Shared-Path Protection in OFDM-based Optical Networks with Elastic Bandwidth Allocation

Xu, Sugang; Yeo, Yong-Kee; Xu, Zhaowen; Cheng, Xiaofei; Zhou, Lihua

doi:10.1364/ofc.2012.oth4b.4

Cited by 56 publications

(36 citation statements)

References 8 publications

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“…In case there is no solution exists in search of either of primary or backup, the connection request is blocked. Three spectrum assignment algorithms combined with kshortest path will be described: First-Fit (FF) Algorithm proposed in [3], Minimum Free Spectrum Block Consumption Algorithm (MFSB) proposed in [4] 1 and a novel solution Primary First-Fit Modified Backup Last-Fit (PF-MLF) proposed for the first time in this paper. Fig.…”

Section: Shared Path Protected Rmlsamentioning

confidence: 99%

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Shared path protection for distance adaptive elastic Optical Networks under dynamic traffic

Tarhan

Çavdar

2013

2013 5th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT)

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Abstract-Elastic Optical Networks (EONs), evolved as a scalable infrastructure to provide optical connectivity for large variety of bandwidth requests ranging from 1Gbps to 1Tbps. Thanks to the enabling technologies such as bandwidth variable transponders and flexible switches, bandwidth adaptive spectrum allocation became possible. EONs can carry large optical channels with higher spectrum efficiency with the recent changes in the standard fixed division of optical spectrum. In this study we propose a distance adaptive, dynamic shared path protection scheme for EONs. In conventional WDM networks, shareability used to be one of the prime objectives to maximize the backup resource efficiency. In EONs, spectrum resources can be shared partially between connections and different parts of the allocated spectrum may be shared by different connections at the same time. Not only the routing but also spectrum allocation of backup resources has a big impact on the shareability in EONs. Taking this into account, we developed a novel RSA (Routing and Spectrum Allocation) algorithm applying different strategies for primary and backup resources called Primary First-Fit Modified Backup Last-Fit (PF-MBL) aiming to reduce the fragmentation and to increase the shareability. As a result overall bandwidth blocking probability is significantly reduced in the network. Results show that PF-MBL can improve the performance in terms of bandwidth blocking probability by 24% up to 59% compared to the current outperforming algorithm when the bandwidth acceptance ratio of the system varies from 90% to 99.9% in different loads.

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Section: Shared Path Protected Rmlsamentioning

confidence: 99%

“…Our algorithm aims to increase the number of shared frequency slots among backup paths as well as to decrease the fragmentation of spectrum resources. We compare our solution with two existing solutions, [3] and [4], used for resource allocation by simulation.…”

Section: Introductionmentioning

confidence: 99%

Shared path protection for distance adaptive elastic Optical Networks under dynamic traffic

Tarhan

Çavdar

2013

2013 5th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT)

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“…Then to ensure the high-performance QoS of user demands after a failure deserves to be the research focus. So far, optical network survivability in the optical network scenario has been well studied for the failure events [10][11][12][13]. To cope with single failure problem in WDM mesh networks, authors in [10] systematically summarize the protection schemes for survivability including dedicated-path protection, shared-path protection and shared-link protection.…”

Section: Introductionmentioning

confidence: 99%

“…The bandwidth squeezed restoration scheme is proposed [11] by the manner of best-effort recovery to overcome the restored spectral insufficiency and ensure a highly survivable traffic. Authors in [12] propose and evaluate shared-path protection strategies in OFDMbased optical networks, and show that aggressive backup sharing can significantly improve capacity efficiency. The authors in [13] propose an efficient survivable FWDM network design algorithm, which can achieve a better efficiency in terms of power consumption, spectral utilization and cost.…”

Section: Introductionmentioning

confidence: 99%

Multipath protection for data center services in OpenFlow-based software defined elastic optical networks

Yang

Cheng

Yuan

et al. 2015

Optical Fiber Technology

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“…O problema de RSA com proteção compartilhada possui complexidade de tempo polinomial não determinístico (NP-completo) [21].…”

Section: Complexidade Computacionalunclassified

Proteção compartilhada e restauração de tráfego em redes ópticas de segmentação espectral flexível

Capelari¹

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Shared-Path Protection in OFDM-based Optical Networks with Elastic Bandwidth Allocation

Abstract: Compared with backup sharing in WDM networks, it is more complex and challenging to share backup resources in OFDM-based optical networks with elastic bandwidth allocation. We propose and evaluate conservative and agressive backup sharing policies.

Cited by 56 publications

References 8 publications

Shared path protection for distance adaptive elastic Optical Networks under dynamic traffic

Shared path protection for distance adaptive elastic Optical Networks under dynamic traffic

Multipath protection for data center services in OpenFlow-based software defined elastic optical networks

Proteção compartilhada e restauração de tráfego em redes ópticas de segmentação espectral flexível

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