PLNOG16: Planowanie sieci FTTx z wykorzystaniem technik T-WDM, Adam Grodecki

FTTx planning with TWDM
Adam P. Grodecki
adam.grodecki@nokia.com

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Agenda
1. 1. Standard status
2. 2. Why uTWDM in FTTx
3. 3. Architectural changes – steps of implementation
4. 4. Basic parameters changes
5. 5. New configuration concepts
6. 6. Few take-aways
7. 7.Q&A

Agenda
7. 7.Q&A

1. Standard status
Capacity
2010 2015
EPON
10GE-PON
DS:10G
US:1 or 10G
GPON IEEE
ITU-T

1. Standard status
Capacity
2010 2015
EPON
10GE-PON
DS:10G
US:1 or 10G
GPON
XG-PON2
DS: 10G
US: 10G
XG-PON1
DS: 10G
US: 2.5G
IEEE
ITU-T
NG-PON1

1. Standard status
Capacity
2010 2015
NG-PON2
DS: 40G
US: 10G/40G
EPON
10GE-PON
DS:10G
US:1 or 10G
GPON
XG-PON2
DS: 10G
US: 10G
XG-PON1
DS: 10G
US: 2.5G
IEEE
ITU-T
NG-PON1

1. Standard status
G.989.1
Basic
FSAN chooses TWDM
for NG-PON2
within ITU-T SG15
2012
G.989.2
Physical Layer
G.989.3
TC Layer
G.988
OMCI
XGS-PON
COMPLETED COMPLETED CONSENTED IN
JULY 2015 –
LAST CALL
WORK
STARTED
NO CHANGE IN
STANDARD IS
REQUIRED
Future
extensions
G.989.2
Am.1
CONSENTED IN
JULY 2015 –
LAST CALL

Agenda
7. 7.Q&A

2.Why uTWDM in FTTx
• Conceptually simple TDM
running at higher speed
• No impact on ODN
• Good statistical gain
• Chromatic dispersion
• High cost of optics
• Wavelength selection in
splitter or ONT
• Costly and operationally
challenging
Pure TDM PON TWDM PON DWDM PON
• Stack multiple PONs on the
same fibre
• Lower cost TDM optics
• Good statistical gain
• Bonded or unbundled
• Wavelength selection (in ONT
or splitter location)
• One wavelength per
subscriber
• Improved optical power
budget
Challenges
40/100G PON 1:n
40/10G ONT
40/10G ONT
n x 10G PON
10G ONT
1:s
10G ONT
10G ONT
2.5G ONT
DWDM PON
WDM ONT
WDM ONT
WDM ONT
WDM ONT

TWDM PON
4 x 10G PON
“XLG-PON”
40G TDM PON
WDM PON
40 x 1G PON
NG-PON2
2.Why uTWDM in FTTx

TWDM PON
4 x 10G PON
TWDM PON
4 x 10G PON
“XLG-PON”
40G TDM PON
WDM PON
40 x 1G PON

NG-PON2
2.Why uTWDM in FTTx

TWDM PON
4 x 10G PON
TWDM PON
4 x 10G PON
“XLG-PON”
40G TDM PON
WDM PON
40 x 1G PON
Lowest technological risk to acceptable
cost 40G architecture in 2015

NG-PON2
2.Why uTWDM in FTTx
optional extension to 8
wavelength-stacked TDM PONs

2.Why uTWDM in FTTx
2.5 Gbps DN
1.25 Gbps UP
1:128
20km
GPON
G.984.x1260

(in nm)
GPON up
GPON
down CATV
1280
1290
1330
1480
1500
1550
1560
1575
1580
1300
1320
1596
1603
1524
1540
1260

(in nm)
1G UP
1G
down
10G
downCATV
1280
1290
1330
1480
1500
1550
1560
1575
1580
1300
1320
1595
1625
1530
1540
1.25 Gbps DN
1.25 Gbps UP
1:32
20km
EPON
IEEE
1360

2.Why uTWDM in FTTx
2.5 Gbps DN
1.25 Gbps UP
1:128
20km
GPON
G.984.x
XG-PON1
G.987.x
10 Gbps DN
2.5 Gbps UP
1:256
40km
1260

(in nm)
GPON up
GPON
downXG-PON1 up
XG-PON1
downCATV
1280
1290
1330
1480
1500
1550
1560
1575
1580
1300
1320
1596
1603
1524
1540
1260

(in nm)
1G UP
1G
down CATV
1280
1290
1330
1480
1500
1550
1560
1575
1580
1300
1320
1595
1625
1530
1540
1.25 Gbps DN
1.25 Gbps UP
1:32
20km
EPON
IEEE
1360

