基于网络资源虚拟化的集成式虚拟光网络映射机制研究

Research on Integrated Virtual Optical Network Embedding Scheme on Network Resource Virtualization

光网络虚拟化技术可以为多个高性能的网络应用提供专用的网络资源,是一种光网络资源配置的有效共享机制.本文提出了一种新颖的集成式虚拟光网络映射iVONE机制,其中节点映射和链路映射以集成方式交错执行.这与现有的分步式VONE方案完全不同,即在节点映射完成之后再执行链路映射.而且,在光网络资源可虚拟化的平台上,我们也设计了一种新颖的路由,频谱,子载波和调制器分配RMS2A算法,来为虚拟链路建立光路.通过仿真证明了,所提出的算法比现有的分步式VONE算法在堵塞率上具有更好的性能,此外还对网络性能的影响因素进行了研究.

Optical network virtualization can provide a dedicated virtual optical network (VON) for high-performance network application,and can provide an effective mechanism for resource sharing. In this paper,we first proposed a novel integrated virtual optical network embedding (iVONE) scheme,where the node mapping and link mapping are performed in an integrated way.It is completely different from all existing two-phased VONE schemes,where the node mapping is performed before the link mapping.In addition,over resource-virtualized elastic optical networks (EONs),a novel routing,spectrum,subcarrier and modulator allocation (RMS^2 A) algorithm is designed to establish lightpaths for the virtual link mapping.The simulation demonstrates that our proposed iVONE algorithm has better performance than the existing two-phased VONE algorithm and the influence factors on network performance are also been studied.