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Reducing Blocking Probability in Dynamic WDM Networks by Rerouting and set-up Delay Tolerance
Linköping University, Department of Electrical Engineering, Information Coding. Linköping University, The Institute of Technology.
Linköping University, Department of Electrical Engineering, Information Coding. Linköping University, The Institute of Technology.
2011 (English)In: 17th IEEE International Conference on Networks (ICON), 2011, IEEE , 2011, 195-200 p.Conference paper, Published paper (Refereed)
Abstract [en]

With the emergence of bandwidth intensive applications new methodologies need to be developed for improvement of network blocking performance, without supplying extra resources in dynamic wavelength-division-multiplexing (WDM) networks. Rerouting is one among the viable and cost-effective solutions to reduce the blocking probability (BP) of optical WDM networks. Similarly, set-up delay tolerance, a metric of service level agreement (SLA) has been exploited in [1]-[3] for improvement in network BP. In this paper, we study the rerouting in dynamic WDM network and analyze two different lightpath rerouting strategies. Moreover, we investigate further improvement in network BP by exploiting these rerouting techniques for network provisioned with set-up delay tolerance. Through extensive simulation studies, we confirm that the rerouting strategies decrease the BP substantially for network provisioned with set-up delay tolerance, even for smaller set-up delay tolerance value i.e. when the connection requests are impatient to wait for provisioning in the network. However, it also reduce BP significantly even when the network is not provisioned with set-up delay tolerance.

Place, publisher, year, edition, pages
IEEE , 2011. 195-200 p.
Series
IEEE International Conference on Networks, ISSN 1556-6463 ; 2011
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-85545DOI: 10.1109/ICON.2011.6168474ISBN: 978-1-4577-1824-3 (print)OAI: oai:DiVA.org:liu-85545DiVA: diva2:571462
Conference
17th IEEE International Conference on Networks (ICON), 14-16 Dec., Singapore
Available from: 2012-11-22 Created: 2012-11-22 Last updated: 2012-11-22Bibliographically approved
In thesis
1. Connections Provisioning Strategies for dynamic WDM networks
Open this publication in new window or tab >>Connections Provisioning Strategies for dynamic WDM networks
2012 (English)Licentiate thesis, comprehensive summary (Other academic)
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.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2012. 38 p.
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1557
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:liu:diva-84795 (URN)LIU-TEK-LIC-2012:42 (Local ID)978-91-7519-740-1 (ISBN)LIU-TEK-LIC-2012:42 (Archive number)LIU-TEK-LIC-2012:42 (OAI)
Presentation
2012-12-05, Signalen, Hus B, Campus Valla, Linköping University, Linköping, 10:30 (English)
Opponent
Supervisors
Available from: 2012-11-22 Created: 2012-10-22 Last updated: 2012-11-26Bibliographically approved

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Muhammad, AjmalForchheimer, Robert

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