2.Why uTWDM in FTTx
2.5 Gbps DN
1.25 Gbps UP
1:128
20km
GPON
G.984.x
XG-PON1
G.987.x
10 Gbps DN
2.5 Gbps UP
1:256
40km
1260

(in nm)
GPON up
GPON
downXG-PON1 up
XG-PON1
downCATV
1280
1290
1330
1480
1500
1550
1560
1575
1580
1300
1320
1596
1603
1524
1540
1260

(in nm)
1G UP
1G
down10G up
10G
downCATV
1280
1290
1330
1480
1500
1550
1560
1575
1580
1300
1320
1595
1625
1530
1540
1.25 Gbps DN
1.25 Gbps UP
1:32
20km
EPON
IEEE
XEPON
IEEE
10 Gbps DN
10 Gbps UP
1:128
20km ?
1360

2.Why uTWDM in FTTx
2.5 Gbps DN
1.25 Gbps UP
1:128
20km
GPON
G.984.x
XG-PON1
G.987.x
10 Gbps DN
2.5 Gbps UP
1:256
40km
NGPON2 (TWDM PON)
G.989.x
40 Gbps DN
Up to 40 Gbps UP
1:256
40km
1260

(in nm)
GPON up
GPON
downXG-PON1 up
XG-PON1
downCATV
1280
1290
1330
1480
1500
1550
1560
1575
1580
1300
1320
NGPON2
up
NGPON2
down
1596
Up to 4 or 8 TWDM channels
Each channel can be unique
2.5/2.5, 10/2.5, or 10/10G
1603
1524
1540
1260

(in nm)
1G UP
1G
down10G up
10G
downCATV
1280
1290
1330
1480
1500
1550
1560
1575
1580
1300
1320
1595
1625
1530
1540
1.25 Gbps DN
1.25 Gbps UP
1:32
20km
EPON
IEEE
XEPON
IEEE
10 Gbps DN
10 Gbps UP
1:128
20km ?
1360

2.Why uTWDM in FTTx
Mobile backhaulMassive
residential
MDU SOHO/SME Enterprise
P2P
GPON
TWDM-PON
Residential
GPON
TWDM-PON
GPON
XG-PON1
TWDM-PON
P2P
GPON
XG-PON1
TWDM-PON
PTP WDM
P2P
GPON
XG-PON1
TWDM-PON
P2P
PTP WDM
XG-PON1
TWDM-PON

2.Why uTWDM in FTTx
SMALL CELL
BACKHAUL
RESIDENTIAL FTTH
BUSINESS SERVICES
FTTB AND
REMOTE NODE BACKHAUL
FUTURE FTTH
2.5G/2.5G
2.5G/2.5G
10G/10G
10G/2.5G
TWDM PON
OLT
GPON

Agenda
7. 7.Q&A

3. Architectural changes – steps of implementation
GPON ONT#1
GPON ONT#2
G-PON setup
+
GPON LT
1260

(in nm)
GPON up CATV
1280
1290
1330
1480
1500
1550
1560
1575
1580
1300
1320
1596
1603
1524
1540
GPON
down

GPON ONT#1
GPON ONT#2
CEx
10 G-EPON optics setup
– NGPON2 compliance
+
+
NG-PON2 LT
NG-PON2 ONU #1
Coexistence Element
Only required when stacking multiple
wavelength bands (NG-PON2, GPON, 10G
EPON, XG-PON1, …)
1260

(in nm)
GPON upXGPON1 up
XGPON1
downCATV
1280
1290
1330
1480
1500
1550
1560
1575
1580
1300
1320
1596
1603
1524
1540
GPON LT
GPON
down

GPON ONT#1
GPON ONT#2
CEx
NG-PON2 setup
+
+
NG-PON2 ONU #3
WM
Coexistence Element
Only required when stacking multiple
wavelength bands (NG-PON2, GPON, 10G
EPON, XG-PON1, …)
Wavelength Multiplexer
Only required when
combining multiple NG-PON2
wavelengths (λ1, λ2, …)
NG-PON2 ONU #2
1260

(in nm)
XGPON1 up
XGPON1
down
CATV
1280
1290
1330
1480
1500
1550
1560
1575
1580
1300
1320
NGPON2
up
NGPON2
down
1596
1603
1524
1540
GPON LT
GPON
down
NG-PON2 LT
GPON up
NG-PON2 ONU #1

Splitter
Di-
plexer
10G RX
Di-
plexer
ONU XG-PONOLT XG-PON
2.5G TX
10G TX
2.5G RX
OLT TWDM-PON- 1st wavelength channel pair
ONU TWDM-PON
Di-
plexer 10G RX
2.5G TXDi-
plexer
10G TX
2.5G RX
Splitter

