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VD-S Optical Switching Systems - Cutting-Edge Research Topics and Key Partners

Explore the latest advancements in optical switching research, including wavelength conversion, multicast architecture, and hybrid switch architectures. Engage with top international partners and participate in collaborative joint activities.

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VD-S Optical Switching Systems - Cutting-Edge Research Topics and Key Partners

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  1. Virtual Department S (VD-S) Optical Switching Systems Leaders: Lars Dittmann COM-DTU Kyriakos Vlachos, RACTI/UPATRAS Contact: ld@com.dtu.dk, kvlachos@ceid.upatras.gr

  2. PARTNERS PARTNERS VD-S: Optical Switching Project Steps - Action Tasks List of VD-S key issues and planned activities Joint Activity Proposals European Commission Yearly VD-S technical report 16 partners involved: DTU NTUA UEssex SSSUP UPCT PoliTo AIT UPATRAS UNIBO TUW IBBT KTH PoliMi GET ORC UPV

  3. VD-S: Optical Switching Research Topics • Topic / Task 1 • Wavelength Conversion • Recovery Switching • Quality of Service in switches • Optical Signal Monitoring • Physical Impairment Based Switching • Optical Clock Recovery • Wavelength Conversion by nonlinear effects

  4. VD-S: Optical Switching • Topic/Task 2 • Optical Multicast Architecture • Optical Packet Compression • OCDM encoders/decoders • 2R Regeneration • Optical flip-flops • Optical packet switching • Topic/Task 3 • Hybrid Switch Architectures • GMPLS optical switch nodes • Contention Resolution Schemes • Optical Buffering • OTDM time-slot switching • Multi-wavelength regeneration

  5. VD-S: Optical Switching • Key Issues – Map of partners’ activities

  6. VD-S: Optical Switching • Key Issues – Map of partners’ activities

  7. VD-S: Optical Switching • Key Issues – Map of partners’ activities >8 Mobility actions received and >12 Joint Activity Proposals

  8. VD-S: Optical Switching • Joint Activity Proposals • GET (Telecom Paris) & Eindhoven University • GET (Telecom Paris)& COM-DTU • ICCS/NTUA& RACTI/UPATRAS • ICCS/NTUA & IBBT/UGhent • ICCS/NTUA & RESIT/AIT • RACTI/UPATRAS &IBBT/UGhent • RACTI/UPATRAS & RESIT/AIT • COM-DTU & UPVLC • COM-DTU & SSSUP • SSSUP & COM-DTU • IT & UPVLC • PoliTo & PoliMi & UniBo

  9. VD-S: Optical Switching • Mobility Actions • GET (Telecom Paris) & Eindhoven University • GET (Telecom Paris) & COM-DTU • RACTI/UPATRAS & ICCS/NTUA • RACTI/UPATRAS & IBBT/Ughent • COM-DTU & UPVLC • IT & UPVLC • COM-DTU & SSSUP • SSSUP & COM-DTU

  10. ICCS/NTUA Universidad Politécnica de Valencia (UPVLC) VD-S: Optical Switching Partners’ Section RACTI/UPATRAS

  11. VD-S: Optical Switching COM-DTU participates in the following activities • Label assignment schemes for GMPLS optical networks • Multi-domain Quality-of-Service • Recovery switching • Optical Signal Monitoring COM-DTU is taking part in several collaborations e.g. with UPVLC, SSSUP and more…

  12. Suggested Vector l1 l3 l1 l2 l4 l1 l3 l4 Novel scheme: Designed to avoid WC by ranking labels Standard protocol extensions:Not designed to avoid WC Label Set = NP Scheme:Select label at destination and propagate upstream until WC is required Sugg. Label = l2 PATH PATH PATH l1 Asource B C Ddest l2 l3 l4 RESV RESV RESV l1 l1 l1 Label Assignment Schemes • Different label preference schemes: • No Preference (NP) • Label Set (LS) • Suggested Label (SL) • Suggested Vector (SV) 0 1 0 0 0 0 1 0 Source: Andriolli et al. HPSR 2006

  13. Label Assignment Schemes II Evaluate the performance of these label assignment schemes Provisioning study: - Connection setupand teardown - (Un)limited WC Recovery study: - Span and Local-to-egress restoration - Limited WC Performance metrics: - WC usage - Blocking probability Performance metrics: - WC usage - Restoration %

  14. VD-S: Optical Switching Universidad Politécnica de Valencia (UPVLC) Main research lines of UPVLC (recent/actual EU-projects) • Radio-over fibre systems (OBANET, GANDALF) • Optical communications (TOPRATE, LASAGNE) • Photonic Crystals (SABIO, PHOLOGIC)

  15. VD-S: Optical Switching Universidad Politécnica de Valencia (UPVLC) E-photon activities I • All-optical wavelength conversion by FWM • Optimisation of non-linear effect using optical subcarrier* • All-optical signal processing: FLIP-FLOPS • Development of all-optical flip-flop based on SOA-MZI • Employing all-optical FF into a complex router architecture** * In collaboration with COM-DTU (**IT, Portugal)

  16. VD-S: Optical Switching Universidad Politécnica de Valencia (UPVLC) E-photon activities II • All-optical packet switching • Development of a new all-optical packet switching architecture based on wavelength switching (theoretical analysis, numerical simulations and experimental performance evaluations). • Integration of the processing blocks and fabrication of prototypes.

  17. ICCS/NTUA VD-S: Optical Switching • Design and evaluation of node subsystems implemented with integrated components • Evaluation of previously reported all-optical network node designs • Identification of key network functionalities required in packet-switched nodes • Use of integrated all-optical switching devices to implement subsystems that perform intelligent node functionalities

  18. ICCS/NTUA VD-S: Optical Switching • Demonstration of contention resolution schemes compatible with proposed node architectures • FDL Based Buffers • Space Domain (Deflection) • Wavelength(Wavelength Conversion) • Design and evaluation of all-optical nonlinear fiber switches • Implementation of an optically controlled 2x2 Exchange/Bypass switchwith the use of a Bismuth Oxide (Bi2O3) based nonlinear fiber (Bi-NLF) • Experimental demonstration of the 2x2 switch at 40 Gb/s

  19. Point-to-Point WDM – Pure Packet Switching Requires big IP routers Packet processing overhead Maximum transmission resource efficiency Poor scalability, Good flexibility Wavelength Switched (end-to-end) – ASON Lowering IP router requirements Reduced packet handling Low transmission resource efficiency Good scalability, Mediocre flexibility VD-S: Optical Switching RACTI/UPATRAS • Hybrid Optical Switching

  20. Hybrid Switching combines wavelength and packet switching It is based on ASON ASON react to long term traffic pattern variations by reconfiguring the wavelength paths VD-S: Optical Switching RACTI/UPATRAS • To absorb temporal overloadsone can transmit packets • during the idle periods of established lightpaths or (ORION architecture) • Prior the actual data transmission (SLIP-IN architecture) • Hybrid switching enables full sharing of all wavelengths on a link

  21. VD-S: Optical Switching • Currently, prototyping hybrid switch/router • Definition of the switch control system

  22. Switch Control System VD-S: Optical Switching • Issues to be addressed • Distributed vs. centralized schemes • Impact of inband signalling • Impact of propagation delays (folded bus) • Integration with scheduling scheme • Implementation complexity • Multistage scalability

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