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Politecnico di Milano Dipartimento di Elettronica e Informazione

Politecnico di Milano Dipartimento di Elettronica e Informazione. Centre Tecnològic De Telecomunicacions de Catalunya. Proposal for joint collaboration CTTC & POLIMI Survivability in all-optical wavelength switching networks. Participants Achille Pattavina Massimo Tornatore

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Politecnico di Milano Dipartimento di Elettronica e Informazione

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  1. Politecnico di Milano Dipartimento di Elettronica e Informazione Centre Tecnològic De Telecomunicacions de Catalunya Proposal for joint collaborationCTTC & POLIMISurvivability in all-optical wavelength switching networks • Participants • Achille Pattavina • Massimo Tornatore • Guido Maier • Raul Muñoz • Ricardo Martinez Zagreb VD-C Meeting 4/09/06

  2. Shared Path Protection • Why SPP? • more efficient use of the network resources • a lower recovery time than dynamic restoration scheme. • Aim: investigate requirements and solutions to apply SPP within next-generation optical network features • dynamic traffic, • distributed control plane, • transparent networks.

  3. Extension of GMPLS-based Control Plane with 10 satellite OCCs Transport network uses G.652 optical fibber (210Km) • All-Optical transport network with three R-OADMS and tunable lasers. GMPLS Network Emulator: (UNI, E-NNI, I-NNI) UNI-enabled IP Router for Dynamic Lambda Request emulation ADRENALINE Architecture • GMPLS-based Intelligent all-Optical Network • GMPLS-based control plane based on Distributed PC-based Optical Connections Controllers (OCCs). • Distributed management plane

  4. POLIMI and CTTC • CTTC is currently implementing SPP over an all-optical network testbed (ADRENALINE) • POLIMI has gained a wide experience on simulative comparison of different SPP approaches • Novel proposals: CAFES, PHOTO POLIMI algorithmic expertise CTTC Testbed experience

  5. Research issues • The implementation of SPP in an all optical scenario raises many algorithmic and implementing problems that will be the main object of this collaboration • classical SPP algorithms have to be specified for a scenario without wavelength conversion • the control information (e.g. network resources and lightpath routing) which is required to run these algorithms testbed has to be carefully defined; • effects and constraints of a distributed GMPLS control plane should be identified and quantified

  6. Some additional points • Each node has its own view of the network • What information OSPF has to carry • WP vs.VWP • Effect of outdated information (propagation and processing delays) • Limiting the control load by thresholds (effect on performance) • (Effects on PHOTO of outdated information. Is it worth to investigate PHOTO in a distributed environment? )

  7. Expected outcome • Analysis and identification of the necessities for applying SPP in all-optical networks without wavelength conversions capability. • Extensions to the routing protocol within a distributed routing scenario to flood the state of the wavelengths for SPP objectives. • Evaluation of the feasibility and scalability of the proposed routing protocol extensions and algorithms for SPP in terms • connection blocking, resource overbuild, algorithm cost computation, amount of flooded information, etc. • Identification, modelling and quantification of the effect due to outdated information in a real distributed or centralized control plane to SPP algorithms performances.

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