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Survivability strategies for PCE-based WDM networks offering high reliability performance
KTH, Skolan för informations- och kommunikationsteknik (ICT), Kommunikationssystem, CoS, Optical Network Laboratory (ON Lab).
KTH, Skolan för informations- och kommunikationsteknik (ICT), Kommunikationssystem, CoS, Optical Network Laboratory (ON Lab).ORCID-id: 0000-0003-0525-4491
KTH, Skolan för informations- och kommunikationsteknik (ICT), Kommunikationssystem, CoS, Optical Network Laboratory (ON Lab).ORCID-id: 0000-0002-5636-9910
KTH, Skolan för informations- och kommunikationsteknik (ICT), Kommunikationssystem, CoS, Optical Network Laboratory (ON Lab).ORCID-id: 0000-0001-6704-6554
2013 (Engelska)Ingår i: National Fiber Optic Engineers Conference, NFOEC 2013, Optical Society of America, 2013Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Two approaches based on backup reprovisioning and path restoration are proposed for dynamic failure recovery in survivable, PCE-based, WDM networks. Results show that proposed schemes can achieve high connection availability in double link failure scenarios.

Ort, förlag, år, upplaga, sidor
Optical Society of America, 2013.
Nyckelord [en]
Backup reprovisioning, Connection availability, Double link failures, Dynamic failures, High reliability, Path restoration, WDM networks, Fiber optics
Nationell ämneskategori
Elektroteknik och elektronik
Identifikatorer
URN: urn:nbn:se:kth:diva-116506DOI: 10.1364/nfoec.2013.ntu3f.4ISI: 000325101400201Scopus ID: 2-s2.0-84887343615OAI: oai:DiVA.org:kth-116506DiVA, id: diva2:589972
Konferens
National Fiber Optic Engineers Conference, NFOEC 2013, 17-21 March 2013, Anaheim, CA
Anmärkning

Part of proceedings: ISBN 978-1-55752-962-6

Duplicate register in Scopus 2-s2.0-84881051152

QC 20200902

Tillgänglig från: 2013-01-21 Skapad: 2013-01-21 Senast uppdaterad: 2024-03-15Bibliografiskt granskad
Ingår i avhandling
1. Dynamic Resource Provisioning and Survivability Strategies in Optical Networks
Öppna denna publikation i ny flik eller fönster >>Dynamic Resource Provisioning and Survivability Strategies in Optical Networks
2013 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Optical networks based on Wavelength Division Multiplexing (WDM) technology show many clear benefits in terms of high capacity, flexibility and low power consumption. All these benefits make WDM networks the preferred choice for today’s and future transports solutions which are strongly driven by a plethora of emerging online services.

In such a scenario, capability to provide high capacity during the service provisioning phase is of course very important, but it is not the only requirement that plays a central role. Traffic dynamicity is another essential aspect to consider because in many scenarios, e.g., in the case of real time multimedia services, the connections are expected to be provisioned and torn down quickly and relatively frequently. High traffic dynamicity may put a strain on the network control and management operations (i.e., the overhead due to control message exchange can grow rapidly) that coordinate any provisioning mechanisms. Furthermore, survivability, in the presence of new failure scenarios that goes beyond the single failure assumption, is still of the utmost importance to minimize the network disruptions and data losses. In other words, protection against any possible future failure scenario where multiple faults may struck simultaneously, asks for highly reliable provisioning solutions.

The above consideration have a general validity i.e., can be equally applied to any network segment and not just limited to the core part. So, we also address the problem of service provisioning in the access paradigm. Long reach Passive Optical Networks (PONs) are gaining popularity due to their cost, reach, and bandwidth advantages in the access region. In PON, the design of an efficient bandwidth sharing mechanism between multiple subscribers in the upstream direction is crucial. In addition, Long Reach PONs (LR-PONs) introduces additional challenges in terms of packet delay and network throughput, due to their extended reach. It becomes apparent that effective solutions to the connection provisioning problem in both the core and access optical networks with respect to the considerations made above can ensure a truly optimal end-to-end connectivity while making an efficient usage of resources.

The first part of this thesis focuses on a control and management framework specifically designed for concurrent resource optimization in WDM-based optical networks in a highly dynamic traffic scenario. The framework and the proposed provisioning strategies are specifically designed with the objective of: (i) allowing for a reduction of the blocking probability and the control overhead in a Path Computation Element (PCE)-based network architecture, (ii)  optimizing resource utilization for a traffic scenario that require services with diverse survivability requirements which are achieved by means of  dedicated and shared path-protection, and (iii) designing provisioning mechanism that guarantees high connection availability levels in Double Link Failures (DLF) scenarios. The presented results show that the proposed dynamic provisioning approach can significantly improve the network blocking performance while making an efficient use of primary/backup resources whenever protection is required by the provisioned services. Furthermore, the proposed DLF schemes show good performance in terms of minimizing disruption periods, and allowing for enhanced network robustness when specific services require high connection availability levels.

In the second part of this thesis, we propose efficient resource provisioning strategies for LR-PON. The objective is to optimize the bandwidth allocation in LR-PONs, in particular to: (i) identify the performance limitations associated with traditional (short reach) TDM-PON based Dynamic Bandwidth Allocation (DBA) algorithms when employed in long reach scenarios, and (ii) devise efficient DBA algorithms that can mitigate the performance limitations imposed by an extended reach. Our proposed schemes show noticeable performance gains when compared with conventional DBA algorithms for short-reach PON as well as specifically devised approaches for long reach.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH Royal Institute of Technology, 2013. s. xii, 90
Serie
Trita-ICT-COS, ISSN 1653-6347 ; 1302
Nyckelord
optical networks, passive optical networks, wavelength, routing, Survivability, protection, restoration
Nationell ämneskategori
Kommunikationssystem
Forskningsämne
SRA - Informations- och kommunikationsteknik
Identifikatorer
urn:nbn:se:kth:diva-122279 (URN)978-91-7501-726-6 (ISBN)
Disputation
2013-06-11, Sal D, Forum, Isafjordsgatan 39, Kista, 10:00 (Engelska)
Opponent
Handledare
Anmärkning

QC 20130520

Tillgänglig från: 2013-05-20 Skapad: 2013-05-16 Senast uppdaterad: 2022-06-24Bibliografiskt granskad

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Ahmed, JawwadCavdar, CicekMonti, PaoloWosinska, Lena

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Ahmed, JawwadCavdar, CicekMonti, PaoloWosinska, Lena
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Optical Network Laboratory (ON Lab)
Elektroteknik och elektronik

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