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FTTH technologies in the NTT Network~ over 20 years experience ~
November 18, 2009
NTT AS-Labs.
Makoto Tsubokawa
DigiWorld Summit 09, Montpellier
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Outline
1. Overview of broadband service and FTTH networks
2. NTTs progress on FTTH technologies
3. Enhance services to accelerate FTTH
4. Next generation access systems
5. Summary
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BB topics in Japan
Telephony
Cellular 113 mil. > POTS+ISDN 46 mil. > IP tel. 21 mil.
Broadband users* (ADSL+FTTH**+Cable+FWA) 31 mil. Penetration 60%. Coverage*** 99%
FTTX users 16 mil. 50% of BB users. Coverage 90% (National target 90% by 2010)NTTs FTTX 12 mil. (NTTs target 20mil. by 2010)
NTTs NGN (All-IP network platform with QoS, security and reliability)Launched in Mar. 2008. (NTTs target: coverage 100% by 2010)
Reference: Announcement from Japanese Ministryof Internal Affairs & Communications
As of June 2009 * :Access speed >30 Mb/s, **: Include FTTB+VDSL***: Households covered
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SBB 13.7%
KDDI 3.7%
e-Access 8.1%
Total
DSL
FTTH
CableTV
30.9 mil
15.9 mil
10.8 mil
4.2 mil
09.0605.03 08.03 09.0605.03 08.03
Broadband subscribers BB market share (total)
As of June 2009, total broadband subscribers is ~31 mil. (FTTH ~51%).
NTT east and west have 50 % market share.
Reference: MICs news release
Broadband market in Japan
Softbank-BB has~40% of DSLmarket share
YearYear
Number %
NTT West22.6%
NTT East28%
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FTTX subscribers FTTX market share (total)15.9 mil
Total
Single house+business
MDU(Apartment house)
6.6 mil.
9.3 mil.
Power co.
11.8%
KDDI 7.4%
09.0604.03 08.03
FTTX market in Japan
As of June 2009, total FTTX subscribers is ~16 mil. (MDUs ~42%).
NTT east and west have 74 % market share.
09.0604.03 08.03
NTT West32.2%
NTT East42%
Reference: MICs news releaseYear
Year
Number %
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Unbundle charge
Customer
premises
NCCRouter
Local office Transit Office
\4610/fiber/month
NCCRouter
FTM CTFCTF
POI: Point of Interface
FTM: Fiber Termination ModuleCTF: Cable Termination FrameRate: 1 = \135
(~ 34 /fiber)
\1368/fiber-m-month
(~ 10 /fiber-m-month)
Subscriber loop
Optical fiber Optical fiber
Trunk cable
In the case of NTT-East
Reference: NTT-Easts news release
POI
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Access charge
Customerpremises
\408
(~ 31)
8way-opticalsplitter
In the case of NTT-EastAccess speed 1Gb/s (max)Rate: 1 =135 yen
Reference: NTT-Easts news release
ONU
4way-opticalsplitterOptical
fiber
NCCNW
\4240 \790 \4016/OSU
(~ 6) (~ 30)(~ 3 euro)
\9454
(~ 70)
Total
OSU
OLT
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Network configuration
NTT provides triple play services on one fiber.
- IP-based services; Internet access, IP-TV, Telephone (high quality VoIP)- Multi-channel RF-video distribution (RF-TV)
RouterVoIP-TA
ONU
STB
UNI
GE-PON
IP videoproviders
ISPs
High
SpeedInternet
IP-TV
Phone
(VoIP)
Internet
Powersplitter
Servicemultiplexed UNI
OLT
V-OLTRF-TV(=SatelliteBroadcasting)
Distributionnetwork
WDM system is needed only forRF-video distribution. SCM-PON
WDM WDM
SatelliteBroadcasting
company
RF
Legacy
IP-NW
NGN
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Services provided by NGN
1. Optical broadband services
- FLETS Hikari Next (100, 200 Mb/s) Data + Video
2. Optical telephony services- Hikari-Denwa / Hikari-Denwa Office Type
3. Security services
- FLET'S Virus Clear v64. Services for corporate customers
-Business Ether Wide
(1M~1 Gb/s with backup line and QoS mgt.)-FLET'S VPN Gate
5. Services for content providers- FLET'S Cast (Content delivery service for IPv6 users)
- Services for digital terrestrial television IP retransmissioncompanies
IP-TV, IP-videoincl. retransmission of TV
NGN platform services
Cloud, SaaS, VPN
Driving force?
