GMPLS-based provisioning of ethernet connections over WSON with quality of service

The rapid growth of the data traffic, caused by the ever-growing number of Internet users and the services requiring huge bandwidth (e.g., videoconferences, IPTV, etc.) show that the existing transport network infrastructure is not optimal in terms of cost, flexibility and scalability. In this conte...

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Bibliographic Details
Author: Bukva, Anica
Format: doctoral thesis
Publication Date:2012
Country:España
Institution:Universitat Politècnica de Catalunya (UPC)
Repository:UPCommons. Portal del coneixement obert de la UPC
Language:English
OAI Identifier:oai:upcommons.upc.edu:2117/94804
Online Access:https://hdl.handle.net/2117/94804
https://dx.doi.org/10.5821/dissertation-2117-94804
Access Level:Open access
Keyword:Ethernet (Sistema de xarxa d'àrea local)
Ordinadors, Xarxes d'
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació
id ES_655e99e1a18b3bb1c58895e5121b8a8b
oai_identifier_str oai:upcommons.upc.edu:2117/94804
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv GMPLS-based provisioning of ethernet connections over WSON with quality of service
title GMPLS-based provisioning of ethernet connections over WSON with quality of service
spellingShingle GMPLS-based provisioning of ethernet connections over WSON with quality of service
Bukva, Anica
Ethernet (Sistema de xarxa d'àrea local)
Ordinadors, Xarxes d'
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació
title_short GMPLS-based provisioning of ethernet connections over WSON with quality of service
title_full GMPLS-based provisioning of ethernet connections over WSON with quality of service
title_fullStr GMPLS-based provisioning of ethernet connections over WSON with quality of service
title_full_unstemmed GMPLS-based provisioning of ethernet connections over WSON with quality of service
title_sort GMPLS-based provisioning of ethernet connections over WSON with quality of service
dc.creator.none.fl_str_mv Bukva, Anica
author Bukva, Anica
author_facet Bukva, Anica
author_role author
dc.contributor.none.fl_str_mv Casellas Regi, Ramon
Martínez Rivera, Ricardo Víctor
dc.subject.none.fl_str_mv Ethernet (Sistema de xarxa d'àrea local)
Ordinadors, Xarxes d'
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació
topic Ethernet (Sistema de xarxa d'àrea local)
Ordinadors, Xarxes d'
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació
description The rapid growth of the data traffic, caused by the ever-growing number of Internet users and the services requiring huge bandwidth (e.g., videoconferences, IPTV, etc.) show that the existing transport network infrastructure is not optimal in terms of cost, flexibility and scalability. In this context, an appealing solution relies on deploying a multi-layer network (MLN) constituted by a dual layer infrastructure combining the benefits provided by flexible Connection Oriented (CO) - Ethernet and the huge transmission capacity provided by Wavelength Switched Optical Networks (WSON), controlled by a Generalized Multi-Protocol Label Switching (GMPLS) unified control plane. An important concept in such a MLN is the Forwarding Adjacency (FA). The aim of FAs is to exploit the grooming decisions where existent lower-layer Label Switched Paths (LSPs) (i.e., FA LSPs) with sufficient unreserved bandwidth are intelligently reused when accommodating and serving new upper-layer LSPs. By doing so, the established lower-layer LSPs form a Virtual Network Topology (VNT) for the provisioning of CO-Ethernet services. One of the main challenges in a MLN is how to accommodate dynamically requested higher-layer connections in the created VNT to optimally utilize the large capacity offered by a WSON. In this regard, we focus on the problem of path computation and LSP provisioning in a CO-Ethernet over WSON network, under the framework of GMPLS unified control plane. Firstly, we propose the usage of a FA TE link timer, which postpones the release of created FA TE link when there are no more upperlayer connections over such a link, rather than releasing it immediately. By doing so, we do reduce the signaling overhead due to consecutive triggering of FA TE links between the same pair of nodes. As a second contribution, we compare three approaches for dynamic VNT reconfiguration: semi-dynamic, virtual and dynamic, using our proposed online path computation algorithm. We show that with the dynamic approach the lowest connection blocking probability is obtained but at the expense of the increased setup delay. Finally, we have proposed a dynamic path computation algorithm that chooses the route depending on the current state of the network resources, favoring the usage/re-use of virtual and active FA TE links over establishing new optical LSPs occupying unused wavelength channels. The proposed algorithm provides better usage of the network resources, keeping the connection blocking probability low, comparing with selected algorithms proposed in the literature. Next, we focus on schemes and mechanisms for dedicated path protection in a CO-Ethernet over WSON network. In that sense, after classifying recovery mechanisms for MLN found in the literature, we compare both link- and Shared Risk Link Group (SRLG) - disjoint schemes. These schemes aim at computing a link- and SRLG-disjoint backup path with respect to the computed working paths, respectively. It is shown that, although the SRLG-disjoint scheme provides higher survivability comparing with the link-disjoint scheme, the connection blocking probability is still significantly higher. As a second contribution regarding dedicated path protection, we present a protection scheme which tries to accommodate a requested connection over the least congested TE links (i.e., higher unused bandwidth), while establishing both, working and backup paths. The aim of this contribution is to provide an efficient usage of the network resources and to minimize the number of connections affected by a link failure. Finally, we propose a Suurballe algorithm-based scheme that aims at decreasing the connection blocking probability due to working path SRLG-joint links that are removed during the backup path computation. The exhaustive performance evaluations of the above contributions are conducted through simulations under the assumption of dynamic traffic pattern and using well-known reference network topologies.
