Pune, India, 13 – 15 December 2010 ITU-T Kaleidoscope 2010 Beyond the Internet? - Innovations for...

Pune, India, 13 – 15 December 2010

ITU-T Kaleidoscope 2010Beyond the Internet? - Innovations for

future networks and services

Helmut Schink,Vice Chair of SG 15

[email protected]

Trends in Transport Standards

2Pune, India, 13 – 15 December 2010

ITU-T Structure

Telecommunication Standardization Advisory Group

Telecommunication Standardization Advisory Group

WTSA World TelecommunicationStandardization Assembly

Study GroupStudy Group SGSG

Workshops,

Seminars,Symposia

…

IPR Ad hoc

Working Party

Questions: Develop Recommendations

SGSG

WP WP WP

Q Q Q

Q Q Q

Focus Group


Study Group 15: Overview

General area of study is on “Optical transport networks and access network infrastructures”

SG 15 is the focal point in ITU T for the development of standards on optical and other transport network infrastructures, systems, equipment, optical fibres, and the corresponding control plane technologies to enable the evolution toward intelligent transport networks. This encompasses the development of related standards for the customer premises, access, metropolitan and long haul sections of communication networks.


Optical Access

Metallic Access

Home / Access Long Haul

Terrestrial & Submarine

/ Regional

Study Group 15: Overview

5Lisbon, Portugal, 24-25 February 2010

Projects and Opportunities SG 15

Major projectsLead SG on access network transportLead SG on optical technologyLead SG on optical transport networks

New opportunitiesHome networkingEnergy managementPower savingHome and commercial building automation transceiversNew customer premises cablingInteroperability testing (e.g. with FTTH Council Europe)Packet TransportDevice Management


http://www.itu.int/ITU-T/studygroups/com15/ant/

http://www.itu.int/ITU-T/studygroups/com15/otn/

http://www.itu.int/ITU-T/studygroups/com15/otn/


SG 15 Management

Chair: Yoichi Maeda, TTCVice-Chairs, WP Chairs:

Sadegh Abbasi Shahkooh, IranBaker Baker, SyriaJúlio Cesar Fonseca, BrasilViktor Katok, UkraineFrancesco Montalti, WP 2, Telecom ItaliaHelmut Schink, Nokia Siemens NetworksTom Starr, WP 1, AT&TSteve Trowbridge, WP 3, Alcatel LucentShaohua Yu, China

Counsellor: Greg Jones

Major front lines

Outside plant techniques for easy, environmentally friendly installationFibres: rubustness and low water peakHigher speed and lower power consumption in

home networkDSL copper accessFiber access

Common OAM mechanisms for MPLSBeyond 100G long haul opticsSyncronisation e.g. for backhaul


L. 83 “Low impact minitrench installation L. 83 “Low impact minitrench installation techniques”techniques”

► Installation of mini ducts structures inside a small dimension trench: width less than 5 cm and depth in the range 20-30 cm (compared with 10x30 cm of the conventional one)

► Possibility of installing up to 3 linear arrays of 5 mini ducts 10/14 mm directly buried

► Use of low environmental impact trenching machines


9

9 Pune, India, 13 – 15 December 2010

Solutions for installation of ducts and cables inSolutions for installation of ducts and cables inan occupied infrastructuresan occupied infrastructures

Outfitting of existing ducts (telcos, street lighting, power..) with10/12 mm mini ducts and use of completely dielectric minicables

Separation of the telecommunication access points with the use of reduced dimensions manholes

10

Q7/15 Q7/15 Work in ProgressWork in Progress

L.distr “Customer and distribution boxes and terminals”

L.drop “Pre-terminated fibre drop cables & hardened connectors”

L.modc “Environmental protection of optical devices and optical connectivity in outside plant conditions”

L.oxcon “Outdoor optical cross connect cabinets

Need of new Recommendation on field mountable connector technologies

•Optimization of space•Unbundling?



11

ITU-T documents give guidance on how to use the available spectrum

Third window“1500-nm”Second window

“1300-nm”First window“850-nm”

Fiber Spectrum

600

0.1

(nm)

0.2

0.5

1.0

2.0

5.0

10

Att

enuati

on (

dB

/km

)

800 1000 1200 1400 1600 1800

Standard fiber

AllWave® Fiber

US1310nm

DS1490nm

V1550nm

US1270nm

DS1580nm

GPON10G-PON

(D)WDM PON

Water peak

RayleighScattering

Absorption


G. 657 “Bending loss insensitive single-mode fibres”G. 657 “Bending loss insensitive single-mode fibres”

G.657 A (G.652 compliant) A1 fibre 10 mm bending radiusA2 fibre 7.5 mm bending radius