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RegionalIP-NWHikari
Denwa(VoIP)
NW
PSTNRegionalIP-NW
HikariDenwa(VoIP)
NW
NGN-NW
PSTN
Now ~2012
?
Plan for NGN convergence
NGN-NW
VoIP Data
NTT announced NGN convergence by 2012.
Migration to NGN is a hot topic.
POTS VoIP DataPOTS
v6v4&6
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2. NTTs progress on FTTHtechnologies
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FTTH system development in NTT
STD
Speed (Down/UP)
Duplex
Launched
STM-PON B-PON
ITU-T G.983 series IEEE 802.3ah
GE-PON
622Mbps156Mbps 1.25GbpsWDMTCM
NTT proprietary
16Mbps
Frame ATMSTM Ethernet
1997 1997(L.L.)/2002 2004
SCM-PON, STM-PON
STM-PON (p system: for telephony)
STM-PON (for Internet access)
B-PON GE-PON
B-PON: Broadband Passive Optical NetworkGE-PON: Gigabit Ethernet Passive Optical NetworkSCM-PON: Subcarrier Multiplexing Passive Optical Network
TCM: Time Compression MultiplexingWDM: Wavelength Division
Multiplexing
Multimediatrial
1986 1994 1996 1998 2000 2002 2004 2006
Start
Research began in 1986. Various kinds of systems were
developed, and Gigabit Ether PON was deployed after 2004.
ATM orEthernet?
SS or PDS?
(P2P or PON)
DSL or Fiber?CAPEX reduction
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ADSL
Take offStart
Now
200820042000 2012
Typical issues with FTTH deployment
?
Penetration
Year
Start-upReduce CapEx to offerlower tariff
Standardize G-(E)PON
2) Takeoff and surgeDeploy cost effectivenetworks (Reduce OPEX)
Increase usage rate andprolong network facilities
G-EPONSTM-PON B-PON 10G-EPON?
2008.3NGN starts
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NTTs gigabit EPON system
IEEE802.3ah compliant Expanded 1000BASE-PX20 optical Interface 10/100/1000BASE-T on ONU DBA for various QoS (DBA: Dynamic Bandwidth Assignment)
Carrier-grade operation support system Authentication Downstream / Upstream AES 128bit encryption Interoperability between different vendors
ONU
OLT
2-stage splitter(Max. 32 branches)
1.49mm
1.31mm
NTT developed a carrier-grade Gigabit EPON system
and deployed it widely from 2004.
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Wiring of distribution and drop cables
-Overcrowding-difficult management
(1) Area scale: large
(2) Area scale: small
Distribution area
-not economical
(area covered by optical splitters)
(1) Drop fiber only
(2) Thin distribution cable + drop fiber
8
Distribution area configuration
Combination of two kinds of cablesincreases the splitter utilization rate.
PON architecture enable us to construct FTTH economically. A key issue ishow enhance the optical splitter utilization rate. We have optimized the rateby using a distribution rule dependent on area segmentation.
Drop fiberDrop fiber
Splitter
8 8
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1000-fibercables
Inner pipe(f29mm)
More cable in a conduit
Radius and weight arereduced by 20% and 25%
Thin 1000-core cable
Conventional cable New cable
f23mm2
9mm
Fitting parts
for 3 cables
Conduit
A conduit can accommodate3 thin 1000-fiber cables.
No civil work !
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An automatic optical fiber operations support system (AURORA) can
reduce operating costs by undertaking the remote and automatictesting of the optical access network from a maintenance center.
Maintenance center
Control terminal
Water sensor
IDM
ONUOptical fiber
cable
Fiber selectorOTM
OLTOLT
Router
Optical couplerunit
IDM-FS
Optical jumperunit
Customer premises
ONU
DCN
DB
Central office
Termination cable(with filter)
Test light
Testing orderand result
Automatic optical fiber line testing system
Easy maintenance !
