节点与链路协作的动态虚拟光网络映射算法  

Dynamic virtual optical network mapping algorithm with cooperation between nodes and links

作　　者：杨帆[1] 秦帅 徐展琦[1] 马涛[1] 丁喆[1] YANG Fan;QIN Shuai;XU Zhanqit;MA Tao;DING Zhe(State Key Lab.of Integrated Service Networks,Xidian Univ.,Xi’an 710071,China)

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2018年第4期63-68,共6页Journal of Xidian University

基　　金：国家自然科学基金资助项目(61572391)

摘　　要：针对如何使逻辑上相互隔离的多个动态虚拟光网络高效地共享底层弹性光网络资源问题,提出了节点与链路协作的动态虚拟光网络映射算法.该算法在进行节点映射时不仅考虑了节点的计算容量、频谱资源以及要映射节点和已映射节点的对应关系,而且在节点映射的阶段就考虑了链路映射,将一个虚拟节点的相邻虚拟节点就近映射到一个物理节点的周围,做到了节点与链路的协作,从而避免了链路映射时使用长跳的物理路径.仿真结果表明,该算法在业务的阻塞率和链路利用率方面都有了明显的改善,可有效地节约网络资源.A dynamic virtual optical network mapping algorithm based on nodes and links cooperation is proposed to make multiple dynamic virtual optical networks which are logically isolated to efficiently share the underlying elastic optical network resources.The computational capacity of the node,the spectrum resource and the relationship between the nodes to be mapped and the nodes mapped are considered during node mapping in this algorithm.When virtual nodes are mapped into the physical nodes,link mapping is considered.The virtual nodes around a virtual node are mapped into the nodes around a physical node.The method uses the cooperation between nodes and links to avoid long hop physical routes during link mapping.Simulation results show that the performance of the blocking ratio and link utilization of the algorithm are significantly improved.This algorithm can save the network resource effectively.

关 键 词：虚拟光网络 弹性光网络 虚拟光网络映射 协作 

分 类 号：TN915[电子电信—通信与信息系统]