一种适用于光突发交换网络的TCP性能分析模型  

Modeling TCP performance in optical burst switching

作　　者：刘建平[1] 刘增基[1] 文爱军[1] 

机构地区：[1]西安电子科技大学综合业务网理论与关键技术国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2006年第4期529-534,共6页Journal of Xidian University

基　　金：国家自然科学基金重大研究计划面上项目资助(90104012)

摘　　要：针对光突发交换网络的特殊传送方式,提出了一种稳态连接条件下TCP的吞吐量模型;该模型采用统计的方法,综合考虑了突发组装和突发丢失的因素,分析了突发所包含同一连接TCP分组数对TCP吞吐量性能的影响,得到了一个吞吐量与突发丢失率、突发包含TCP/IP分组数及往返时延的闭合表达式,并通过仿真验证了模型的正确性.分析和仿真结果表明突发所包含TCP/IP分组数存在一个最佳临界值,使吞吐量达到最大.Optical burst switching （OBS） is a promising paradigm for the next-generation Internet infrastructure. This paper proposes a simple model of TCP performance in the OBS network. By analyzing the interaction between TCP congestion control mechanism and OBS-specific mechanisms such as burst assembly and buffer-less burst switching, our model quantitatively characterizes TCP throughput as a function of the number of TCP/IP packets assembled in one burst, the burst drop rate and the roundtrip time. The model is validated through a number of simulations. Theoretical and simulation results show that there is an optimal number of TCP/IP packet assembled in one burst, which results in maximum throughout.

关 键 词：光突发交换 TCP协议 突发汇聚 吞吐量模型 

分 类 号：TN929.11[电子电信—通信与信息系统]