1 / 55

Ultra-high-speed all-optical networking technologies for next generation networking

Internet2 Fall 2004 Member Meeting Extreme Networking: Experimental Ultra-High-Speed Networks. Ultra-high-speed all-optical networking technologies for next generation networking. Mikio Yagi, Shiro Ryu (1), and Shoichiro Asano (2)

leroye
Télécharger la présentation

Ultra-high-speed all-optical networking technologies for next generation networking

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Internet2 Fall 2004 Member Meeting Extreme Networking: Experimental Ultra-High-Speed Networks Ultra-high-speed all-optical networking technologies for next generation networking Mikio Yagi, Shiro Ryu (1), and Shoichiro Asano (2) 1: Information and Communication Labs., Japan Telecom Co., Ltd. 2: National Institute of Informatics September 29, 2004

  2. Agenda • Future network features and applications • Key technologies and issues for realization of all-optical network • Our recent activities • Field trial 1 : Application of all-optical regeneration system • Field trial 2 : Application of automatic chromatic dispersion compensator • Conclusion

  3. Future network features and applications

  4. Network applications for world-wide high-speed network • GRID computing • Genome information analysis • High energy and nuclear fusion research • Space and astronomical science • IT-Based Laboratory (ITBL) • Storage area network (SAN)

  5. Bit-rate free • Protocol free • Network topology free • High capacity • Short delay • High security • On demand What is needed for future network ? Global GRID computing Task Result • Communication style • Human to human • Human to computer • Computer to computer

  6. Electrical processing equipments Current network : IP-based Network “PRISM” PRISM: Progressive Revolutionary Integration on Service Media IP based client Customer router GSR DWDM 10G POS ring using MPLS IP based client

  7. PXC PXC PXC PXC PXC PXC All-optical processing equipments Future network: All-optical network Any client signal IP router Photoniccrossconnect DWDM DWDMMeshNetwork Interwork Any client signal GMPLS: Generalized Multi-Protocol Label Switching

  8. Features of all-optical network Protocol free High speed / High capacity Bit-rate free Short transmission delay time Topology free High security On demand These functions are essential for the future network applications.

  9. Key technologies and issues for realization of the all-optical network

  10. Key technologies for the future network (1) • Physical layer • Control plane • Others • Transport layer • Management • Service application

  11. 3 Dimension Micro Electro Mechanical Systems (3D MEMS) Micro mirror array Optical Signal 1㎜ Optical Signal Fiber array Fiber array Micro mirror (MEMS mirror) Key technologies for the future network (2) : Physical layer • Switching technologies on repeater node • Optical crossconnect (OXC)/Photonic crossconnect (PXC) • High-speed Switching • Link aggregation • Optical add/drop multiplexing (OADM) • Optical queuing • All-optical signal processing technologies • All-optical regeneration • 2R regeneration (regeneration and reshaping) • 3R regeneration (regeneration, reshaping, and retiming) • Optical wavelength conversion • Compensation of fiber parameter effect (Chromatic dispersion / Polarization-mode dispersion) • Optical signal quality measurement technology

  12. Key technologies for the future network (3) : Physical layer • Switching technologies on repeater node • Optical cross connect (OXC)/Photonic cross connect (PXC) • High speed Switching • Link aggregation • Optical add/drop multiplexing (OADM) • Optical queuing • All-optical signal processing technologies • All-optical regeneration • 2R regeneration (regeneration and reshaping) • 3R regeneration (regeneration, reshaping, and retiming) • Optical wavelength conversion • Compensation of fiber parameter effect (Chromatic dispersion / Polarization-mode dispersion) • Optical signal quality measurement technology

  13. What’s problem on physical layer ? In the future all-optical network • The route of the path changes dynamically • Network protection/restoration • Reconfiguration of peer-to-peer wavelength path service Fiber parameters along the path are changed after reconfiguration.

