FTTH System Standards

FTTH Conference 2011

Frank Effenberger

Trends and challenges in Access systems

Active electronics and optics are a distinct and importantcost element in true broadband access systems

Important factors

Mass production is essential to obtain economies of scale

Consistent standardization allows interoperability

Technical improvement of the business caseTechnical improvement of the business case

Ensuring Full service support is critical to get every euro ofvalue from the entire access markets

Reducing capex by developing a single common market at alllevels of the equipment supply chain

Reducing opex by streamlining installation and troubleshooting

To pave the way to develop FTTH, and re-develop FTTH inthe future, Telcos are looking for technologies allowing:

Cost effective day-one deployment

Easy evolution to higher and higher bandwidth2

Working Party 1 of SG15Transport Aspects of Access and Home Networking

Q1/15: Coordination of Access Network Transport Standards

Upper-layer aspects of home networks and their association with access

IP for home networks

Detection of home network topology

G.9970 – G.9971

ITU-T SG15 is working on the standardization of all the available systems to streamline FTTH . Possible solutions include Passive optical networks, point to point systems as well as metallic-based in-building and home network interconnect.

G.9970 – G.9971

Q2/15: Optical Systems for Fiber Access Networks

Passive optical networks: GPON/ XG-PON, EPON, BPON, WDM PON

Point to point optical access

G.981-987

Q4/15: Transceivers for twisted-pair access and home networking

HDSL, SHDSL, ADSL, VDSL2, Vectoring for DSL (G.991- G.999)

Management of DSL transceivers, line testing, line bonding

G.hn, G.hnem in-home networking via phone, coax, and power wires

(G.9954, G.9955, G.9960, G.9961)

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“Coordination of Access Network Transport standards ”

The responsibility under this Question includes the following areas ...

* Maintain and update the ANT Standards Overview & Work Plantogether with other study groups and in conjunction with ITU-R andother relevant organizations

* Maintain coordination across the relevant ITU-T study groups toensure all available expertise is utilized to best advantage and in theestablishment of priorities

•Contribute to ITU efforts to support developing countries by makingavailable pertinent information on access network standards.

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available pertinent information on access network standards.

•Extension of the ANT Work Plan to activities related to HomeNetworking and energy savings in the Access Network.

and the following major Recommendations:

Access Network Transport Standards Work PlanAccess Network Transport Standards OverviewG.9970: Generic home network transport architectureG.9971: Requirements of transport functions in IP homenetworks

Generic home network models

Application Layer

Transport Layer

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Management Layer

“Optical systems for fibre access networks”

The responsibility under this Question includes the followingareas for optical access networks

•System requirements

•Physical medium dependent specifications

•Transmission convergence specification

•ONU management specifications

and the following major Recommendations on OAN’s:

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and the following major Recommendations on OAN’s:

G.982 TDM PON systemG.983 Broadband PON seriesG.984 Gigabit PON seriesG.985 100 Mb/s P2P systemG.986 1Gb/s P2P systemG.987 Ten Gigabit PON seriesG.988 Generic ONU Mngt. and control Interface (OMCI)

What’s going on: G-PON

The question has spent last 8 years defining, refining, andextending the G-PON system

Define:G.984.1 Gigabit PON system requirementsG.984.2 Gigabit PON PMD specificationsG.984.3 Gigabit PON TC specificationsG.984.4 OMCI

Refine:G.984.1 Rev Greatly expand descriptions of service layers

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G.984.1 Rev Greatly expand descriptions of service layersG.984.2 Amd Capture industry best practices for PMDsG.984.3 Rev Simplify TC layer to reflect real usageG.984.4 Revs Constant improvement of the OMCI

Extend:G.984.5 Gigabit PON PMD compatibility and coexistenceG.984.6 Gigabit PON Reach extension

Related standard: IEEE P802.3ah GE-PONA functionally similar system, used mainly in the Far East

G-PON system concept and key parameters

ONU1

ONU2OLT

12 3

12 3

2 1 2 1

2 31

Time

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ONU3

Splitter

12 32 31Time

Speed 2.4 / 1.2G ‘LAN-like’ DBABudget B+ (28dB) / C+ (32dB) Distance 20km (options to 60km) Split 64 Options for protection, security, power saving

Gb/s PON Standard Organizations

ITU-T Q2/15G-PON standards

FSANLeading GPON

ArchitectureInteroperability

IEEE P802.3ahEPON standards

Broadband-ForumGPON System req.

