| 区分服务结构及其TCP性能分析 |
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| 引用本文： | 隆克平,白刚,程时端,陈俊亮,张润彤. 区分服务结构及其TCP性能分析[J]. 电子学报, 2001, 29(11): 1540-1545 |
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| 作者姓名： | 隆克平 白刚 程时端 陈俊亮 张润彤 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金项目 (No.69972 0 0 8)和Nokia- BUPT合作项目联合资助 |
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| 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.
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| 关 键 词： | 服务质量 区分服务 标记器 主动队列管理 TCP性能 |
| 文章编号： | 0372-2112(2001)11-1540-06 |
Implementing Mechanisms and TCP Performance in DiffServ Capable IP Networks |
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| LONG Ke-ping ,,BAI Gang ,CHENG Shi-duan ,CHEN Jun-liang ,ZHANG Run-tong. Implementing Mechanisms and TCP Performance in DiffServ Capable IP Networks[J]. Acta Electronica Sinica, 2001, 29(11): 1540-1545 |
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| Authors: | LONG Ke-ping BAI Gang CHENG Shi-duan CHEN Jun-liang ZHANG Run-tong |
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| Affiliation: | 1. ARC Special Research Centre for Ultra Broadband Information Networks (CUBIN),Department of Electrical and Electronic Engineering,The University of Melbourne;2. Beijing University of Posts & Telecommunications(BUPT), Beijing 100876,China;3. Nokia China R&D Center,No.11,He Ping Li Dong Jie,Beijing 100013,China |
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| 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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| Keywords: | QoS diffServ marker active queue management TCP performance |
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