Beyond 10 Gbps J. Livas Chief Technologist Core Transport Business Group.

Beyond 10 GbpsJ. LivasChief TechnologistCore Transport Business Group

©2004 Ciena Communications, Inc. Confidential and proprietary.2

What is a High Bandwidth Application?

Residential Triple Play

Voice

Standard Definition Video Distribution

High Definition Video Distribution

Games

Business Data

VPN

Storage

Multi-core Processors

Supercomputer GRID Interconnectivity

Remote Visualization

Specialized Applications

Mainstream Applications

LOW MEDIUM HIGH

3-40 Mbps

64 Kbps

20-1500 Mbps

few Mbps

few – many Mbps

many Mbps

Gbps

Gbps

Gbps

Research Data Collection Tbps


Common Arguments for 100 Gbps

Pro Con

1 Spectral Efficiency:

100 Gbps/400 GHz = 0.4 b/s/Hz

10 Gbps/25 GHz = 0.4 b/s/Hz

(SAME)

2 No physics driver (not a “magic” rate) Not a SONET/SDH rate

3 Op-simplicity: fewer channels to manage

Have more tribs – no ops savings unless tribs outside scope

4 Everyone else is doing it If everyone else were jumping off a cliff, would you jump too?

5 Economics: Relative Rate Electronics (Gbps) cost

2.5 1.0

10 2.5

40 6.2

100 16

Must include propagation costs Relative Rate Propagation Total System (Gbps) Cost Cost

2.5 0 1.0

10 1 3.5

40 10? 16?

100 20? 36?


Data Rate (Gbps)

Cos

t ($

/Gb

ps/

km

)

10 1

Long Haul

Data Rate (Gbps)

Cos

t ($

/Gb

ps/

km

)

10 1

Intra-Office

Total System Costs

Family of curves for each application space:

Data Rate (Gbps)

Cos

t ($

/Gb

ps/

km

)

10 1

Long Haul

Lowest Cost

PropagationCosts

ElectronicsCosts


Goal is Lowest Cost Transport

Lowest Cost Data Rate depends on Distance and Capacity

System Range:Cost Driver:

10,000 km

20G

10G

5G

2.5G

1.25G100 m 100 km 500 km 1500 km

Dat

a R

ate

for

Lo

wes

t C

ost

fo

r

~ 1

TB

PS

Cap

acit

y 40G

“Log” Distance

Parallel Optics Electronics Propagation Propagation

Intra-office Metro Long Haul ULH

Now

100G

Under development

Match the Answer to the Application


Increase Bit Rate or Tighter Spacing?

40GB @ 50 GHz Trade-Off 10GB @ 12.5 GHz

~1-2 years out (for volume)

Component supply Now

> x 4 Current cost baseline

~800 km Optical Reach ~800 km 2 km NDSF

dynamic trim (+$) Dispersion Tolerance 32 km NDSF

4 ps dynamic comp (+$)

PMD Tolerance 16 ps

~2 dB spectrum control (+$)

Power Ripple Tolerance

~5 dB

4 GHz locking/alignment 1 GHz

10GB @ 12.5GHz => Faster cost-effective deployment

40GB @ 50 GHz => Deployment in 0-1 years


Rx Trace 40G+10G 16spans TW-C 28 channels

-50

-45

-40

-35

-30

-25

-20

1525 1535 1545 1555 1565

Wavelength (nm)

Le

ve

l(d

Bm

)CoreStream:

Flexible Transport Platform for the Future One Platform for all applications

» FEC, Raman, and EDFAs allow CoreStream to handle span designs from 1600 - 3200km

» CoreStream is approved for NDSF, NZDSF, and DSF

» Transceivers for 2.5G and 10G GA today, 40G available for lab demos now.

» 50GHz (for ~3000km) & 25GHz (up to ~2000km) channel spacings

Cost is reduced by installing special technologies only where needed

25GHz systems can used to provide high capacities as 40G technologies become more cost effective

8 Channels10 Gbps25 GHz spacing

28 Channels40 Gbps100 GHz spacing

Channel Counts are C-Band only.

