Availability Analysis of Shared Backup Path Protection Under Multiple-link Failure Scenario in WDM Networks

Dedicated protection and shared protection are the main protection schemes in optical wavelength division multiplexing (WDM) networks. Shared protection techniques surpass the dedicated protection techniques by providing the same level of availability as dedicated protection with reduced spare...

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Main Authors:	M. Nomani, Kabir, M. A. A., Azim
Format:	Article
Published:	Springer 2014
Subjects:	QA76 Computer software
Online Access:	http://umpir.ump.edu.my/id/eprint/6947/ http://umpir.ump.edu.my/id/eprint/6947/ http://umpir.ump.edu.my/id/eprint/6947/

id	ump-6947
recordtype	eprints
spelling	ump-69472018-09-25T08:46:46Z http://umpir.ump.edu.my/id/eprint/6947/ Availability Analysis of Shared Backup Path Protection Under Multiple-link Failure Scenario in WDM Networks M. Nomani, Kabir M. A. A., Azim QA76 Computer software Dedicated protection and shared protection are the main protection schemes in optical wavelength division multiplexing (WDM) networks. Shared protection techniques surpass the dedicated protection techniques by providing the same level of availability as dedicated protection with reduced spare capacity. Satisfying the service availability levels defined by the user’s service-level agreement (SLA) in a cost-effective and resource-efficient way is a major challenge for networks operators. Hence, evaluating the availability of the shared protection scheme has a great interest. We recently developed an analytical model to estimate network availability of a WDM network with shared-link connections under multiple link-failures. However, this model requires the information of all possible combinations of the unshared protection paths, which is somehow troublesome. In this paper, we propose a more practical analytical model for evaluating the availability of a WDM network with shared-link connections under multiple link-failures. The proposed model requires only an estimate of the set of shared paths of each protection path. The estimated availability of the proposed model accurately matched with that of the previous model. Finally, we compare the previous model with the proposed model to demonstrate the merits and demerits of both models illustrating the threshold at which each model performs better based on the computational complexity. The proposed model significantly contributes to the related areas by providing network operators with a practical tool to evaluate quantitatively the system-availability and, thus, the expected survivability degree of WDM optical networks with shared connections under multiple-link failures. Springer 2014 Article PeerReviewed M. Nomani, Kabir and M. A. A., Azim (2014) Availability Analysis of Shared Backup Path Protection Under Multiple-link Failure Scenario in WDM Networks. Annals of Telecommunications. pp. 1-14. ISSN 0003-4347 (print); 1958-9395 (online) http://dx.doi.org/10.1007/s12243-014-0446-3 DOI: 10.1007/s12243-014-0446-3
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
topic	QA76 Computer software
spellingShingle	QA76 Computer software M. Nomani, Kabir M. A. A., Azim Availability Analysis of Shared Backup Path Protection Under Multiple-link Failure Scenario in WDM Networks
description	Dedicated protection and shared protection are the main protection schemes in optical wavelength division multiplexing (WDM) networks. Shared protection techniques surpass the dedicated protection techniques by providing the same level of availability as dedicated protection with reduced spare capacity. Satisfying the service availability levels defined by the user’s service-level agreement (SLA) in a cost-effective and resource-efficient way is a major challenge for networks operators. Hence, evaluating the availability of the shared protection scheme has a great interest. We recently developed an analytical model to estimate network availability of a WDM network with shared-link connections under multiple link-failures. However, this model requires the information of all possible combinations of the unshared protection paths, which is somehow troublesome. In this paper, we propose a more practical analytical model for evaluating the availability of a WDM network with shared-link connections under multiple link-failures. The proposed model requires only an estimate of the set of shared paths of each protection path. The estimated availability of the proposed model accurately matched with that of the previous model. Finally, we compare the previous model with the proposed model to demonstrate the merits and demerits of both models illustrating the threshold at which each model performs better based on the computational complexity. The proposed model significantly contributes to the related areas by providing network operators with a practical tool to evaluate quantitatively the system-availability and, thus, the expected survivability degree of WDM optical networks with shared connections under multiple-link failures.
format	Article
author	M. Nomani, Kabir M. A. A., Azim
author_facet	M. Nomani, Kabir M. A. A., Azim
author_sort	M. Nomani, Kabir
title	Availability Analysis of Shared Backup Path Protection Under Multiple-link Failure Scenario in WDM Networks
title_short	Availability Analysis of Shared Backup Path Protection Under Multiple-link Failure Scenario in WDM Networks
title_full	Availability Analysis of Shared Backup Path Protection Under Multiple-link Failure Scenario in WDM Networks
title_fullStr	Availability Analysis of Shared Backup Path Protection Under Multiple-link Failure Scenario in WDM Networks
title_full_unstemmed	Availability Analysis of Shared Backup Path Protection Under Multiple-link Failure Scenario in WDM Networks
title_sort	availability analysis of shared backup path protection under multiple-link failure scenario in wdm networks
publisher	Springer
publishDate	2014
url	http://umpir.ump.edu.my/id/eprint/6947/ http://umpir.ump.edu.my/id/eprint/6947/ http://umpir.ump.edu.my/id/eprint/6947/
first_indexed	2023-09-18T22:03:06Z
last_indexed	2023-09-18T22:03:06Z
_version_	1777414530119237632

Availability Analysis of Shared Backup Path Protection Under Multiple-link Failure Scenario in WDM Networks

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