Core G-PON requirements

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  • Lisbon, 25 February 2010

    Review of G-PON standards and their application

    Yupeng (Roc) Xiong

    Huawei Technologies

    ITU-T Q2/15 contributor

    FTTH Conference 2010

    ITU-T Standardization: from G-PON to 10G XG-PON

  • Lisbon, 25 February 2010 2

    Outline

    Background

    Core G-PON system standards

    Ongoing improvements

    Major applications

  • Lisbon, 25 February 2010 3

    Background: Older PON systems

    ITU-T Q2/15 has a well established program of PON system development

    1996: G.982 an early STM-PON

    1998: G.983 the ATM-PON system

    2001: G.983.3,4,5 the B-PON system

    B-PON was strongly influenced by the B-ISDN (ATM) network architecture

    Not so relevant looking forward

    Optics and microelectronics market changing

    Explosion of Internet required more bandwidth

  • Lisbon, 25 February 2010 4

    Background: Motivations for G-PON

    In 2001, Q2/15 began G-PON project

    Key requirements

    At least 1 Gb/s capacity

    Full service (including legacy) support

    Oriented towards IP services

    Cost effective and FCAPS managable

    Key non-requirements

    Compatibility with B-PON not required

  • Lisbon, 25 February 2010 5

    Core G-PON requirements (G.984.1)

    System parameters

    Rates >1Gb/sA range supported, to

    permit economical options

    Efficient use of BWAvoid linecodes

    DBA supported

    EnvironmentalOLT indoors

    ONU indoor or outdoor

    Protection possible50ms recovery

    Service parameters

    VoicePOTS, leased lines,

    special services

    Data10, 100, 1000Base-T

    Ethernet

    Other interfaces possible

    VideoIP-video over data path

    RF-video overlay

  • Lisbon, 25 February 2010 6

    Core G-PON PMD layer (G.984.2)

    The PMD spec provided many options for implementers to find the optimum

    Downstream rates: 1.2G and 2.5G

    Upstream rates: 155M, 622M, 1.2G, and 2.5G

    Loss Budgets: 20, 25, and 30 dB

    Distance20km physical reach

    Support for power levelingMakes burst mode reception easier

    FEC optionLoss budget / ONU optics cost down

  • Lisbon, 25 February 2010 7

    Core G-PON TC layer (G.984.3)

    A lightweight system that adapts both ATM and Ethernet to the PONs TDMA natureDownstream frame

    Bandwidth Map (PCB) to manage the upstream ATM partition to support legacy servicesGEM partition to support packet services

    Upstream burst transmissionPL-OAM, DBA, and protection included from the begining

    Payload n

    P-Frame Interval

    PMF-TC Downstream

    P-Frame Interval

    TP-Frame

    = 125 uS

    PCBd

    n+1

    PCBd

    n+2Payload n+1

    PCBd

    n

    TDM & Data Fragments

    over GFP Section

    N * 53 bytes

    "Pure" ATM cells

    Section

  • Lisbon, 25 February 2010 8

    Core G-PON management (G.984.4)

    Just making a data link is not enough for an access system

    Operators need a full operations support system to provision, monitor, and troubleshoot the access network

    The ONU Management and Control Interface (OMCI) provides this

    OMCI was built on B-PON experience

    Inherited much of the interoperability progress that was made with B-PON systems

  • Lisbon, 25 February 2010 9

    Improve: G-PON Lite

    The first round of G-PON recommendations were ratified in 2004

    These served as a basis for early implementers and deployment

    As the market matured, many of the options included in the first round were found to be extraneousQ2/15 has revised and narrowed the recommendations to reflect the marketPHY layer:

    Rate: 2.5G down, 1.2G upLoss budget: 28 dB

    TC layer: ATM partition droppedPower leveling deprecated

  • Lisbon, 25 February 2010 10

    Improve: Ready for XG-PON (G.984.5)

    Operators expect that G-PON will be widely deployed by the time XG-PON will come

    It is important that the evolution to XG-PON will be as easy as possible

    G.984.5 prepares G-PON for this bySpecifying the blocking filter for G-PON ONU Rxs

    Specifying reduced upstream bands for ONU Txs

    G-PON

    X/S

    1441 1450 1480 1500 1530 1539

    7 dB

    22 dB

    Wavelength

    (nm)

    Narrow

    G-PON

    1260 1290 1300 1320 1330 1360

    Wavelength

    (nm)

