Transcript Document

Progress in PON research in
PIEMAN and MUSE
Russell Davey
[email protected]
PIEMAN
Overview
•
•
•
•
Drivers for long reach access
Early feasibility results
Long reach access in MUSE and PIEMAN
Evolution to long reach access
Bandwidth Growth – The Margin
Challenge
100
Relative growth
90
80
Bandwidth
Bandwidth
70
60
50
40
30
Costs
20
10
Greater bandwidths
- New services
- Maintain/grow
revenues
0
2000
2004
2001
2005
2002
2006
2003
2007
2004
2008
2005
2009
2006
2010
100
But costs rise faster
Relative growth
90
80
70
Revenues
60
Revenues
… Margins are eroded
50
40
30
Costs
20
10
Incremental Costs
0
2000
2004
2001
2005
2002
2006
2003
2007
2004
2008
2005
2009
2006
2010
Reducing cost of bandwidth by simplifying network
Today
21C
Long
reach
Vision
1000 way
split
10 Gb/s
100 km
~100
Metro
Nodes
optical core
10 Gbit/s Bidirectional Transmission in 1024-way Split, 110 km Reach,
PON System
BERT (9.95Gbit/s)
Backhaul (100km SMF)
ONU
Rxpin
LE
Core
DWDM
Tx
10km SMF
ADM
Atten
ADM
Downstream 1535nm DWDM
18nm
TxXFP
Rxlin EDC
Upstream 1551nm CWDM
Super FEC (10.7Gbit/s)
BERT (9.95Gbit/s)
D. Nesset et al, ECOC 2005,
Paper Tu1.3.1
Enabling technologies
Transceivers
Electronic Dispersion Compensation
Downstream
Upstream
C-band tunable DWDM
XFP
2000 ps/nm dispersion limit
Integrated DFB/EAM
300-pin MSA
FEC
Super FEC code
7% overhead
6.8 dB NCG at 10-10 BER
Intel® IXF30009 Optical Transport Processor
DWDM reach extension of GPON to 135 km
Service or Metro node
Infinera
40 l
DWDM
Local exchange or CO
location
BT bespoke
transponder
total
x64
split
2.5 Gbit/s
oeo
FlexLight
OLT
Flexlight
ONUs
1.2 Gbit/s
125 km
10 km
l to Business
(e.g. 10G SDH))
R.P. Davey et al, OFC 2005,
Paper PDP35
Long reach PON with WDM backhaul
Service node
Would allow
integrated access
& backhaul
Non-FTTP
Customers
big
business
customer
WDM
long
FTTP
PON
Customers
Cabinet
Nx 2.5 or 10 Gbit/s
MSAN
copper
Reach of ~100 km
256x Split
GPON WDM SDH
Backhaul
Ethernet
Research roadmap to long reach PON
EU research collaborations
amplified
GPON
(60 km)
+ scale
protocol to
1024 split
+10Gbit/s
10 Gbit/s
LR-PON
(100+ km)
+colourless
ONUs
+WDM
in
backhaul
WDM
LR-PON
+tunable
optics
Flexible l
LR-PON
Greenfield
access
GPON
NonGreenfield
access
Powered
Cabinets
2007
PIEMAN
2012
Step 1: Amplified GPON
Adding amplifiers to GPON can be an interim solution for LR-PON
ONU
32-way
Split
= 17.5dB
4
X
4
ONU
ONU
ONU
60km
“Demonstration of Enhanced Reach and Split of a GPON System Using
Semiconductor Optical Amplifiers”
Derek Nesset, Dave Payne, Russell Davey and Tim Gilfedder
ECOC 2006
24-28 September 2006
Paper Mo4.5.1
Tx
Rx
OLT1a
Tx
Rx
OLT1a
MUSE organisation
WP A.4 GSB Standardisation
WP A.3 Techno-Economics
SP A
Technical Steering
and Consensus
SP B
MMBB
SP C
FMC
Long reach PON research in
SPE
SP D
SP E
Distributed
Node
nodes
consolid.