publishDate 2012
dc.date.none.fl_str_mv 2012
2012-12-10
2013
2013-05-17
dc.type.none.fl_str_mv doctoral thesis
http://purl.org/coar/resource_type/c_db06
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/94804
https://dx.doi.org/10.5821/dissertation-2117-94804
url https://hdl.handle.net/2117/94804
https://dx.doi.org/10.5821/dissertation-2117-94804
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universitat Politècnica de Catalunya
publisher.none.fl_str_mv Universitat Politècnica de Catalunya
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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spelling GMPLS-based provisioning of ethernet connections over WSON with quality of serviceBukva, AnicaEthernet (Sistema de xarxa d'àrea local)Ordinadors, Xarxes d'Àrees temàtiques de la UPC::Enginyeria de la telecomunicacióThe rapid growth of the data traffic, caused by the ever-growing number of Internet users and the services requiring huge bandwidth (e.g., videoconferences, IPTV, etc.) show that the existing transport network infrastructure is not optimal in terms of cost, flexibility and scalability. In this context, an appealing solution relies on deploying a multi-layer network (MLN) constituted by a dual layer infrastructure combining the benefits provided by flexible Connection Oriented (CO) - Ethernet and the huge transmission capacity provided by Wavelength Switched Optical Networks (WSON), controlled by a Generalized Multi-Protocol Label Switching (GMPLS) unified control plane. An important concept in such a MLN is the Forwarding Adjacency (FA). The aim of FAs is to exploit the grooming decisions where existent lower-layer Label Switched Paths (LSPs) (i.e., FA LSPs) with sufficient unreserved bandwidth are intelligently reused when accommodating and serving new upper-layer LSPs. By doing so, the established lower-layer LSPs form a Virtual Network Topology (VNT) for the provisioning of CO-Ethernet services. One of the main challenges in a MLN is how to accommodate dynamically requested higher-layer connections in the created VNT to optimally utilize the large capacity offered by a WSON. In this regard, we focus on the problem of path computation and LSP provisioning in a CO-Ethernet over WSON network, under the framework of GMPLS unified control plane. Firstly, we propose the usage of a FA TE link timer, which postpones the release of created FA TE link when there are no more upperlayer connections over such a link, rather than releasing it immediately. By doing so, we do reduce the signaling overhead due to consecutive triggering of FA TE links between the same pair of nodes. As a second contribution, we compare three approaches for dynamic VNT reconfiguration: semi-dynamic, virtual and dynamic, using our proposed online path computation algorithm. We show that with the dynamic approach the lowest connection blocking probability is obtained but at the expense of the increased setup delay. Finally, we have proposed a dynamic path computation algorithm that chooses the route depending on the current state of the network resources, favoring the usage/re-use of virtual and active FA TE links over establishing new optical LSPs occupying unused wavelength channels. The proposed algorithm provides better usage of the network resources, keeping the connection blocking probability low, comparing with selected algorithms proposed in the literature. Next, we focus on schemes and mechanisms for dedicated path protection in a CO-Ethernet over WSON network. In that sense, after classifying recovery mechanisms for MLN found in the literature, we compare both link- and Shared Risk Link Group (SRLG) - disjoint schemes. These schemes aim at computing a link- and SRLG-disjoint backup path with respect to the computed working paths, respectively. It is shown that, although the SRLG-disjoint scheme provides higher survivability comparing with the link-disjoint scheme, the connection blocking probability is still significantly higher. As a second contribution regarding dedicated path protection, we present a protection scheme which tries to accommodate a requested connection over the least congested TE links (i.e., higher unused bandwidth), while establishing both, working and backup paths. The aim of this contribution is to provide an efficient usage of the network resources and to minimize the number of connections affected by a link failure. Finally, we propose a Suurballe algorithm-based scheme that aims at decreasing the connection blocking probability due to working path SRLG-joint links that are removed during the backup path computation. The exhaustive performance evaluations of the above contributions are conducted through simulations under the assumption of dynamic traffic pattern and using well-known reference network topologies.Universitat Politècnica de CatalunyaCasellas Regi, RamonMartínez Rivera, Ricardo Víctor20122012-12-1020132013-05-17doctoral thesishttp://purl.org/coar/resource_type/c_db06VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/doctoralThesisapplication/pdfhttps://hdl.handle.net/2117/94804https://dx.doi.org/10.5821/dissertation-2117-94804reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/948042026-05-27T15:37:01Z
score 15,301629

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