics of video streaming traffic ashwin rao, yeon-sup lim, chadi barakat,...
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Network Characteristics of Video Streaming Traffic
Ashwin Rao, Yeon-sup Lim, Chadi Barakat,
Arnaud Legout, Don Towsley, and Walid Dabbous
INRIA Project PlaneteSophia Antipolis
Univ. of Massachusetts
Amherst
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Video Streaming in the Internet
20% to 40 % of Internet Traffic
Adobe Flash
HTML5 Microsoft SilverlightContainers
Desktop Browsers Mobile Applications
Internet Explorer
Firefox Chrome iOS (native)
Android (native)
What are the Network Characteristics of Video Streaming Traffic ?
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Generic Behavior of Video StreamingD
ownl
oad
Am
ount
Time
Buf
ferin
gBlock Size
On
Off
Steady State
Average rate
during steady state
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Streaming Strategies Identified
No On Off Cycles
Long On Off Cycles Short On Off Cycles
OFF OFF
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Streaming Strategies Used
Service YouTube Netflix
Container Flash HTML5 Silverlight
IE 9 Short Short Short
Firefox Short No Short
Chrome Short Long Short
iOS (native) - Based on encoding rate
Short
Android (native)
- Long Long
Streaming strategy depends on typeof application and container
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Streaming Strategies Comparison
No On Off Long On Off Short On Off
Engineering
Complexity
No Complex
Engineering
Explicit support on server or client side
TCP Friendly Yes – TCP File Transfer
Yes – periodic File Transfer
Unknown traffic not ack-
clocked
Receive buffer occupancy
Large Moderate Small
Unused bytes on user interruptions
Large amount
Moderate amount
Small amount
StrategyMetric
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Open Questions for the CCN community
• Should CCN nodes be aware of the underlying streaming strategy?
• What is the optimal streaming strategy for CCN?
• Is there an optimal caching strategy for a given streaming strategy?
• What is the impact of user interruptions due to lack of interest on CCN caches?
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BACKUPS
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YouTube Streaming StrategiesContainer Flash HTML5
Application Any Web
Browser
IE 9 Firefox Google Chrome
iOS (native)
Android (native)
Strategy Short Short No Long Depends Long
Buffering Amount
40 s Up to 15 MB
Video Size
Up to 15 MB
40 s of playback or up to 20 MB
Up to 10 MB
Block Size 64 kB 256 kB
NA 5 MB to 8 MB
64 kB 2 MB to 8 MB
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Open Questions for CCN community
• Should CCN nodes be aware of the underlying streaming strategy?
• What is the optimal streaming strategy for CCN?
• Is there an optimal caching strategy for a given streaming strategy?
• What is the impact of user interruptions due to lack of interest?
[email protected]@inria.fr
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Netflix Streaming StrategiesContainer Silverlight Silverlight for Mobile
Devices?
Application Any Web Browser
iOS (native) Android (native)
Strategy Short Short Long
Buffering
Amount
30 MB to 150 MB
10 to 20 MB 35 to 45 MB
Block Size 0.5 MB to 2 MB
0.5 to 3 MB 4.5 to 6 MB
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Data Set and Locations
YouTube NetFlix
Desktop Mobile Desktop Mobile
5000 Flash,
3000 HTML5,
2000 HD
50 200 50
2 Sites in France and
2 Sites in USA
2 Sites in USA
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Conclusions
• Streaming Strategy depends on browser and container• Migration from one strategy to another can have a non-
negligible impact
Raw File Transfer
vs
Periodic Buffering
vs
No ack-clock
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