>3000 km, 80x10Gb/s NRZ @ 50 GHz

2000 km, 160x10Gb/s NRZ @ 25 GHz

Up to 1600 km, 40x40Gb/s CS-RZ @ 100 GHz or 160x10Gb/s NRZ @ 25 GHz

Numbers assume NDSF and 8 dB FECNumbers assume NDSF and 8 dB FEC

OADM Nodes

OADM Nodes

Data rates/channel spacing mixed at the sub-band level• Mixed rate deployment likely• Optimize Capacity x Distance for each sub-band separately

Data rates/channel spacing mixed at the sub-band level• Mixed rate deployment likely• Optimize Capacity x Distance for each sub-band separately


Demonstrated System Capabilitywith Raman

Fiber Type Best mixed 40/10G Capacity

Distance Total Capacity

NDSF 40ch x 40G 1600km 1.60Tb/s

DSF19ch x 40G + 24ch x 10G

1000km 1.00Tb/s

TW32ch x 40G + 16ch x 10G

1600km 1.44Tb/s

TW-RS 40ch x 40G 1600km 1.60Tb/s

E-LEAF32ch x 40G + 16ch x 10G

1600km 1.44Tb/s

• Capacity is for C-band propagation only• Pure 10G capacity is 1.92 Tbps• Distances are ~ 1200 km without Raman

• Capacity is for C-band propagation only• Pure 10G capacity is 1.92 Tbps• Distances are ~ 1200 km without Raman


Transparent Service MultiplexingAccess vs Transport Rate

Access Rate need not match Transport RateSeparately optimize for cost, convenience

Grooming is critical: integrated L0 + L1 + L?

What the What the Carrier sees:Carrier sees:“Economical transportof a variety of serviceswith a single platform”

100G Channel

DWDMDWDM DWDMDWDM

LogicalLink

LogicalLink

PhysicalLink

PhysicalLink

100GbE100GbEServicesServices

10G Channel100GbE100GbEServicesServices

SONET/SONET/SDH 10GSDH 10G

10 GbE10 GbE


10 GbE10 GbE

...


10 GbE10 GbE


10 GbE10 GbE

...

...


10GE for High Bandwidth ApplicationsStandards work needed?

10GE LAN PHY

10.3125 Gbps

9.995 Gbps

OTN OPU-2ODU-2

O/HOTU-2

O/H

10.709 Gbps

10.000 Gbps with 64B/66B

Encoding

10.037 Gbps

• 10GE LAN PHY expected to offer significant cost benefit compared to SONET OC-192c (e.g. PoS)

• Expected to become Intra-office interface of choice

– Server connections

– Router interface

• Transparency of Ethernet MAC can be important

• Solution for Transparent WAN connectivity not standardized

– Data rate not compatible with standard framing for OC-192 or ODU-2

– Supported using Agile Wavelengths today using OTU-2+ variation of G.709 (11+ Gbps)

10GE LAN PHY Transparency Issue


Hybrid Switching is Lowest CostTraffic Dependency

$-

$2.00

$4.00

$6.00

$8.00

$10.00

$12.00

$14.00

$16.00

$18.00

$20.00

0.24 0.7 8Total Unprotected Network Demand Bandwidth (Tbps)

Avg $/DS3(1,000s)

OpaqueSTS1/VC3

OpaqueSTS1/VC3Int WDMNo OADM

OpaqueSTS1/VC3Int WDMOADM

SelectiveWSInt WDMOADM

All OpticalWSNo WDM IntOADM

ES TodayES Today

ES with Integrated WDMES with Integrated WDM

WS SolutionsWS Solutions

Relative$ per

STS1/VC3$ per

100%100%

80%80%

60%60%

40%40%

20%20%

0%0%0.24 0.7 8

Total Unprotected Network Demand Bandwidth (Tbps)

SDH Grooming SwitchExternal DWDM Transmission

SDH Grooming SwitchIntegrated DWDM Transmission

Hybrid SolutionIWSS and selective SDH Grooming

Relative Cost per STS-1/VC3100%

80%

%60%

40%

20% 20%

0%

Hybrid SolutionROADM and

selective SDH Grooming

All-Optical Switch

IWSSIWSS

Thank You!

Beyond 10 Gbps J. Livas Chief Technologist Core Transport Business Group.

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Transcript of Beyond 10 Gbps J. Livas Chief Technologist Core Transport Business Group.