Post on 14-Jan-2015
description
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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