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ITU-T Study Group 15

ITU-T Study Group 15. Peter Wery Chairman SG 15. PROC. IEE Vol. 113, No. 7, JULY 1966. 36 years later.

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ITU-T Study Group 15

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  1. ITU-T Study Group 15 Peter Wery ChairmanSG 15

  2. PROC. IEE Vol. 113, No. 7, JULY 1966

  3. 36 years later... A limiting factor at present with the fibre guide is that the best readily available low-loss material has a loss of about 1000 dB/km. However, it is foreseen that the present material can be improved, and our team have indications that materials having losses of only tens of dB/km should be forthcoming. Geoffrey Charlish, 26.1.1966

  4. This Presentation • SG 15 overview • Lead Study Group activities • Current challenges • Expected Workshop results

  5. This Presentation • SG 15 overview • Lead Study Group activities • Current challenges • Expected Workshop results

  6. Responsibility and Mandate • Focal point in ITU-T for studies on optical and other transport networks, systems and equipment. This encompasses the development of transmission layer related standards for access, metropolitan and long haul sections of communication networks. • Lead Study Group on: • Access Network Transport (ANT) • Optical Technology

  7. SG15 Objectives • Focal point for global standards on Transport Networks • Market driven and timely standards in major work areas • ‘Value-added’ coordination and cooperation effort • Support ITU-T as preeminent Internat. Stds. Organization • Promote SG 15 standardization activities

  8. Standards driven by market needs • Multi-Megabit/s and Gigabit/s network access • Internet • TV distribution and interactive • Terabyte/s in metropolitan and long haul transport • Optical Internet • DWDM, CWDM • Cost reduction, Scalability, Service Velocity • Switched Optical Network • End-to-end wavelength services

  9. SG 15 - Optical and other Transport Networks WP 1 - Network Access WP 2 - Network Signal Processing WP 3 - OTN Structure WP 4 - OTN Technology WP 5 - Projects and Promotion Organization

  10. Some statistics • Work Program (Questions for study) 19 • Recommendations under development Approx. 80 - 90 • Study Group meeting interval Approx. 8 months • Rapporteur Group meetings Frequently • Work by correspondence (EDH) Continuous • Approval procedure AAP • Rapporteurs 19 • Editors Approx. 65 • SG Representatives etc. 9 • SG meeting participants (Avrg. 97-00/01-02) 347/302 • Number of countries (Admin. and/or ROA) 39/26 • Number of Scient. & Indust. Orgs. (SIO) 74/75

  11. Major work areas • Access network • Broadband optical access • Refinements & enhancements xDSL • Home networking (data on in-premises wiring) • ANT standardization and work plan • Network signal processing • CME in IP based networks • Enhancements Echo Cancellers • Equipment for GSTN and IP interconnection • Interaction of signal processing

  12. Major work areas (cont’d) • Optical Transport Network (OTN) structure • Automatic Switched Optical Network (ASON) • Architecture and interfaces for the OTN • Optical Cross-Connect and Switch functions • Network management and control • OTN technology (terrestrial and submarine) • Coarse and dense WDM, STM-256 signal channels • Optical components & amplifiers (e.g. tunable filters) • Fiber characteristics, more channels/fiber • Transmission technology (Soliton/RZ), long reach

  13. Major work areas (cont’d) • Projects and promotion • Lead SG activities (Projects) • Access Network Transport • Optical Technology • Establish/maintain links inside and outside ITU-T • Promotion tools • SG 15 Web Site, public access • Workshops, seminars • Press Releases • Brochures • Tutorial material

  14. Communication, Cooperation • Key SG 15 communication and cooperation partners: Organization Technical area/Topic • ATM Forum Traffic & network management • DSL Forum Access network • TM Forum Network management • ATIS T1 Access network, SONET/SDH, OTN • ETSI Access network, SDH • ISO/IEC Optical fibers, components • ISOC/IETF Optical transport network Network signal processing • TIA, OIF Optical networks & technology • IEEE Ethernet

  15. This Presentation • SG 15 overview • Lead Study Group activities • Current challenges • Expected Workshop results

  16. WTSC/WTSA Appointments • World Telecommunication Standardization Conference 1996 (WTSC 96) • Appoints SG 15 as Lead Study Group on Access Network Transport In addition • World Telecommunication Standardization Assembly 2000 (WTSA 2000) • Appoints SG 15 as Lead Study Group on Optical Technology

