OFC’10 Summary ---Core Networks Part III Avishek 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: NThA: NThE: NMD: NWA: NThF: NMB: NTuB: NWC: Network Design Network Restoration Multi-Layer Networks Converged Networks Advanced Network Applications Next Generation Optical Network Technology Migrating to 100G High Speed Network Technologies Network Testing and Characterization Quantum Communications Symposium II Code OTuK1 OTuK2 Title Author/Affiliate 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 Quantum Key Distribution on a 10Gb/s WDM-PON I. P. S. Choi and P. D. Townsend University College Cork, Ireland Topic Demonstrates coexistence of classical and quantum signals for quantum key distribution in a DWDM reconfigurable networking environment using a ROADM. shows how the limiting noise mechanism can depend on the link configuration. Trends Efficient methods of quantum key distributions Demonstrates the first 10GHz in optical clock-rate, differential-phasenetworks shift-keyed quantum key distribution system on a 10Gb/s multi-user WDM-PON network. A dual feeder fiber scheme is used to reduce spontaneous Raman scattering-induced interchannel cross-talk. Quantum Communications Symposium II Code OTuK3 OTuK4 Title Implementation of a High-Speed Quantum Key Distribution System for Metropolitan Networks An applicationoriented hierarchical quantum cryptography network test bed Author/Affiliate Akihisa Tomita et al.; NEC Corporation, Japan Zheng-Fu Han et al.; UST China and Information Engg. Institute, China Topic A solution for high-speed QKD system equipped with low loss receivers with high visibility, highly efficient photon detectors with small dark count probability, and a stable clock synchronization system is proposed. A hierarchical metropolitan quantum cryptography network upon the inner-city commercial telecom fiber cables is reported in this paper. Trends Efficient methods of quantum key distributions in optical networks Quantum Communications Symposium II Code OTuK5 Title Author/Affiliate Topic 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 ErlangenNürnberg, Max Planck Institute for the Science of Light, Germany Proposes a simple method for passive preparation of decoy states in quantum key distribution with coherent light. It involves linear optics together with a photodetector. The performance is comparable to the active decoy schemes. Trends Efficient methods of quantum key distributions in optical networks Advanced Networking Technologies Code Title OWM1 Experimental demonstration Chung-Yu Wu et of a novel sensing system Ring Topology Based based on FBG Mesh Sensing System al.; National Tsing Hua Univ. Taiwan, sensors with comprehensive with Self-healing self-healing capability in a National Taipei Function using FBGs mesh-ring-based topology by University of and AWG utilizing the Technology FSR and periodic filtering Taiwan characteristics of the AWG. OWM2 Simultaneous 3 × 10Gbps Optical Data Transmission in 1-μm, C-, and Lwavebands Over a Single Holey Fiber for UltrabroadWaveband Photonic Transport System Author/Affiliate Naokatsu Yamamoto et al.; NICT Japan, Aoyama Gakuin University Japan Topic Trends Nonconventional, off-the-shelf Networking Simultaneous 3 × 10-Gbps Technologies; error-free photonic transmissions with clear eye- Hardware Implementati openings are demonstrated in the 1-μm, on C-, and L-wavebands by using an ultrabroadwaveband photonic transport system comprising a 3.3-km-long holey fiber transmission line. Advanced Networking Technologies Code OWM3 OWM4 Title Author/Affiliate Yixuan Qin et al.; University of Essex, UK, Hardware Accelerated Athens Institute of Impairment Aware Technology and Control Plane University of Patras, Greece Implementation of High-speed Buffer Management for Asynchronous Variable-length Optical Packet Switch Hideaki Furukawa et al.; NICT and Tokyo Institute of Technology, Japan Topic A hardware accelerated QoT estimation tool used in the DICONET impairment-aware optical network. Performance evaluation is given by examining different network scenarios in terms of network size and number of wavelengths. An FPGA-based buffer management hardware with 8 input ports, which implements a parallel and pipeline mechanism to support over-200-Mpacket/s/port asynchronous variable-length optical packet switching, is proposed. Trends Nonconventiona l, off-theshelf Networking Technologie s; Hardware Implementa tion Advanced Networking Technologies Code Title Author/Affiliate Topic OWM5 Recent Progress on OTDM Terabit/s Transmission and Their Future Toshihiko OTDM transmission Hirooka et al.; experiments with 1.28Tb/s Tohoku University, signal over 70 km of fiber. Japan Trends Energy