1 PW

1
ITU-T Study Group 15
Peter Wery Chairman SG 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
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) 347/30
  2
• 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 (contd)

• 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 (contd)

• 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) (contd)

• 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 (contd)

• 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
OTNT Standardization Work Plan (contd)

• 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 InterfacesFor
single/multichannels with performance monitoring
23
OTNT Standardization Work Plan (contd)

• Standardization areas covered
• OTNT (variety of aspects)
• SDH SONET
• OTN Transport Plane
• ASTN/ASON Control Plane

24
OTNT Standardization Work Plan (contd)

• 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 (contd)

• 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/studygrou
ps/ com15/index.html
32
SG 15 Web Site (contd)