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Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 Innovations for Digital Inclusion Virgilio Puglia Olga Zadedyurina.

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Presentation on theme: "Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 Innovations for Digital Inclusion Virgilio Puglia Olga Zadedyurina."— Presentation transcript:

1 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 Innovations for Digital Inclusion Virgilio Puglia Olga Zadedyurina OPTICAL TRANSPORT NETWORKS: FROM ALL-OPTICAL TO DIGITAL

2 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 2 Outlines Traditional DWDM based on OTN (Optical Transport Network) ITU-T G.872; IPoDWDM; ODN (Optical Digital Network);

3 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 3 Introduction IP traffic today becomes dominant: New application based on IP (video communication, P2P, etc.); Old application migrate to IP (ex. SS7); IP traffic has overcome capacity of currently used wavelength 10Gb/s; Today trend/evolution is: Eliminate SDH/SONET layer; Move Transport from Optical to Digital;

4 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 4 Traditional DWDM as an OTN DWDM is a fully optical network which provides transparency: only 1R regeneration (optical amplification-equalization and CD compensation); theoretically the signal can be delivered from every ONE to any other. Traditional (OTN) approach becomes hardly realizable for big network;

5 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 5 IPoDWDM Approach Insert IP traffic into DWDM without mapping into SDH frame; Integration of DWDM transponders directly into IP switch/router. IPoDWDM OTN Transponder G.709 IP routers Transponder G.709 IP routers Transponder MUX Colored interface Gray interface Transponder

6 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 6 IPoDWDM intelligence Preemptive traffic protection becomes possible OTN BER Corrected bits Optical Impaiments FEC Limit Working path Lost data Protection p. POS on router Transponder IP Layer SDH/DWDM Layer LOF IP Layer + G.709 on router IPoDWDM BER Corrected bits Optical Impaiments FEC Limit Work pathProtection path Switch threshold

7 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 7 Optical Digital Network Approach The philosophy of ODN is based on O-E-O conversion whenever it is possible. OTN manipulate analogical wavelengths; ODN manipulate digital bits.

8 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 8 Network Layers: OTN vs ODN OTM0 Physical Section (OPSO) Optical Transmission Section (OTS) Band Multiplex Section (BMS) Optical Digital Channel (ODCh) Optical Channel Transport Unit (OTU) Optical Channel Data Unit (ODU) Optical Channel Payload Unit (OPU) IP ATM Ethernet STM-N Digital Analog OTM0 (not colored, no OSC) Optical Transport Module (OTM-n, n>1) OTM0 Physical Section (OPSO) Optical Transmission Section(OTS) Optical Multiplex Section (OMS) Optical Channel (OCh) Optical Channel Transport Unit (OTU) Optical Channel Data Unit (ODU) Optical Channel Payload Unit (OPU) IP ATM Ethernet STM-N Digital Analog OTM0 (not colored, no OSC) Optical Transport Module (OTM-n, n>1) OTN ODN

9 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 9 ODN advantages Each OADM site implements 3R regeneration: the signal is cleaned up from noise and others distortion; It becomes possible to implement higher number of Channels -160 (C band, spacing 25 GHz); The network lose transparency.

10 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 10 ODADM Description MBM West Line O-E FEC Digital W. DSP Matrix To interface modules MBM East Line O-E FEC Digital W. DSP Matrix To interface modules Specific Interface Module Electrical connection Optical connection Optical Spliter Optical pass-through

11 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 11 RECONCILATION BETWEEN THE APPROACHES To integrate different approach the existing OTN network must support Alien Wavelets (ITU-T G.698.2) IPoDWDM is easy to integrate into OTN; IPoDWDM is easy to integrate into ODN but not efficiently; ODN can be integrate into OTN using an optical band split filter.

12 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 12 Example of ODN-OTN integration The majority of deployed DWDM networks are equipped with 100GHz lambda spacing while transponders have stability for 50GHz spacing. Even frequencies Odd frequencies Ghz West Line East Line 50Ghz-100Ghz Filter C-Band ODADM C-Band ROADM 100 Ghz

13 Capacity Evolution 10 Gb/s -> 40 Gb/s -> 100 Gb/s - CD increases and PMD appears; ODN and IPoDWDM: - the limit of 160 channels (L+C band) ODN: - due to E-O-E no dispersion problems. - granularity of PIC is inflexible parameter (today either 10 or 40 Gb/s based) New capacities are being studied by IEEE 802.3ba G should standardize new interfaces Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 13

14 Conclusions OTN, IPoDWDM, ODN approaches analyzed; IPoDWDM and ODN are seen as very promissing; Examples on integration of both technologies; Stimulus for further research and standardization activities; Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 14

15 Back up The following slide are for back up

16 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 16 OTN Network Elements OLT (Optical Line Terminal) OADM/ROADM (Optical Add Drop Multiplexer) also Reconfigurable OLA (Optical Line Amplifier) OXC (Optical Cross-Connect) OTS OMS Och (not terminated in OADM site) Client (not terminated in OADM site) OLTOADMOLTOLA

17 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 17 IPoDWDM Network Elements OTS OMS DWDM MUX/DMUX Optical fibre Optical Line Amplifier Optical colored interface Client-OCh-OTU-ODU-OPU (yellow & green lambda) OCh - Optical Channel OMS - Optical Multiplex Section ONE - Optical Network Element OTS - Optical Transmission Section OTU - Optical Channel Transport Unit ODU - Optical Channel Data Unit OPU - Optical Channel Payload Unit G black-link IP Router Client-OCh-OTU-ODU-OPU (red & blue lambda) Client-OCh-OTU-ODU- OPU(red & blue lambda)

18 Mar del Plata, Argentina, 31 Aug – 1 Sep 2009 ITU-T Kaleidoscope 2009 – Innovations for Digital Inclusion 18 ODN Network Elements Client MBM (Multiplexing Band Module) Electrical connection OLA (Optical Line Amplifier) Optical connection OTS BMS ODCh ODCh - Optical Channel OTS - Optical Transmission Section BMS - Band Multiplex Section DNE DNE - Digital Network Element OPU ODU OTU OTU - Optical Channel Transport Unit ODU - Optical Channel Data Unit OPU - Optical Channel Payload Unit


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