电子学报 ›› 2013, Vol. 41 ›› Issue (8): 1560-1568.DOI: 10.3969/j.issn.0372-2112.2013.08.017

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内容分发网络研究

李乔, 何慧, 张宏莉   

  1. 哈尔滨工业大学网络与信息安全研究中心, 黑龙江哈尔滨 150001
  • 收稿日期:2013-01-11 修回日期:2013-05-15 出版日期:2013-08-25
    • 通讯作者:
    • 李 乔
    • 作者简介:
    • 何 慧 女,博士,哈尔滨工业大学网络与信息安全研究中心副教授,主要研究方向为网络计算,网络安全.
    • 基金资助:
    • 国家863高技术研究发展计划 (No.2011AA010705); 国家973重点基础研究发展计划 (No.2011CB302605); 国家自然科学基金 (No.61173145,No.60203021)

Research on Content Delivery Networks

LI Qiao, HE Hui, ZHANG Hong-Li   

  1. Research Center of Network and Information Security, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
  • Received:2013-01-11 Revised:2013-05-15 Online:2013-08-25 Published:2013-08-25
    • Supported by:
    • National High-tech R&D Program of China  (863 Program) (No.2011AA010705); National Program on Key Basic Research Project of China  (973 Program) (No.2011CB302605); National Natural Science Foundation of China (No.61173145, No.60203021)

摘要: 内容分发网络是一种以降低互联网访问时延为目的,在网络边缘或核心交换区域部署内容代理服务,通过全局负载调度机制进行内容分发的新型覆盖网络体系.随着多媒体网络流及实时交互技术的兴起,现今内容分发网络已成为互联网的核心应用之一.本文介绍了内容分发网络的演变过程与体系结构,深入剖析了内容分发网络的核心功能组件与工作机制,对当前主流内容分发网络进行分类,并讨论了内容分发网络性能度量,最后探讨了内容分发网络的未来挑战与进一步研究方向.

关键词: 覆盖网络, 内容分发网络, 内容路由, 负载均衡, 性能测量

Abstract: CDN (Content Delivery Network) is a novel overlay network,which deploys surrogates on the edge or backbone of network in order to reduce the access delay;it improves the efficiency of content delivery on the global load balance component.In current status,CDN has been a core Internet application as the development of multimedia and network technologies.In this paper,the evolution of CDN and its architecture are introduced;the key component of CDN and mechanism are presented;the taxonomy of CDNs and the performance measured strategies are reviewed.The developing trends of CDN and further topics in this area are also analyzed.

Key words: overlay network, content delivery network, content routing, load balance, performance measure

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