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On the spectrum-efficiency of QoS-aware protection in elastic optical networks

Elastic optical networks technologies feature several benefits including higher spectral efficiency, system capacity and therefore have been widely viewed as the promising paradigm for next-generation optical transport networks. Dedicated path protection for elastic optical networks has been of ever...

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Tác giả chính:	Đào, Thanh Hải, Dao, Thanh Hai
Định dạng:	Bài Báo
Ngôn ngữ:	English
Nhà xuất bản:	Elsevier 2020
Chủ đề:	Elastic optical network Dedicated protection Optical communications Flexible transponder Quality-of-service
Truy cập trực tuyến:	https://dlib.phenikaa-uni.edu.vn/handle/PNK/374 https://doi.org/10.1016/j.ijleo.2019.163563
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spelling	oai:localhost:PNK-3742022-08-17T05:54:37Z On the spectrum-efficiency of QoS-aware protection in elastic optical networks Đào, Thanh Hải Dao, Thanh Hai Elastic optical network Dedicated protection Optical communications Flexible transponder Quality-of-service Elastic optical networks technologies feature several benefits including higher spectral efficiency, system capacity and therefore have been widely viewed as the promising paradigm for next-generation optical transport networks. Dedicated path protection for elastic optical networks has been of ever-increasing importance in the era of information society thanks to its near-immediate recovery speed and remarkably simple operations in guaranteeing the connectivity of information flows. Inspired by the observation that the today premium network traffic traveling in fiber links accounts for roughly 25% of total traffic and the best-effort traffic constitutes the remaining, we propose a new design for elastic optical networks with dedicated path protection tailoring to the actual traffic profile rather than enforcing the same protection service for both traffic types as with conventional approaches. Our proposal exploits the flexible baud-rate transponders shared between the working and protection mode, featuring lower baud-rate operation for protection mode to provide just enough bandwidth for premium traffic. To maximize the impact of protection service differentiation, we present a novel integer linear programming taking into account the proposed quality-of-service-aware protection aiming at minimizing the spectrum usage. Numerical results on a realistic topology, COST239, are provided to assess the efficiency of our proposal compared to the traditional approach and it has been highlighted that having quality-of-service-aware protection being adapted to the actual traffic characteristic presents significant spectrum savings. With the current estimate of premium traffic of 25%, our study suggests that more than 30% spectral saving could be achieved and generally the low-load condition is more profitable than the medium and high-load ones. 2020-06-09T08:32:14Z 2020-06-09T08:32:14Z 2020 Article https://dlib.phenikaa-uni.edu.vn/handle/PNK/374 https://doi.org/10.1016/j.ijleo.2019.163563 en application/pdf Elsevier
institution	Digital Phenikaa
collection	Digital Phenikaa
language	English
topic	Elastic optical network Dedicated protection Optical communications Flexible transponder Quality-of-service
spellingShingle	Elastic optical network Dedicated protection Optical communications Flexible transponder Quality-of-service Đào, Thanh Hải Dao, Thanh Hai On the spectrum-efficiency of QoS-aware protection in elastic optical networks
description	Elastic optical networks technologies feature several benefits including higher spectral efficiency, system capacity and therefore have been widely viewed as the promising paradigm for next-generation optical transport networks. Dedicated path protection for elastic optical networks has been of ever-increasing importance in the era of information society thanks to its near-immediate recovery speed and remarkably simple operations in guaranteeing the connectivity of information flows. Inspired by the observation that the today premium network traffic traveling in fiber links accounts for roughly 25% of total traffic and the best-effort traffic constitutes the remaining, we propose a new design for elastic optical networks with dedicated path protection tailoring to the actual traffic profile rather than enforcing the same protection service for both traffic types as with conventional approaches. Our proposal exploits the flexible baud-rate transponders shared between the working and protection mode, featuring lower baud-rate operation for protection mode to provide just enough bandwidth for premium traffic. To maximize the impact of protection service differentiation, we present a novel integer linear programming taking into account the proposed quality-of-service-aware protection aiming at minimizing the spectrum usage. Numerical results on a realistic topology, COST239, are provided to assess the efficiency of our proposal compared to the traditional approach and it has been highlighted that having quality-of-service-aware protection being adapted to the actual traffic characteristic presents significant spectrum savings. With the current estimate of premium traffic of 25%, our study suggests that more than 30% spectral saving could be achieved and generally the low-load condition is more profitable than the medium and high-load ones.
format	Article
author	Đào, Thanh Hải Dao, Thanh Hai
author_facet	Đào, Thanh Hải Dao, Thanh Hai
author_sort	Đào, Thanh Hải
title	On the spectrum-efficiency of QoS-aware protection in elastic optical networks
title_short	On the spectrum-efficiency of QoS-aware protection in elastic optical networks
title_full	On the spectrum-efficiency of QoS-aware protection in elastic optical networks
title_fullStr	On the spectrum-efficiency of QoS-aware protection in elastic optical networks
title_full_unstemmed	On the spectrum-efficiency of QoS-aware protection in elastic optical networks
title_sort	on the spectrum-efficiency of qos-aware protection in elastic optical networks
publisher	Elsevier
publishDate	2020
url	https://dlib.phenikaa-uni.edu.vn/handle/PNK/374 https://doi.org/10.1016/j.ijleo.2019.163563
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score	8.887836

On the spectrum-efficiency of QoS-aware protection in elastic optical networks

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