hycloud: a system for device-to-device content distribution controlled by the cloud
TRANSCRIPT
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1ETH Zurich, Communication Systems Group
HyCloud: A system for device-to-device contentdistribution controlled by the cloud
Jiri Danihelka
Co-authors: Dr. Domenico Giustiniano, Dr. Theus Hossmann
ETH Zurich, Communication Systems Group
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2ETH Zurich, Communication Systems Group
Motivation – based on Cisco forecast study
3G cellular networks are going to be overloaded mobile data traffic: 78% annual growth rate (up to 2016) mobile connection speed: 56% annual growth (up to 2016)
53% of mobile data is video
We are looking for new ways how save bandwidth Mobile devices can share downloaded video
Offloading cellular traffic through opportunistic communications is a promising solution WiFi + Bluetooth
Delay tolerance allows applications to trade-off completion time for 3G usage.
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3ETH Zurich, Communication Systems Group
Use cases for video sharing
Video content live streaming of sport or cultural events watching televisions channels education video in class
Non-video content audio content RSS feeds, tweets, other news application updates
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What is it about
saving cellular data
4ETH Zurich, Communication Systems Group
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5ETH Zurich, Communication Systems Group
Detailed architecture
mobile and cloud part
mobile devices subscribeto channels
recording service prepare content in form of chunks
dissemination service controls distribution
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6ETH Zurich, Communication Systems Group
Distribution phases
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10ETH Zurich, Communication Systems Group
Video dissemination strategy
playing buffered partially buffered not buffered
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14ETH Zurich, Communication Systems Group
Automated testing
measuring dissemination for up to 16 devices considering 3 dissemination strategies utilization of cloud can improve efficiency
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15ETH Zurich, Communication Systems Group
Practical experiment - setup
Parameters 16 volunteers at the university measured during a work day WiFi downloads + Bluetooth dissemination
Instructions Take a mobile phone Run the application HyCloud Experiment Leave the application in foreground Keep the phone with you wherever you go
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16ETH Zurich, Communication Systems Group
Practical experiment - results
24% bandwidth saved
38% at peak
graphs for individualphones
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17ETH Zurich, Communication Systems Group
Conclusion
opportunistic video offloading can save significant amount of data traffic for popular content up to 40% for live video even more for less time-sensitive content
problems cannot be applied on all types of data downloads need better phone OS integration standardization and cross-platform usages
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18ETH Zurich, Communication Systems Group
Thank you for your attention
Questions?