Joint ITU-T/IEEE Workshop on
Next Generation Optical
Access Systems
NTT’s FTTH Deployment status and
perspective toward next generation
Yukihiro Fujimoto
Access Service Systems Labs.
NTT
Geneva, 19-20 June 2008
1
International
Telecommunication
Union
Outline
History of Commercial FTTH
Current FTTH
FTTH Enhancements for Next Step
Geneva, 19-20 June 2008
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Telecommunication
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Significant Changes in Access last decade
Broadband access competition
DSL and FTTH marketing pitches have focused on the
transmission speed.
Services
Internet access and High-quality VoIP services became
the “Basic FTTH Service”.
Networks
Adopting IP packet-base and Ethernet technologies.
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The First Commercial FTTH in NTT
First commercial FTTH deployed in 1997.
The services for FTTH were up to 2ch. POTS/ISDN
and analog RF video broadcasting.
CO
Customer Premises
ONU
POTS/
ISDN
STM
ONU
1.3um
WDM
TV
RF-IF
VONU
1.55um
FTF
WDM
1.3um
STM
OLT
1.55um
VOLT
1.3um
PSTN
Local SW
CATV HE
1.55um
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The impact of High-Speed Internet Access
The simple
system design
FTTH System cost reduction
Transmission speed increase
POTS/ISDN + Video Broadcast overlay STM-PON
Index
(Cost/bit)
100
10
1
0.1
10Mbps Internet
Access STM-PON
“BORSCHT”
100Mbps Internet
Access P2P MC
100Mbps Internet
Access B-PON
100Mbps Internet
Access GE-PON
“st”
0.01
19
97
19
98
19
99
20
00
20
01
20
02
20
03
20
04
20
05
20
06
20
07
20
08
0.001
Year
Index = (ONU&OLT system cost / line) / (Transmission speed of PON or P2P link)
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FTTH Growth in Japan
The number of users
FTTH Internet access moved into full swing in 2000.
In 2006, DSL shifted to decrease.
More than 11million FTTH lines in Japan today.
Million
16.00
14.00
12.00
10.00
CATV
DSL
8.00
FTTH
6.00
ADSL (NTT)
FTTH (NTT)
4.00
2.00
20
02
Q
02 2
Q
03 4
Q
03 2
Q
04 4
Q
04 2
Q
05 4
Q
05 2
Q
06 4
Q
06 2
Q
07 4
Q
07 2
Q
4
0.00
Geneva, 19-20 June 2008
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Source : Ministry of Internal affairs and communications statistics database
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FTTH System Configuration today
Since 2004, GE-PON has deployed for FTTH.
IP-based services: Internet access, PSTN-quality VoIP and IP-TV
RF Digital video broadcasting service over GE-PON
Customer
Premises
NTT CO
ONU with
VoIP-TA
1.49um
1.31um
WDM
Internet
service
providers
GEPON-OLT
ER
WDM
NGN Network
1.55um
Splitter
(1:8)
Splitter
(1:4)
STB
CA/SIP
Server
V-OLT
Contents
Providers
Video Provider
V-ONU
Video
HE International
RF
Coax
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GE-PON Functions and Stds.
For the “carrier-grade” system operation, the
functional specifications of “out of standards” will
be well-designed.
OAM
Management
Entities
ALM
TST
Monitor
Supervise
Etc.
System Control Ops
Authentication
IEEE802.1
Bridge
OAM
MPMC
DBA
MAC
Emulation layer
Encryption
PHY
IEEE802.3
IEEE802.3
IETF&IEEE802.3
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Move to Next Step
NTT plans 20-Million FTTH lines by 2010 and
further deployments all over Japan.
The issues for next step will be
Efficient deployment in various areas
OPEX reduction
Power saving
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Further Efficient Deployment
The new type of physical / logical topology would
stimulate operators to deploy FTTH in various areas.
The harmonization of IEEE802.1, .3, ITU-T SG13, 15
becomes more important.
Ether-protection
G.8031
Ether-Ring
G.8032
ER
ER
Ether OAM
EFM OAM
MAC Control
SW
OLT
Geneva, 19-20 June 2008
OLT
SW
SW
OLT
OLT
SW
OLT
10
SW
OLT
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OPEX Reduction
For OPEX reductions, shorten the time of
operation is the essential.
Installation
Faults detection and isolation
Fiber management
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Access Network Configuration
Aerial Section
FAS
connector
Aerial Closure
Fiber Termination Frame
Splitters
1:4
Splitter
Module
1:8
4000 fibers
termination
ONU
OTDR
FTF
ONU
Optical
cabinet
ONU
ONU
OLT
Underground Section
1000-Fiber cable
Geneva, 19-20 June 2008
O
L
T
Under Ground Closure
12
Tunnel
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In-house Wiring
Significant improvement in wiring to the ONU.
Right-angled bend
Rolled up
Optical connector
rosette
Folded
Knotted
Free Bending Optical Fiber Cord
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Optical
Testing and
Maintenance
Technologies
Testing Technologies with
High Resolution OTDR
Faul
t
#2 ONU
#1 ONU
ONU
OTM
Brunched section
ONU
ONU
Operation
and
Management
Technologies
Geneva, 19-20 June 2008
#1
#2
#8
Initial
#1
#8
#2
Measured
Distance
OTM
Optical Splitter
Customer
house
Reflection value
Fault Detection and Fiber Management
IDM
OLT
Central
Office
ONU
Operation and
Management for Outside
Infrastructure Facilities
14
Identification and
Management for Optical
Cable in Central Offices
International
Telecommunication
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Power Saving
When we operate 40-million FTTH,
80% out of total power will be access networks.
50% out of them will be estimated from ONUs.
Power saving technologies, IEEE802.3az and “Sleep
mode” are the urgent developments.
Total Power
CR ER
Core NW
ER
SW
OLT
SW
OLT
More than 80% time
a day will be “IDLE” .
ONU
ONU
HDR BBR
PC
TV
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Summary
Commercial FTTH history
Significant cost reduction and transmission speed.
Simplified access system design.
Current FTTH
GE-PON is the mainstay of FTTH access system.
Internet access, PSTN-quality VoIP and Video services
FTTH enhancements for the next step
The technologies related new topology, OPEX reduction,
power saving will be required.
Geneva, 19-20 June 2008
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