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基于人工社会网络的P2P实时流媒体协助分发模型

卢良进 万健 徐向华   

  1. 杭州电子科技大学 杭州电子科技大学 杭州电子科技大学
  • 收稿日期:2007-05-25 修回日期:1900-01-01 发布日期:2007-11-01 出版日期:2007-11-01
  • 通讯作者: 卢良进

Assisting delivery model for peer-to-peer live streaming media based on artificial social-network

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  • Received:2007-05-25 Revised:1900-01-01 Online:2007-11-01 Published:2007-11-01
  • Contact: Liang-Jin Lu

摘要: 分析了现有P2P流媒体分发模型存在的问题,提出了一种跨节目的协助分发模型。该模型通过人工社会网络把合作节点的范围从单个节目扩展到全局覆盖网络,在节点间建立持久的信任与合作关系,充分利用空闲带宽以主动和被动两种协助方式提高播放流畅度,并引入TitforTat机制激励节点参与协助。实验结果表明该模型能进一步提高服务质量。

关键词: P2P, 流媒体, 人工社会网络, 协助

Abstract: The problems of the existing P2P streaming models were analyzed. An inter-channel assisting delivery model was proposed. It extended the scope of cooperation from one program to the global overlay, and maintained persistent trust and cooperation relationship between peers by the artificial social network. It made full use of the free bandwidth to improve the play fluency by active assistance and passive assistance. A Tit-for-Tat mechanism was introduced to stimulate peers to help each other. The simulation results show that it can improve the QoS efficiently.

Key words: P2P, streaming media, artificial social network, assistance