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NGPON2 Introduction
Q2 2013
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Agenda
PON StandardsNGPON standard Progress in FSAN and ITU
• Requirements• Coexistence
NGPON2 technology introduction• TWDM-PON• WDM-PON• OFDM PON• XLG PON• Others
Summary
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PON Standards
BBF
TR200 EPONTR156 TR167 TR142 PON
ONTManagement
WT277 WT278WT287
ITU-T/FSAN CCSA
E/GPON 承载多业务 EPON互通 10GE/GPON PON 节能 10G E/GPON光模块10G-GPON
G.984 1G GPON NG PON - G.987 NG
PON1 - NG PON2
IEEE
802.3ah 1G-EPON
802.3av 10G-EPON
SIEPON
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Other PON Standards
CTC
EPON Spec 3.0 GPON spec 2.0
CUC CMC/电网 EPON SpecGPON Spec
EPON Spec
ATIS
OAN PON
SCTE/BRC
RFOG PON• Cablab DOCSIS• DPoE
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NGPON2 Standard Progress
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FSAN Introduction
The Full Service Access Network (FSAN) Group is an interest group for services providers and vendors to specify applicable standards. FSAN was started in 1995 FSAN has over 80 member companies representing the implementers, manufacturers, and test houses for PON Systems. FSAN’s significant works
GPON IOP XGPON1 requirements and standards XGPON1 IOP NGPON2 requirements
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Relationship between FSAN and ITU
FSANDiscuss and specify
requirementsTechnology selection
ITUDiscuss technical details
Draft and release Standards
White PaperContribution
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NGPON2 Motivation
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Drive for NGPON2
Service drivers Growing bandwidth demandVideo evolution, video conference, Digital Home, Social networking, Cloud
Services, Gaming, P2P traffic End user requirements Backhauling
Network drivers PON upgrade path Simplification of operational processes Node consolidationPower reduction
Openness
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PON Technology Migration
Year
0.15G
0.6G
1G
2G
10G
40G
1998 2004
A/BPON
GEPON
GPON
10GEPON
XGPON1
2010 ????
Future Coherent/
OFDM
TWDM-PON+ PtP WDM
DownstreamUpstream
Migration according to requirement,ODN coexistence , openBig split ratio, High bandwidth, Long reach, Power saving
100G
TDM-Based PON NG-PON2
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NGPON2 Choices
Year2006 ~2010 ~2015
NGPON2>=40GDS Aggregated capability per feeder
ONU Substainable
XGPON1(US 2.5G;DS 10G)
GPON
FDM PONOFDM PONWDM PON
WDM-TDM PONWDM PON(colorless)-PS-ODNWDM PON(colored)-PS-ODN
WS-TDM PON
WDM PON(colorless)-WS-ODNWDM PON(colored)-WS-ODN
Coexistence
OLT&ONU Replacement
Modified ODN
CoexistenceEnables gradual migration from pre-existing PON systems over the same ODMOLT&ONU replacementEnables migration over a legacy ODN by a “complete” replacement of preexisting PON terminalsModified ODNSomething other than only power splitter ODM
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TWDM-PON
TWDM-PON has been confirmed to be the main technology of NGPON2.
Time and wavelength division multiplexed PON 4 XGPON1 carried on 4 wavelength. 40G PON: 40G downstream; 10G upstream
Coexistence Current GPON and XGPON1 can have no change Can coexist with GPON and XGPON1
Key technology Tunnable receiver Tunnable filter
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TWDM-PON Architecture
TWDM-PON reuses XG-PON technologies
Downstream multiplexing Upstream access techniques Timeslot granularity
Multicast capabilityBandwidth allocation mechanism.
OLT multiplexes and demultiplexes multiple wavelengths.
