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FTTH Conference 2011 Workshop ALPHA Architectures Bart Lannoo IBBT Belgium
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FTTH Conference, FP7 workshop
Milan, Italy, Feb. 8th, 2011
ALPHA reference model for
techno-economics in access networks
Bart Lannoo – IBBT, Belgium
Kun Wang, Claus Popp Larsen, Anders Gavler,
Mikhail Popov – Acreo, Sweden
Dominique Chiaroni - Alcatel-Lucent Bell Labs, France
ALPHA – Architectures for fLexible Photonic
Home and Access networks
16/02/2011 - 2
Outline
Techno-economic reference model
Comparative model for different technologies
Cost elements
Equipment
Cable and fibre dimensioning
Case: CAPEX evaluation for next-generation optical access
(NGOA), focused on hybrid WDM/TDM PON
Benchmarked with 10G GPON and 1G AON
Different hybrid WDM/TDM PON options, for offering flexibility
16/02/2011 - 3
X
XX
X
X
CPE Remote node CO
AON homerun
Fibre branching
X
X
X
X
XTDM PON
Splitter
X
XX
X
XWDM PON
AWG
CPE Remote node CO
X
XX
X
XAON active star
Switch
X
TDM equipment Optical equipmentEthernet equipment
FTTx comparative model Equipment, topology, architecture
16/02/2011 - 4
Sustainable bandwidth 312Mbps
Peak bandwidth 1Gb/s
Number of subscribers
End to End services
No OPEX
Green fieldCosts composition
Network Element Infrastructure
OLT CPEONU
Fibre Ducts
Feeder Distribution & last mile
Civil workInstallation & Splice
PON 1 fibre solution, AON 2 fibre
AON +10% costs @ civil works,
ducts, fibre installation (closer to
end user, the less add-on cost)
Remote node costs:
TDM PON < WDM PON < AON
ONU: 10G GPON > 1G AON
Cost comparison 10G GPON vs. 1G AON Assumptions
Remote
node
16/02/2011 - 5
Multi Service
Edge Node
IP / MPLS core network/ Access Distributed network
OLT
CO
Aggregation switch
Home
Residential
1Gb CPE10Gb ONU10Gbps
RN
Residential
1Gb SFP1Gb CPE
10Gbps
Residential
1Gb CPE10Gb ONU
Splitter1:32
Residential
1Gb SFP1Gb CPE
Network elements
16/02/2011 - 6
2
1
RN1024
64 user
56,6m
Shared by 512 users
Shared by 256 users
Shared by 128users
Shared by 64 users
MDU (16 apt)
inp
inp
inp
inp
RN
CO
5000 users/km2
2km feeder
RN: 1024 users
Dimensioning: Urban
16/02/2011 - 7
3
2
1
Remote Node
1024
64 user block Shared by 512 users
Shared by 256 users
Shared by 128 users
Shared by 64 users
Shared by 32 users
Shared by 16 users
1 household
• 300 users / km2
• 10km feeder
Dimensioning: Rural
16/02/2011 - 8
Outline
Techno-economic reference model
Comparative model for different technologies
Cost elements
Equipment
Cable and fibre dimensioning
Case: CAPEX evaluation for next-generation optical access
(NGOA), focused on hybrid WDM/TDM PON
Benchmarked with 10G GPON and 1G AON
Different hybrid WDM/TDM PON options, for offering flexibility
16/02/2011 - 9
0
500
1000
1500
2000
2500
3000
3500
4000
10G GPON WDM 10G GPON(8 wavelengths)
WDM 10G GPON with mux
(8 wavelengths)
1G AON
Co
st p
er
su
bs
cri
be
r (€
)
Cost breakdown for considered FTTH technologies312 Mbps per customer, urban areas (5000 inh./km2)
Cat. 3: ONU Cat. 3: Flexible Node
Cat. 3: CO Cat. 2 (cables, fibres, cabinets)
Cat. 1: Feeder Cat. 1: Distribution
Cat. 1: In-building
0
500
1000
1500
2000
2500
3000
3500
4000
10G GPON WDM 10G GPON(8 wavelengths)
WDM 10G GPON with mux
(8 wavelengths)
1G AONC
os
t p
er
su
bs
cri
be
r (€
)
Cost breakdown for considered FTTH technologies312 Mbps per customer, rural areas (300 inh./km2)
