OFC’10 Summary ---Core Networks Part III Avishek Nag.

OFC’10 Summary---Core Networks

Part IIIAvishek Nag

OFC’10 Technical Sessions on Core Networks

OMM: Path Computation and Routing I OMU: Path Computation and Routing II OThP:High Speed Routing

OTuG: Network Architecture and Control I OWR: Network Architecture and Control II OWH: Restoration and Protection

OTuK: Quantum Communication Symposium II: Networking

OWM: Advanced Networking Technologies

OWY: Energy Efficiency and Next-Generation Networks

OFC’10 Technical Sessions on Core Networks

OTuK: Quantum Communication Symposium II: Networking

OWM: Advanced Networking Technologies

OWY: Energy Efficiency and Next-Generation Networks

NFOEC’10 Technical Sessions on Core Networks

NTuA: Network Design NThA: Network Restoration NThE: Multi-Layer Networks NMD: Converged Networks NWA: Advanced Network Applications NThF: Next Generation Optical Network Technology NMB: Migrating to 100G NTuB: High Speed Network Technologies NWC: Network Testing and Characterization

Quantum Communications Symposium IICode Title Author/Affiliate Topic Trends

OTuK1

Quantum Communications in Reconfigurable Optical

Networks: DWDM QKD through a ROADM

N. A. Peters et al.;colaboration between Telcordia Tech., Los Alamos Natl. Lab and Laboratories for Telecomm. Science, USA

Efficient methods of quantum key distributions in optical networks

OTuK2

Quantum Key Distribution on a 10Gb/s WDM-PON

I. P. S. Choi and P. D. Townsend

University College Cork, Ireland

Demonstrates coexistence of classical and quantum signals for quantum key distribution in a DWDM reconfigurable networking environmentusing a ROADM. shows how the limiting noise mechanism can depend onthe link configuration.

Demonstrates the first 10GHz clock-rate, differential-phase-shift-keyed quantum keydistribution system on a 10Gb/s multi-user WDM-PON network. A dual feeder fiber scheme is used to reduce spontaneous Raman scattering-induced inter-channel cross-talk.


OTuK3

Implementation of a High-Speed Quantum Key Distribution

System for Metropolitan Networks

Akihisa Tomita et al.; NEC Corporation, Japan


OTuK4

An application-oriented hierarchical quantum

cryptography network test bed

Zheng-Fu Han et al.; UST China and

Information Engg. Institute, China

A solution for high-speed QKD systemequipped with lowloss receivers with high visibility, highly efficient photon detectors with small dark countprobability, and a stable clock synchronization system is proposed.

A hierarchical metropolitan quantum cryptography network upon the inner-citycommercial telecom fiber cables is reported in this paper.


OTuK5

Passive Decoy State Quantum Key Distribution with

Coherent Light

Marcos Curty et al.; Univ. of Vigo, Spain, Univ. of Waterloo, Canada, University of Toronto, Canada, University of Erlangen-Nürnberg, Max Planck Institute for the Science of Light, Germany


Proposes a simple method for passive preparation of decoy states in quantum keydistribution with coherent light. It involves linear optics together with a photo-detector. Theperformance is comparable to the active decoy schemes.

Advanced Networking TechnologiesCode Title Author/Affiliate Topic Trends

OWM1

Ring Topology Based Mesh Sensing System with Self-healingFunction using FBGs and AWG

Chung-Yu Wu et al.; National Tsing Hua Univ. Taiwan, National Taipei University of Technology Taiwan

Non-conventional, off-the-shelf Networking Technologies; Hardware Implementation

OWM2

Simultaneous 3 × 10-Gbps Optical Data Transmissionin 1-μm, C-, and L-wavebands Over a Single Holey Fiberfor Ultrabroad-Waveband Photonic Transport System

Naokatsu Yamamoto et al.; NICT Japan, Aoyama Gakuin University Japan

Experimental demonstration of a novel sensing system based on FBGsensors with comprehensive self-healing capability in a mesh-ring-based topology by utilizing theFSR and periodic filtering characteristics of the AWG.

Simultaneous 3 × 10-Gbps error-free photonic transmissions with clear eye-openingsare demonstrated in the 1-μm, C-, and L-wavebands by using an ultrabroad-waveband photonictransport system comprising a 3.3-km-long holey fiber transmission line.


