ultra-broadband next-generation access networks dres. klaus grobe + jörg-peter elbers, tnc2009,...
TRANSCRIPT
Ultra-Broadband Next-Generation Access Networks
Dres. Klaus Grobe + Jörg-Peter Elbers, TNC2009, Málaga, June 2009
© 2009 ADVA Optical Networking. All rights reserved. ADVA confidential.2
Agenda
Broadband Access and Energy Efficiency
NRENs with broadband Access
WDM-PON vs. P2P vs. Next-Gen GPON
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Broadband Access andEnergy Efficiency
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Applications and Requirements
Applications
Broadband access to (campus, university) sites (N x GbE, 10GbE, 40GbE)
Ultra-broadband connection between certain (DC) sites (N x 10/40/100GbE)
Application-specific requirements
Support respective ultra-high bit-rate protocols (10/40/100GbE, InfiniBand, FC)
Dedicated (high, guaranteed), secure bandwidths
Infrastructure requirements (in order to reduce energy consumption)
High maximum reach (up to 100+ km)
High per-client bit rates for respective number of clients
Keep it as simple and passive as possible
Optimized access network has high impact. Potentially, it allows to:
Eliminate sites incl. HVAC, or reduce complexity of sites
Eliminate / consolidate / integrate aggregation layers
Concentrate core L2/L3 functionality in fewer sites
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As power demand grows, so does price, creating a double hit…
Energy Prices
Source: eia – Energy Information Administration, www.eia.doe.gov
Average Price of Electricity to US Industrial Customers
Source: http://epp.eurostat.ec.europa.eu/portal/page?_pageid=1996,45323734&_dad=portal&_schema=PORTAL&screen=welcomeref&open=/&product=Yearlies_new_environment_energy&depth=4
Average Price of Electricity to EU Industrial Customers
33%
42000 2001 2002 2003 2004 2005 2006 2007
Co
st [
Ce
nt/
kWh
]
5
6
7
10
2000 2001 2002 2003 2004 2005 2006 2007
Co
st [
Ce
nt/
kWh
]
32%
2
4
6
8
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Source: G. Epps, Cisco, 2007
Buffers, 5%
IP look-up andforwarding engine,
32%
Power / Heat management,35%
I/O, 7%
ControlPlane, 11%
Switch fabric, 10%
Power driver : IP look-up/forwarding engine
Always huge overhead for HVAC
(Heat, Ventilation Air Conditioning)
I/O – optical transport: lower in power
consumption than switch fabric, and
much lower than IP engine
Replace L3 by L2 – and L2 by optical transport where possible
Concentrate in high-density routers/switches (data centers)
Use wired – optical – access incl. point-to-multipoint solutions (PON)
Replace L3 by L2 – and L2 by optical transport where possible
Concentrate in high-density routers/switches (data centers)
Use wired – optical – access incl. point-to-multipoint solutions (PON)
Placing OSI Layers wisely
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NRENs with broadband Access
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Generic NREN
DC
DC
DC
DC
DC
DC
DC
DC
DC
Large, dispersed Metro Campus, orCluster of Campuses
DC
Core (Backbone) Router
Large Data Center
Layer-2 Switch
OXC / ROADM
Connection toBackbone (NREN)
Dedicated (P2P) Connection to large Data Centers
P2MP (WDM-PON) Connection within large Campuses, or to smaller Campuses
Redundancy
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Flexible WDM-PON Options
Variable Bandwidth Assignment
ONU
ONU
ONU
RNOLT
1U/D
3U/D
nU/D
Ring Access (Protection)
ONU
ONU
ONU
RNOLT
Dual Homing (Protection)
ONU
ONU
OLT
OLT
RN
RN
ONU
Layer-0 active (Amplification)
ONU
ONU
ONU
RNOLT2U/D
OLT - Optical Line Termination, ONU – Optical Network Unit, RN – Remote Node
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DC
DC
Broadband NREN Access – WDM-PON
Supports any bandwidth per wavelength – up to 100 Gb/s per lambda
Potentially, supports multiple wavelengths per client site
Can be complemented with protection, amplification, OAM (demarcation), and active integrated Ethernet
PoP
Flexible Remote Nodes
WDMONU
FRN
FRNWDM OLT
L2
ONU
NRENBackbone
OLT - Optical Line Termination , ONU – Optical Network Unit
ONU
ONUONU
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Integrated Ethernet / WDM-PON
ONU
RemoteNode (FRN)OLT / PoP
...
I/F
L2
Sw
itch
Car
d
WD
M M
ux/
DM
XW
DM
Mu
x/D
MX
1+1/
1:1
Sw
itch
WDMWDM
WDMWDM Pas
sive
Cou
pler
WD
M M
ux/
DM
XW
DM
Mu
x/D
MXWork
Protect
WDMWDM
WDMWDM
...