Splitter
Di-
plexer
10G RX
Di-
plexer
2.5G TX
10G TX
2.5G RX
ONU TWDM-PON
Di-
plexer 10G RX
2.5G TXDi-
plexer
10G TX
2.5G RX
Splitter
Additional
components
Combiner
100 GHz
channel
spacing
laser

Splitter
Di-
plexer
10G RX
Di-
plexer
2.5G TX
10G TX
2.5G RX
ONU TWDM-PON
Di-
plexer 10G RX
2.5G TXDi-
plexer
10G TX
2.5G RX
Splitter
Additional
components
Combiner
100 GHz
channel
spacing
laser
Tunable
* λ-filter

Splitter
Di-
plexer
10G RX
Di-
plexer
2.5G TX
10G TX
2.5G RX
ONU TWDM-PON
Di-
plexer 10G RX
2.5G TXDi-
plexer
10G TX
2.5G RX
Splitter
Additional
components
Combiner
100 GHz
channel
spacing
laser
Tunable
* λ-filter
Tunable*
* Small tuning
range allows for
lower cost
tunabilty in ONU

Splitter
Di-
plexer
10G RX
Di-
plexer
2.5G TX
10G TX
2.5G RX
ONU TWDM-PON
Di-
plexer 10G RX
2.5G TXDi-
plexer
10G TX
2.5G RX
Splitter
Additional
components
Combiner
100 GHz
channel
spacing
laser
Tunable
* λ-filter
Tunable*λdemux
* Small tuning
range allows for
lower cost
tunabilty in ONU

Splitter
Di-
plexer
10G RX
Di-
plexer
2.5G TX
10G TX
2.5G RX
Tunable*
ONU TWDM-PON
Di-
plexer Tunable
* λ-filter
λdemux
Additional
components
10G RX
2.5G TXDi-
plexer
10G TX
2.5G RX Combiner
Insertion loss of additional components must be overcome by some combination of
o Higher power lasers
o Improved receiver sensitivities
o Optical post- and/or pre-amplification
Splitter
* Small tuning
range allows for
lower cost
tunabilty in ONU
100 GHz
channel
spacing
laser

Agenda
7. 7.Q&A

4. Basic parameters changes
Loss budget classes (S|R CG)
Class N1 Class N2 Class E1 Class E2
Maximum loss 29 dB 31 dB 33 dB 35dB
Minimum loss = Maximum loss – 15 dB
wavelength plan
1260
1280
1300
1320
1340
1360
1380
1400
1420
1440
1460
1480
1500
1520
1540
1560
1580
1600
1620
1640
Wavelength (nm)
O-Band E-Band S-Band C-Band L-Band U-Band
10GE/XG-PON U/S
GPON U/S
(Narrow/Reduced)
B/GPON
GE-PON U/S
B/GPON
GE-PON D/S RF-Video
10GE/XG-PON D/S
TWDM PON
upstream
100 GHz CS
TWDM PON
downstream
100 GHz CS

Agenda
7. 7.Q&A

ITU-T G.984.1 specifies 4 redundancy types between OLT and ONT
Type A : spare fiber, no additional LTs or ONTs
Type B : redundancy to the splitter : redundant LTs and feeder fibers to the
first splitter
Type C: redundancy through the entire path: redundant LTs, fibers, primary
splitters and the drop (fiber to the ONTs)
Type D: similar to type C but also having redundancy in the two splitter
levels; the primary and secondary flexibility points
** Separate geographical paths required for two feeders to avoid
simultaneous fiber cuts **
5. New configuration concepts

protection
Fiber 1
Fiber 2
2:N splitter
LT1
LT2
Most common TYPE B redundancy known as A2A-Any to Any
Offer a full LT redundancy capability
The configuration provides redundant LTs and the optical fibers between OLT
and the first splitter
PONs are grouped into pairs, referred as a protection group
PONs within a protection group can be in different LTs or on the same LT but
always within the same shelf

Future optional approach – not cost effective yet

Few take-aways
uTWDM +NGPON2
is the most effective approach for multi service FAN
Can build HW systems today using shown concept
once XGS-PON standard is closed PHY will come in SW
Pay as you grow is possible(LT, CE, D/MUX separate HW)
OTDR implementation is available as in previous systems

Q&A

Adam P. Grodecki
adam.grodecki@nokia.com
Thank you

PLNOG16: Planowanie sieci FTTx z wykorzystaniem technik T-WDM, Adam Grodecki

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