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The Evolution of Optical Networking

This document explores the evolution of Dense Wavelength Division Multiplexing (DWDM) in both commercial and research educational networks. It highlights the growing demand for high-capacity optical networks driven by increasing WAN bandwidth requirements. Key aspects include the deployment of DWDM technology in national backbones by major providers and regional networks, efforts to simplify transport protocols, and the development of advanced optical infrastructures. The study addresses current limitations and future needs in optical switching and routing technologies essential for next-generation Internet exchanges.

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The Evolution of Optical Networking

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  1. The Evolution of Optical Networking DWDM in Commercial Networks • Fiber Relief/Increased Capacity Requirements • Numerous Newly Deployed National Backbones • Nexxia • Frontier • Quest etc. • Most deploying underlying SONET transport architecture to meet commercial needs

  2. The Evolution of Optical Networking DWDM in R&D/Educational Networks • Primarily Driven by • Requirement for increasing WAN bandwidth, I.e. OC-48 min. • Efforts to eliminate expensive/unnecessary transport protocols/infrastructure • CA*Net3 • NTON/Abilene/International Net’s? • Regional Nets now deploying DWDM Optical High-Speed Networks • BCNet • NCIT/CRC/NRC • RISQ • MREN

  3. New R&D DWDM Optical Networks CA*net 3 GigaPOP SRnet WURCnet Mrnet OC-12 ACORN Calgary Regina St. John’s BCNet Optical Net Winnipeg RISQ Optical Net NCIT/CRC Optical MAN Teleglobe Vancouver OC-48 OEP Halifax Ottawa Montreal STAR TAP OEP? MREN Optical MAN Seattle Pacific OEP? NTON/Abilene/C3 Toronto Chicago New York

  4. Direction & Results of This Evolution • Developing of Points of Convergence of Wavelength, High Bandwidth Traffic • Evolving towards Next Generation Optical Internet Exchange NAP’s in Several Locations • Ottawa, Vancouver, Chicago. Seattle? • Eventually will be numerous others across US and internationally.

  5. Future Needs/Present Problems • No available Layer 1/2 Optical Switching Devices with provisioning capability (replace ATM L2 PVC’s) • Present capabilities only allow static routing of wavelengths • Protocols for Next Gen. NAP’s • IP/ATM/DWDM • IP/DWDM • Frequency Conversion in Optical Hub • Optical Multiplexing in Router/Switch cards • Migration Path from Present Technologies

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