多芯光纤中的自适应阈值和频谱优先算法  

Adaptive threshold and spectrum first algorithm in multi-core fiber

作　　者：江亮 葛瑞林 陈铭毓 沈建华[1] JIANG Liang;GE Ruilin;CHEN Mingyu;SHEN Jianhua(School of communication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjin 210003,China)

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《光通信技术》2023年第5期29-33,共5页Optical Communication Technology

基　　金：南京邮电大学研发基金类项目(2022外072)资助。

摘　　要：为了有效解决纤芯中的串扰问题并降低网络阻塞率,提出了一种自适应阈值和频谱优先(AT-SF)算法,采用纤芯分组的方式使每组中的纤芯不相邻,将典型的7芯光纤分成3组,第三组纤芯的优先级在业务到达过程中是可变的;同时,AT-SF算法引入了频隙(FS)阈值参数,将大于FS阈值的业务分配在第一、第二或者第三组纤芯上,小于等于FS阈值的业务只分配在第三组纤芯上。分别在NSFNET、USNET网络中进行了仿真实验,对比了首次匹配(FF)、三维资源分配(3D-RA)、路径优先(aW-PF)、共轭梯度频谱优先(CG-SF)算法性能。仿真结果表明,与其它算法相比,AT-SF算法在网络处于高负载状态时能获得更好的阻塞率和串扰性能。In order to solve the crosstalk problem and reduce the blocking rate,an adaptive threshold and spectrum first(AT-SF)algorithm is proposed.The fiber cores in each group are grouped so that they are not adjacent,and a typical 7-core fiber is divided into three groups.The priority level of the third group of fiber cores is variable during the service arrival process..At the same time,the AT-SF algorithm introduces the frequency slot(FS)threshold parameter,and allocates the services greater than the FS threshold to the first,second or third group of fibers,while the services less than or equal to the FS threshold are only allocated to the third group of fibers.The simulation experiments are carried out in NSFNET and USNET networks,and the performance of first match(FF),3D resource allocation(3D-RA),path first(aW-PF)and conjugate gradient spectrum first(CG-SF)algorithms are compared.The simulation results show that the AT-SF algorithm can obtain better blocking rate and crosstalk performance than other algorithms when the network is under high load.

关 键 词：空分复用弹性光网络 串扰 频隙阈值 

分 类 号：TN929.1[电子电信—通信与信息系统]