基于模式间串扰避免的弹性光交换节点冲突解决方法  

Conflict Resolution of Elastic Optical Switching Node Based on Inter Modes Crosstalk-avoidance

作　　者：刘焕淋[1] 王展鹏 任杰 陈勇[2] 方菲 温濛 LIU Huanlin;WANG Zhanpeng;REN Jie;CHEN Yong;FANG Fei;WEN Meng(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;School of Automation,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 [2]重庆邮电大学自动化学院,重庆400065

出　　处：《电子与信息学报》2021年第8期2224-2231,共8页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(51977021);重庆市自然科学基金(2019jcyj-msxmX0613,2020jcyj-msxmX0682)。

摘　　要：为了减少业务在少模光纤空分复用弹性光网络全光交换节点内资源冲突的概率,该文在全光分层节点结构中配置共享的有限频谱转换器与资源预留模块(LARSL),提出基于模式间串扰避免的空-频-时域联合资源冲突解决算法(LARSL-CACRA)。在空-频域,为LARSL-CACRA设计基于模式间串扰避免的滑动窗的模式-频谱资源块计算方法,使频谱冲突业务获得负载更均衡的模式-频谱资源块。对于仍然冲突的业务,LARSL-CACRA使用时域资源预留模块,进一步降低业务带宽阻塞率。仿真结果表明,该文设计的LARSL-CACRA可以改善交换节点带宽阻塞率,并减少业务平均时延。For addressing the requests conflict in all-optical switching node of space-division multiplexing elastic optical network with few-mode fibers,an all-optical Layered Architecture based on Resource reservation module and Shared Limited-range spectrum converter(LARSL)is studied in the paper.First,a inter modes Crosstalk Avoidance-based on space,frequency and time domain combing resource Conflict Resolution Algorithm for LARSL(LARSL-CACRA)is put forward.Then,a calculation method for crosstalk-avoidance resource block using sliding window is designed to search the more balanced mode-spectrum resource black for the spectrum conflicted requests in the space-frequency domain.Moreover,a time domain resource reservation module is designed to reserve still conflicting requests to next scheduling time for further reducing the bandwidth blocking probability.Simulation result show that the proposed LARSL-CACRA can decrease node’s bandwidth blocking probability and can also reduce the cache delay.

关 键 词：空分复用弹性光网络 冲突解决 串扰避免 模式-频谱资源块 带宽阻塞率 

分 类 号：TN929.11[电子电信—通信与信息系统]