摘要
为了解决空分复用弹性光网络中的频谱碎片、路由频谱纤芯分配(RSCA)和低业务负载下芯间串扰等问题,建立针对多纤芯RSCA问题的动态业务分割整数线性规划(ILP)模型,提出基于串扰避免的多纤芯分配算法(PS-MCT)。在路由选择阶段,综合路径负载和跳数设计路径排序公式;在频谱分配阶段,将纤芯分组,组内纤芯分类和多纤芯分配相结合;通过业务分割的方式使多个子业务独立地在同组内的多条纤芯上传输,从而减小串扰和碎片的产生。仿真结果表明,与对比算法相比,所提算法在带宽阻塞率和频谱利用率方面都取得了较好的性能。
In order to solve the problems of spectrum fragmentation,routing,spectrum,and core allocation(RSCA)and crosstalk under low-traffic load in space division multiplexing elastic optical networks,an integer linear programming(ILP)model based on dynamic service segmentation for problem of multi-core RSCA is established in this paper,and then a multi-core assignment algorithm based on crosstalk-avoiding is proposed.In the routing stage,a path sorting formula is designed based on the path load and the number of hops.In the spectrum allocation stage,we combined core grouping,intra-group core classification and multi-core assignment.Finally,our goal is to enable multiple sub-services to be independently transmitted on multi-cores in the same group by means of service segmentation,thus decreasing crosstalk and fragment.Simulation results show that the algorithm proposed in this article achieves better performance in blocking probability and spectrum utilization,comparing with the benchmarks.
作者
张盛峰
陈会丹
彭樱
ZHANG Shengfeng;CHEN Huidan;PENG Ying(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,P.R.China)
出处
《重庆邮电大学学报（自然科学版）》
CSCD
北大核心
2023年第1期23-30,共8页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
基金
国家自然科学基金(51977021)。
关键词
空分复用弹性光网络
串扰避免
频谱碎片
多纤芯分配
space division multiplexing elastic optical networks
crosstalk-avoiding
spectrum fragmentation
multi-core assignment
