Post on 18-Dec-2015
Photonic Integration: A Key Enabler for Reconfigurable Digital Optical Networks
Serge MelleVP, Technical Marketing Infinera
smelle@infinera.com
Infinera Confidential and Proprietary | 2
ROADM Benefits
Any wavelength at any node Simplify engineering and deployment compared to
fixed OADM Remote provisioning and reconfiguration Eliminate truck rolls to intermediate sites Reduce cost through OEO elimination – end-end
wavelength networking The underlying premise: less electronics + more
optics = lower cost But…
Infinera Confidential and Proprietary | 3
Wavelength Blocking in ROADM Networks
32-40 WDM
Allocate bandwidth on ROADM ring using available ’s Extending ROADM consumes ’s end-end across network… Blocking consumes extra ’s or requires OEO for conversion… ..or creates stranded bandwidth and faster capacity exhaust This does not scale with….
Protection; Hundreds of demands; Larger networks; Nodal connectivity
Infinera Confidential and Proprietary | 4
Sub-Wavelength Traffic in ROADM Networks
Typically many sub- end-end demands: GbE or OC-48/STM-16 Use “Muxponders” to aggregate 8-10 x 1G or 4 x 2.5G per wavelength Creates many point-point connections and complex planning New demands either strand bandwidth, or consume extra wavelengths Different muxponders for 1G and 2.5G compound complexity
New A-Z demand
Option 1:• New end-end and
muxponders • Inefficient wavelength fill• Stranded capacity & faster
capacity exhaustOption 2:• Use existing ’s and muxponders• Added cost from extra interfaces• Manual inter-connects at back-back sites
require truck rolls and extra OpEx
1G 1G2.5G 2.5G
4 x 2.5G
8 x 1G
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Lets Step Back: Benefits of Electronics in Optical Networks
Reach Improvement- G.709 standard defines 6dB gain FEC (Reed-Solomon)
- High-gain FEC provides optical gain of 8dB to 9dB
- Corrects BER of 10-3 to BER of 10-17
- Cost per chip: 10’s to 100’s of €
Dispersion Compensation- FFE and DFE can compensate upwards of 1000ps/nm
- MLSE can correct upwards of 3000ps/nm dispersion
- Significant space savings vs. DCF- Cost per device: 10’s of €
PM and Operations- OTH and SONET/SDH Overhead- Extensive digital PM at all OEO nodes
- J0/B1, BIP-8- FEC bit error rate monitoring- Communication channels for OAM&P
- SONET/SDH DCC and OTH TCM
Reconfigurable Switching- Wide choice of switching/grooming
granularity (VC-4, ODU-1, packet)- Fundamental to managing and
grooming customer services - Highest level of reconfigurability- Cost per chip: 10’s to 100’s of €
Infinera Confidential and Proprietary | 6
Relative Costs of OEO – The “O” vs. the “E”
High cost of OEO conversion compared to the cost for manipulating the data
Implementing feature-rich network & service functionality incurs a cost premium
Silicon cost is not the problem…
…it is the conversion cost from Optical to Electronic
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DWDM Laser
10G Modulator + Driver
10G Receiver + TIA50GHz ROADM portVT-1.5 Switch (10G)STS-1 Switch (160G)ODU-1 Switch (400G)
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10G
Accessing the Data Manipulating the Data
Infinera Confidential and Proprietary | 7
100 Gb/s Transmit
100 Gb/s Receive
Why are OEO’s Expensive? Discrete Optics
Infinera Confidential and Proprietary | 8
100 Gb/s Transmit
100 Gb/s Receive
100Gb/s Transmit
100Gb/s Receive
Infinera’s Photonic Integrated Circuit Innovation
5mm
DIRECT BENEFITS: Reduce size, power, cost and improve reliability
STRATEGIC BENEFITS: Low-cost OEO conversion re-enables digital networking
Result: Lower CapEx, lower OpEx, more flexible reconfigurable optical network
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Photonic Integration Enables a “Digital” ROADM
Use (analog) photonics for what it does best: transmission Use (digital) electronics for everything else – more functionality / lower cost Consistent with other network elements: SONET/SDH, switches, routers …
Digital ElectronicsDigital Electronics& Software& Software
Signal regenerationSignal regenerationError correctionError correctionPerformance monitoringPerformance monitoringSub-Sub-add/dropadd/dropSub-Sub- Grooming & switching Grooming & switching Multi-Service MultiplexingMulti-Service MultiplexingProtectionProtection
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optical (analog) electrical (digital) optical (analog)
Infinera Confidential and Proprietary | 10
Infinera DTN: First PIC-based Digital ROADM
100G per line card Digital ROADM WDM system
Distributed electronic OTU1 switch fabric
SONET/SDH, Wave and Ethernet-based add/drop
End-end GMPLS control plane Broadly deployed since 2004
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Reconfigurable “Digital” Add/Drop
Switched WDM with sub- grooming at all nodes Removes wavelength blocking constraints – any point to any point Maximizes WDM capacity on every link - no stranded bandwidth “Switched WDM” eliminates back-to-back transponder connections
“Mix and match” of 1G, 2.5G, 10G and 40G services on any wavelength Scales with network capacity, number of nodes, network size/distance
N x 100G WDMN x 100G WDM
N x 100G WDM
N x 100G WDM
Infinera Confidential and Proprietary | 12
Digital ROADM Service Provisioning & Engineering
Full Digital OAM&P at each Digital Node Optical link and impairments management isolated between nodes Optical service layer independent of optical transmission layer Eliminates all constraints on end-end service path Enhance access to PM and OAM&P data at all nodes Simplify network planning, system engineering and service turn-up
DigitalNode
DigitalNode
DigitalNode
DigitalNode
DigitalNode
A – Z ServiceDemand
“4R” OEO-based management
Optical link management isolated between nodes
Digital Link
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GMPLS-Enabled Networking at Every Node
GMPLS restoration capability in the transport layer with sub- circuit granularity
GMPLS-enabled end-end auto- provisioning between all nodes
Fiber Cut
GMPLS auto- discovery of circuit & physical topology of network & services
UNI signaling for IP-optical inter-networking
UNI
Infinera Confidential and Proprietary | 14
Architecture Impacts of Digital ROADMs
Unconstrained reconfigurability at every node
Sub- granularity for grooming, switching and add/drop
Consolidate DWDM transport & switching in core
Topology/distance-independent service activation
Support linear, ring and mesh topologies
Integrated sub- protection & restoration
End-end GMPLS control plane enables service automation
Extensive digital PMs and diagnostics
Robust digital protection
Infinera Confidential and Proprietary | 15
100 Gb/s Transmit
100 Gb/s Receive
Integration: Heart of a New Strategy
Thank You