WDMWDM
Common O+E Controller
EFM/VLANI/F
L2-WDM Switch Blade:Aggregation (incl. oversubscription) into 10GbE,Ethernet OAM, incl. Management channel (EFM),Possibly integrated EPON
Optical Line Switch OLT-PN:Alternative: Ethernet E2E protection
Common O+E Controller:Integrated management, provisioning, monitoring,Same Control Plane, single DCN
WDM:Direct core interworking,Scalability
Ethernet/WDM
ONU / CPE:Demarcation,OAM
AA
AA
WDM Amplification: Reach extension
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WDM-PON vs. P2P vs. Next-Generation GPON
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Point-to-Multipoint (P2MP) Access
+ Scalable and transparent bandwidth per customer
+ Highest security/availability due to physical/logical separation of customer links
– High fiber count in access network (i.e., high OPEX)
– High space and power consumption
PoP
PoP
Passive
Splitter+ Very low fiber count in feeder network part
+ Low port (interface) number, and space and power consumption in PoP
– Limited bandwidth and bandwidth upgrade
– Reduced security/availability in case of TDMA
– High insertion loss, low max. reach
PoP
WDM
Mux/Demux + Very low fiber count in feeder network part
+ Scalable and transparent bandwidth per customer
+ High security/availability due to optical/logical separation of customer links
– High port number in PoP equipment
Active P2MP
Splitter PON
WDM-PON
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NG-GPON vs. WDM-PON
Splitter-based GPON, running at 10 Gb/s downstream (2G5…10G upstream) DWDM overlay (40/80 channels, 100/50 GHz or C-/C+L-band)
AWG-based WDM-PON, running any bit rate per wavelength DWDM 40/80 channels (SFW or DFW), more possible Simple EDFA amplification for high reach
FRN
OLT
GPONOLT
4-B
S
WDM GPON ONU
WDMFF
FF
2-B
S
SOA
SOA
DW
DM
DW
DM Flexible Remote Node
OLT
GbE
CPE
10GbE
FRN
AW
GA
WG
AW
GA
WG
EDFA
WDM
CPE
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Power Budgets (WDM-PON, NG-GPON)
*) With EDFA-C-S20-GCB
**) With EDFA-C-D20-VGC and DCG dispersion compensation
Unamplified OLT amp* FRN amp**
Power budget 32.0 dB 32.0 dB 60.0 dBFilter losses 12.0 dB 6.0 dB 12.0 dBPatch cord/connector losses 0.9 dB 0.6 dB 1.2 dBOptical path penalty 2.0 dB 2.0 dB 3.0 dBSystem margin 1.0 dB 1.0 dB 1.0 dBLink budget 16.1 dB 25.8 dB 42.8 dBLink loss/km 0.3 dB 0.3 dB 0.3 dBLink length in km 53.7 km 74.7 km 142.7 km
OLT FRN
CPE
OLT FRN
CPE
OLT FRN
CPE
OLT FRN CPE
G1:64
FRN
Include Blocking Filters
GPONunampl.
WDMOLT ampl.
Power budget 33.0 dB 36.0 dBFilter and splitter losses 22.0 dB 27.0 dBPatch cord/connector losses 0.9 dB 1.2 dBOptical path penalty 1.0 dB 1.0 dBSystem margin 1.0 dB 1.0 dBLink budget 8.1 dB 5.8 dBLink loss/km 0.4 dB 0.3 dBLink length in km 20.3 km 19.3 km
36.0 dB22.0 dB0.9 dB1.0 dB1.0 dB
11.1 dB0.3 dB
37.0 km
WDMunampl.
GPONOLT ampl.
37.0 dB22.0 dB0.9 dB1.0 dB1.0 dB
12.1 dB0.4 dB
30.3 km
WDM-PON, DFW
NG-GPON
33 dB (10G): +4 dBm…-26 dBm + 3 dB FEC gain, 36 dB (2G5): +4 dBm…-32 dBm
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Security / Availability Aspects
NG-GPON
Customers are not independent (coupled via MAC layer)
One faulty ONU may corrupt the entire TDMA PON
WDM overlay also broadcasted via splitter infrastructure
Not acceptable by certain applications
WDM-PON, active P2MP
Physical separation via wavelengths or fibers
No common MAC layer, complete separation of customers
Also: can be easily complemented by optical protection
Passive WDM Filter
WDMOLT
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Cost Comparison
WDM-PON Active P2MP NG-GPON
EquipmentCapEx
Higher than active P2MP, similar to NG-GPON
Potentially, lowest Higher than active P2MP
Fibers Lowest fiber cost, supports site reduction due to high maximum reach
Higher fiber cost, but potentially high maximum reach
Low fiber cost, but limited in maximum reach
OpEx Lowest OpEx since application-specific solutions are avoided (also supports P2P WDM). Integrated aggregation, protection, OAM, L2 Eth.
Potentially high due to respective number of systems. Systems may also lack OAM and other capabilities.
Low for low-medium capacity requirements, but may require dedicated P2P solutions for high-capacity applications.
Energy Consumption
For any given product Bandwidth Distance, WDM-PON can minimize energy consumption
Typically, higher than WDM-PON, specially when amplified (discrete I/Fs, multiple amplifiers)
Only for short distances similar to WDM-PON, otherwise higher
Thank you
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