Ethernet and TDM Sub-Wavelength Switching in Packet Optical Networking Platforms with a Centralized Switch
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1 Ethernet and TDM Sub-Wavelength Switching in Packet Optical Networking Platforms with a Centralized Switch Design and Developers Forum, Globecom 2008 Sunan Han Fujitsu Network Communications
2 The Integration of DWDM and Sub- Wavelength Switching Network cost efficiency: wavelength-only network versus wavelength + sub-wavelength network. Wavelength-only network draws analogy to airline operators utilizing airplanes of same size and fights of same frequency between any cities Integration stage one: SONET over DWDM MSPP overlaid with OADM or ROADM Integration stage two: ADM-on-a-Wavelength (ADM-on-Card/ Blade) build-in MSPP on optical transponders Integration stage three: Packet Optical Networking Platform (Packet-ONP) Sub-wavelength centralized switch in a ROADM that switches SONET/SDH, OTN and Ethernet packet traffic and transports aggregated traffic in DWDM 1
3 Economics: WL-Only versus Sub-WL Switching 2
4 SONET/SDH over DWDM DS3/OC-n/Ethernet-over-SONET/Other Data WSS: Wavelength Selective Switch DMX: Demux NB: Narrowband WB: Wideband ROADM: Reconfigurable Optical Add/Drop Multiplexer MSPP: Multi-Service Provisioning Platform 3
5 ADM-on-a-Wavelength (ADM-on-Card/Blade) OC-n/Ethernet-over-SONET/Other Data WSS: Wavelength Selective Switch DMX: Demux NB: Narrowband WB: Wideband ROADM: Reconfigurable Optical Add/Drop Multiplexer MSPP: Multi-Service Provisioning Platform 4
6 Packet ONP with a Sub-Wavelength Central Switch OC-n/ODUk/Ethernet-over-SONET/Ethernet/Other Data WSS: Wavelength Selective Switch DMX: Demux NB: Narrowband WB: Wideband ROADM: Reconfigurable Optical Add/Drop Multiplexer MSPP: Multi-Service Provisioning Platform : NB Optics Card 5
7 Trunk Aggregation Saving Line Cards ROADM Common Equipment Switch Fabric Packet-ONP 6
8 Client Global Aggregation Saving Client Cards ROADM Common Equipment Switch Fabric Packet-ONP 7
9 Cross Wavelength Connectivity ROADM Common Equipment Switch Fabric Packet-ONP 8
10 Elimination Of Ethernet and SONET Aggregation and Grooming Overlays 9
11 Example: Video Aggregation VoD Servers Linear video Video Router ROADM ROADM ROADM ROADM GE BRAS VHO 10GE Aggregation Switch/Router for VoD ROADM VSO GE VoD Servers BRAS Linear video VHO Video Router Packet ONP Packet ONP 10GE Packet ONP No Additional Aggregation Switch/Router VSO Packet ONP Packet ONP GE GE VHO: Video Headend Office VSO: Video Serving Office VoD: Video on Demand BRAS: Broadband Remote Access Server 10
12 Example: Video Aggregation Removal of Aggregation Device Removal of Hub Locations 11
13 Enabling Multicast Applications at Layer-2 Optical Drop and Continue for Linear Video ROADM Dedicated Wavelength Layer-2 Overlay Layer-2 To DSLAMs Layer-2 Multicast for Linear Video Packet ONP Shared Wavelength No Layer-2 Overlay To DSLAMs 12
14 WL Savings from WL Translation N-3 N-1 N-2 N-5 N-4 10G Wavelength Demands: N-1 to N-2 (Wave #1) N-1 to N-3 (Wave #2) N-1 to N-4 (Wave #3) N-2 to N-3 (Wave #2) N-2 to N-4 (Wave #2) N-3 to N-5 (Wave #1 & Wave #3) 13
15 Facilitating Optical Mesh Network Designs Packet ONP Wavelength level crossconnect and switching by WSS Inter/sub-wavelength switching takes place in the centralized switch, which allows for greater freedom in the provisioning of the trunk ports through which the demands are routed in a mesh network with subwavelength granularity and efficiency. the sub-wavelength level interconnectivity does not have to terminate to ports and can be remotely provisioned 14
16 Conclusions Packet ONP provides ROADM based DWDM transport and Packet and SONET/SDH level switching The integration of Packet, SONET/SDH and DWDM provides significant cost efficiency by granular aggregation and grooming, the elimination of overlay networks and the service diversity The Packet ONP architecture embraces carriers current network infrastructure, which is predominantly TDM, as well as provides an evolution path to an Ethernet dominated all-packet optical transport infrastructure. 15
17 16
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