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Virtual Department S (VD-S)

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. PARTNERS. PARTNERS. VD-S: Optical Switching . Project Steps - Action Tasks.

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Virtual Department S (VD-S)

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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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