一种适用于光突发交换网络的背景流量估计模型

A Cross Traffic Estimate Model for Optical Burst Switching Networks

平面背景流量的强度是光突发交换网络中的一个重要参数。该参数直接影响网络的性能并约束网络边缘节点的组装算法。指出了在配置波长转换器的情况下,核心节点控制平面的服务速率是与背景流量密切相关的随机变量而不是确定性变量。构建了M/D/1和一种特殊的M/G/1排队模型分别描述不同配置的核心节点的行为,并以剩余偏置时间为观测变量,构建了核心节点的背景流量估计模型。仿真和数值分析表明,该模型能够实时反映出核心节点控制平面的背景流量强度。

The cross traffic intensity of the optical burst switching networks is a key parameter m the network. This parameter restricts the operation of the assembly algorithm in edge nodes. It is revealed that the service time of the control plane in core nodes, closely related with the cross traffic, is a random variable instead of a deterministic variable in the wavelength conversion devices. Two distinct queuing models named M/D/1 and M/G/1 are constructed to describe the behavior of the core node. An estimate model to infer the cross traffic in the control plane of core nodes is proposed based on the observing variable of residual time of the burst. Numerical simulation results verify that the model can reflect the intensity of cross traffic on the control plane of core nodes in time.