  17. Lead Study Group activities (Projects) • Mandate • Define, maintain overall framework (other SGs, SDOs, Forums/Consortia) • Own Questions • Coordinate, assign and prioritize work in other SGs • Consistent, complete, timely standards • Implementation • Standardization Plan (who, what, when) • Work Plan (holes, lack of progress, priorities) • Provide ‘value added’

  18. Lead Study Group activities (Projects) (cont’d) • Access Network Transport • Standardization and Work Plan established • ANT Standardization & Work Plan • Continuous updating • Road mapping future growth & requirements to year 2010 • Optical Technology • Standardization and Work Plan established • Optical Transport Networks & Technologies Standardization Work Plan • Continuous updating • Mapping of ASTN, GMPLS and OIF terminology • Description of Metropolitan Optical Network (MON) • Web based presentation planned

  19. ANT Standardization Plan • Content Introduction 1.Scope 2. References 3. Definitions 4. Abbreviations 5. ANT Reference Model 6. ANT functionality 7. ANT Interfaces 8. ANT Transmission characteristic 9. Access Network Elements functionality 10. ANT Scenarios 11. Overview of existing standards and activity Annex 1: Reference Scenarios for Correlation of Standards Annex 2: ANT-Relevant Standards Annex 3: List of Abbreviations

  20. ANT Standardization Plan (cont’d) • Scenario 4 – Fiber access • Physical representation • Logical representation

  21. OTNT Standardization Work Plan • Content(status May 2002) 1. General 2. Introduction 3. Scope 4. Abbreviations 5. Definitions 6. OTNT Correspondence and Liaison tracking 7. Overview of existing standards and activity 8. Overview of existing holes, overlaps, conflicts Annex A – Terminology Mapping (ASTN, GMPLS, OIF) Annex B – Other OTNT related organizations Annex C – Re-numbering of ITU-T Recommendations

  22. USER NE USER NE OTN NE OTN NE OTN NE OTNT Standardization Work Plan (cont’d) Global Optical Transport Network Supporting Today's and Future Services OTN IrDI OTN IaDI OTN IrDI OTN IaDI OTN IaDI SDH STM-N Carrier Domain A Carrier Domain B User/carrier may originate/terminate the OTN framing for any digital payload (IP, ATM, SDH,,,) IaDI = Intra-Domain Interface IrDI = Inter-Domain Interface NE = Network Element Interfaces:For single/multichannels with performance monitoring

  23. OTNT Standardization Work Plan (cont’d) • Standardization areas covered • OTNT (variety of aspects) • SDH & SONET • OTN Transport Plane • ASTN/ASON Control Plane

  24. OTNT Standardization Work Plan (cont’d) • Standards organizations referenced & referred to: • ITU-T (SG 4, 13 15) • ANSI T1X1 • TIA FO-2 • ISO/IEC Subcomm. 86A • IETF Sub-IP Area • IEEE 802.3 • OIF • ATMF

  25. This Presentation • SG 15 overview • Lead Study Group activities • Current challenges • Expected Workshop results

  26. OTNT related work in progress • OTN • Gigabit-capable Passive Optical Networks (PON) • Network protection and restoration • Metropolitan Optical Networks • OTN management Information Model (Protocol neutral and specific) • ASTN/ASON • ASON enhancements • Distributed call and connection management (Protocol neutral and specific)

  27. OTNT related work in progress (cont’d) • OTN Technology • Non-zero dispersion fibers for wideband transport • 40Gbit/s, 80 km, single channel system • CWDM applications • Transverse compatibility • Optical system design, terrestrial and submarine (Supplements) • In total approx. 60-70 draft new/revised Recommendations

  28. Some open issues • Bottleneck network access  Fiber to the home • Inconsistent OTN terminology in industry and SDOs • Optical Supervisory Channel (diff. interpretations) • Optical performance monitoring • Ethernet and OTN interworking • Ethernet in the first mile  PON • Ethernet in Metropolitan Optical Networks • Ethernet over Transport Network Architecture • IP directly over fiber • Optical Virtual Private Networks (OVPN)

  29. This Presentation • SG 15 overview • Lead Study Group activities • Current challenges • Expected Workshop results

  30. Expected workshop results • Increased awareness, cooperation & delineation of standards activities • Scope of standards • Confirmation; Reassessment • New topics, areas for standardization • Revised/new Questions; Work Plan • Prioritization • Market needs; Time lines • Other action items

  31. SG 15 Web Site http://www.itu.int/ ITUT/studygroups/ com15/index.html

  32. SG 15 Web Site (cont’d)

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