摘要
针对弹性光网络中现有碎片整理方法未能充分利用最大空闲频谱块且业务迁移数目较多的问题,提出一种剩余持续时间触发的最大带宽业务精确迁移的碎片整理(BBSEM-DF)算法。首先,构建碎片度量模型,衡量链路中频谱碎片的分布状态;然后,根据碎片量和业务的剩余持续时间设置阈值,触发碎片整理过程;最后,将最大连续业务组迁移至链路中与之所需频隙数相匹配的空闲频谱块处,进行精确迁移。仿真结果表明:与传统碎片整理算法相比,该算法可以减少频谱碎片,降低阻塞率,提高网络性能。
Aiming at the problem that the existing defragmentation methods in elastic optical networks can not make full use of the maximum free spectrum block and the number of service migrations is large,a defragmentation algorithm with maximum bandwidth service precise migration triggered by residual duration(BBSEM-DF)is proposed.Firstly,a fragment measurement model is constructed to measure the distribution of spectrum fragments in the link.Then,the threshold is set according to the amount of fragments and the remaining duration of business to trigger the defragmentation process.Finally,the maximum continuous service group is migrated to the free spectrum block in the link that matches the required number of frequency slots for accurate migration.The simulation results show that compared with the traditional defragmentation algorithm,this algorithm can reduce the spectrum fragments,reduce the blocking rate,and improve the network performance.
作者
商盼盼
任丹萍
张娟
王健
赵继军
SHANG Panpan;REN Danping;ZHANG Juan;WANG Jian;ZHAO Jijun(School of Information and Electrical Engineering,Hebei University of Engineering,Handan Hebei 056038,China;Hebei Key Laboratory ofSecurity and Protection Information Sensing and Processing,Hebei University of Engineering,Handan Hebei 056038,China)
出处
《光通信技术》
2021年第10期51-57,共7页
Optical Communication Technology
基金
河北省自然科学基金(F2019402240、F2018402198)资助。
关键词
弹性光网络
碎片整理
持续时间
业务迁移
阻塞率
elastic optical networks
defragmentation
holding time
services migration
blocking rate
