Bitocast - A hybrid BitTorrent and IP Multicast content distribution solution
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Bitocast - A hybrid BitTorrent and IP Multicast content distribution solution

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In recent years we have observed an increased use of the Internet as a means for transmitting ...

In recent years we have observed an increased use of the Internet as a means for transmitting
large content. There have been several technology attempts to attack this problem, including
costly distribution networks and, more recently, peer to peer (P2P) protocols. Amongst
these P2P protocols, BitTorrent has proven itself as an effective means for transmitting large
content items and today enjoys great popularity.
Numerous researchers have analyzed BitTorrent and proposed concepts and models to enhance
its reliability, efficiency and fairness. Further, there are proposals to extend BitTorrent
to support on-demand multimedia streaming. In this Dissertation we present Bitocast, a
content distribution system that combines IP Multicast and BitTorrent protocols in order to
achieve a more efficient usage of an Internet Service Provider’s network and reduce download
time when serving large sets of contents to large audiences.

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  • 1. A hybrid Bittorrent and IP Multicast content distribution solution Tiago Andrade e Silva
  • 2. Motivation Solution Results
  • 3. Motivation Solution Results
  • 4. http and www are a But not fit for file
  • 5.                                                                                                                                                                                                                                                                                               Without CDN with CDN
  • 6. Internet Protocol Distribution in 2004 Peer to Peer 60% Web 30% Other 6% Email 3% FTP 1% 2006 CacheLogic Research
  • 7. Parkinson’s law Content expands to fill the bandwidth available for its distribution
  • 8. + = Bitocast
  • 9. Motivation Solution Results
  • 10. Torrent Tracker @ 2005 How Stuff Works
  • 11. Multicast Unicast
  • 12. +
  • 13. Piece Model Channels: A,B,C,D,E
  • 14. Scheduler Model
  • 15. Have Message
  • 16. Motivation Solution Results
  • 17. Successfull downloads Bittorrent Bitocast 512:256:100 1024:256:100 1024:512:100 2048:512:100
  • 18. Scheduler Models ROUNDROBIN RANDOM RAREST BitTorrent Average Finished Nodes 1024 kbps up / 512 Kbpd down
  • 19. Piece Models FULL INTERVAL MULTIPLES BitTorrent Average Finished Nodes 1024 kbps up / 512 Kbpd down
  • 20. +
  • 21. In Bitocast some waste is produced
  • 22. Cooperative mode 50% decreased waste 20% increased download time
  • 23. BC
  • 24. + = Bitocast