TF1 Access
architecture WP B1
& platforms
WP C1
WP D1
WP E1
TF2 First
mile solutionsWP B2
WP C2
(DSL)
WP D2
WP E2
(Optical)
TF3 Residential
WP B3
Gateways
WP C3
WP D3
WP E3
TF4
Lab trials
WP C4
WP D4
WP E4
WP B4
Proto and trial of E2E deployment scenarios
Consensus
Standards contributions
Exchange of info
in same area
MUSE Sub Project E - Node Consolidation
•
Lower cost by bypassing conventional local exchange and centralising the
functionality
– Develop long reach PON
– Optimal VDSL drop in long reach PON– explore opportunities for CWDM
•100 km reach
•TC layer (PON MAC layer) implemented
•Transponder at local exchange for upstream
PIEMAN
•
•
•
•
•
•
•
•
•
FP6 Call 4 IST
STREP
Strategic objective “Broadband for All”
Start date: 1st January 2006
Duration: 3 years
End date: 31st December 2009
Total person-months: 340
Total cost: €3.9m
EC contribution: €2.2m
PIEMAN target system design
90 km
Service node
up to 10 km
ONU
Local exchange
32 l
DWDM
10 Gbit/s
ONU
EDFA
EDFA
1-fibre
operation
in access
ONU
ONU
2-fibre
operation
in metro
PON
OLT
10 Gbit/s
EDFA
All ONUs
“colourless”
ONU
ONU
EDFA
ONU
ONU
up to 512 split
per l
•Longer term evolution of MUSE SPE
•10 Gbit/s upstream & downstream
•All optical at local exchange – no transponders
•Physical layer focus – no TC layer implemented
PIEMAN Workpackages
WP0. Project management
WP1. Architecture and overall system design
System design
Technoeconomics
91 MM
Target architecture & Subsystem
specification
WP2. 10 Gb/s PON optoelectronics
64 MM Electronics
WP3. Tunable ON U
WP4. Reflective ONU
Component
development
Component
development
Optical system
integration
Optical system
integration
Optoelectronics
Uplink integration &
proof-of-concept
87 MM
86 MM
Evolution from installed FTTP (GPON) to long
reach PON
Fibre lean
Evolve from installed GPON to long reach PON
to metro node
At day one install WDM
couplers in local exchange
LR-ONU
GPON
backhaul
GPON GPON
GPON
Local
Exchange
Cable
chamber
Fibre lean cable back
towards Exchange
GPON-ONU
GPON-ONU
•LR-PON ONUs and GPON ONUs share same fibre
using WDM
•GPON & LR-PON ONUs include wavelength blocking
filters
GPON-ONU
LR-ONU
GPON-ONU
LR-ONU
GPON-ONU
Upgrade scenario 1C step 2
to metro node
In time all users on one GPON will
individually change to LR-PON
LR-ONU
GPON
Now remove GPON OLT from local exchange
backhaul
GPON GPON
GPON
Until eventually there are no GPONs left
Local
Exchange
Cable
chamber
Fibre lean cable back
towards Exchange
GPON-ONU
LR-ONU
GPON-ONU
LR-ONU
GPON-ONU
LR-ONU
GPON-ONU
LR-ONU
GPON-ONU
LR-ONU
Fibre Spectrum Allocation
EDFA
ITU G694.1
DWDM grid:
Centre - 1532.52nm
100, 50, 25, 12.5 GHz spacing
ITU G694.2
CWDM grid
20±6.5nm
FSAN Video Distribution 1550-1560nm
FSAN Upstream 1260-1360nm
FSAN
FSAN Downstream 1480-1500nm
FSAN Reserved 1360-1480nm
FSAN Additional
digital services
1539-1565nm
FSAN Future
L band reserved
and unspecified
WDM
PON
‘O’ Band
1260-1360nm
1300
‘E’ Band
1360-1460nm
1400
‘S’
Band
14601530nm
1500
‘C’
Band
15301565nm
‘L’
Band
15651625nm
1600
Wavelength plan for LR-PON And GPON to share fibres
•
GPON wavelengths
– 1480-1500 nm downstream
– 1260-1360 nm upstream
– Optionally 1550-1560 nm for video overlay
•
•
This is not ideal from evolution perspective!
