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• Packet Optical Transport– Fused Ethernet-WDM-ROADM– Connection-oriented Ethernet transport
tunnels
• Fewer layers, Ethernet begins todisplace SDH over time
Source: Infonetics Research2010 2011 2012+
Metro Service Mapping
Low Speed/Legacy
E1
E3
STM-1
STM-4
STM-16
STM-64
OTU0OTU1
OTU2
OTU3
10M
100M
1G
10G
100G
ESCON
FICON 2GFICON 1G
FICON 4GFICON 2G
1G FC2G FC4G FC8G FC
SD-SDI, ASI
HD-SDI3G-SDI
Rate
10 GE40 GE
Eth
FE
GE
SAN ApplicationsEnterprise/Business
Video protocolsBackboneTDM Transport
Signal Mapping – SDH, OTN, MPLS-TP?
E1
E3
STM-1
STM-4
STM-16
STM-64
STM-256
OTU0OTU1
OTU2
OTU3OTU4
10M
100M
1G
10G
100G
ESCON
FICON 2GFICON 1G
FICON 4GFICON 2G
1G FC2G FC4G FC8G FC
SD-SDI, ASI
HD-SDI3G-SDI
Rate
Eth
FE
GE
10 GE
MPLS-TP
OTN MPLS-TP or OTN?
40 GE
SDH
Protocol Transport Driver
WavelengthServices
PacketServices
TDMServices
ODU-1, ODU-2, ODU-3, ODU-4E-1
• Packet services are growing rapidlyand will no doubt dominate futuretraffic demands
•Wavelength services are growingas well and OTN is the only viablemethod available for core transport
•Growth in TDM services may beslowing, but demand is still strong
• Protocol conversion is not asefficient as native transport andswitching
100G
10G
1G
100M
10M
64K
E3STM-n
Technology Evolution
WDM
VC-4 & ODU-nSwitching
Packet
Ethernet & MPLSSwitching
GFP & VCAT
P-OTP
WavelengthSwitching
TDM-on-a-Wavelength
Packet OverWavelength
TDM
Triple Play of Transmission TechnologyTriple Play of Transmission Technology
Packet- OpticalTransport Platform
Packet Optical Transmission Platform
P-OTP
WDM
NG-ADM plus DWDM
I/O I/O…
WSS ROADM
OTP
I/O I/O
WSS ROADM
NG-ADM
NG-ADM
NG-ADM
NG-ADM+
NG-ADM+
NG-ADM+
NG-ADM+
NG-ADM+
NG-ADM+
NG-ADM+
NG-ADM+
• Evolutionary path from discrete network elements to a fully integrated platform• Wavelength Selectable Switch (WSS) provides multi-degree optical switching• Hybrid electrical switch fabric provides both TDM and Packet aggregation
TDM
TDM
Packet
TDM
Packet
PoS
TDM
HybridFabric
VCAT
PacketPacket
Transport Network Automation
OTN Control Plane
City A City BNational Network
• Enables new services such as Bandwidth on Demand, client self service, etc.•Reduces back office system development for the carrier•Network becomes the database of record
Core Router Connectivity
Router Router
P-OTP Architecture: Core RouterConnectivity via Transport MPLS
Current Architecture:Core Router Direct Connectivity
• Physical mesh connectivity is desired toreduce transit traffic•Router port and transport utilization islimited due to granularity•Reconfiguration flexibility is limited dueto granularity, speed, and control planeinteroperability