HyCloud: A system for device-to-device content distribution controlled by the cloud

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


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.


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

What is it about

saving cellular data



Detailed architecture

mobile and cloud part

mobile devices subscribeto channels

recording service prepare content in form of chunks

dissemination service controls distribution


Distribution phases


Video dissemination strategy

playing buffered partially buffered not buffered


Automated testing

measuring dissemination for up to 16 devices considering 3 dissemination strategies utilization of cloud can improve efficiency


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


Practical experiment - results

24% bandwidth saved

38% at peak

graphs for individualphones


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


Thank you for your attention

Questions?

HyCloud: A system for device-to-device content distribution controlled by the cloud

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