Download Headline - TNC2009

Ultra-Broadband Next-Generation
Access Networks
Dres. Klaus Grobe + Jörg-Peter Elbers,
TNC2009, Málaga, June 2009
Agenda
 Broadband Access and Energy Efficiency
 NRENs with broadband Access
 WDM-PON vs. P2P vs. Next-Gen GPON
2
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Broadband Access and
Energy Efficiency
3
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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
4
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Energy Prices
As power demand grows, so does price, creating a double hit…
Cost [Cent/kWh]
7
Average Price of Electricity
to US Industrial Customers
6
5
Source:
eia – Energy Information Administration,
www.eia.doe.gov
33%
4
2000
2001
2002
2003
2004
2005
2006
2007
Cost [Cent/kWh]
10
Average Price of Electricity
to EU Industrial Customers
8
6
4
Source:
http://epp.eurostat.ec.europa.eu/portal/page
?_pageid=1996,45323734&_dad=portal&_sch
ema=PORTAL&screen=welcomeref&open=/&p
roduct=Yearlies_new_environment_energy&d
epth=4
32%
2
2000
5
2001
2002
2003
2004
2005
2006
2007
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Placing OSI Layers wisely
Buffers, 5%
 Power driver : IP look-up/forwarding engine
Switch
fabric,
10%
Control
Plane, 11%
 Always huge overhead for HVAC
Power / Heat
management,
35%
I/O, 7%
IP look-up and
forwarding engine,
32%
(Heat, Ventilation Air Conditioning)
 I/O – optical transport: lower in power
consumption than switch fabric, and
much lower than IP engine
Source: G. Epps, Cisco, 2007
 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)
6
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NRENs with
broadband Access
7
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Generic NREN
Large, dispersed Metro Campus, or
Cluster of Campuses
DC
DC
DC
DC
Redundancy
DC
DC
DC
Connection to
Backbone (NREN)
DC
Dedicated (P2P) Connection
to large Data Centers
DC
Core (Backbone) Router
DC Large Data Center
8
Layer-2 Switch
OXC / ROADM
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P2MP (WDM-PON) Connection
within large Campuses, or to
smaller Campuses
Flexible WDM-PON Options
Variable Bandwidth Assignment
OLT
RN
Layer-0 active (Amplification)
ONU
l1U/D
ONU
l2U/D
l3U/D
ONU
lnU/D
Ring Access (Protection)
ONU
OLT
RN
ONU
ONU
Dual Homing (Protection)
ONU
ONU
OLT
RN
OLT
RN
ONU
RN
ONU
OLT
ONU
OLT - Optical Line Termination, ONU – Optical Network Unit, RN – Remote Node
9
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ONU
Broadband NREN Access – WDM-PON
 Supports any bandwidth per wavelength –
up to 100 Gb/s per lambda
DC
 Potentially, supports multiple wavelengths
per client site
 Can be complemented with protection,
amplification, OAM (demarcation), and
active integrated Ethernet
DC
Flexible Remote Nodes
NREN
Backbone
ONU
ONU
FRN
L2
ONU
WDM OLT
FRN
WDM
ONU
PoP
OLT - Optical Line Termination , ONU – Optical Network Unit
10
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ONU
Integrated Ethernet / WDM-PON
WDM Mux/DMX
Protect
Passive Coupler
A
1+1/1:1 Switch
WDM
A
Work
Ethernet/WDM
ONU / CPE:
Demarcation,
OAM
WDM
Common O+E Controller
OLT / PoP
WDM:
Direct core
interworking,
Scalability
11
I/F
EFM/VLAN
...
...
WDM
WDM
WDM Mux/DMX
WDM
L2 Switch Card
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
Remote
Node (FRN)
Common O+E Controller:
Integrated management, provisioning, monitoring,
Same Control Plane, single DCN
WDM Amplification: Reach extension
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ONU
I/F
WDM-PON vs. P2P vs.
Next-Generation GPON
12
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Point-to-Multipoint (P2MP) Access
Active P2MP
PoP
Splitter PON
Passive
Splitter
PoP
WDM-PON
PoP
13
WDM
Mux/Demux
+
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
+
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
+
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
© 2009 ADVA Optical Networking. All rights reserved. ADVA confidential.
NG-GPON vs. WDM-PON
OLT
DWDM
Flexible Remote Node
FRN
SOA
F GPON
ONU
4-BS
GPON
OLT
2-BS
WDM
F WDM
SOA
 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)
OLT
FRN
AWG
AWG
CPE
EDFA
GbE
CPE
WDM
10GbE
 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
14
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Power Budgets (WDM-PON, NG-GPON)
CPE
WDM-PON, DFW
OLT
FRN
CPE
FRN
OLT
CPE
Power budget
Filter losses
Patch cord/connector losses
Optical path penalty
System margin
Link budget
Link loss/km
Link length in km
*)
OLT
OLT amp*
32.0 dB
12.0 dB
0.9 dB
2.0 dB
1.0 dB
16.1 dB
0.3 dB
53.7 km
32.0 dB
6.0 dB
0.6 dB
2.0 dB
1.0 dB
25.8 dB
0.3 dB
74.7 km
FRN amp**
60.0 dB
12.0 dB
1.2 dB
3.0 dB
1.0 dB
42.8 dB
0.3 dB
142.7 km
With EDFA-C-S20-GCB
**) With EDFA-C-D20-VGC and DCG dispersion compensation
FRN
OLT
Unamplified
FRN
CPE
G
1:64
Include Blocking Filters
NG-GPON
GPON
unampl.
WDM
unampl.
Power budget
Filter and splitter losses
Patch cord/connector losses
Optical path penalty
System margin
Link budget
Link loss/km
Link length in km
33.0 dB 36.0 dB
22.0 dB 27.0 dB
0.9 dB
1.2 dB
1.0 dB
1.0 dB
1.0 dB
1.0 dB
8.1 dB
5.8 dB
0.4 dB
0.3 dB
20.3 km 19.3 km
GPON
WDM
OLT ampl. OLT ampl.
37.0 dB
36.0 dB
22.0 dB
22.0 dB
0.9 dB
0.9 dB
1.0 dB
1.0 dB
1.0 dB
1.0 dB
12.1 dB
11.1 dB
0.4 dB
0.3 dB
30.3 km 37.0 km
33 dB (10G): +4 dBm…-26 dBm + 3 dB FEC gain, 36 dB (2G5): +4 dBm…-32 dBm
15
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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
WDM
OLT
Passive WDM Filter
16
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Cost Comparison
WDM-PON
Active P2MP
NG-GPON
Equipment
CapEx
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
17
© 2009 ADVA Optical Networking. All rights reserved. ADVA confidential.
Thank you
KGrobe@advaoptical.com
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