OWM3Hardware Accelerated Impairment Aware Control Plane

Yixuan Qin et al.;

University of Essex, UK, Athens Institute of Technology and University of Patras, Greece

Non-conventional, off-the-shelf Networking Technologies; Hardware Implementation

OWM4

Implementation of High-speed Buffer Management for

Asynchronous Variable-length Optical Packet Switch

Hideaki Furukawa et al.; NICT and Tokyo Institute of Technology, Japan

A hardware accelerated QoT estimation tool used in the DICONETimpairment-aware optical network. Performance evaluation is given by examining different networkscenarios in terms of network size and number of wavelengths.

An FPGA-based buffer management hardware with 8 input ports, whichimplements a parallel and pipeline mechanism to support over-200-Mpacket/s/port asynchronousvariable-length optical packet switching, is proposed.


OWM5

Recent Progress on OTDM Terabit/s Transmission and Their Future

Toshihiko Hirooka et al.; Tohoku University, Japan

OTDM transmission experiments with 1.28Tb/s signal over 70 km of fiber.

Energy Efficiency & Next Generation NetworksCode Title Author/Affiliate Topic Trends

OWY1

Advanced Technologies for Next-Generation Fiber Networks

Milorad Cvijetic, NEC Corporation

Contributions towards energy efficient Network design

OWY2Energy Efficiency Limits of Load Adaptive Networks

Christoph Lange and Andreas Gladisch, Deutsche Telekom Laboratories, Germany

Review of key advanced technologies for next-generation optical networking. Advanced physical layer techniques for 100 Gb/s transmission, packet-based transport in core and metro networks, and novel candidate architectures for next-generation optical access.

Based on traffic models the energy consumption of adaptive networks is compared tonetworks with constant power consumption.


OWY3

On the Energy Efficiency of Mixed-Line-Rate Networks

Pulak Chowdhury et al.; UC Davis Contribution

s towards energy efficient Network design

OWY4

The role of Arrayed Waveguide Gratings in energy-efficient

optical switching architectures

E. Bonetto et al.; Politecnico di Torino, Italy

Proposes AWG based optical switching fabric architectures and demonstrates their energy efficiency over electronic backplanes and interconnects

Evaluation of energy efficiency of mixed-line-rate (MLR)optical networks. A comparative study of energy efficiency of MLR and single-line-rate (SLR)networks shows that MLR is more energy efficient than SLR networks.


OWY5 Burst Switching for Energy Efficiency in Optical Networks

Shuping Peng et al.; Peking

University, China and University of

Melbourne, Australia Contributions

towards energy efficient Network design

OWY6

Energy-Awareness in Dynamic Traffic Grooming

M. M. Hasan et al.; UT Dallas

Energy consumption of electronic burst switching is modeled and compared to electronic packet switching in the network core and edge. It is shown that burst switching can provide significant energy savings relative to packet switching.

Energy-efficient traffic grooming scheme for promoting greener opticalnetworks. The scheme considers a modular node architecture, reuses already active componentsduring request allocations, and conserves total energy consumption in the network.

Migration to 100GCode Title Author/Affiliate Topic Trends

NMB1

107Gb/s DPSK-3ASK Optical Transmission over SSMF

Brian T. Teipen and Michael H. Eiselt; ADVA AG Optical Networking, Germany

100G: Solutions and Economics

NMB2Economics of 100Gb/s Transport

R. Saunders et al.; Opnext Inc., USA

Spectrally-efficient 100Gb/s coherent transponder technology in carrier networks can yield substantial CAPEX and OPEX savings. This paper discusses these economic gains and how a carrier can maximize their return on optical transport investment.

Report on the transmission of a 107Gb/s DPSK-3ASK optical channel over 335kmfiber (SSMF). DPSK-3ASK is targeted to meet the requirements of a metro network.

Migration to 100GCode Title Author/Affiliate Topic Trends

NMB3

Reach-Optimized Design for ULH Mesh Networks

Dah-Min Hwang; AT&T Labs, NJ, USA

100G: Solutions and Economics

NMB4

Network Innovations Brought by Digital Coherent Receivers

Takeshi Hoshida et al.; Fujitsu Limited, Japan and China

Operational efficiency improvements of optical networks enabled by digital coherent receivers arediscussed in view of reliability, agility, performance and reduced operational complexity. Several specifictechnologies are briefly introduced to deliver some more insight.

Propose an approach thatfirst designs each ROADM-to-ROADM section independently to minimize the OSNR penalty in each section. Then the whole network is examined to see if adding ROADM sites to long sections would be beneficial for reducing thenumber of regenerations in all possible paths.

