the german r&d programme komnet – on the way to the ... · on the way to the broadband...

IST OPTIMIST Workshop, Torino, 6th Feb. 2002 1K.-D. Langer

The German R&D Programme KomNet –On the Way to the Broadband Internet

K.-D. Langer

IST-OPTIMIST Workshop onTrends of Technologies for Photonic Networks

Politecnico di Torino, 6th February 2002

Heinrich-Hertz-Institut für Nachrichtentechnik Berlin GmbH


Outline

�� Motivation, Organisation, Topics

�� Long-haul Systems

�� Berlin Metro Network

�� Access Networks

�� Conclusions


Motivation and Organisation of KomNet

Development of key technologies for the emerging Broadband Internet, deployment and field testing of advanced networking technologiesin Germany

�� At present 17 R&D projects conducted by

�� Alcatel SEL �� T-Systems Nova �� Lucent Technologies�� Siemens �� VPI Systems �� Infineon Technologies�� Acterna

�� Subcontracts with 17 R&D Institutes and SMEs

�� Systems Integration Office: HHI

�� Budget: ~ € 75 Mill. (Industry and Government 50% each)

�� Period: 4 years


Universities

Industry & Operator

Research Institutes

Darmstadt, Hohenheim, AM

Stuttgart, RUSStuttgart, IND

Stuttgart,

HFT

INÜ

Acterna Alcatel SEL Infineon Technologies Lucent Technologies Piezosystem Siemens T-Systems

VPI systems

Participants


R&D Topics

� Long-haul Systems�� Metro Networks�� Access Systems

�� Network Elements�� Components�� Network Management�� Field Trials

KomNet Testbed(Based on Standard Single Mode Fibers)

Darmstadt

Mannheim

750 km

107 km

141 kmStuttgart

29 km

15 km

15 km

18 km

25 km

Berlin

Metro networkAccess network

Access network

Access network


Outline





�� Conclusions


750 km

Berlin

Stuttgart

Darmstadt

Mannheim

141 km

107 km

Long-haul Systems

40 Gb/s

WDM 8 x 40 Gb/sMulti-Vendor

WDM32 x 40 Gb/s

WDM 16 x 10 Gb/s(Single fiber bidirectional)

OTDM / ETDM160 Gb/s


N x 40 Gb/s WDM Field Testbed

Siemens, Lucent Technologies, T-Systems Nova, 2001

8 x 40 Gbit/s320 Gbit/s

80 Gbit/s

Darmstadt Mannheim

58 km 52 km2 x 40 Gbit/s

λ8 λ8

λ1

λ1

λ1

λ2 λ2

λ2* λ2*


DWDM Field Trial 32 x 40 Gb/s

Siemens, 2001BensheimDarmstadt

MZM

16 x 2.65 Gb/s(incl. FEC)

16 x LD(C-Band)

Ph.ModPBS

45°

10 kHz

MUX

DMUX

58 km SSMF

Inline EDFA

Pol DMUXCh. 1RX

DCF

Pol DMUXCh. 2

42.5 Gb/sETDMMUX

PBS

58 km SSMF

PBS = Polarisation Beam Splitter


Field Trials at 160 Gb/s

HHI, T-Systems Nova, Lucent Technologies, 2000

4 x

10 G

bit/s

e

e

116 km SSM fiber

o

o

40 Gbit/s

10 Gbit/s

10 Gbit/s eo

Ramanpump

Dispersioncompensation

160 Gbit/s

b) optisches + elektrisches Demultiplexen

a) optical demultiplexing

4 x

10 G

b it/s

eo

40 Gbit/s

b) optical + electrical demultiplexing


Raman Amplification

�� Practical use of Raman amplifiers tested in operational environment with in-place SSMF(fiber splices, connectors, cable assemblies, etc.)by T-Systems Nova and Lucent Technologies

�� Excellent Signal/ Noise Ratio (40 Gb/s system)

�� Low influence of non-linearities

�� Doubling of span count seems to be possible (compared to pure EDFA systems)


Status of Long-haul Systems

� WDM N x 10 Gb/s: Introduction/ optimisation

� WDM N x 40 Gb/s: Introduction in sight

� Raman amplification very probably will be used in 40 Gb/s systems

� 160 Gb/s (single channel): R&D

� Exploitation of FEC and Super FEC Ef

fect

ive

BER

1 0 -2 10 -3 10 -4 10 -5

1 0 -2

1 0 -6

1 0 -1 0

1 0 -1 4

1 0 -1 8

with FEC(ITU G.975)

Physical Layer BER

without FEC


Outline





�� Conclusions


Multi-Vendor Multi-Client Metro Network

Locationsin Berlin

16 x 2,5 Gbit/s ... 80 x 10 Gbit/s

2 x 8 x 10 Gbit/s

to / fromDarmstadt (750 km)

