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Mixed P2P-CDN System for Media Streaming in Mobile Environment

Mixed P2P-CDN System for Media Streaming in Mobile Environment. Speaker: Shao-Ci Jheng Advisor: Dr. Ho-Ting Wu 2014/05/05. Outline. Introduction Mixed CDN-P2P Network Architecture Peer schedule Algorithm of Mixed CDN-P2P System Performance Evaluation Conclusion References.

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Mixed P2P-CDN System for Media Streaming in Mobile Environment

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  1. Mixed P2P-CDN System for Media Streaming in Mobile Environment Speaker: Shao-CiJheng Advisor: Dr. Ho-Ting Wu 2014/05/05

  2. Outline • Introduction • Mixed CDN-P2P Network Architecture • Peer schedule Algorithm of Mixed CDN-P2P System • Performance Evaluation • Conclusion • References

  3. Introduction — P2P • Peer-to-Peer,P2P • Architecture : decentralized and distributed • Peers both suppliers and consumers of resources

  4. Introduction — P2P(Cont.)

  5. Introduction — CDN • Content Distribution Network ,CDN • Architecture :distributed system,Server-Client • Large distributed system of servers deployed in multiple data centers across the Internet.

  6. Introduction — CDN(Cont.)

  7. Mixed CDN-P2P Network Architecture

  8. Mixed CDN-P2P Network Architecture(Cont.)

  9. Mixed CDN-P2P Network Architecture(Cont.)

  10. Peer schedule Algorithm mixed CDN-P2P System • CDN replica peer(CDN surrogate server) • Media content is divided into segments, and distributed across over all the replica peers. • The locations of each segment are maintained in a list stored in all of the CDN replica peers.

  11. Peer schedule Algorithm mixed CDN-P2P System (Cont.) • Mobile peer sends request for playing media content to the nearest CDN replica peer. • CDN replica peer responses with a list of CDN replica peers that contains media content segments.

  12. Peer schedule Algorithm mixed CDN-P2P System (Cont.) • RTT value between the mobile and CDN replica peers was measured before selecting the candidate peers of the first segment.

  13. Peer schedule Algorithm mixed CDN-P2P System (Cont.) • The mobile peer sends control packet to the candidate peers and waited until a timeout occur. • If the first segment was able to receive within timeout, the process of requesting second segment starts immediately.

  14. Peer schedule Algorithm mixed CDN-P2P System (Cont.) • When CDN replica peer 1 failed to transmit segment to the mobile peer within the timeout, the mobile peer replace failed replica peer with a CDN replica peer 4 as one of the selected candidates. • Control packet was sent out to the selected candidate peers. The CDN replica peer 2 was selected to transmit second segment to the mobile peer because it has the lowest RTT among the selected candidates. • The rest of media content segments follow the same procedures as previously described.

  15. Peer schedule Algorithm mixed CDN-P2P System (Cont.)

  16. Performance Evaluation • Bandwidth • Mobile download : 40Mbps • CDN replica peer : 100Mbps • Video • Type : MPEG • Length : 4000 sec • Each CDN replica peer(20) • Store Content : 50 • Placed : round-robin(10) • Arrival rate : Poisson process • Popularities : Zipf-like distribution (α= 0.733)

  17. Performance Evaluation(Cont.)

  18. Performance Evaluation(Cont.)

  19. References • Shiann-TsongSheu , Dept. of Commun. Eng, Jhongli , Chi-Hao Huang,” Mixed P2P-CDN System for Media Streaming in Mobile Environment”, 2011 7th International on Wireless Communications and Mobile Computing Conference (IWCMC), 4-8 July 2011,pp.657 – 660 • Wiki, URL : http://en.wikipedia.org/wiki/Peer-to-peer URL : http://en.wikipedia.org/wiki/Content_delivery_network

  20. Thank you for listening.

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