TR-156, 167GPON Interop

TR-254

ATISFilling the gaps

NTTSystem spec

KTSystem spec

China CCSASystem spec

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What’s going on: P2P

The question has supported several projects to define practicalsingle fiber point to point transceiver solutions

Define:G.985 100Mb/s single fiber optical access

Related standard: IEEE P802.3ah 100[0]Base-BXThese are the same, but for some parametric differences

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These are the same, but for some parametric differences

Coordinate:Numerous communications with the IEEE to discuss theextension of 1000Base-BX via G.986

Scale:G.986 1Gb/s single fiber optical access

Silent start – P2P ONUs won’t jam PONsOMCI reuse for P2P

P2P Architecture and Dense OLT

Port 48

Module 1000Base-BX

Lambda1490nm down

OLT

Lambda1310nm up

Speed GE、FE

Budget 15dB

Module

interface

Rx/Tx

Rx/Tx

ONUs11

What’s going on: XG-PON

The question has spent last 3 years defining the new XG-PONsystem

Define:

G.987 Gigabit PON definitions and acronyms

G.987.1 Gigabit PON system requirements

G.987.2 Gigabit PON PMD specifications

G.987.3 Gigabit PON TC specifications

Refine:

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Refine:

G.988 Generic OMCI

Now covering G-PON, XG-PON, P2P GbE, and 10GE-PON

Extend:

G.987.4 Ten Gigabit PON Reach extension (in progress)

Related standard: IEEE P802.3av 10GE-PONA similar system, sharing many sub-systems with XG-PONTC-layer uses a different basis

Field Trial Site: Taunton, MA

Worlds first XG-PON Trial System

XG-PON OLT-48VDC

Network

Interface Card

XGPON PON card

(single PON port)

Power Interface Card (x2)

Control Card

XG-PON ONT

XG-PON PON Interface

GigE Interface (x4)10GigE Interface (x1)

Loop length: 1.73km

CO

Trial Home

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10Gb/s (NG-PON1) Standard Organizations

ITU-T Q2/15XG-PON standards

FSANLeading XGPON

Open considerationArchitecture

Specifications

ITU-T Q2/15

IEEE P802.3av10GEPON standards

Broadband-ForumXGPON System req. (slight mods to TR’s)

ATISFilling the gaps

NTTSystem spec

MSOSystem spec

ITU-T Q2/15Liaisons

Workshop

IEEE P1904.1System Integration

for EPON

BB-ForumTR-200

China CCSASystem spec

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What’s next: ?

In the coming years, Q2 will begin the consideration of thenext system after XG-PON class solutions

These systems could include:

WDM-PONInjection (wavelength control at the PHY)

Tunable (wavelength control at the TC)

FDM-PON

CDMA-PON

Tunablility

Power efficiency

DSP

NG-PON2

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CDMA-PON

Coherent-PON

Stacked XG-PONsBased on tunable ONUs transceivers

Based on intelligent tunable OLTs

Even more possibilities!

Generally speaking, system capacity to be increased

40Gb/s total rate, 1Gb/s per user

40km natural reach without extenders

Wider split ratios (up to 1000 ONUs)

efficiency

Polarization

NG-PON2Port density

Stability

NG-PON2 Standard Organizations

ITU-T Q2/15WDM-PON systems

NGPON2 (when ready)

FSANStudying NGPON2Open consideration

Architectures Applications

IEEE 802.3?Who knows?

ITU-T Q6/15Wavelength seededMetro Applications

IEEE 1905.1Who knows?

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“Transceivers for customer access and in-premises networking systems on metallic conductors”

The responsibility under this Question includes the followingareas for

Transceivers for twisted-pair access

Test and management of DSL

Home networking

and the following major Recommendations relevant to FTTH:

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G.993.2 VDSL2 Very High speed DSLG.993.5 VDSL2 Self FEXT cancellation (Vectoring)G.996 Test procedures for DSLG.997 PHY Management for DSLG.998 Pair bonding

G.9960 Unified high speed HN: Architecture and PHYG.9961 Unified high speed HN: Data link layer

Vectoring enables up to 100 Mb/sFar-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

FEXT

•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 G.993.5 for vectoring

•VDSL2 bit-rate performance is nearly doubled

•VDSL2 plays an important role in FTTBuilding deployments

•Leverages the existing Cat3 inside wiring 18

Unified Home Networking Standards

G.hn supports home networking up to 1 Gb/s

One standard for all common media types

In-home coax, twisted pair, and power wires

Support of IPTV with Multicast and full QoS (quality of service)(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

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Conclusions

There is a wide range of FTTH related system standards

Splitter-based PONs

Fiber-based P2P

Copper-based in-home/building links

These are being extended and scaled to follow the rising bandwidth trend

Business value is always the key object

Reduction of capex and opex over the lifetime

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