计算机工程与应用 ›› 2009, Vol. 45 ›› Issue (31): 109-110.DOI: 10.3778/j.issn.1002-8331.2009.31.032

• 网络、通信、安全 • 上一篇    下一篇

网络中时延受限的代理服务器放置问题

刘建贞,杨建芳   

  1. 杭州电子科技大学 运筹与控制研究所,杭州 310018
  • 收稿日期:2009-04-15 修回日期:2009-07-02 出版日期:2009-11-01 发布日期:2009-11-01
  • 通讯作者: 刘建贞

Delay constrained Web proxy problem in Internet

LIU Jian-zhen,YANG Jian-fang   

  1. Institute of Operational Research and Cybernetics,Hangzhou Dianzi University,Hangzhou 310018,China
  • Received:2009-04-15 Revised:2009-07-02 Online:2009-11-01 Published:2009-11-01
  • Contact: LIU Jian-zhen

摘要: 该文考虑网络数据更新,需要控制代理服务器与客户的距离时,网络中的代理服务器的放置问题。找到代理服务器的最优数量和放置位置,使网络中数据访问的总花费(包括数据读取和更新)最小。利用二叉树结构和动态规划方法,得到了一个时间复杂度On2)的多项式时间算法,其中n为网络结点数。

关键词: 代理服务器, 二叉树, 动态规划, 时延约束

Abstract: The paper discusses the Web proxy location problem with consideration of both read and update operations to the data on the Internet when controlling the distance between the Web proxies and the server and finds the optimal number of proxies and their placement,such that the overall access cost is minimized.An algorithm with time complexity On2) is gotten which uses binary tree and the dynamic programming,where n is the number of nodes in the net.

Key words: proxy, binary tree, dynamic programming, delay restraint

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