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首页> 外文期刊>Journal of network and computer applications >A hierarchical overlay with cluster-based reputation tree for dynamic peer-to-peer systems
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A hierarchical overlay with cluster-based reputation tree for dynamic peer-to-peer systems

机译：用于动态对等系统的基于群集的信誉树的分层覆盖

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摘要

Traditional peer-to-peer technologies and systems assume that people operate with desktop computers in fixed broadband networks. When people with modern mobile devices now access Internet and Web services much in the manner they used to on desktop computers, the classical peer-to-peer overlay models can be vulnerable in wireless and mobile networks. This paper proposes a hierarchical overlay architecture based on partially central and semi-structured overlay models for the deployment of peer-to-peer systems in dynamic network environments. To keep up system scalability and efficacy, this architecture design exploits peer locality and network proximity, and contends with several problems of peer churn, peer mobility, search redundancy and traffic overhead that become much stickier in dynamic network environments. This design also integrates the reputation notion to mitigate the free-riding problem in peer-to-peer systems. According to a special cluster-based reputation tree, the hierarchical overlay is adjustable to moderate unfair or imbalanced resource utilization over the system. Furthermore, the cluster hierarchy is resilient to any points of failure at peer clusters in the overlay topology. Therefore, the effort of this study achieves an efficient and robust overlay architecture in dynamic network environments. Simulation results show that the proposed architecture is not only scalable to peer population, but also sustainable to peer- and network-initiated dynamics and influences in peer-to-peer systems.
机译：传统的点对点技术和系统假定人们使用固定宽带网络中的台式计算机进行操作。当拥有现代移动设备的人们现在以与台式计算机上相同的方式访问Internet和Web服务时，传统的对等覆盖模型可能会在无线和移动网络中受到攻击。本文提出了一种基于部分中央和半结构化覆盖模型的分层覆盖体系结构，用于在动态网络环境中部署对等系统。为了保持系统的可伸缩性和效率，此体系结构设计利用对等体位置和网络邻近性，并解决了对等体流失，对等体移动性，搜索冗余和流量开销等问题，这些问题在动态网络环境中变得更加棘手。此设计还集成了信誉概念，以减轻对等系统中的搭便车问题。根据基于群集的特殊信誉树，可以调整分层覆盖以缓和系统上不公平或不平衡的资源利用率。此外，群集层次结构可以抵抗覆盖拓扑中对等群集的任何故障点。因此，本研究的努力在动态网络环境中实现了一种高效且健壮的覆盖体系结构。仿真结果表明，所提出的体系结构不仅可扩展到对等群体，而且对于对等和网络发起的动态和对等系统中的影响也具有可持续性。

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