• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

计算机工程与科学

• 计算机网络与信息安全 • 上一篇    下一篇

P2P流媒体网络的关键节点识别算法

龙军1,2,王宇楼1,2,袁鑫攀3,张华超1,2   

  1. (1.中南大学信息科学与工程学院,湖南 长沙 410083;
    2.中南大学网络资源管理与可信评估湖南省重点实验室,湖南 长沙 410083;
    3.湖南工业大学计算机学院,湖南 株洲 412000)
  • 收稿日期:2017-11-22 修回日期:2018-03-20 出版日期:2019-01-25 发布日期:2019-01-25
  • 基金资助:

    国家自然科学基金(S1651002,61402165);湖南省重点研发计划(2016JC2018)

A key node identification  algorithm in P2P streaming networks

LONG Jun1,2,WANG Yulou1,2,YUAN Xinpan3,ZHANG Huachao1,2   

  1. (1.School of Information Science and Engineering,Central South University,Changsha 410083;
    2.Network Resources Management and Trust Evaluation Key Laboratory of Hunan Province,Changsha 410083;
    3.School of Computer,Hunan University of Technology,Zhuzhou 412000,China)
  • Received:2017-11-22 Revised:2018-03-20 Online:2019-01-25 Published:2019-01-25

摘要:

P2P流媒体网络中普遍存在一些关键节点,关键节点对网络的安全和通信性能起着重要作用,识别网络中的关键节点尤为重要,而传统方法对于大规模网络的关键节点识别时间开销很大,无法保证实时性。提出P2P流媒体网络中的关键节点识别算法,结合混合模式的网络结构特点,
采用分区域的计算模型解决网络规模过大造成的巨大时间开销问题,根据节点的贡献度和传播能力差异定量化描述节点的重要性程度。仿真结果表明,所提算法可以快速获得节点重要性排序,有效识别P2P流媒体网络中的关键节点。
 

关键词: 流媒体, P2P, 网络拓扑, 混合模式, 关键节点

Abstract:

There are some key nodes in P2P streaming networks, which play an important role in network security and network communication. So identifying key nodes in the network is very crucial. The traditional method has huge time overhead for key node identification in largescale networks and cannot guarantee realtime performance. We propose a key node identification algorithm in P2P streaming media networks. Combining with the network structure characteristics of the hybrid mode, we use a regionbased computing model to solve the huge timeconsumption problem caused by the excessive network scale. The importance of nodes is quantitatively described according to the contribution and propagation capacity of nodes. Simulation results show that the proposed algorithm can quickly obtain the results of node importance ranking and effectively identify the key nodes in P2P streaming networks.
 

Key words: streaming, P2P, network topology, hybrid mode, key node