张黎,
何荣希,
大连海事大学信息科学技术学院 ??大连 ??116026
基金项目:国家自然科学基金(61371091, 61801074)、中央高校基本科研业务费(3132016318, 3132017078)
详细信息
作者简介:于存谦：男，1983年生，博士，讲师，研究方向为光数据中心网络
张黎：女，1992年生，硕士生，研究方向为弹性光网络
何荣希：男，1971年生，博士，教授，研究方向为光网络和无线网络技术
通讯作者:何荣希 hrx@dlmu.edu.cn
1) 对已建业务连接进行DS会降低其QoE，运营商以较低的租赁费用换得用户的忠诚度，故被降级业务的单位利润率会有所降低。中图分类号:TN929.11
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出版历程
收稿日期:2018-01-19
修回日期:2018-09-26
网络出版日期:2018-10-22
刊出日期:2019-01-01
Dynamic Routing and Spectrum Assignment Algorithm Based on Differentiated Degraded-service and Adaptive Modulation in Elastic Optical Networks
Cunqian YU,Li ZHANG,
Rongxi HE,
College of Information Science and Technology, Dalian Maritime University, Dalian 116026, China
Funds:The National Natural Science Foundation of China (61371091, 61801074), The Fundamental Research Funds for Central Universities (3132016318, 3132017078)
摘要
摘要:面对高速发展的互联网应用，传统的路由与频谱分配(RSA)问题迎来新的挑战。融合降级服务(DS)技术的弹性光网络无疑为降低业务阻塞率，提高用户体验质量(QoE)提供了新方向。该文首先针对频谱资源的低效利用和DS导致的业务收益下降问题，建立以最小化频谱消耗和最小化DS等级、频次为联合优化目标的RSA问题的混合整数线性规划模型。随后，提出一种基于区分DS和自适应调制的动态RSA算法。该算法考虑业务等级的差异化，并整合自适应调制和DS技术。同时，设计区分业务等级的DS损失函数及DS窗口选择策略，为即将受阻业务分配理想的频谱位置和资源。此外，设计考虑频谱与收益均衡关系的网络收益函数，达到频谱资源高效利用，减少降级影响，提升网络收益的目的。最后，仿真验证了所提算法在业务阻塞率和网络收益等方面的优势。
关键词:弹性光网络/
路由与频谱分配/
降级服务/
区分服务/
自适应调制
Abstract:Oriented to the high-rapid development of Internet applications, new challenges are encountered by the conventional Routing and Spectrum Assignment (RSA). A new direction for the blocking rate reduction and the Quality of Experience (QoE) assurance is provided to the Elastic Optical Network (EON) integrated by Degraded Service (DS) technology. Due to the inefficiency of spectrum resources and the revenue decline caused by DS, a Mixed Integer Linear Programming (MILP) model is proposed with a joint objective that minimizes both spectrum consumption and the priorities and DS frequency of online services. A dynamic RSA algorithm based on differentiated DS and adaptive modulation is proposed, which considers service-priority differentiation, the adaptive modulation and DS technology. Meanwhile, DS loss function and DS window selection strategy are designed to differentiate service levels, and ideal spectrum location and resource are assigned for the impending blocked services. The network revenue function considering the relationship between spectrum and revenue balance is designed to achieve efficient utilization of spectrum resources, reduce the impact of degradation, and enhance network revenue. The simulation results verify the advantages of the proposed algorithm in terms of blocking rate, network profit, etc.
Key words:Elastic Optical Network (EON)/
Routing and Spectrum Assignment (RSA)/
Degraded Service (DS)/
Differentiated service/
Adaptive modulation
注释:
1) 1) 对已建业务连接进行DS会降低其QoE，运营商以较低的租赁费用换得用户的忠诚度，故被降级业务的单位利润率会有所降低。
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