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Metro/regional optical network architectures for Internet applications
Per B. Hansen, Dir. Bus. Dev.Internet2’s Spring Member Meeting
May 3, 2005
2© 2005 ADVA Optical Networking. All rights reserved.
Outline
Research & Educational network needs Statically and dynamically routed networks The value proposition of dynamic network solutions Opposing demands driving the need for hybrid solutions Extending CWDM/DWDM hybrids to static/dynamic Mapping requirements to network architectures Summary
3© 2005 ADVA Optical Networking. All rights reserved.
Research & educational network needs
User characteristics Traffic characteristics
Power usersEthernet applications (Internet, E-mail, VoIP, server access,…)
Steady growthDependent of faculty and student growth rate
Mostly hubbedLarge fraction to few application servers
Super usersDepartment/project-driven high-capacity apps.
Variable needLimited predictabilityTemporary: 6 months to few years
Hubbed or meshedDepending on dept./project partners
Backbone trafficInfrastructure requirement driving capacity deployment
Steady growthAggregation of many sourcesGrowth dependent on demographics in general
Point-to-pointThrough/express traffic between two gateways
4© 2005 ADVA Optical Networking. All rights reserved.
Network and traffic examples
Point-to-point
Linear add/drop Ring
Westbound backbone gatewayEastbound backbone gateway
Hubbed
Meshed
Network connectivityTraffic example
5© 2005 ADVA Optical Networking. All rights reserved.
Flexible network infrastructure static routing in multi-service WDM rings
Rapid capacity and distance extension Cost-efficiency through integrated TDM Multiple protection options All data, storage, voice, and video applications–both legacy and next-gen
FSP Management Suite
Ethernet
SONET/SDH
Ethernet
SONET/SDH
Video
Video
Wavelength group add/drop granularity Optional group amplification for express traffic
6© 2005 ADVA Optical Networking. All rights reserved.
Flexible add/drop/through routing of channels Mandatory amplification for express traffic
Flexible network infrastructure reconfigurable routing
FSP Management Suite
Ethernet
SONET/SDH
Ethernet
SONET/SDH
Video
Video
SONET-like OAM Simplified network planning and engineering Remote wavelength provisioning Increased support for mesh and optical shared protection
7© 2005 ADVA Optical Networking. All rights reserved.
Flexible network infrastructure system evolution
simple, predictable complex, unpredictable
Network complexityunpredictable traffic growth
Static Fixed filters SFP Pre-configured
Static Fixed filters SFP Pre-configured
Dynamic ROADM Tunable lasers GMPLS
Dynamic ROADM Tunable lasers GMPLS
Cost
CAPEX and OPEXCAPEX only
8© 2005 ADVA Optical Networking. All rights reserved.
ROADM value proposition
Simplified network planning & engineering
Remote service
provisioning
Optical signal monitoring and control
Network robustness and upgradability
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Dynamic versus static
Static WDM advantages
Dynamic WDM advantages
Lower 1st installed costs (savings > 50%)
Lower equipment cost/service (savings > 50%)
Simpler installation & maintenance
CWDM & DWDM flexibility
Increased planning flexibility
Faster incremental service turn-up
Simpler service upgrades
Shared protection and mesh topologies
Lowest service costs CAPEX
Highest provisioning flexibility OPEX
CAPEX: Capital Expenditure OPEX: Operating Expenditure
10© 2005 ADVA Optical Networking. All rights reserved.
Carrier response
The success-based business model
CLECs/MSPs Very cost-sensitive Headcount/operations constrained Value economical features that benefit operations Value upgrade paths to accommodate growth on installed networks
MSOs Very cost-sensitive Operations constrained (change in skills) Value economical features that benefits operations Upgrade paths to accommodate growth is critical
11© 2005 ADVA Optical Networking. All rights reserved.
Static & dynamic
Static WDM advantages
Dynamic WDM advantages
Lower 1st installed costs (savings > 50%)
Lower equipment cost/service (savings > 50%)
Simpler installation & maintenance
CWDM & DWDM flexibility
Increased planning flexibility
Faster incremental service turn-up
Simpler service upgrades
Shared protection and mesh topologies
Lowest service costs CAPEX
Highest provisioning flexibility OPEX
CAPEX: Capital Expenditure OPEX: Operating Expenditure
Hybrid
12© 2005 ADVA Optical Networking. All rights reserved.
CWDM/DWDM hybrid platform as an enabler
Wavelength multiplex separates traffic between user groups and overcomes capacity bottlenecks
CWDM solutions significantly decrease the initial investment
Hybrid CWDM/DWDM solutions provide unique scalability
Total cost
Number of wavelengths
DWDM
CWDM
1 8
CWDM/DWDM Hybrid
DWDM allows for capacity growth
4
CWDM reduces first-in cost
-50%
13© 2005 ADVA Optical Networking. All rights reserved.
The real scalable platform
Relativecost
Scalability and complexity
CWDM-DWDM hybrid
Static/dynamic hybrid
Dynamic DWDM
Static DWDM
CWDM
Leveraging the right technologies with hybrid migrationLeveraging the right technologies with hybrid migration
14© 2005 ADVA Optical Networking. All rights reserved.
Hybrid/modular architectures
Full-band support in single device Static vs dynamic may be optional – but an
either/or decision All switching cost at first install
Partial-band support per device Static vs dynamic may be optional – but an
either/or decision Switching cost deferrable but no technology
savings options
Partial-band support per device Static/dynamic customizable to demand Switching cost deferrable with additional
technology savings optionsHY
BR
IDM
OD
ULA
RS
ING
ULA
R
15© 2005 ADVA Optical Networking. All rights reserved.
Mapping requirements to architectures
Traffic characteristics
A scalable hybrid network implementation
Steady growthPoint-to-point
Highest bandwidth at lowest costs Static routing of high-traffic demands Maximizing bandwidth per $
Granular provisioning on request Dynamic routing of frequent temporary demands UNI/NNI ready
Steady growthMostly hubbed
Variable needHubbed or meshed
16© 2005 ADVA Optical Networking. All rights reserved.
Networks experience a range of opposing demands Lowest cost of first install – lowest threshold to getting a service Maximizing utility – providing a service to all users within budget Maximum bandwidth – the biggest pipe for the money Option for advanced features – the problem of saying “no” and “never” …
Opportunities for optimizing a network design by Recognizing network topology Recognizing traffic demands with degrees of predictability Architecting a network solution that leverage that knowledge
A tool for all tasks: a hybrid network platform that supports a wide range of technologies from static CWDM to dynamic DWDM.
Summary
