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Optical Networking: From Photons to Packets

Optical Networking: From Photons to Packets. Rajiv Ramaswami VP/GM Optical Technology Group. Optical Post Bubble. Outline. Network evolution Where are core networks headed? Where are metro/access networks headed?. Challenges: Capex Opex Service Velocity .

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Optical Networking: From Photons to Packets

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  1. Optical Networking: From Photons to Packets Rajiv Ramaswami VP/GM Optical Technology Group

  2. Optical Post Bubble

  3. Outline • Network evolution • Where are core networks headed? • Where are metro/access networks headed?

  4. Challenges: • Capex • Opex • Service Velocity Networks in TransitionToday: Service Specific Networks Voice Network (Circuit) Narrowband Access Network TDM Network (Circuit) Broadband Access Network FR/ATM Network (Packet) Radio Access Network Public IP Network (Packet) SONET/SDH Access Network Private IP/MPLS Network (Packet) Optical Network (Circuit) High Speed (Ethernet) Access Network

  5. Networks in TransitionFuture: One Network, Many Services TDM Network (Circuit) Broadband Access Network Public Radio Access Network 2.5G/3G/4G/WLAN IP/MPLS Network SONET/SDH Access Network Private High Speed (Ethernet) Access Network Optical Network

  6. WDM NG SONET NG SONET • Core networks: IP+WDM • Access Networks: NG SONET/SDH with packet integration • Boundaries between packet and optical blurring • Consistent interworking across optical and packet layers Access and core Networking:End-End Data Delivery Core Network Access Network Access Network IP/MPLS

  7. Optical in the Network Core Router Router Router Reconfigurable optical WDM layer with optical bypass O/E/O minimized---capex/opex reduction Switching for automated connection provisioning SONET-like look and feel Direct connections between routers SONET largely irrelevant

  8. Integration between IP and Optical In the Core Unified Management End-to-end optical layer onto which TDM, IP & wavelength services converge • Colored tunable interfaces directly on the router • A switched optical convergence layer • Integrated management • Integrated control plane Optical Layer Router Unified Control Plane

  9. Labor-intensive operation Complicated Network Planning Legacy DWDM Systems:Manual DWDM Network Life-Cycle Manual provisioning of optical design parameters Manual provisioning of equipment & topology into EMS/NMS Manual installation, manual power measurements and VOA tweaking at every site for every wavelength Manual DWDM processes: labor intensive and error prone Result: high OpEx costs

  10. Next Gen Optical LayerAutomated DWDM Network Life-Cycle Automated provisioning of all parameters EMS/NMS learns from the network and stays in sync Easy changes to design based on actual fiber plant Automated end-to-end lightpath setup Automated optical layer for end-to-end connection setup; Manual patching of client at end-points only Easy planning with sophisticated tool Simplified, graphical A-Z lightpath provisioning & trouble shooting Automated DWDM: simplified TDM-like installation and on-going operationResult: Reduces OpEx, facilitates wide deployment

  11. Next Gen Optical LayerEnabling Technologies Auto Node Setup ROADM Auto Power Control Planning & simulation tool Sophisticated EMS Automated optical layer for end-to-end connection setup; Manual patching of client at end-points only Easy planning with sophisticated tool Simplified, graphical A-Z lightpath provisioning & trouble shooting via CTM

  12. Data Storage Voice FC Voice 10/100 Services: DS-1/3 GE E1/3 ESCON Data OC-n 10GE STM-n NG SONET/SDH RPR MPLS DWDM/CWDM Transport: SONET/ SDH Metro/Access Network Evolution:Services and Transport technologies

  13. Delivering Data Services Option A: Overbuild for New Services Interoffice Rings Access Rings Office PoP New build versus … integrate data into TDM infrastructure Interoffice Rings Access Rings Office PoP Option B: Integrate New Services onto NG SONET

  14. Today’s Network:Transport is not aware of service layer DS0 DS1 Hub office / PoP End office DS3 (TDM container) ADM Cross-Connect Router DS1 Customer A DS0 DS3 DS1 Chan 10G Customer B DS0 DS1 DS1 Customer C DS3 (TDM container) ADM DS1 Customer D DS0 DS3 DS1 Chan 10G Customer E DS1 Customer F Low utilization from Customer site is carried all the way to the POP

  15. Tomorrow’s Network:Service aware transport MPLS Pseudowire Hub office End office Multi-Service Access Multi-Service Edge Router MSA Customer A Non-chan 1GE Customer B MPLS Pseudowire Customer C MSA Customer D Non-chan 1GE Customer E Customer F Packet aggregation at each stage improves utilization & density by 10x

  16. Yesterday Optical and IP separate NG SONET with L1 Ethernet Manually intensive WDM Tomorrow Ethernet/MPLS into optical WDM into routers NG SONET with L2 Ethernet, SAN, RPR, WDM Plug and play, reconfigurable WDM Summary

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