Future optical internet atm will play a key role
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ADM ADM OXC ADM ADM OXC OXC OADM OADM IP over ATM Future Optical Internet ATM will play a key role Different Protocol Stacks Integrated to provide different size bandwidth pipes and CoS IP/ATM Network IP SONET Network IP/ATM Network IP SONET Network HDWDM OC-3084

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Future optical internet atm will play a key role l.jpg

ADM

ADM

OXC

ADM

ADM

OXC

OXC

OADM

OADM

IP over ATM

Future Optical InternetATM will play a key role

Different Protocol Stacks Integrated

to provide different size bandwidth

pipes and CoS

IP/ATM Network

IP SONET Network

IP/ATM Network

IP SONET Network

HDWDM

OC-3084

IP Optical Network

IP Sonet

IP Optical

QoS & VPNs up to OC3

Greater than OC-48

OC3, OC12, OC48


Future optical internet mpls atm l.jpg

IP over ATM

Future Optical InternetMPLS & ATM

ATM VCs

ATM VCs

SONET LSP

SONET LSP

DWDM LSP

IP Sonet

IP Optical

QoS & VPNs up to OC3

OC-48, OC-192

OC3, OC12


Optical internet architecture rings are dead l.jpg
Optical Internet Architecture“Rings are Dead”

Both sides of fiber ring

ring used for IP traffic

Traditional SONET

Transport Node

Traditional SONET

Transport Node

WDM

WDM

3 0C-48 Tx

2 OC-48 Rx

High Priority

Traffic

Cannot exceed

50% of bandwidth

in case of fiber cut

Asymmetric

Tx/Rx lambdas

that can be

dynamically

altered

Traditional SONET Restoral

Low priority traffic

that can be buffered

or have packet loss

in case of fiber cut


10xgbe cwdm l.jpg
10xGbE & CWDM

  • Several companies have announced long haul GbE and CWDM with transceivers at 50km spacing

    • 10GbE coming shortly

  • Costs are as little as $12K US per node (or transceiver)

  • Future versions will allow rate adaptive clocking for use with “gopher bait” fiber, auto discovery, CPE self manage

  • Excellent jitter specification

  • Most network management and signaling done at IP layer

  • Anybody with LAN experience can build a long haul WAN – all you need is dark fiber

  • Still some issues remain with OAM&P and frame jitter


Market drivers for gbe in the wan l.jpg
Market drivers for GbE in the WAN

  • Many ISPs, regional networks, municipalities, school districts are purchasing dark fiber or building dark fiber networks up to 1000 km rather than managed bandwidth

  • With dark fiber increased bandwidth only entails upgraded equipment costs and no additional monthly charges

  • Significant savings in relocating servers to central site and using VoIP

  • Also many carriers willing to sell “gopher bait” fiber (fiber that does not meet stringent SONET/DWDM requirements) at a discount

  • As such, cost of transmission equipment is becoming a significant factor versus cost of fiber

  • SONET and ATM networks require specialized engineering knowledge and skills

  • Customers want a technology in the WAN they are familiar with and that is easily extensible from the LAN e.g. Ethernet

  • Don’t require the same reliability as telco systems


Optical networks for the rest of us l.jpg
Optical Networks for the Rest of Us

  • With customer owned dark fiber, 10GbE and 4 channel CWDM anybody can build a 40Gbps network up to 1000km or greater at a fraction of cost of traditional telco network

  • May not be suitable for mission critical traffic (at least not yet)

  • But ideal for high bandwidth Internet to the school, small business and home

  • Ring structures are a customer option – not a mandatory requirement

  • The driver is NOT new applications, but cost savings –1 year payback

  • Typical cost is one time $20K US per school for a 20 year IRU

  • In Ottawa we are deploying a 60km- 96 strand network connecting 22 institutions – cost $500K US


Historical context l.jpg
Historical Context

  • In the 80’s the Information Highway was conceived as being a “gateway” service that would be operated by telcos and cablecos

    • They would define and deliver the services to the end used

    • But then came along the Internet…

  • Internet was built by research and education community as set of independent peering networks that exchanged information by a mutually agreed upon set of protocols – TCP/IP

    • There was no hierarchy or gateways as in the traditional carrier centric view of the world

    • The Internet empowered the end user not only to be a consumer of services but also an originator of services


Where are we going l.jpg
Where are we going?

  • Today the Internet is “virtual” network riding on top of a traditional “connection oriented” network of cooper and fiber

  • With optical technology such as customer owned dark fiber, customer owned wavelengths, 10GbE etc we can extend the model of the Internet as tool to empower the user to build networks autonomous peering optical

  • The future telecommunication’s world may be dominated by thousands of customer owned networks that peer at the physical as well as at the virtual level, “Optical Networks for the Rest of Us”

    • A national or provincial K-12 network with its own wavelengths and dark fiber

    • A national bank network with its own wavelengths and dark fiber

    • A national health network with its own wavelengths and dark fiber

  • A radical departure from the “carrier centric” view of the universe


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3 Different Views

SONET access ring

Telco Network

99.999% reliability only in the SONET

Ring for the telco, no guarantees for the

customer

CO

Cableco Network

99.999% reliability only in the SONET

Ring for the cableco, no guarantees for the

customer

ISP B

Customer Empowered Network

99.999% reliability to the customer but

no guarantees for the ISP

ISP A

2 separate dark fiber builds

ISP C


Customer empowered networks l.jpg
Customer Empowered Networks

Dark fiber Network

City C

Dark fiber or CWDM Network

City A

ISP B

ISP D

ISP C

ISP A

Dim Wavelength

Customer achieves 99.999

reliability by multi-home

to different ISPs

Optical Label

Switched Router

Long Haul DWDM

ISP C

ISP A

First Dark fiber Network

City B

ISP B

Second Dark Fiber Network


New challenges and opportunities l.jpg
New Challenges and Opportunities

  • “Customer empowered networks” present a whole new set of research challenges:

  • Peering and topology protocols in the optical domain – what will be the equivalent to BGP and OSPF in the optical domain

    • Multi Protocol Lambda Switching?

    • Defining LSP attributes such as power level, wavelength, encoding, etc?

    • Interdomain optical MPLS?

  • Customer controlled establishment of wavelengths, routing and service delivery

    • Auto discovery of wavelengths?

  • Management and interface systems, etc, etc


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