Cat. 3: ONU Cat. 3: Flexible Node
Cat. 3: CO Cat. 2 (cables, fibres, cabinets)
Cat. 1: Feeder Cat. 1: Distribution
Cat. 1: Last mile
AON, 10G GPON, WDM 10G GPON
Urban vs. rural
Ref 1
NG PON with
WDM dimension
Ref 1
Ref 2
Ref 2NG PON with
WDM dimension
Keep ONU costs under control
• Higher TDMA rates seem infeasible
from a cost perspective
• Other multiple access techniques
come into the picture, like OFDMA
CAPEX evaluation for NGOA systemsBenchmarked with 10G GPON (ref. 1) and 1G AON (ref. 2)
16/02/2011 - 10
Hybrid WDM/TDM PON offers additional flexibility
1. Better bandwidth utilization, leading to energy savings
OLT
Turn off
16/02/2011 - 11
2. Easier network upgrades and extensions
Hybrid WDM/TDM PON offers additional flexibility
OLT
16/02/2011 - 12
1G
1G
1G
10G
3. Easier network evolution and migration
1G 10G
Hybrid WDM/TDM PON offers additional flexibility
OLT
16/02/2011 - 13
Hybrid WDM/TDM PON technologies for NG PON systems
WBS-PON: Wavelenght Broadcast&Select PON Only power splitters
+ : Simple / high flexibility
– : High power loss / Low security
WS-PON: Wavelength Split PON Power splitters and wavelength splitters (e.g. AWG)
+: Low power loss / High security / Little complex
– : No flexibility
WR-PON: Wavelength Routed PON Power splitters and optical switches (e.g. SOA, MEMS)
+: High flexibility / High security
– : High power loss / Complex
WSS-PON: Wavelength Selective Switched PON Power splitters and Wavelength Selective Switches (WSS)
+: Low power loss / Partial flexible / High security
– : Complex
OLT
ONU
OLT
ONU
OLT
ONU
OLT
ONU
16/02/2011 - 14
0
500
1000
1500
2000
2500
3000
3500
4000
WBS-PON WS-PON WR-PON WSS-PON Fully static
Fully flexible
Co
st p
er
su
bs
cri
be
r (€
)Cost breakdown for WDM/TDM PONs (312 Mbps, 8 wavelengths), for urban areas
Cat. 3: ONU Cat. 3: Flexible NodeCat. 3: CO Cat. 2 (cables, fibres, cabinets)Cat. 1: Feeder Cat. 1: DistributionCat. 1: In-building
Cost doubles for fully
flexible architectureLimited influence on the cost
Good perspectives for flexibility
Hybrid WDM/TDM PON technologiesCost breakdown (urban area) – cost/subscriber
16/02/2011 - 15
Hybrid WDM/TDM PON technologiesCost breakdown (rural area) – cost/subscriber
0
500
1000
1500
2000
2500
3000
3500
4000
WBS-PON WS-PON WR-PON WSS-PON Fully static
Fully flexible
Co
st p
er
su
bs
cri
be
r (€
)Cost breakdown for WDM/TDM PONs(312 Mbps, 8 wavelengths), for rural areas
Cat. 3: ONU Cat. 3: Flexible NodeCat. 3: CO Cat. 2 (cables, fibres, cabinets)Cat. 1: Feeder Cat. 1: DistributionCat. 1: Last mile
16/02/2011 - 16
Conclusions
Short/medium term
10G GPON and 1G AON are competitive solutions for offering higher bandwidths at the subscriber sides (cf. 312 Mbps / subscriber)
Longer term
Hybrid WDM/TDM 10G GPON
New functionalities with extra flexibility are made possible
– Load balancing (possibility to offer full bit rate of 10G)
– Energy saving
– Network extensibility and migration
Comparable CAPEX cost as 10G GPON or 1G AON systems
– Cost of transponders (ONU side) is an important issue that must be solved!
Good candidate for a NGOA (NG PON) system
Hybrid AON systems
By combining active switching and WDM PON and AON can offer even other functionalities
16/02/2011 - 17
Thanks!
Contact:
Bart Lannoo – [email protected]
Kun Wang – [email protected]
Dominique Chiaroni – [email protected]