Journal of Computer Applications

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Evaluation mechanism for preventing free-rider in super-node overlay

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  • Received:2007-09-10 Revised:1900-01-01 Online:2008-02-01 Published:2008-02-01
  • Contact: Jia-Qi Liu

超节点覆盖网中针对free-rider的用户评价机制

陈军 刘佳琦 陈志刚   

  1. 惠州学院 中南大学 中南大学
  • 通讯作者: 刘佳琦

Abstract: Most selections of super node in P2P super-node overlay are based on physical performance without considering free-riders, which affects the efficiency in real network. An evaluation mechanism was presented, which fully considered physical distance, information exchange frequency and degree of querying similarity. The satisfaction degree was proposed to select super node and the object to send querying request, not only to improve the system efficiency but also reduce even eliminate free-rider nodes. The experiments show that the evaluation mechanism improves the querying success rate, and decreases average querying hops and delay in P2P super-node overlay.

Key words: Super Node, Autonomous System, Evaluate Mechanism, Query Request

摘要: 针对P2P超节点覆盖网中超节点的选择大都根据节点物理性能而没有考虑搭便车(free-rider)等现象,充分考虑节点间距离、交互情况和查询相似度等提出了一种用户评价机制,根据满意度选择超节点和查询请求的发送对象,不仅可以提高系统效率,同时可以达到减少和消除free-rider节点的目的。实验分析表明,P2P超节点覆盖网用该评价机制提高了文件查询成功率,减少了平均查询跳数,且降低了文件查询延时。

关键词: 超节点, 自治域, 评价机制, 查询请求