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Impairment-Aware Dynamic Provisioning in WDM Networks with set-up Delay Tolerance and Holding-time Awareness
Linköpings universitet, Institutionen för systemteknik, Informationskodning. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för systemteknik, Informationskodning. Linköpings universitet, Tekniska högskolan.
Royal Institute of Technology (KTH), Stockholm, Sweden.
2011 (Engelska)Ingår i: Proceedings of the 17th IEEE International Conference on Networks (ICON), 2011, IEEE , 2011, s. 213-218Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

We study a dynamic WDM network with nonideal components in the physical layer which uses an impairment-aware routing and wavelength (RWA) algorithm for connection provisioning. We investigate the reduction in blocking probability (BP) by utilizing service Level Agreement (SLA) metric i.e. setup delay tolerance during connection provisioning. Furthermore, we explore the improvement in the network performance by efficiently utilizing the knowledge of the connections holding-time, another metric of SLA. Keeping in mind that BP reduction can be obtained by set-up delay tolerance [1] our focus is to investigate how set-up delay tolerance combined with holding-time awareness can improve BP performance caused by physical impairment. Our simulation results confirm that significant improvement can be achieved by holding-time aware connection provisioning compared to the unaware holding-time case. Moreover as expected, set-up delay tolerance can reduce BP even without knowledge of connections holding-time.

Ort, förlag, år, upplaga, sidor
IEEE , 2011. s. 213-218
Serie
IEEE International Conference on Networks, ISSN 1556-6463 ; 2011
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:liu:diva-85542DOI: 10.1109/ICON.2011.6168477ISBN: 978-1-4577-1824-3 (tryckt)OAI: oai:DiVA.org:liu-85542DiVA, id: diva2:571440
Konferens
17th IEEE International Conference on Networks (ICON), 2011, 14-16 Dec., Singapore
Tillgänglig från: 2012-11-22 Skapad: 2012-11-22 Senast uppdaterad: 2012-11-27Bibliografiskt granskad
Ingår i avhandling
1. Connections Provisioning Strategies for dynamic WDM networks
Öppna denna publikation i ny flik eller fönster >>Connections Provisioning Strategies for dynamic WDM networks
2012 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The size, complexity, and the amount of traffic generation of optical communication networks have dramatically increased over the last decades. Exciting technologies, namely, optical amplifiers, wavelength division multiplexing (WDM) and optical filters have been included in optical networks, in order to fulfill end users appetite for bandwidth. However, the users high bandwidth demand will further increase with time, as emerging on-demand bandwidth intensive applications are starting to dominate the networks. Applications such as interactive video, ultra-high definition TV, backup storage, grid computing, e-science, e-health to mention a few, are becoming increasingly attractive and important for the community. Given the high bandwidth requirements and strict service level specifications (SLSs) of such applications, WDM networks equipped with agile devices, such as reconfigurable optical add-drop multiplexers and tunable transceivers integrated with G-MPLS/ASON control-plane technology are advocated as a natural choice for their implementation. SLSs are metrics of a service level agreement (SLA), which is a contract between a customer and network operator. Apart from other candidate parameters, the set-up delay tolerance and connection holding-time have been defined as metrics of SLA.

This work addresses the network connections provisioning problem for the above mentioned demanding applications, by exploiting the time dimension of connections request. The problem is investigated for dynamic networks comprising ideal and nonideal components in their physical layer, and for applications with differentiated set-up delay tolerance and quality of signal requirements. Various strategies for different scenarios are proposed, each strategy combining in a different way the concept of both set-up delay tolerance and connection holding-time awareness. The objectives of all these strategies are to enhance the network connections provisioning capability and to fulfill customers demand, by utilizing the network resources efficiently.

Ort, förlag, år, upplaga, sidor
Linköping: Linköping University Electronic Press, 2012. s. 38
Serie
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1557
Nationell ämneskategori
Elektroteknik och elektronik
Identifikatorer
urn:nbn:se:liu:diva-84795 (URN)LIU-TEK-LIC-2012:42 (Lokalt ID)978-91-7519-740-1 (ISBN)LIU-TEK-LIC-2012:42 (Arkivnummer)LIU-TEK-LIC-2012:42 (OAI)
Presentation
2012-12-05, Signalen, Hus B, Campus Valla, Linköping University, Linköping, 10:30 (Engelska)
Opponent
Handledare
Tillgänglig från: 2012-11-22 Skapad: 2012-10-22 Senast uppdaterad: 2019-12-19Bibliografiskt granskad

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