摘要
虚拟网络的映射策略影响弹性光网络(EON)资源可用性和网络生存性。该文提出一种基于节点间距离和频谱离散度感知的虚拟光网络生存性协同映射(CM-DSDA)算法,研究节点计算资源和拓扑位置中介性的光节点排序策略,设计频谱离散度方法评价链路频谱碎片化程度。在虚拟链路的生存性映射中,选择邻接已映射节点中消耗频隙数少且频谱离散度低的工作光路和保护光路协同映射虚拟网络。仿真结果表明所提算法能有效地提高EON的频谱占用率和减少带宽阻塞率。
The mapping strategy of virtual network has important effect on the resource availability and survivability of the Elastic Optical Network(EON).A survivable virtual optical network Coordinated Mapping based on the Distance and Spectrum Dispersion Awareness(CM-DSDA)between nodes is proposed in the paper.A physical node weighted sorting strategy is studied,which not only considers the number of physical node computing resources,but also considers the location centrality of the physical nodes in the EON topology.And a method of spectrum dispersion is designed to evaluate the link’s spectrum fragmentation.During the virtual link’s survivability mapping,the working and protection optical paths adjacent the position of the mapped physical nodes with the minimum number of spectrum usage and the lowest frequency spectrum dispersion are selected to coordinated mapping the virtual optical networks.Simulation results show that the CM-DSDA can effectively increase the EON’s spectrum utilization and reduce bandwidth blocking probability.
作者
刘焕淋
胡会霞
陈勇
温濛
王展鹏
LIU Huanlin;HU Huixia;CHEN Yong;WEN Meng;WANG Zhanpeng(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;School of Automation,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)
出处
《电子与信息学报》
EI
CSCD
北大核心
2020年第9期2166-2172,共7页
Journal of Electronics & Information Technology
基金
国家自然科学基金(51977021)
重庆市科技局自然科学基金(CSTC2019jcyj-msxmX0613)。
关键词
虚拟光网络
生存性协同映射
节点中介性
频谱离散度
频谱占用率
Virtual optical network
Survivable coordinated mapping
Node centrality
Spectrum dispersion
Spectrum usage ratio
作者简介
通信作者:刘焕淋,liuhl2@sina.com。
