分布式WR-OBS中并行组装算法的分析  

Performance Analysis for Parallel Burst-Assembly Mechanism in Distributed WR-OBS Network

作　　者：余周军[1] 蓝洲[1] 伍剑[1] 林金桐[1] 

机构地区：[1]北京邮电大学光波与光技术实验室,北京100876

出　　处：《北京邮电大学学报》2007年第1期105-109,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家"863计划"项目(2005AA122110)

摘　　要：为了提高分布式波长路由光突发交换(WR-OBS)网络的性能,提出了一种并行的组装算法.该算法根据对网络流量的预测,使突发帧组装过程和突发帧资源预约过程并发执行,与传统的波长路由光突发交换网络相比能极大降低网络的端到端时延.同时,该算法充分利用了波长路由中的双向预约机制,在轻网络负载的情况下可有效降低丢包率.对该算法下网络的TCP性能进行了分析,仿真结果表明,该算法可以有效改善网络的TCP性能.To improve performance of distributed control wavelength-routed optical burst switching （WR-OBS） network, a novel parallel burst assembly algorithm based on Internet traffic estimation is proposed. In this algorithm burst assembly and resource reservation are implemented simultaneously. With this mechanism end-to-end delay introduced by burst assembly can be reduced with the time scale of several milliseconds to tens of milliseconds. Simulation result also shows that under light traffic load burst blocking probability can be reduced by 20 %. Furthermore, transmission control protocol performance with this algorithm is studied, and simulation result shows that a much better transmission control protocol performance can be achieved compared with traditional wavelength routed optical burst switching network.

关 键 词：光突发交换 丢包率 端到端时延 TCP性能 

分 类 号：TN929.53[电子电信—通信与信息系统]