| 一种改进的NEMO协议 |
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| 引用本文： | 张晴,禹继国.一种改进的NEMO协议[J].微机发展,2010(7):98-101,105. |
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| 作者姓名： | 张晴 禹继国 |
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| 作者单位： | 曲阜师范大学计算机科学学院,山东日照276826 |
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| 基金项目： | 国家自然科学基金（10471078）; 山东省中青年科学家奖励基金（2005BS01016）; 山东省科技攻关计划（2009GG10001014）; 山东省教育厅科研项目（J07WH05） |
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| 摘 要： | NEMO协议在组播过程中没有利用层次结构最底层的节点,并且在选择簇首时也没有考虑到节点异构性。针对这些问题,提出了一种改进的NEMO协议。改进的NEMO协议通过分簇技术充分利用了最底层的节点,避免了P2P覆盖网络中的搭便车现象,并且在选择簇首时考虑了节点的异构性。每一个簇首根据簇中剩余节点的能力选择一些节点作为辅助领导节点,当簇首失效时,就从这些辅助领导节点中选择能力最大的节点作为新的簇首,从而提高了覆盖网络的容错性。仿真表明,改进后的NEMO协议在平均传递延迟和节点失效时的代价方面要优于原始的NEMO协议。
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| 关 键 词： | NEMO协议 改进的NEMO协议 搭便车现象 P2P覆盖网络 |
An Enhanced NEMO Protocol |
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| ZHANG Qing,YU Ji-guo.An Enhanced NEMO Protocol[J].Microcomputer Development,2010(7):98-101,105. |
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| Authors: | ZHANG Qing YU Ji-guo |
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| Affiliation: | (Department of Computer,Qufu Normal University,Rizhao 276826,China) |
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| Abstract: | NEMO protocol doesn＇t make use of the nodes at the bottom layer of hierarchy,and doesn＇t consider node heterogeneity when selecting cluster leaders.For these problems,an enhanced NEMO protocol has been proposed in this paper.The enhanced NEMO protocol makes full use of nodes at the bottom layer of hierarchy by clustering technology,so it can avoid free riding in P2P overlay.In addition,it considers node heterogeneity when selecting cluster leaders.Each cluster leader selects some peers according to their abilities in its cluster to be its co-leader.When the cluster leader fails,the co-leader who has the largest ability is selected to be the new cluster leader.In this way,can improve overlay network＇s resilience.The enhanced NEMO protocol is better than NEMO protocol in some aspects by analysis. |
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| Keywords: | NEMO protocol enhanced NEMO protocol free riding P2P overlay |
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