G.657 B (not G.652 compliant) B2 fibre 7.5 mm bending radiusB3 fibre 5 mm bending radius

Following issues are being addressed as the future study points:- possibility of A3 fibre- splicing to G.652 fibre (level of compliance)- wavelength dependence of the transmission characteristics

G.652G.657 A1G.657 A2 / B2

G.657 B3

Specified loss in dB for 1 turn at 1550 nm for radius:

Bending Radius

10 mm 7.5 mm 5 mm

G. 657A1 <0.75 - -

G. 657A2 / B2 <0.1 <0.5 -

G. 657B3 <0.03 <0.08 <0.15


Available Fiber Access Technologies

A) Direct Fiber (Point to Point)• Reach: ~20Km• Future proof architecture• Protocol independent• Completely passive ODN• Follows established telco wiring practice• High CO/LO Fiber Management cost• Un-economical for countrywide FTTH

C) G-PON G.984 • Reach: ~20Km• Simplified Fiber management• Low cost passive OSP (no PSU, MNS)• Low power consumption• Low OpEx• Video Broadcast (DS) • Bandwidth sharing in US and DS• ONT must filter rogue channels• Security (MBH port shared with FTTH subscriber?)• Splitter attenuation limits tree size

Cabinet /Basement

D) WDM-PON• Reach: ~20Km• Passive ODN, symmetric BW• Independent Lambda per subscriber• Protocol Independent• Reach amplification possible• Reduced OSP costs, single fiber• Security per line• Easy BW upgrades• Filters complicate OSP design

B) AON (Active Optical Network)• Reach: up to 40Km, (typ. ~7-15Km)• Easy BW upgrades• Flexible user & line rate deployment• Simple deployment • Shared Bandwidth• Requires active equipment• Increases OSP costs• Increased OpEx

2.5G DS / 1.25G US

10/100/1000bT 1 – 10G

Athermal DWDMFilter

Passive Splitter

EthernetSwitch


Other/future Fiber Access Technologies

F) 10G-PON G.987• Reach: ~60Km• Passive OSP• Migration from G-PON• Split 1:64 / 1:128• Low power• Redundancy options

10G DS / 2.5G US

Lambda per subscriber

Filter(Optional)

Passive Splitter

Passive Splitter

E) UD-WDM• Reach: up to 100Km• Passive OSP• Virtual Point to Point architecture• Lambda per subscriber / service• Colourless design, tunable ONT• High split (up to 1:1000)• Any packet transport format• Low latency and delay• Redundancy options

G) CWDM+TDM-PON• Reach: up to 60Km• Strong service separation• Reduced fiber count, CO consolidation possible• CWDM filter in ODN


Vectored VDSL2 enables up to 100 Mb/s

Far-end crosstalk (FEXT) greatly reduces VDSL2 performance. Near-end crosstalk is not problem since VDSL2 uses different frequency band for upstream and downstream.

DSLAM

•A vectored system sends “pilot” signals to learn the crosstalk coupling between all the lines in the cable

•Each transmitter “precodes” its signal to compensate for the FEXT from the other primary disturbing lines, thereby offsetting the effects of the crosstalk

•In April 2010 the ITU-T approved the G.993.5 standard for VDSL2 vectoring

•VDSL2 bit-rate performance is nearly doubled by cancelling the FEXT

FEXT


Unified Home Networking Standards

-G.hn supports home networking rates up to 1 Gb/s-One standard for in-home coax, twisted pair, and power wires-Support of IPTV with Multicast and full QoS (quality of service)-Relay-node operating enable excellent coverage throughout the premises-Very low complexity home networking (G.9955) being developed to support Smart Grid energy management



ITU-T WP 1/15ITU-T WP 1/15Passive Optical Network accessPassive Optical Network access

Recommendations in ForceG.983 BPON (622 / 155 Mbps)G.984 GPON (2.4 / 1.2 Gbps)G.985 point-to-point EPON (100 Mbps)G.986 point-to-point EPON (1 Gbps)G.987 XGPON (10 / 2.5 Gbps) – SR and PMD layers

Work in progress for June 2010G.987 XGPON (10 / 2.5 Gbps) – TC layerG.988 Generic OMCI (PON management)

Further workG.987 XGPON2 (10 / 10 Gbps) ?