LR-PON likely to use erbium window
– As do most candidates for next generation PON (e.g. WDM-PON)
– If video overlay not used then ITU-T reserved 1535-1565 nm is an obvious
choice for LR-PON
•
Reserve L-band for diagnostics and/or future use
– If video overlay is used then L band may be best alternative (fibre performance
needs to be comfirmed)
•
Since GPON and LR-PON may share the same fibre their signals must not
interfere
– Need cost-effective wavelength blocking (narrow bandpass) filters in GPON
ONUs from the beginning
•
ITU-T recommend 1510 nm to remotely supervise optical amplifiers and this
seems a a good idea in LR-PON
– Or alternatively use ONT co-located with the amplifier to provide in-band
management (keeps 1510 wavelength available and will be lower cost)
Evolution from installed FTTCab to long reach
PON
FTTCab WDM overlay using optical taps
MSAN
backhaul
Local exchange
backhaul
Service node
(21C metro node)
DSL street
cabinet
copper
to
customers
Optical taps fitted at initial FTTCAB installation
Core
network
DSL street
cabinet
At day one install optical taps and wavelength blocking filter at cabinet
copper
to
customers
FTTCab WDM overlay using optical taps
fibre to some
customers
ONU
Local exchange
MSAN
backhaul
ONU
big split ~256
backhaul
Service node
(21C metro node)
DSL street
cabinet
copper
to
customers
DSL street
cabinet
copper
to
customers
Optical taps
Core
network
LR-OLT
• LR-PON ONT feeds cabinet DSL system
• Customers upgrading to FTTP connected to LR-PON
• Note original FTTCab optical Units need blocking filters
FTTCab WDM overlay using optical taps
fibre to some
customers
ONU
Local exchange
backhaul
MSAN
big split ~256
probably two stages)
backhaul
Service node
(21C metro node)
ONU
ONU
DSL street
cabinet
copper
to
customers
DSL street
cabinet
copper
to
customers
Optical taps
Core
network
LR-OLT
• LR-PON ONT feeds cabinet DSL system
• Customers upgrading to FTTP connected to LR-PON
FTTCab WDM overlay using optical taps
fibre to some
customers
ONU
Service node
(21C metro node)
Local exchange
ONU
big split ~256
ONU
DSL street
cabinet
copper
to
customers
DSL street
cabinet
copper
to
customers
Optical taps
Core
network
ONU
LR-OLT
When all cabinets fed with LR-PON then MSAN
and old backhaul can be recovered
FTTCab WDM overlay using optical taps
fibre to all
customers
ONU
Service node
(21C metro node)
ONU
ONU
Local exchange
ONU
big split ~256
ONU
Optical taps
Core
network
ONU
DSL street
cabinet
LR-OLT
When all customers on cabinets fed with LR-PON,
DSL cabinets can be recovered
copper
to
customers
FTTCab WDM overlay using optical taps
fibre to all
customers
ONU
Service node
(21C metro node)
ONU
ONU
Local exchange
ONU
big split ~256
Optical taps
ONU
fibre to all
customers
Core
network
ONU
ONU
ONU
ONU
big split ~256
LR-OLT
When all customers on cabinets fed with LRPON then DSL cabinets can be recovered
ONU
Fibre Spectrum Allocation
EDFA
ITU G694.1
DWDM grid:
Centre - 1532.52nm
100, 50, 25, 12.5 GHz spacing
ITU G694.2
CWDM grid
20±6.5nm
FSAN Video Distribution 1550-1560nm
FSAN Upstream 1260-1360nm
FSAN
FSAN Downstream 1480-1500nm
FSAN Reserved 1360-1480nm
FSAN Additional
digital services
1539-1565nm
FSAN Future
L band reserved
and unspecified
WDM
PON
‘O’ Band
1260-1360nm
1300
‘E’ Band
1360-1460nm
1400
‘S’
Band
14601530nm
1500
‘C’
Band
15301565nm
‘L’
Band
15651625nm
1600
Proposal: Use CWDM grid in 1360-1480 nm
range for FTTCab
G.652.A&B cable
Nominal
central
wavelength
(nm)
1271
1291
1311
1331
1351
1371
1391
1411
1431
1451
1471
1491
1511
1531
1551
1571
1591
1611
G.652.C&D cable
Minimum
attenuation
coefficient
(dB/km)
Maximum
attenuation
coefficient
(dB/km)
Minimum
attenuation
coefficient
(dB/km)
Maximum
attenuation
coefficient
(dB/km)
0.392
0.370
0.348
0.331
0.320
0.473
0.447
0.423
0.425
0.476
0.263
0.250
0.238
0.229
0.221
0.215
0.211
0.208
0.208
0.208
0.438
0.368
0.327
0.303
0.290
0.283
0.278
0.276
0.278
0.289
0.385
0.365
0.352
0.340
0.329
0.316
0.301
0.285
0.269
0.254
0.240
0.229
0.220
0.213
0.209
0.208
0.208
0.212
0.470
0.441
0.423
0.411
0.399
0.386
0.372
0.357
0.341
0.326
0.312
0.300
0.290
0.283
0.277
0.273
0.275
0.283
Taken from G.695 (01/2005)
Look to be 3
useable
wavelengths
– 6 if “dry”
fibre used.
Conclusions
• To reduce the cost of bandwidth, operators need to simplify
networks
• Long reach access is a way to achieve this
– ~100 km
– multiple wavelengths
– ~512 customers per wavelength
• Initial feasibility experiments have been reported
• MUSE and PIEMAN are taking the concept further
• Evolution is important
– Amplified GPON as first step
• In a fibre lean deployment, long reach PON will need to share
fibres with deployed GPON and FTTCab
– Can be achieved with WDM overlay
– As long as you pre-plan it
– For example blocking filters in GPON ONUs
Thank you
[email protected]
PIEMAN