| 区分服务链路中确保型数据流的性能分析 |
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| 引用本文： | 孟坤,朱翼隽.区分服务链路中确保型数据流的性能分析[J].成都信息工程学院学报,2009,24(2). |
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| 作者姓名： | 孟坤 朱翼隽 |
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| 作者单位： | 江苏大学理学院,江苏,镇江,212013 |
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| 摘 要： | 在区分服务(Differentiated services,DiffServ)体系结构中,确保型AF(Assured Forwarding)是一种根据相对带宽可用性和数据流丢弃特性定义的PHB(Per-Hop-Behavior).讨论了区分服务链路中AF组数据流在EF(Ex-peeIited Forwarding)组数据流影响下的带宽变化,以及网络节点对AF组数据流采用的WRED(weighted random early detecticm)缓存管理机制,提出一类基于随机环境且带有WRED缓存管理机制的排队模型.通过矩阵分析的方法得出稳态队长分布,并给出了平均队长、数据包丢失率,拥塞概率等性能指标,并结合数值例子验证了所提出排队模型的可行性.
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| 关 键 词： | 区分服务 性能分析 缓存管理机制 随机环境 排队 |
Performance evaluation of AF stream in differentiated services link |
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| MENG Kun,ZHU Yi-juan.Performance evaluation of AF stream in differentiated services link[J].Journal of Chengdu University of Information Technology,2009,24(2). |
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| Authors: | MENG Kun ZHU Yi-juan |
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| Institution: | MENG Kun,ZHU Yi-juan(Faculty of Science,Jiangsu University,Zhenjiang 212013,China) |
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| Abstract: | In the DiffServ(Differentiated Services) architecture the AF(Assured Forwarding) is a PHB(Per-Hoop-Behavior) defined according to the usability of the relative bandwidth and the drop characteristic of the data stream.The bandwidth change of the AF stream under the effect of the EF(Expedited Forwarding) stream on the DiffServ link and the WRED(Weighted Random Early Detection) buffer management mechanism adopted by the network node are discussed.A queuing model based on the random environment and with the WRE... |
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| Keywords: | DiffServ performance evaluation buffer management mechanism random environment queuing |
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