  14. Y X Y X Fiber parameters cause signal degradation 40Gbit/s data signal receiver 40Gbit/s data signal transmitter Compensation of signal distortion Y X Signal-to-noise ratio (SNR) Polarization-mode dispersion (PMD) Chromatic dispersion (CD)

  15. Y X Y X Compensation technologies on each effect Y X Signal-to-noise ratio (SNR) Polarization-mode dispersion (PMD) Chromatic dispersion (CD) • All-optical signal regeneration • All-optical 2R regeneration • All-optical 3R regeneration PMD compensator CD compensator

  16. Key technologies for the future network (4) : Physical layer • Switching technologies on repeater node • Optical crossconnect (OXC)/Photonic crossconnect (PXC) • High-speed Switching • Link aggregation • Optical add/drop multiplexing (OADM) • Optical queuing • All-optical signal processing technologies • All-optical regeneration • 2R regeneration (regeneration and reshaping) • 3R regeneration (regeneration, reshaping, and retiming) • Optical wavelength conversion • Compensation of fiber parameter effect (Chromatic dispersion / Polarization-mode dispersion) • Optical signal quality measurement technology

  17. GMPLS λ（Lambda） MPLS SONET/SDH +Label Label Path Fiber Etc. IP Key technologies for the future network (5) : Control plane • Generalized MPLS (Multi-Protocol Label Switching) • Control and signaling mechanisms of MPLS label path have been extended in order to apply those mechanisms to not only label paths, but also SONET/SDH paths, lambda paths and etc. • MPLS is the set of extensions to OSPF, IS-IS, and RSVP to support the routing of paths (aka traffic engineering) • MPlS is a concept that says the MPLS control plane can be leveraged to support routing of lambda paths • GMPLS is the realization of the MPlS concept, created by extended MPLS to support non-packet paths (l’s, time-slots, fibers)

  18. Key technologies for the future network (6) • Physical layer • Control plane • Others • Transport layer • Management • Service application There are a lot of issues to resolve for realization of the all-optical network.

  19. Our recent activities

  20. Super SINET project Super SINET is an ultrahigh-speed network intended to develop and promote Japanese academic researches by strengthening collaboration among leading academic research institutes. • High energy and nuclear fusion • Space and astronomical science • Genome information analysis (bio-informatics) • Supercomputer-interlocking distributed computing (GRID) • Nanotechnology http://www.sinet.ad.jp/english/super_sinet.html

  21. Our challenge • For realization of future ultra-high-speed all-optical network • Physical layer • Field trials • Application of all-optical 2R regeneration system • Application of automatic chromatic dispersion compensation system • Control plane • Service application

  22. Field trial 1:Application of all-optical 2R regeneration system

  23. How can all-optical 2R regeneration be realized? • 2R regeneration : • regeneration and reshaping Input signal Noise of level 1 Amplified amplitude Noise of level 0 Input vs output characteristic of an optical device that has non-linear effect

  24. OUT Output signal IN Noise suppression How can all-optical 2R regeneration be realized? (Cont.) Optical device • 2R regeneration : • regeneration and reshaping Amplified amplitude Optical device Input Output Noise of level 1 Input signal Noise of level 0 An electro-absorption modulator (EAM) has the effect of noise suppression. Input vs output characteristic of an optical device that has non-linear effect

  25. WDM WDM WDM WDM WDM WDM WDM WDM WDM WDM It is necessary to compensate for the degradation. Research background • The optical signal quality is degraded by the loss of the OADM system. • The OADM system causes the signal quality degradation for the through signal at the destination. Optical add/drop multiplexing (OADM)

  26. WDM WDM WDM WDM WDM WDM WDM WDM WDM WDM It is necessary to compensate for the degradation. Research background (Cont.) • The optical signal quality is degraded by the loss of the OADM system. • The OADM system causes the signal quality degradation for the through signal at the destination. 2R regeneration system

  27. 2R regeneration system WDM WDM WDM WDM WDM WDM WDM WDM WDM WDM Research background (Cont.) • This experiment • 40-Gbit/s 12-channel WDM field trial using an installed 320-km-long fiber. • Applied OADM system with an all-optical 2R regeneration system.

