业务自相似性对光突发交换调度算法影响分析  

Performance Analysis of Scheduling Algorithm Based on Self-Similar Traffic in Optical Burst Switching Networks

作　　者：王汝言[1] 吴大鹏[2] 隆克平[3] 

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]北京邮电大学宽带通信网络实验室,北京100876 [3]电子科技大学通信与信息工程学院,成都610054

出　　处：《电子与信息学报》2008年第8期1989-1993,共5页Journal of Electronics & Information Technology

基　　金：国家杰出青年科学基金项目(NSFDYS-60725104);国家973计划项目(2007CB310706);国家863计划项目(2007AA01Z246);新世纪优秀人才支持计划;重庆市科委项目(2005AC2089);重庆市教委项目(KJ060508;KJ060513;KJ070513)资助课题

摘　　要：使用泊松业务流模型对光突发交换网络进行性能分析不能准确地反映网络状态。该文从理论上对突发包长度进行了推导,对基于时间门限汇聚机制下突发包数据流自相似程度进行了计算机仿真测量,并利用自相似业务流模型对光突发交换网络中比较常用的LAUC和LAUC-VF调度算法进行了性能仿真。仿真结果表明:基于时间门限的汇聚机制能够有效地降低数据流自相似程度,数据流的自相似特性对LAUC算法的影响并不非常明显,但对LAUC-VF算法的性能则产生了比较严重的影响,其突发包丢失率较泊松流平均增加了近3个百分点。Analysis on Optical Burst Switching（OBS）network performance based on the Poisson model would not be exactly. In this paper, the distribution of data burst length is researched, and it is simulated that the self-similarity of data burst traffic assembled by time-based mechanism, moreover, the performance of LAUC and LAUC-VF are shown in the simulations. Simulation and theoretical results show that the assembly mechanism based on time threshold can decrease the traffic＇s self-similarity, on the other hand, the influence of self-similarity on LAUC is small, but much greater on LAUC-VF whose burst drop probability will be decreased by 3 percent than Poisson stream.

关 键 词：光突发交换 自相似业务 调度算法 

分 类 号：TN915.63[电子电信—通信与信息系统]