WP3/15 - Transport Network StructureMatrix Organization and key relationships

19Pune, 15 December 2010

Q3/15 Coordination, TerminologyLead SG activities (OTNT SWP)

Q9/15 Equipment, PerformanceNetwork Protection/Restoration

Q10/15 OAM, Services

Q11/15 InterfacesStructures & Mapping

Q12/15 Architecture

Q13/15 Timing &Synchronization

Q14/15 Management &Control

Q15/15 TestEquipment

CircuitTransport

PacketTransport

OTN

SDH

PDH

Ethernetover

Transport(EOT)

MPLS-TP

IEEE802

MEF

IETF

OIF

TMF

Optical Transport Network (OTN) Evolution

OTN Heirarchy recently extended “at both ends” to support 40/100G services per wavelength and groom at GbE (1000BASE-X) granularityNew Flexible ODU (ODUflex) supports future Constant bit-rate (CBR) clients and arbitrarily sized packet flows

ODUflex• Two flavors of ODUflex standardized

Circuit ODUflex• Supports any possible client bit rate as a

service in circuit transport networks• CBR clients use a bit-sync mapping into

ODUflex (239/238xthe client rate) Packet ODUflex

• Creates variable size packet trunks (containing GFP-F mapped packet data) for transporting packet flows using L1 switching of a LO ODU

• In principle, can be of any size, but in a practical implementation it will be chosen to be multiples of the lowest tributary slot size in the network

• Similar to VCAT (virtual concatenation), but avoids differential delay problem by constraining the entire ODUflex to be carried over the same higher order ODUk, and provides one manageable transport entity per service (while also limiting the application to ODUflex that fits within one higher order ODUk)

HO ODUk ()

ODUj (not flex)

ODUflex nn FC PHY

ODUflex mN Eth PHY

TDM CBR

HO ODUk ()

ODUj (not flex)

ODUflex nn FC PHY

ODUflex mN Eth PHY

TDM CBR

HO ODUk ()

ODUflex 1

ODUflex m

ODUj (not flex)

Logical Flow(VLAN #1)

Eth PHY

ODUflex nLogical flow(VLAN #n)

N Eth PHY

TDM CBR

HO ODUk ()

ODUflex 1

ODUflex m

ODUj (not flex)

Logical Flow(VLAN #1)

Eth PHY

ODUflex nLogical flow(VLAN #n)

N Eth PHY

TDM CBR

ODU k

ODUflex

ODUk

Circuit ODUflex

ODUflex Packet ODUflex

BROADBAND NETWORKS

MPLS(-TP) LSP used as transport technology

GMPLS used as LSP-TP control plane

LSP bandwidths will exceed 0.5 Gb/s

Transport Technology to suitany required granularity

Ethernet802.3

LSP

LSP

LSP

EV

C/P

W/IP

EV

C/P

W/IP

EV

C/P

W/IP

EV

C/P

W/IP

EV

C/P

W/IP

>0.5 Gb/s

tra

ffic

Ethernet802.3

LS

P

LS

P LS

PE

VC

/PW

/IPE

VC

/PW

/IP

EV

C/P

W/IP

EV

C/P

W/IP

EV

C/P

W/IP

LS

PLS

PE

VC

/PW

/IPE

VC

/PW

/IPE

VC

/PW

/IPE

VC

/PW

/IP

BW growthfewer LSPs

tra

ffi

c

ULTRA-BROADBAND NETWORKS

OTN ODU(flex) provides a greener UB LSP alternative

GMPLS used as ODU control plane

Operators can route packet flows in future through sub-Lambda-LSPs and Lambda-LSPs

ULTRA-BROADBAND NETWORKS

OTN ODU(flex) provides a greener UB LSP alternative

GMPLS used as ODU control plane

Operators can route packet flows in future through sub-Lambda-LSPs and Lambda-LSPs

OTUkOTUk

HO ODUk

OD

Ufle

x

OD

U O

DU

flex

EC

/PW

/IPE

VC

/PW

/IP

EV

C/P

W/IP

EV

C/P

W/IP

EV

C/P

W/IP

ODUk

EC

/PW

/IPE

VC

/PW

/IP

EV

C/P

W/IP

EV

C/P

W/IP

EV

C/P

W/IP

10/40/100 Gb/s

tra

ffic

tra

ffic

TransportTechnologyEvolution


ConclusionsConclusions

Standardisation happens at the forefront of technology: just before market introduction

ITU can help leverage the knowledge of academic environment

Good reserach alone is insufficient: dissemination of results via standards increases payback

ITU-T SG 15 welcomes new ideas and new people and organisations to remain in leading position

SG 15 is happy to organize brainstorming sessions to make experts familiar with new trends: proposals are welcome

Formalities exist, but are limited. Secreteriat is there to help

Next plenary meeting: Febr. 2011 in Geneva

Pune, India, 13 – 15 December 2010 ITU-T Kaleidoscope 2010 Beyond the Internet? - Innovations for...

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