LIU Huanlin, ZHANG Jianjian, CHEN Yong, WANG Zhanpeng, CHEN Haonan, QIU Yan, HUO Xingji. A Time-varying Traffic Sharing Protection Based on Spectrum Window Sliding in Elastic Optical Networks[J]. Journal of Electronics & Information Technology, 2023, 45(10): 3694-3701. doi: 10.11999/JEIT221406
Citation:
LIU Huanlin, ZHANG Jianjian, CHEN Yong, WANG Zhanpeng, CHEN Haonan, QIU Yan, HUO Xingji. A Time-varying Traffic Sharing Protection Based on Spectrum Window Sliding in Elastic Optical Networks[J]. Journal of Electronics & Information Technology, 2023, 45(10): 3694-3701. doi: 10.11999/JEIT221406
LIU Huanlin, ZHANG Jianjian, CHEN Yong, WANG Zhanpeng, CHEN Haonan, QIU Yan, HUO Xingji. A Time-varying Traffic Sharing Protection Based on Spectrum Window Sliding in Elastic Optical Networks[J]. Journal of Electronics & Information Technology, 2023, 45(10): 3694-3701. doi: 10.11999/JEIT221406
Citation:
LIU Huanlin, ZHANG Jianjian, CHEN Yong, WANG Zhanpeng, CHEN Haonan, QIU Yan, HUO Xingji. A Time-varying Traffic Sharing Protection Based on Spectrum Window Sliding in Elastic Optical Networks[J]. Journal of Electronics & Information Technology, 2023, 45(10): 3694-3701. doi: 10.11999/JEIT221406
School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
2.
School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Funds:
The National Natural Science Foundation of China (51977021, 61275077), The Science Foundation Project of Chongqing Science and Technology Commission (cstc2020jcyj-msxmX0682)
Considering the problems of high spectrum resource consumption and high traffic blocking probability during the time-varying traffic’s survivability transmission in Elastic Optical Networks(EONs), a Time-varying Traffic Shared Protection method based on Spectrum Window Sliding (TTSP-SWS) is proposed in this paper. In TTSP-SWS, the protection lightpath with the minimum cost including the load weight of available spectrum block and the sharing degree of protected spectrum block is selected as the protection lightpath for time-varying traffic. By sliding the spectrum window on the protection path, the spectrum window with high sharing degree is allocated to time-varying traffic. When the required bandwidth of time-varying traffic changes, a spectrum window sliding-based survivable spectrum expansion or compressed strategy is adopted to adjust the allocated bandwidth. Simulation results show that TTSP-SWS can reduce traffic blocking ratio and protection resources’ redundancy.
针对生存性EONs中时变业务的路由和频谱分配问题,本文提出一种基于频谱窗滑动的时变业务共享保护(Time-varying Traffic Sharing Protection based on Spectrum Window Sliding, TTSP-SWS)算法。TTSP-SWS算法的贡献在于:(1)设计考虑可用频谱块承载权重和保护频谱块共享度的保护路径代价函数,用于选择时变业务的保护路径;(2)设计基于频谱窗滑动的保护路径的频谱分配策略为时变业务分配所需频谱块;(3)根据时变业务带宽变化情况,设计基于频谱窗滑动的频谱扩展/压缩的调整策略。
2.
问题描述
EONs拓扑抽象为G(V, E, F),其中,V表示EONs节点集合,E表示光纤链路集合,F表示每条链路提供的频隙资源集合。时变业务表示为r(s, d, B, q),其中,s,d分别表示时变业务的源、目的节点,B表示时变业务所需带宽,q表示时变业务需要的保护等级。
为了验证本文所提TTSP-SWS算法的性能,本文分别对DSPRA-DPP[16], DSPRA-SBPP[16]和FMDA-RSA[17]生存性策略在图1所示的国家科学基金网(National Science Foundation Network, NSFNET)和美国网络(United States of America Network, USNET)拓扑[17]中的业务阻塞率、保护冗余度和频谱使用率性能进行仿真,其中,NSFNET拓扑具有14个节点,21条链路,USNET拓扑包含24个节点,43条链路[17],设K=3,业务间保护频隙GB=1 fs,图1的链路旁边数字表示节点之间的物理长度,单位km。其他默认仿真主要参数如表1。
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LIU Huanlin, ZHANG Jianjian, CHEN Yong, WANG Zhanpeng, CHEN Haonan, QIU Yan, HUO Xingji. A Time-varying Traffic Sharing Protection Based on Spectrum Window Sliding in Elastic Optical Networks[J]. Journal of Electronics & Information Technology, 2023, 45(10): 3694-3701. doi: 10.11999/JEIT221406
LIU Huanlin, ZHANG Jianjian, CHEN Yong, WANG Zhanpeng, CHEN Haonan, QIU Yan, HUO Xingji. A Time-varying Traffic Sharing Protection Based on Spectrum Window Sliding in Elastic Optical Networks[J]. Journal of Electronics & Information Technology, 2023, 45(10): 3694-3701. doi: 10.11999/JEIT221406