弹性光网络中时-频碎片感知的频谱分配算法  

Time-Frequency Fragmentation-Aware Spectrum Allocation Algorithm in Elastic Optical Networks

作　　者：王健[1,2] 张娟 宿纪松[1,2] 胡劲华 赵继军 Wang Jian;Zhang Juan;Su Jisong;Hu Jinhua;Zhao Jijun(School of Information and Electrical Engineering,Hebei University of Engineering,Handan 056038,Hebei,China;Hebei Province Key Laboratory of Security Information Sensing and Processing,Handan 056038,Hebei,China)

机构地区：[1]河北工程大学信息与电气工程学院,河北邯郸056038 [2]河北省安防信息感知与处理重点实验室,河北邯郸056038

出　　处：《激光与光电子学进展》2023年第9期173-179,共7页Laser & Optoelectronics Progress

基　　金：河北省自然科学基金(F2019402240)。

摘　　要：频谱碎片已成为影响弹性光网络频谱利用率的主要因素。为减少频谱碎片,有效的频谱碎片化度量必不可少。基于此,本文通过对碎片资源的产生机理以及产生概率进行详细分析,构建了时-频碎片感知模型,并提出相应频谱分配算法,为连接请求选择了碎片化程度最小的频谱。仿真结果表明,相较于对比算法,提出算法在有效降低频谱碎片率的同时,能够降低业务阻塞率,以及提高频谱利用率。Spectrum fragmentation has become a primary factor that affects spectrum utilization in elastic optical networks.To reduce the spectrum fragmentation rate,effective measurement of the spectrum fragmentation is necessary.Thus,in this study,a timefrequency fragmentationaware model is developed based on a detailed analysis of the generation mechanism and probability of fragmentation resources,and a spectrum allocation algorithm is proposed to select the spectrum with the least degree of fragmentation for connection requests.Simulation results show that compared with the contrast algorithm,the proposed algorithm can reduce the service blocking rate and improve spectrum utilization while effectively reducing the spectrum fragmentation rate.

关 键 词：光通信 弹性光网络 频谱碎片 碎片感知 业务阻塞率 

分 类 号：TN929.2[电子电信—通信与信息系统]