    Reduced G-PON

    Original G-PON Spectrum

  • Lisbon, 25 February 2010 11

    Improve: Reach extenders (G.984.6)

    The basic PON link is good for 20kmThis reaches 90% of customers in the US market (a relatively sparse population density)

    Extending the reach can be one part of a strategy to reach the last 10%G.984.6 creates the specifications for mid-span reach extenders

    Total distance: 60kmTotal loss budget: 56 dB

    ONU

    ONU

    ODN OLT

    UNI

    UNI

    SNI

    R/S

    R/S

    S/R

    Mid-Span

    ExtenderOTL

    S'/R' R'/S'

  • Lisbon, 25 February 2010 12

    Improve: OMCI and Interoperability

    The OMCI is what turns raw bandwidth into billable services

    G.984.4 has been constantly improved to add new services and interfaces to the PON system

    VDSL to enable FTTnode and FTTB

    MoCA in-home networking

    IGMP management IPTV support

    Optical line supervision to reduce Ops costs

    Interoperability has been a focus of Q2/15, in conjunction with the FSAN Interop group and the Broadband Forum

    Nine test events so far

    Nearly perfect plug-and-play results achieved

  • Lisbon, 25 February 2010 13

    Standards in Action: Implementation

    Leading System vendors Major chip vendors

  • Lisbon, 25 February 2010 14

    Major Application: Verizon FiOS

    FiOS Available in 16 States & Washington DC

    12M HHs Passed YE2008; 18M HHs Passed 2010

    BPON Deployment Starting in 2004

    GPON Introduced in 4Q 2007

    Office ParksSmall Businesses

    Residential

    |X|

    Circuit

    SwitchCopper

    Feeder

    Copper

    Distribution

    SAI

    FDH

    FTTP Overlay

    OLT

    New

    Develop

    ment

    FDHFTTP Full Build

    ONT

    ONT

    ONT

    ONT

    ONT

    ONT

    Small Businesses

    ONT

    ONTONT

    ONT ONT

    5.7

    FiOS Internet Customers (M)

    0.0

    0.6

    1.2

    1.8

    2.4

    4Q06 1Q07 2Q07 3Q07 4Q07 1Q08 2Q08 3Q08

    FiOS TV Customers (M)

    0.0

    0.4

    0.8

    1.2

    1.6

    4Q06 1Q07 2Q07 3Q07 4Q07 1Q08 2Q08 3Q08

  • Lisbon, 25 February 2010 15

    Major Application: Europe

    Fast emerging GPON market

    http://www.francetelecom.com/fr/http://www.orange.com/default.asp?UID=&UAT=http://www.sonaecom.pt/default.aspxhttp://upload.wikimedia.org/wikipedia/de/7/70/T-Home_Logo.svg

  • Lisbon, 25 February 2010 16

    Worldwide Deployment of G-PON GPON commercial region

    GPON pre-commercial region

    Non start

  • Lisbon, 25 February 2010 17

    So Far (~2008)

    Large AN Sites

    Multi-Layer Structure

    Medium-Term (2008~2010)

    OLT Centralized

    Single-Layer 10GE Aggregation

    Multi Service GW Convergence

    Long-Term (2010~2016)

    PON Extender for Remote Area

    3-Layer Network Architecture

    Fixed-Mobile POP Convergence

    Backbone

    Service POP

    Metro

    Access

    Splitting

    COSplitter

    1~3Km

    5~10Km

    MSE BRAS SR VPN PE

    Large Capacity AGG SW

    PONExtender

    Remote area

    BRAS SR

    CR CR

    10GE

    GE/10GEMulti-Layer Agg.

    n*GE

    1-3Km1-3Km

    1-3Km 1-3Km1-3Km

    1-3Km 1-3Km

    AN AN

    ANAN

    AN AN

    CR CR

    k*10GE

    n*10GE

    m*GE/10GE

    OLT

    Splitter

    CR CR

    k*10GE

    S-GW MSE AGW

    n*10GE

    OLTCO

    5~10Km

    1~3Km

    50~100Km

    Splitter Splitter

    1~3Km 1~3Km

    G-PON enables network simplification

  • Lisbon, 25 February 2010

    Thank You!

    For more information, contact

    Frank EffenbergerRapporteur Q2/15

    Vice-chair, ATIS COAST-OANIEEE Comsoc TAOS std. liaisonfeffenbergerhuawei.com