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Optical cord
Reader
Terminal
LED for navigation
Connectorplug
To DBServer
Special tool with ID tag detectionfunction
Connectoradaptor
Distribution frame
ID tag1 ID tag 2
LED control panel
MU connector with ID tag
Special tool
Connector adaptorwith ID tag
By using LED navigation and ID tag of this system, operators can
connect a plug without mistake, and update DB after automaticconfirmation instantly.
IDM ( Integrated distribution module)
Size: 1800x600x1600 [mm] (HxDxW )Capacity: 4000 fibers
Optical wiring identification and management system
Fewer Errors !
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ADSL
Take offStart
Now
200820042000 2012
Current issues with FTTH deployment
?
Penetration
Year
3) Slow down ?Explore new customers
Move-up ADSL users, rural users
Provide attractive services
Multi-channel video, Game, etc.Smooth transition to NGN
Accommodate legacy servicesby NGN
G-EPONSTM-PON B-PON 10G-EPON?
2008.3NGN starts
Start-upReduce CapEx to offerlower tariff
Standardize G-(E)PON
2) Takeoff and surgeDeploy cost effectivenetworks (Reduce OPEX)
Increase usage rate andprolong network facilities
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Fiber installed in MDUs and MTUs
In Japan, MDUs account for 40% of the total, where FTTB+VDSL has
generally been used. Thin ducts and small spaces congested withcopper prevent installation of optical fibers.
ONUVDSLL2SWcopper
FTTB+VDSL/L2SW
MDF ONU
Optical splitter
Upgrade
MDF
~30 Mb/s100 Mb/s1Gb/s
FTTH
Note: Existing small MDUs with fewer than 50 units account for 90% of the total.
Tight space!
Trouble-prone!
How install?Con
gestion!
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Small diameter & low friction indoor cable
3.1mm
2.0mm
Conventional indoor cable
1.41.6mm
1.92.0mmF
F
F
F
F
Existing MDU
1 to 1indoor wiring
New indoor cable
More than20 cables
Pipe withexisting copper
Fewer than
6 cables
MeritsMost MDUs can be installedInstallation 40% fasterCO2 reduction (~80%) compared with VDSL
Downsized 50% andcoated with low frictionmaterial
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Installation of the new indoor cable
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3. Enhance servicesto accelerate FTTH
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FM signal
- Digital terrestrial broadcastretransmission ~10ch(only on NGN service menus)
- VoD incl. HD class.- Karaoke etc.
RF-TV (by WDM)IP-TV
Two ways for FTTH video service
SKY PerfecTV! ~300ch- Digital and analogueterrestrial broadcast re-
transmission- Video incl. HD class.- Karaoke etc.
Services: Services:
ONU
STB
OLT
IP videoprovidersIP multicast
IP-NW IP-NWG+V
ONU OLT
V-OLT
Videodistribution
network
Freq. [GHz]
1 2 3 4 5 6
WDM
~10 ch
~300 ch
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Feature comparison
Currently, the RF-TV system seems to have a slight lead, but IP-TV
will likely become dominant on a long term basis because of itsvarious possibilities.
RF-TV IP-TV
Capacity
(large number of broadcast channels) Sufficient
Small
(for 1G-PON)
Possibility of broadcast re-transmission No problemNeeds
consent
Compatibility with existing TV sets Compatible Need STB
Interactive service, such as VoD Impossible Possible
Copyright issue No problemLargelysolved
Network simplicity Needs WDM Simple
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Barriers for IP-TV
Basically, NTT doesnt become a broadcasting provider and also aninvestment stake of more than 3 % to such provider is prohibited: NTT Lawin Japan
An IP-TV is not regarded as a broadcasting because it is based on IPmulticast: the Copyright-ACT in Japan
IP-TV cannot provide the terrestrial TV re-broadcasting programs.(Cable TV is free of this regulation, therefore RF-TV based on the same
transmission scheme as Cable TV is also free.)
On Dec. 2006, the Copyright-Act was slightly loosened up.
Since then, IP-TV service was permitted in some service areas, but thoseareas have been a few yet. So, NTT is now promoting IP-TV depending onsuch circumstance.
