静态和动态交换相结合的多粒度光交叉连接的新型结构

为了降低光网络中光开关矩阵的复杂度,减少交换端口的数目,降低网络阻塞率,提出了一种新型的可以同时支持静态和动态光交换的多粒度光交叉连接(MG-OXC)结构;采用新型路由选择和波长分配(RWA)算法,提出了支持这种多粒度光交换网络的整数线性规划(ILP)模型.实验结果表明,当网络负载较低时,这种新型的MG-OXC网络的阻塞率会大大低于传统的使用最短波长路由和随机波长选择策略的多层和单层MG-OXC;当网络负载相对较高时,这几种MG-OXC网络的阻塞率基本相同.这种模型不仅适用于新型的MG-OXC网络,也适用于传统的MG-OXC网络,有较强的兼容性.

Novel Structure of Multi-Granularity OXC Combining Static and Dynamic Optical Switching

To reduce the complexity of the switching matrix and the number of the switching ports without increasing the network blocking probability,the paper proposed a novel structure of(MG-)OXC(Multi-Granularity Optical Cross Connect) that can support both the static and dynamic optical switching.the ILP model is derived to describe the multi-granularity switching optical network.The paper also proposed a novel routing and wavelength assignment algorithm for dealing with multi-granularity traffic in optical network that was set up by this kind of novel(MG-)OXC.It is shown that when the network load is low,the network blocking probability of the novel MG-OXC will be quite lower than the ordinary multi-layer and single-layer MG-OXC with the strategy of the shortest wavelength path and random choice of the wavelength.However,when the network load is comparatively higher,the network blocking probabilities of these structures are more or less the same.This model is applicable not only to the novel MG-OXC,but also to the traditional MG-OXC network.