Transcript How do optical components enable tomorrow’s broadband

Next-Generation FTTH: Architectures
and Enabling Components
Rajeev Ram
MIT Center for Integrated Photonic Systems
In collaboration with Communications Futures Program
Optical Broadband Working Group
Industrial Group Members
JDSU
BT
Neophotonics
Motorola
Telecom Italia
Nokia
Alphion
Luminent
Intune
Broadcom
Ovum
Lightwave Research
Vitesse
Verizon
KAIST AT&T
Infinera
Additional Contributors
Corning
Novera
Cisco
UC Berkeley
FTTx Drivers
• Ever increasing demand for bandwidth, including IPTV
• Need to significantly lower network costs (rising faster
than revenue)
• Rapidly advancing technology and declining equipment
costs
• Public policy
• Standards
The Need for Speed
1000.000
?
DOCSIS 3.0
Channel bonding
GPON
NG
PON
VDSL2
Nominal Downstream Rate (Mbit/s)
100.000
?
?
PremiumBasic
10.000
DOCSIS 1.0
Cable
ADSL
1.000
DOCSIS 1.1
Rate caps imposed
r ye
e
p
1.3x
BPON*
Mid-tier
ar
Basic
ADSL2
Mid-tier
Economy
ADSL typical
residential
offerings
0.100
V.90
0.010
1995
1997
1999
2001
2003
2005
2007
2009
2011
2013
* Excluding analog overlay
2015
FTTX Deployment Status
• Worldwide deployment accelerating
– 11M subscribers in 2005
• Asia leading in users, but other regions rapidly rolling out
systems
• In the U.S., >1000 communities have FTTx service today
– 8M homes passed
– 1.3M subscribers, forecasted at >10M by 2011
• In Europe, forecast for 49% CAGR from 2005-10
– 25M Optical network terminals
• PON equipment sales of $965M in 2006, forecasted to
be $2.4B in 2010
Today’s Advanced PON
GPON Overview
2.4 Gbps shared
by up to 128 users
SmallONT
Businesses
2.4 Gbps out
1.2 Gbps in
1
OLT
Splitter
Splitter
10-100 Mbps
service rates
2
3
ONT
ONT
ONT
2
3
4
ONT
Splitter
ONT
1
20 km reach
Time Division Multiplexing
4
Splitter
New Buried
Development
ONT
Today’s Advanced PON
GPON Overview
POTS
ONT
Data
ONT
Video
Power &
Battery
Today’s Advanced PON
GPON Overview
Bandwidths & Services
Upstream
Downstream
1310 nm 1490 nm
Voice and
Data
Voice and
Data
POTS
1550 nm
Video
ONT
Data
ONT
Video
Power &
Battery
Today’s Advanced PON
GPON Overview
Bandwidths & Services
Upstream
Downstream
1310 nm 1490 nm
Voice and
Data
Voice and
Data
POTS
1550 nm
Video
ONT
Data
ONT
Video
Power &
Battery
Today’s Advanced PON
GPON Overview
Bandwidths & Services
Upstream
Downstream
1310 nm 1490 nm
Voice and
Data
Voice and
Data
POTS
1550 nm
Video
ONT
Data
ONT
Video
Power &
Battery
Fast Clockspeed Networks
• Convergence of telecom and access networks – a high
volume market for high performance components
– single frequency lasers & sensitive detectors
– new leaders
• 10x scaling of manufacturing and assembly
– More than 200k triplexers per month
• Driving new technologies for rapid deployment
– Burst mode electronics (shared bandwidth components)
– Broadband amplifier systems (reach extension to rural communities)
Next-Gen Broadband Architecture Options
Metro Core
Metro Edge
WDM-PON
LR-PON
GPON
Optical Access
Network
•WDM PON: Dedicated wavelengths (high capacity) per user
•Long Reach PON: Consolidation of metro (telecom) and access networks
Inventory Management for WDM PON
Metro Core
WDM-PON
–No bandwidth sharing on the transport layer
–Flexible and simple Bandwidth/Subscriber allocation
–Virtual POINT TO POINT (Secure Networks)
–Physical POINT TO MULTIPOINT (Shared Fiber Infrastructure)
Inventory Management for WDM PON
Metro Core
WDM-PON
Remote node in
manhole
Largest market for athermal ‘integrated’
wavelength filters
Inventory Management for WDM PON
Metro Core
WDM-PON
Remote node in
manhole
?
Largest market for athermal ‘integrated’
wavelength filters
How do you sell the same hardware to every user in a wavelength
selective network ?
Inventory Management for WDM PON
Metro Core
WDM-PON
How do you sell the same hardware to every user in a wavelength selective network ?
Injection Locking (KT Field Trial)
w/o filtered white light
w/ filtered white light
Modulate and reflect light to CO
Long-Reach PON Architecture
Metro Core
Metro Edge
Optical Amplifier
LR-PON
GPON
100 km reach
Optical Access
Network
1000:1 splitters
Trade CapEx for OpEx: Fund edge components by closing down COs
MIT Modeling Activity Overview
Demand
Demographics
Technological
Constraints
Operating
Context
Network Model
Inputs
Central Office
Siting
Network
Constraints
Splitter
Siting
Fiber Plant
Siting
Network Design
Model
Component
Costs
Network
Design
Network
CapEx
Labor
Costs
Resource
Costs
Network Cost
Models
Network
OpEx
Network Design Model: Validation
Scenario
Homes Passed
(1) BT
(1) MIT
(2) Corning
(2) MIT
7353
7228
71331
71176
Splitter Strategy
Non-Cascaded
1x32
Cascaded
1x4 1x8
Data Rate (Gbps)
2.5
2.5
Reach (km)
12
20
Central Offices
1
3
Route Length (km)
758
717
10357
10658
Stage 1 Splitters
263
294
2634
2607
Stage 2 Splitters
N/A
N/A
10658
10283
Model Inputs
Model Outputs
OpEx Involves Multiple Parameters
Network Components:
Model Input Parameters:
Intrinsic Failure Modes
ONT
Failure Mode FIT Rate Data
Fiber
Material Repair/Replace Costs
Extrinsic Failure Modes
Splitters
Observed FIT Rate Data
OLT
Man-hours to Repair/Replace
Connectors
Resource Costs
Power Costs
Splices
Rents
Non-OLT Central Office
Administrative Labor
Industry Data (Bottom-up)
Field Data (Top-Down)
OpEx By Network Component
Annual OpEx per Subscriber
$90
OpEx
$80
$70
$60
52% Savings
$50
$40
$30
Total
$77.59
Total
$37.38
BC
LR
$20
CO
Fiber
Hardware
$10
$0
5km
(3)
1x4,1x8
20km
(4)
1x4,1x8
(5)
Access Networks Designed for Change
• Convergence of telecom and access networks
– At the component level
– At the architecture and network level
– Drives working group discussions across the value chain
• Driving new technologies for rapid deployment
– Drives MIT research
• WDM Optical Network Unit development
• Burst Mode Electronics (1000x enhancement demonstrated in 2006)
• High performance, low cost optical components (record performance amps)
• Network OpEx models for driving architecture designs