Implementing Mechanisms and TCP Performance in DiffServ Capable IP Networks

LONG Ke-ping; BAI Gang; CHENG Shi-duan; CHEN Jun-liang; ZHANG Run-tong

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Implementing Mechanisms and TCP Performance in DiffServ Capable IP Networks

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- Implementing Mechanisms and TCP Performance in DiffServ Capable IP Networks
- Acta Electronica Sinica Vol. 29, Issue 11, Pages: 1540-1545(2001)
- 作者机构：
  
  1. 澳大利亚墨尔本大学,ARC超亮带信息网研究中心
  2. 北京邮电大学程控交换与通信网国家重点实验室,北京,100876
  3. Nokia北京研究开发中心,北京,100013
  4. 澳大利亚墨尔本大学ARC超亮带信息网研究中心
  5. 北京邮电大学程控交换与通信网国家重点实验室北京,100876
  6. Nokia北京研究开发中心北京,100013
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN915.04
- Published：2001
- 稿件说明：
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LONG Ke-ping, BAI Gang, CHENG Shi-duan, et al. Implementing Mechanisms and TCP Performance in DiffServ Capable IP Networks[J]. Acta Electronica Sinica, 2001, 29(11): 1540-1545.
DOI：

LONG Ke-ping, BAI Gang, CHENG Shi-duan, et al. Implementing Mechanisms and TCP Performance in DiffServ Capable IP Networks[J]. Acta Electronica Sinica, 2001, 29(11): 1540-1545. DOI：

摘要

本文首先对区分服务(DiffServ)结构中的边缘路由器和核心路由器机制进行了系统的分类研究

分析并比较了各种机制.接着

对区分服务结构中TCP的性能问题进行了研究

总结了国内外对这一问题的仿真、解析模型分析和实验研究的成果.找出了关键的问题所在

并根据我们的研究成果提出了一些区分服务结构本身的改进建议.

Abstract

Firstly

the Diffserv QoS architecture and various edge router marking mechanisms and core router drop mechanisms are discussed in detail.Secondly

This paper examines the several analytic model studies and many simulations on TCP(Transport control protocol) performance in DiffServ Capable IP(Internet protocol) networks.Through analysis

we find that TCP flow using current DiffServ AF PHB can't always achieve assured rate whether by srTCM/trTCM or by TSWTCM.The factors that influence TCP performance are:RTT

target rate

TCP/UDP coexistence and the number of flows in aggregate.What wrong with DiffServ and TCP?We conclude that current DiffServ architecture needs to be enhanced and some per-flow state must be maintained to provide predictive fair service for TCP flows.

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