TWDM-PON
ODN
OLT
splitter
UNI
SNI
Access Network (AN) [ITU-T G.902]
MAC
ONU
MAC
ONU
MAC
ONU
MAC
ONU
MAC
WDM
M
UXW
DM
MU
X
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TWDM-PON Wavelength Plan1
1260 1270 1280 1290 1300 1310 1320 1330 1340 1350 1360
1480 1490 1500 1510 1520 1530 1540 1550 1560 1570 1580 1590 1600 1610
1575 1576 1577 1578 1579 1580 15811276 1277 1278 1279 1280
TWDM-PONdownstream
G-PON upstreamTWDM-PON upstream
G-PON downstream Video
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TWDM-PON Wavelength Plan2
1280 1290 1300 1310 1320 1330 1340 1470 1480 1490 1500 1510
1547.87 15701557.361555.751554.13 1558.98
TWDM-PON downstream
G-PON downstreamG-PON upstream
127012601250
XG-PON upstream
1520 1544.381538.191536.611535.04 1539.77
TWDM-PON upstream
1580
XG-PON downstream
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TWDM-PON Wavelength Plan3(Selected)
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TWDM-PON Coexistence and Migaration
ONU XG-PONOLT
XG-PON
OLT TWDM-PON
ONU TWDM-PON
CO
OLT G-PON
ONU G-PON
Initially installed
removed
Newly installed
WDM
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NGPON Standard G.989
20
G.989.2 - PMDG.989.1 - service
Architecture:• Backward compatible with G-PON,
XGPON1, with higher data rateNew concerns / Features• Security model and Proposal• Time Sync
ITU-TQ2/SG15
G.988 – G.OMCIG.989.3 - XGTC
PMD specifications (based on G.987.2, with changes)
Including PHY parameters and requirements
Extensions to G-PON TC layer Adaptation to new PHY requirementsMay be subject to changes after its first
version is published if necessary
Extensions to G-PON, XG-PON OMCI layerWill require extensive work to make sure that
nothing is broken and that references are properly handled in all documents
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WDM-PON
Each ONU is served by one or more dedicated wavelengths.
A number of OLT Tx/Rx components map PON client signals onto separate wavelengths, which are multiplexed onto a shared, bidirectional fiber
Two kinds of WDM PONPoint to point WDM PONhybrid WDM PON : a wavelength (especially upstream) may be shared by two or more ONUs
A wavelength control block (λ control) may be present to control the transmitted and received wavelengths and the respectively connected ONUs.
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WDM-PON Architecture
AdvantageHigh bandwidthNo DBA algorithm requirement
DisadvantageExpensive and very high power consumptionWavelength allocation
Key Technology Colorless ONU
IL FPRSOATunnable transmitter
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OFDM PON
Orthogonal Frequency Division Multiplexed (OFDM)-PONReliant on electronic digital signal processing (DSP)
Compensate physical-layer impairments
bandwidth flexibility.S/P
M-ary QAM
L-pt. IFFT
AddCP
S/P
Binary data … … … … I
QDAC
ADCS/P …
S/P…
RemoveCP…
L-pt. FFT… FDE…
M-ary QAM
Binary data
I
Q
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XLG-PON
Forty gigabit time division multiplexed PON (XLG-PON)Increase the downstream speed of a TDM PON from 10 Gb/s (XG-PON, ITU-T G.987) to 40 Gb/s (XLG-PON)
Key Issues Optical budget APD bandwidth Chromatic dispersion (CD) Electronic complexity at higher speed:
RX-APD TX-DFB
ONU XLG-PONOLT XLG-PON10 Gb/s, O-band
TX-EMLLogic
40 Gb/s, O-bandRX-APD
LogicWDM-XL
WDM-XL
SOA
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Coexistence of XLG-PON
ONU GPON
ONU XGPON
ONU 40GPON
OLT GPON
OLT XG-PON
OLT XLG-PON
OLT video
WDM2-XG
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Other PON Technology
UDWDM-PON
SS WDM-PON
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Market Trend of Cortina
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Market Trend of Cortina
T4 MKT status• We have win most of tier 1 vendors and will win more tier 2 vendors• We will focus on 10G ONU design win the next half of this year
T5 Development–- we continue to build XGPON IP –- continue to define and refine T5 as a product –- engaging key customers for T5 (H Z Juniper ALU Mitsubishi)–- we will wait until the right timing to launch product
10GEPON OLT
ZTEHuaweiFHASB
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Summary
FSAN has decided the TDWDM-PON is chosen to be the main NGPON2 technology.
P2P WDM-PON will be used in little scenario.
G.989 is started to be drafted in ITU
The real application of NGPON2 will be after 2015
10GEPON and XGPON1 will be used as migration to the next generation PON, but they will last for long time.