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EHSTCP：改进的高速TCP算法
  • ISSN号：0254-4164
  • 期刊名称：《计算机学报》
  • 时间：0
  • 分类：TP393[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术]
  • 作者机构：[1]燕山大学电气工程学院网络控制与生物信息研究中心,河北秦皇岛066004, [2]上海交通大学电子信息与电气工程学院自动化系,上海200240
  • 相关基金：本课题得到国家杰出青年基金（60525303）、国家自然科学基金（60404022）、河北省自然科学基金（F2005000390,F2006000270）资助.
作者： 龙承念[1], 杨会龙[1], 李欣[1], 关新平[2]
关键词： HSTCP, 拥塞控制, TCP, 包丢失, RTT不公平性, HSTCP, congestion control, TCP, packet loss, RTT unfairness
中文摘要：

TCP在高带宽时延积网络中不能获得良好的性能，主要表现为低的吞吐量和大的窗口震荡．HSTCP算法解决了传统TCP算法在高带宽时延积网络下的性能瓶颈，但HSTCP在拥塞点时会产生大量的数据包丢失，同时当队列管理为去尾算法时，存在着严重的RTT不公平性问题．针对HSTCP算法的性能缺陷，该文提出一种在拥塞避免阶段进行拥塞避免模式切换的改进算法，称为EHSTCP．基于拥塞窗口历史值的端到端可用带宽预测方法，利用拥塞窗口历史信息来判断拥塞避免切换点．同时引入RTT公平因子，消除了HSTCP的RTT不公平性问题．NS2仿真实验验证了算法的有效性．

英文摘要：

TCP doesn＇t perform well in high bandwidth-delay product networks, and its main limitations are low throughput and large oscillation of congestion window. HSTCP solves the primary limitations of regular TCP, but there exists large number of packet loss upon congestion epoch and serious RTT unfairness with drop-tail gateway. To overcome the above deficiency, this paper proposes an improved algorithm, called EHSTCP, which switches between two congestion avoidance modes in congestion avoidance phase. To locate the switch point, this paper presents a new prediction method for end-to-end available bandwidth using history congestion window dynamics. Simultaneously, it introduces the RTT fairness factor to eliminate the serious RTT unfairness in HSTCP. NS2 simulation results validate the effectiveness of the proposed scheme.

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期刊信息
  • 《计算机学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国计算机学会 中国科学院计算技术研究所
  • 主编：孙凝晖
  • 地址：北京中关村科学院南路6号
  • 邮编：100190
  • 邮箱：cjc@ict.ac.cn
  • 电话：010-62620695
  • 国际标准刊号：ISSN：0254-4164
  • 国内统一刊号：ISSN：11-1826/TP
  • 邮发代号:2-833
  • 获奖情况:
  • 中国期刊方阵“双效”期刊
  • 国内外数据库收录:
  • 美国数学评论（网络版）,荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:48433