Alcatel-Lucent 100 GbE User Manual

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100 Gigabit Ethernet (100 GbE)

Advanced Serial 100Gb/s Transmission Technology for Next Generation Optical Transport Networks

Context

Modern telecommunication networks need to be built with enormous traffic growth in mind. For example, today some internet exchange nodes have annual growth rates of more than 200% due to dramatic increases in users coupled with the needs of enriched data and broadband video services.

Accommodation of the global explosion in traffic (Figure 1) can only be assured by implementation of the most advanced high capacity optical metro/core transport network technologies. Soon networks based on next generation 40/100 Gigabit Ethernet (GbE) transport technologies will predominate. They will be based on standards currently under preparation by several standards organisations (e.g. IEEE, ITU-T).

DAT

 

 

 

 

A

THE

 

 

 

RAT

 

 

 

100Gb/s

ETHERNET

 

100GbE

EVOLUTION

 

 

 

40GbE

 

10Gb/s

ROADMAP

 

 

 

 

10GbE

 

 

 

 

 

1Gb/s

 

1GbE

 

 

 

 

 

 

100Mb/s

100MbE

 

40/100GbE will be

 

 

 

 

 

dominant transport

10Mb/s

10MbE

 

technology in next

 

generation optical

 

 

 

 

 

metro/core networks

 

1990

2000

2010

YEAR

Figure 1: Technology roadmap of optical transport networks. 40/100GbE will be dominant technology within the next decade.

Alcatel-Lucent’sconcepts andreal-timetrials demonstrate 100Gbe’s graceful introduction and evolution to meet operators’ future needs.

polarization mode dispersion (PMD), must be compensated or mitigated efficiently.

Spectral efficiency must increase, enabling 100Gb/s transmissions over exsiting 10/40G DWDM systems (50/100GHz channel spacing).

Complex integrated circuits for digital signal processing (DSP) and new very high-speedcomponents have to be developed usingstate-of-the-artelectronics and photonics.

Innovation

Alcatel-Lucenthas developed 100 Gbe concepts, shown prototypes and done field trials demonstrating its expertise in addressing future requirements.

Dispersion tolerant serial Nx100Gb/s DWDM transmission with high spectral efficiency

Figure 2 is a schematic of how high capacity Nx100Gb/s optical transmission is feasible over longhaul fiber links without dispersion compensation units (DCU) using conventional 10Gb/s DWDM platforms with narrow channel spacing (50GHz) corresponding to a spectral efficiency of 2bit/s/Hz.

2x28Gbit/s

Nx112Gbit/s

Fiber (dispersion, PMD)

 

 

wavelengths

QPSK

Tunable

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100G

 

A.O.

 

 

Coherent

 

 

 

 

RX

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QPSK

filter

 

 

 

 

 

 

 

 

 

2x28Gbit/s

SSMF

SSMF

 

 

 

Polarization Division Multiplexed

A.O.

 

 

Quadrature Phase Shift Keying

100km

 

 

Transmitter

 

 

 

 

x3

SSMF

SSMF

 

1

 

 

WSS

3 Optium

Figure 2: Nx100Gb/s Coherent PDM-QPSKDWDM transmission over 1200km laboratory fibre link.

Challenges

To get from here to there, several challenges associated with development and operation of ultrahigh speed components and systems for serial 100 Gbit/s optical transmission must be overcome:

Stronger transmission signal impairments associated with the upgrade of data rates, due to chromatic dispersion (CD) and

Verizon 100G field trial with live traffic

Alcatel-Lucent,in areal-timefield trial with Verizon (Figure 3), proved a 100Gb/s channel carrying a HDTV video signal can transmit parallel to existing live traffic 10Gb/s DWDM channels.

Alcatel-LucentInnovation Days – December 2008

Live HDTV Video Transmission over a 100Gb/s optical channel on Verizon national video

Figure 3: Verizon 100Gb/s transmission trial over 500 km link.

In a trial in Germany (Figure 4) dense-wavelength-division-multiplexed(DWDM)100Gb/s channels were sent efficiently overlong-haulfiber infrastructure exhibiting typical field transmission characteristics.

Darmstadt

Ladenburg

Karlsruhe

Stuttga

8x107G TX

L = 95.0 km

L = 79,7 km

L = 75,4 km

 

 

 

 

 

 

Nx100G over 500 km DTAG field fiber link

107G RX

Opt.

PMDC

Figure 4: 8x100Gb/s NRZ-VSBDWDM transmission over 500km installed field fiber with typical field transmission characteristics.

Scenario

A number of new broadband applications—HDTVdistribution, video downloading, data center content delivery,etc.—arefeeding continued traffic growth in metro/core networks. Figure 5 shows actual (2008) composition of network traffic. It illustrates that broadband/video services (e.g. video distribution, online video recording, YouTube, iPlayer...) already dominate network traffic. Important future traffic drivers will emerge from advanced applications like telepresence and sensor networks. In other words, we are only at the beginning of the expected explosion in both underlying traffic and the need for more bandwidth for sophisticated applications.

BB/Video

2%

 

Private Lines

 

 

 

11%

25%

 

Voice

 

 

Video Distribution

 

 

 

31% 2008

4%

 

 

27%

BB Internet/Residential Access

 

 

 

BB Internet /SME Access

Figure 5: Actual composition of network traffic (2008)

Regardless of what the future may bring in terms of new applications, the novel 100GbE-basedtransport technology represents an important step towards insuring the capacity and flexibility will be there to accommodate overall traffic growth requirements.

The proof can already be seen in the pioneering results on advanced 100Gb/s serial transmission achieved by Bell Labs. This include records in high capacity and spectral efficiency of Nx100Gb/s DWDM transmission, and first real-time100Gb/s field transmission trials with live traffic.

BENEFIT: Bell Lab’s expertise in 100Gb/s assures that operators are ready for the coming explosion inbandwidth-hungryapplications and services.

Contact: Gustav.Veith@alcatel-lucent.comSebastien.Bigo@alcatel-lucent.comwinzer@alcatel-lucent.com

Optical Networks Domain

Alcatel-LucentBell Labs

Résumé:

Nous sommes à la veille d'une explosion des besoins en bande passante, du fait de l'augmentation au niveau mondial du nombre d'utilisateurs et du développement d'applicationsophistiquées et riches en contenus. Les systèmes 100 GbE constitueront l'infrastructure dominante de prochaine générationqui sera déployée pour faire face à cet accroissement. Les hercheurs d’Alcatel-LucentBell Labs ont mis au point des concepts et réalisé des essais en temps réel sur le terrain qui démontrent qu'ils disposent de solides compétences dans le domaine dela

technologie 100 GbE. Grâce à ces compétences, ils p ermettent aux opérateurs de se préparer efficacement afin de rester réactif, quelle que soit l'évolution future du haut débit.

Alcatel-LucentInnovation Days – December 2008