Access network

IP - WDMIP - WDM

Management

Vendor-independentprotocol

Reconfigurabletransparent network

Optical protection switching

2 x ~100 km SSM fiber

Multiple client transport

Transparentinterconnection


HUBs and OADMs of Metro Network

HUB HUB

Grating Demux

Fiberoptical MZI

Diel. filter

Coupler Coupler Coupler

Tunable FBGFBG

OADM OADMFunction

Mux / Add

Demux / Drop


ASON

ASON = Automatically Switched Optical NetworkOCC = Optical Connection Controller

Network-Management

Control Plane

A B

Connection A - B

Optical Transport NetworkOXC

OCC


10 Gb/s Burst-Mode Transceiver

Sampling phase

1 ns

Decision threshold

10 ns

Fast clock and data recovery

Alcatel, 2001


BER Estimation

Q-Factor measurement� In-service performance

monitoring of WDM channels� Independent of protocols� Quick and reliable BER

estimation

Vthreshold

BER

10-4

10-9

10-20ExtrapolatedCurves

BER_Histogram and BER_PseudoError versus OSNROSNR degradation by ASE noise generation without chromatic dispersion

1 E-01

1 E-05

1 E-10

1 E-15

1 E-25

1 E-20

1 E-30

1 E-3510

BER

15 20 25OSNR (dB)

30

BER_Histogram (8 G)

Bit Rate : 10 Gbit/sUndersampling frequency : 50 kHzPRBS : 2 - 115

BER_HP

Synchronisation loss

BER_PseudoError

35 40

Acterna, 2001 Alcatel, 2001

� Pseudo BER measurement

� Histogram + FFT method

� Good correlation with BER measurements


IP-WDM Transport and IP-Routing

Smart L2

IP

WDMProtocol Data Unit

CRC - 8 CRC - 16LengthFlag IP-Packet

CRC = Cyclic Redundancy Check

Classi-ficationEngine

RoutingUnit

Data Transfer

QoS-Module

Packet /Cell Ports

Manage-ment

IP-routing subsystem (Alcatel, University of Stuttgart, 2000)Reducedprotocol stackfor simplified

IP-WDM transport(Siemens, 2000)


Results achieved with Metro Network

� Configurable WDM ring network (up to 80 x 10 Gb/s) withdynamically switched OADMs and hybrid routing node

� Basic ASON field experiments� Burst transmission at 10 Gb/s� Demonstration of multi-client transport � Transparent interconnection of different network domains

(Long-haul & Metro) demonstrated� Testing of fault scenarios in optical multi-vendor networks

Summing up:� Automatic network configuration and switching comes within view� First steps towards seamless management and non-intrusive

performance monitoring have been done


Outline





�� Conclusions


OCDM Feeder for HFC Access Networks

Popt (dBm)-24 -22 -20 -18 -16 -14 -12 -10 -8

BER

10-1010-910-810-710-6

10-5

10-4

10-3

Tx 1: 155 Mbit/sTx 2: 155 Mbit/sTx 3: 155 Mbit/sTx 4: 1.25 Gbit/s

Experimental system 3 x 155 Mb/s +1 x 1.25 Gb/s (without synchronisation)

OCDM = Optical Code Division MultiplexingHFC = Hybrid Fiber Coax

Metro Network

BONT

HFC-System

5 km SMF

20 km

20 kmBurst-Mode TX

4 Channel OCDM System

RxeHEo

ANT

Tx IP / ATM-Router

RxTx

ANTIP / ATM-Router

OADM

Alcatel, 2001


Hybrid Fiber Radio (HFR) Access Network

Alcatel, 2001

HFR = Hybrid Fiber Radio

Stuttgart

Berlin

WDM-Ring

28 GHz

Long-haulsystems

Mediaserver

Kiosks

Schools

OADMInternetserviceprovider

Radiobase station

OADM


Summary on Access Networks

� Hybrid fiber coax platform providing high QoS for Internet services� Digital feeders for HFC systems and multiple access schemes

for PONs� Wireless point-multipoint (50 Mb/s) access schemes � xDSL systems (up to 10 Mb/s)

Summing up:� Linking last-(first) mile networks based on different technologies to

photonic core networks has been demonstrated� Exploitation of twisted pair lines for customer access has been

shown� How to provide a large number of customers with really high bitrate

Internet access at reasonable cost remains an open issue


Demand on Access Capacity

P. Cochrane (2001): “Life begins at 100 Mb/s”

102101

100

101

102

103

104

103 104 105 106

Information content (bits)

Res

p ons

e tim

e (m

s)

107 108 109

1 Gb/s

100 Mb/s100 Kb/s 10 Mb/s1 Mb/s

TeleworkingTelelearning

Information exchange,retrieval

Videoconf.

POTS

Interactiveentertainment

Source: HHI, 2000


Outline





�� Conclusions


Conclusions

� Key components, basic systems and networking technologies forthe future Internet have been trialed and demonstrated usingstandard fiber infrastructure

� Long-haul transmission systems linked together(Berlin - Darmstadt - Mannheim - Stuttgart, ~ 1,000 km)

� Interconnection with metro and access networks established

� Network-wide signal transport demonstrated

� Key experiments for next generation transmission systems andoptical networks successfully

� Proceeding R&D programme MultiTeraNet is in proposal phase


R&D Programme MultiTeraNet

Topics

� Flexible Optical Networks

� Access Networks

� Exploitation of Fiber Capacity ( > 50 Tb/s)

� Key Components & Technologies

Launch: May 2002

Initiated by the German Government (BMBF)


Final Remarks

Thanks to the KomNet project partners

for their inputs

Contacts for futher information:

see KomNet homepage

http://www.hhi.de/komnet

the german r&d programme komnet – on the way to the ... · on the way to the broadband...

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