业务自相似性对光突发交换调度算法影响分析

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。

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

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.