As regards broadcasting service,
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Rural/Isolatedisland
Splitter
OLT
Urbanareas
OLT
Long distance
More ONUs
2008.2 ITU-T G.984.6(PON Extender Box)
Area extension using long-reach PON
FTTH deployment in rural areas can be achieved by installing burst-
mode optical amplifiers. However, serious issues such as costefficiency still remain, so cooperation with local governments isconsidered the trigger.
CO
40~100km
~256 ways
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Since 2006, WiFi services have been available on express trains. NTT
has developed wireless link technologies, and plays a role assystem aggregator* providing ISPs with the WiFi infrastructure.
2006(Commercial)
2009(Commercial)
2009(Trial)
Tsukuba EX @Japan
Super Express @Japan
Super Express @Chinese Taipei~300 km/s
~270 km/s
~130 km/s
New market: WiFi on Train
*: NTT-BP Inc. (NTT Eastssubsidiary company).
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Data centerThe
InternetOptical fiber
Ground-train link(2.4GHz WiFi)
RelayNW
SeamlessHandove
r
Station Station
Inter-car relay link (5GHz WiFi)
Mobile Router
User access link (2.4GHz WiFi)
System Structure
25GHz wireless
ISPs
Relay
Station
Station
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4. Next generationaccess systems
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Next generation requirements
Different requirements for next and subsequent steps.
Target services ~20 HD class videos,
capacity of 0.3~1Gb/s per user
Upgradeability:
Need for smooth upgrade from existing G-EPON to NGA systems on thesame ODN. Coexistence is assumed to be a key requirement.
Next step
Subsequent step
Target services Many services with wider profile (Super HD video, broadband SaaS platform,
ubiquitous communications, etc. ----). Total capacity beyond 1 Gb/s per user.
Upgradeability: Not necessary for legacy networks. New architecture desired.
Same ornew ODN?
CO
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Dataspee
d(bps)
1G
100M
10M
100G
10G
20052000 2010 2015 2020 Year1995
100BaseT
GbE
10GbE
40/100GbE
B-PON
GE-PON
G-PON
10G-EPONNG-PON1
Next
target
STM-PON
IEEE802.3 STD
2009.9
2010.5
ADSL
NG-PON2(WDM TDM Hybrid PON)
P-P
P-MP
FTTH20 mill. users10 mill.
(+ SCM-PON for video distribution)
P-P: Point to PointP-MP: Point to MultipointSCM: Subcarrier ModulationNGA: Next Generation Access
max.
min.
System deployment scenario
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Coexistence of 10G-(E)PON with 1G-EPON
10G-EPON can coexist with existing 1G-EPON, and also coexist with
asymmetric and symmetric systems simultaneously on same fiberinfrastructure.
1G/1G-MAC
1G/1G-ONU
10G/10G-MAC
10G/10G-ONU
1.49 mm
1.31 mm
1.577 mm
1.31 mm
DBA
OLT side
ONU side
1G/1G-ONU
802.3ah
802.3av
802.3av
802.3av
Migrationpaths
10G/1G-ONU
Dual-mode operation
1480
1580
l(nm)1500 15601260 1360 1550
1G UP 1G DN
10G UP
1280
video10G-EPON
G-EPON
10G DN
1574 1600
TDMA
WDM
Wavelength allocation
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Summary
Market
Moving to FTTH. NTT aims at 20 mil subscribers by 2010, but demandis slowing down
To increase demand again, videos including TV re-transmission are
expected to constitute a killer content for spreading FTTH and NGN.
Also, new markets such as move-up ADSL users or unconnected rural
users should be explored. Promotion by local governments is expected.
Since FTTH took off, NTT has developed cost effective technologies for
reducing the cost of the electronics and labor needed for deployment.
G-EPON, IP/RF video distribution system, strategic access NW planning,
Low- friction cable, Thin 1000-fiber cable, Automatic test system, etc.
As the next step, 10G-(E)PON is the most promising as a major FTTH
system. It has sufficient potential to provide currently predicted services,
and allow relatively smooth migration from the existing networks.
Technology
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Thank you.Merci.