  28. National Institute of Informatics (NII) Building Tokyo Station Shinjuku Station 4.5-km-long installed fiber cable 11.7-km-long installed fiber cable Location and cable for the 2R system field trial in Tokyo area Fiber type : SMF Total fiber length : 80 km x 4 spans = 320 km

  29. Our transmission system 40-Gbit/s transmitter 40-Gbit/s receiver Bit-error rate tester (Performance evaluation) Repeater

  30. Performance evaluation : Q-factor on off Histogram m1 - m0 Q = s1 + s0 Q=20dB :: BER= 8×10-24 Q=17dB :: BER= 1×10-12 m1: ON level average value s1: ON level noise standard deviation m0: OFF level average value s0: OFF level noise standard deviation Q-factor ++ Transmission quality ++

  31. WDM WDM Performance evaluation cases 2R regeneration system 3 2 1 • Dropped at 160-km by the OADM ; “Dropped at 160km” • 320-km transmission without 2R; “320km w/o 2R” • 320-km transmission with 2R: “320km with 2R.”

  32. 2R regeneration system 3 2 1 Dropped at 160-km WDM WDM 320-km w/o 2R 320-km with 2R Result of 320-km transmission with OADM / 2R system Q-factor: 16.9dB Q-factor: 18.8dB 0.8dB improvement 1.9dB degradation Q-factor: 17.7dB

  33. OADM system with/without 2R regeneration system 0.8-dB improvement over 320-km transmission with 2R Nearly the same as the quality of the signal dropped at 160-km. From a point of view of the system design, It is preferable that transmission characteristics of the express channel and the dropped channel are equal. Discussion We have confirmed that the all-optical 2R system has the possibility to realize such a condition in an OADM system.

  34. Field trial 2:Application of automatic chromatic dispersion compensator

  35. Influence of chromatic dispersion 40Gbit/s data signal Receiver • When the wavelength path is dynamically reconfigured, accumulated physical parameters including chromatic dispersion (CD) are changed. • CD is one of the most important parameters for the system over 40 Gbit/s. 40Gbit/s data signal Transmitter Compensation of signal quality

  36. Influence of chromatic dispersion (Cont.) 40Gbit/s data signal receiver 40Gbit/s data signal transmitter Compensation of signal quality Tunable chromatic dispersion compensator - Chirped fiber Bragg grating (CFBG) - Input lshort llong Output z llong Group delay small Index of reflection lshort Group delay large Reflect point of input signal depends on wavelength. It causes the difference of group delay.

  37. Automatic chromatic dispersion compensator 40Gbit/s data signal receiver 40Gbit/s data signal transmitter Automatic chromatic dispersion compensator Tunable chromatic dispersion compensator Input Output Signal quality monitoring (Q-factor, Bit-error rate) Device controller Hill-climbing method

  38. Performance evaluation • Rerouting operation • GMPLS signaling • Operation of automatic chromatic dispersion compensator

  39. Sequence of path setup and operation of automatic chromatic dispersion compensator 1. Service request Data plane Automatic chromatic dispersion compensator l-DEMUX l-MUX PXC PXC 40-Gbit/s receiver GMPLSControl plane 2. Path setup 1. Path Setup Request Service plane 4. Service in 1. Service request GMPLS control plane 2. RSVP - PATH ( Path setup ) 3. RSVP - RESV

  40. Sequence of path setup and operation of automatic chromatic dispersion compensator 1. Service request Data plane Automatic chromatic dispersion compensator Automatic chromatic dispersion compensator l-DEMUX l-MUX PXC PXC 40-Gbit/s receiver GMPLSControl plane 2. Path setup 1. Path Setup Request Service plane 4. Service in 1. Service request GMPLS control plane 2. RSVP - PATH ( Path setup ) 3. RSVP - RESV

