GAO-05-225G Core Financial System Requirements: Checklist ...
Core G-PON requirements
Transcript of Core G-PON requirements
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
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Outline
Background
Core G-PON system standards
Ongoing improvements
Major applications
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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
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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
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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
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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
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Core G-PON TC layer (G.984.3)
A lightweight system that adapts both ATM and Ethernet to the PON’s 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
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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
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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
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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 Rx’s
Specifying reduced upstream bands for ONU Tx’s
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
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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'
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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
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Standards in Action: Implementation
Leading System vendors Major chip vendors
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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
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Major Application: Europe
Fast emerging GPON market
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Worldwide Deployment of G-PON GPON commercial region
GPON pre-commercial region
Non start
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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. liaisonfeffenberger<at>huawei.com