胡会霞1,
陈勇2,
温濛1,
王展鹏1
1.重庆邮电大学通信与信息工程学院 重庆 400065
2.重庆邮电大学自动化学院 重庆 400065
基金项目:国家自然科学基金(51977021)；重庆市科技局自然科学基金 (CSTC2019jcyj-msxmX0613)
详细信息
作者简介:刘焕淋：女，1970年生，教授，研究方向为光通信技术与未来网络
胡会霞：女，1997年生，硕士生，研究方向为生存光网络频谱路由
陈勇：男，1963年生，教授，研究方向为光通信与传感检测技术
温濛：女，1996年生，硕士生，研究方向为光通信和光网络
王展鹏：男，1996年生，硕士生，研究方向为光网络资源分配
通讯作者:刘焕淋 liuhl2@sina.com
中图分类号:TN929.11计量
文章访问数:827
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被引次数:0
出版历程
收稿日期:2019-07-18
修回日期:2020-07-08
网络出版日期:2020-07-22
刊出日期:2020-09-27
Survivability Coordinated Mapping Based on Node Centrality and Spectrum Dispersion Awareness for Virtual Optical Networks
Huanlin LIU1,,,Huixia HU1,
Yong CHEN2,
Meng WEN1,
Zhanpeng WANG1
1. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
2. School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Funds:The National Natural Science Foundation of China(51977021), The Natural Science Foundation Project of Chongqing Science and Technology Commission (CSTC2019 jcyj-msxmX0613)
摘要
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。
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
Abstract: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.
Key words:Virtual optical network/
Survivable coordinated mapping/
Node centrality/
Spectrum dispersion/
Spectrum usage ratio
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