High Speed Network TechnologiesCode Title Author/Affiliate Topic Trends

NTuB1

High Bit-Error Tolerant Frame/Lane Alignment

for 100 Gb/s Multi-Lane Transmission

Takuya Ohara et al.; NTT Network Innovation Lab. Japan

Standards and techniques for high-bit-rate transport

NTuB2

Mapping and Transport Standard for OTU4

Mark Loyd Jones, Tellabs

Study of high bit-error tolerant frame/lane alignment for 100 Gb/s multi-lane transmission withadvanced modulation formats. Bit-error allowance/correction for frame/lane alignment improvesthe bit-error tolerance up to BER of 10^-2

Recently revised ITU-T G.709 defines a container for 100 Gbps signals called an OTU4. Thispaper highlights some of the reasons the OTU4 bit rate, frame structure, and mapping scheme were chosen.


NTuB3

Continuously-Interleaved BCH (CI-BCH) FEC delivers best

in class NECG for 40G and 100G metro applications

Michael Scholten et al.; Vitesse Semiconductor Corp. USA


NTuB4

Continuous Phase Modulation as an Alternative to QPSK for

100 Gb/s Optical Links

Thomas F. Detwiler et al.;

Georgia Institute of Technology and Verizon Inc., USA

40G OTU3 performance results for Continuously-Interleaved concatenatedBCH (CI-BCH) FEC, demonstrating best-in-class performance for a 7% overhead hard-decisionFEC and offers option to tradeoff coding gain for reduced FEC decode latency.Constant envelope formats including CPM may reduce the impact of nonlinearimpairments arising from intensity variations and the associated nonlinear phase noise. The advantages of CPM versus QPSK are quantified and possible deployment opportunities are identified.


NTuB5

Transparent WDM Network with Bitrate Tunable Optical

OFDM Transponders

Axel Klekamp et al.; Alcatel Lucent Germany and Alcatel Lucent France


Reach estimations for several variable-bitrate OFDM schemes are presented anddiscussed in the framework of a transparent EU core network scenario. 44% reduction on OEinterfaces is found compared to a fixed-bitrate 40Gb/s network.

Network Testing and CharacterizationCode Title Author/Affiliate Topic Trends

NWC1

In-Service Chromatic Dispersion and Pass-Band Shape

Measurements for Light Path with Modulated ASE Source

G. Wellbrock et al.; Verizon and EXFO Electro-Optical Engg. Inc. Canada

Performance Monitoring of Networks

NWC2

In-Service OTDR for Passive Optical Networks

Y. Takushima and Y. C. Chung et al.; KAIST, Korea

A tunable modulated broadband source and narrow-bandwidth filter are used tomeasure chromatic dispersion, group-delay ripple, and pass-band shape of DWDM-network lightpaths. This new method is simple and suitable for in-service measurements.

Proposes a novel in-service optical reflectometry based on the correlation detectionusing a pseudo-noise signal superimposed on the downstream signal.Using the proposedtechnique, in-service monitoring of TDM and WDM PONs is demonstrated


NWC3

Determination of Localized Loss in Cabled Fiber Using

OTDR Measurements of Relative Mode Field Diameter

J. A. Nagel and S. L. Woodward; AT&T Labs, NJ, USA


NWC4

Optically Powered Low-Energy Demarcation Device for Monitoring FTTx

Networks

M. Roeger et al.; Karlsruhe Institute of

Technology and Alcatel Lucent Germany

Demonstration of enhanced sensitivity of a commercial OTDR by employing novel bidirectionalanalysis techniques. The method is applicable to measurements of cabled fiber where fluctuationsin local mode field diameter are due to factory variations.

Demonstration of an energy-autarkic FTTx monitor. A special protocol and sophisti-cated hardware reduce the electrical operating power to 0.7μW, which can be delivered by an optical supply signal of only 5μW/monitor at a separate wavelength.


NWC5

Area-efficient 100G+ EFEC calculation with Xilinx FPGAs

Michael Baxter and Gordon Brebner; Xilinix Research Labs, USA


NWC6

Intra-Channel Chromatic Dispersion Measurements with

Live Neighboring Signals in a Long Haul DWDM System

T. J. Xia et al.; JDSU Reasearch Labs, USA

This paper presents area-optimized implementations of Galois Field multipliers thatexploit the unique programmable logic cells in the Xilinx FPGA, enabling a 100 Gb/s EFEC blockwith significantly lower footprint within an optical transport FPGA.

A novel four-tone probe signal is used to measure end-to-end residual chromaticdispersion in single 50-GHz DWDM channels of a long-haul ROADM network while transmittingmore than 30 live signals in neighboring channels.

Conclusion Trends…

Quantum key distribution in optical networks Green networks Advanced networking paradigms Migration towards high bit rates and associated

technologies viz., OFDM, coherent receiver… Real time performance monitoring

OFC’10 Summary ---Core Networks Part III Avishek Nag.

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