弹性光网络中基于持续时间的奇偶分区频谱分配算法  

Odd-even partition spectrum assignment algorithm based on holding time for elastic optical networks

作　　者：张盛峰[1] 王鹏[1] 袁强 黄胜[1] ZHANG Shengfeng;WANG Peng;YUAN Qiang;HUANG Sheng(Institute of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《光通信技术》2020年第7期47-51,共5页Optical Communication Technology

基　　金：国家自然科学基金(61571072)资助。

摘　　要：为了解决弹性光网络中频谱碎片过多的问题,提出了一种基于持续时间的奇偶分区频谱分配(OEPSA-HT)算法。该算法考虑混合速率业务、业务持续时间等因素,根据链路中不同类型的业务划分专用区域,同时将专用区域分为奇偶2种类型,使得相邻的奇偶区域之间形成共享区域,提高业务传输的成功率;并且结合业务的持续时间,采用一种分区-时间结合策略,在时域下有效地减少频谱碎片。仿真结果表明:算法能够有效地减少带宽阻塞率,同时提高频带利用率。In order to solve the problem of excessive spectrum fragmentation in elastic optical networks,this paper proposes an odd-even partition spectrum assignment algorithm based on holding time.The algorithm considers the factors such as the mixed line rate services and the holding time for services,according to the different types of services in the link,the special area is divided into two types:odd and even,which makes the adjacent odd and even areas form a shared area and improves the success rate of service transmission.Combined with the holding time of the services,a partition-time combine strategy is adopted to effectively reduce the spectrum fragmentation in the time domain.The simulation results show that the algorithm can effectively reduce the bandwidth blocking probability and improve the spectrum utilization ratio.

关 键 词：频谱碎片 奇偶分区 持续时间 带宽阻塞率 频带利用率 

分 类 号：TN929.11[电子电信—通信与信息系统]