  41. Recovery time : 40 sec Experimental resultVariation of Q-factor in case of network protection operation • Network protection operation by switching a line between Line1 and Line 2 at second span in every 10 minute. Line2 Line2 Line2 Line2 Line1 Line1 Line1 Line1

  42. Efforts to improve the time for CD compensation- GMPLS multilayer integration –

  43. 40Gbit/s data signal receiver 40Gbit/s data signal transmitter Automatic chromatic dispersion compensator The multilayer integration among a GMPLS control plane, a measurement plane, and a data plane is essential. Make the CD compensation operation faster Quality measurement (Q-factor, BER) takes long time ( ~ 40 sec). Tunable chromatic dispersion compensator Input Output Signal quality monitoring (Q-factor, Bit-error rate) Device controller Measurement of CD makes path setup faster Hill-climbing method

  44. Sequence of the multilayer integration 1. Service request Chromatic dispersion analyzer (receiver) Data plane Chromatic dispersion analyzer (transmitter) l-DEMUX Chromatic dispersion compensator l-MUX PXC PXC 40-Gbit/s receiver PXC GMPLSControl plane 2. Path setup 1. Path Setup Request Service plane 1. Service request GMPLS control plane 2. RSVP - PATH ( Path setup ) 3. RSVP - RESV Measurement plane Data plane

  45. Chromatic dispersion analyzer (receiver) Chromatic dispersion analyzer (transmitter) Sequence of the multilayer integration Data plane Chromatic dispersion analyzer (receiver) Chromatic dispersion analyzer (transmitter) l-DEMUX Chromatic dispersion compensator l-MUX PXC PXC 40-Gbit/s receiver PXC GMPLSControl plane 1. Path Setup Request Service plane 1. Service request GMPLS control plane 2. RSVP - PATH ( Path setup ) 3. RSVP - RESV Measurement plane 4. Data plane setup 5. CD measurement Data plane

  46. Sequence of the multilayer integration Chromatic dispersion analyzer (receiver) Data plane Chromatic dispersion analyzer (receiver) Chromatic dispersion analyzer (transmitter) CD value l-DEMUX Chromatic dispersion compensator Chromatic dispersion compensator l-MUX PXC PXC 40-Gbit/s receiver PXC GMPLSControl plane 1. Path Setup Request Service plane 1. Service request 8. Service in GMPLS control plane 2. RSVP - PATH ( Path setup ) 3. RSVP - RESV Measurement plane 4. Data plane setup 5. CD measurement Data plane 6. Receive the measured CD value 7. Set the value to CD compensator

  47. Third span (31-km NZDSF) First span (66-km NZDSF) Second span SC-DCF SC-DCF SC-DCF Route 1 (35-km SMF) VOA Optical amplifier SC-DCF Route 2 (35-km NZDSF) Optical amplifier Optical amplifier SC-DCF Route 3 (31-km NZDSF) Route 3 (66-km NZDSF) 40-Gbit/s, 24-channel WDM transmitters GMPLS controller GMPLS controller GMPLS controller GMPLS controller GMPLS controller Location and experimental setup of field trial in Kyusyu area Data plane Chromatic dispersion analyzer (receiver) Chromatic dispersion analyzer (transmitter) l-DEMUX Chromatic dispersion compensator l-MUX PXC PXC 40-Gbit/s receiver PXC GMPLScontrol plane Yame Station Kyushu University Tosu Station Kyushu University Fukuoka Station SC-DCF: Slope-compensating dispersion compensation fiber , PXC: Photonic cross-connect

  48. Error count v.s. time in rerouting operation Fig.a : Error count v.s. time in rerouting operation. Fig.b : Error count v.s. time in rerouting operation (details).

  49. Discussion • A field trial of GMPLS multilayer integration among a GMPLS control plane, a measurement plane, and a data plane for ensuring the quality of a 40-Gbit/s wavelength path is effective for the GMPLS all-optical rerouting • The time for the start of the service after a fault was measured to be about 8.4 seconds.

  50. Conclusion

More Related