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Analysis of Block-Aware Peer Adaptations in Substream-Based P2P

  • Chamil Kulatunga
  • Dmitri Botvich
  • Sasitharan Balasubramaniam
  • William Donnelly
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 66)

Abstract

Peer-to-Peer (P2P) video delivery using substreams supports uplink heterogeneities of the peers and hence could optimise sharing capabilities with minimum free-riding peers. Therefore, substream-based applications such as PPLive and CoolStreaming have been well accepted after successful deployments in the public Internet. In this approach, a child peer can find a parent peer for a substream independent of the other parent peers that it receives the remaining substreams. In general, there can be more than one substream between a parent and a child. The block-aware adaptation algorithm in CoolStreaming changes the parent peer for all such substreams when a child peer experiences poor performance even on one of its substreams from the parent. However, lagging of one substream in such a scenario is likely while others are not affected, when the parent receives its substreams through multiple paths. We propose a fine-grained approach (changing substream by substream) in peer adaptations to improve overlay network performance. This approach will in turn, is designed also to minimise the diversity of parents at a child peer by attempting to join with a well-performing another parent, which is expected to curtail complexities in a network-assisted P2P framework.

Keywords

Video streaming substream-based P2P child-initiated block-aware peer adaptation 

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Copyright information

© ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering 2012

Authors and Affiliations

  • Chamil Kulatunga
    • 1
  • Dmitri Botvich
    • 1
  • Sasitharan Balasubramaniam
    • 1
  • William Donnelly
    • 1
  1. 1.Telecommunications Software and Systems GroupWaterford Institute of TechnologyWaterfordIreland

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