Efficiency & Next Generation Networks Code OWY1 OWY2 Title Advanced Technologies for Next-Generation Fiber Networks Energy Efficiency Limits of Load Adaptive Networks Author/Affiliate Milorad Cvijetic, NEC Corporation Christoph Lange and Andreas Gladisch, Deutsche Telekom Laboratories, Germany Topic Trends Review of key advanced technologies for nextgeneration optical networking. Advanced physical layer techniques for 100 Gb/s transmission, packet-based transport in core and metro networks, and novel candidate Contribution architectures for nexts towards generation optical access. energy efficient Network Based on traffic models the design energy consumption of adaptive networks is compared to networks with constant power consumption. Energy Efficiency & Next Generation Networks Code OWY3 OWY4 Title On the Energy Efficiency of MixedLine-Rate Networks The role of Arrayed Waveguide Gratings in energy-efficient optical switching architectures Author/Affiliate Pulak Chowdhury et al.; UC Davis E. Bonetto et al.; Politecnico di Torino, Italy Topic Evaluation of energy efficiency of mixed-line-rate (MLR) optical networks. A comparative study of energy efficiency of MLR and singleline-rate (SLR) networks shows that MLR is more energy efficient than SLR networks. Proposes AWG based optical switching fabric architectures and demonstrates their energy efficiency over electronic backplanes and interconnects Trends Contribution s towards energy efficient Network design Energy Efficiency & Next Generation Networks Code OWY5 OWY6 Title Burst Switching for Energy Efficiency in Optical Networks Energy-Awareness in Dynamic Traffic Grooming Author/Affiliate Topic Shuping Peng et al.; Peking University, China and University of Melbourne, Australia 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. M. M. Hasan et al.; UT Dallas Energy-efficient traffic grooming scheme for promoting greener optical networks. The scheme considers a modular node architecture, reuses already active components during request allocations, and conserves total energy consumption in the network. Trends Contributions towards energy efficient Network design Migration to 100G Code NMB1 NMB2 Title 107Gb/s DPSK-3ASK Optical Transmission over SSMF Economics of 100Gb/s Transport Author/Affiliate Topic Brian T. Teipen and Michael H. Eiselt; ADVA AG Optical Networking, Germany Report on the transmission of a 107Gb/s DPSK-3ASK optical channel over 335km fiber (SSMF). DPSK-3ASK is targeted to meet the requirements of a metro network. 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. Trends 100G: Solutions and Economics Migration to 100G Code NMB3 NMB4 Title Reach-Optimized Design for ULH Mesh Networks Network Innovations Brought by Digital Coherent Receivers Author/Affiliate Topic Propose an approach that first designs each ROADM-toROADM section independently to minimize the OSNR penalty Dah-Min Hwang; in each section. Then the whole network is examined to see if AT&T Labs, NJ, adding ROADM sites to long USA sections would be beneficial for reducing the number of regenerations in all possible paths. Operational efficiency improvements of optical networks enabled by digital Takeshi coherent receivers are Hoshida et al.; discussed in view of reliability, Fujitsu Limited, agility, performance and Japan and China reduced operational complexity. Several specific technologies are briefly introduced to deliver some more insight. Trends 100G: Solutions and Economics High Speed Network Technologies Code NTuB1 NTuB2 Title High Bit-Error Tolerant Frame/Lane Alignment for 100 Gb/s MultiLane Transmission Mapping and Transport Standard for OTU4 Author/Affiliate Topic Trends Study of high bit-error tolerant frame/lane alignment for 100 Gb/s multi-lane Takuya Ohara et transmission with al.; NTT Network advanced modulation formats. Bit-error Innovation Lab. allowance/correction for Japan frame/lane alignment improves Standards the bit-error tolerance up to and BER of 10^-2 techniques for high-bitRecently revised ITU-T G.709 defines a container for rate transport 100 Gbps signals called an OTU4. This Mark Loyd paper highlights some of the Jones, Tellabs reasons the OTU4 bit rate, frame structure, and mapping scheme were chosen. High Speed Network Technologies Code NTuB3 NTuB4 Title ContinuouslyInterleaved BCH (CIBCH) FEC delivers best in class NECG for 40G and 100G metro applications Continuous Phase Modulation as an Alternative to QPSK for 100 Gb/s Optical Links Author/Affiliate Michael Scholten et al.; Vitesse Semiconductor Corp. USA Thomas F. Detwiler et al.; Georgia Institute of Technology and Verizon Inc., USA Topic Trends 40G OTU3 performance results for ContinuouslyInterleaved concatenated BCH (CI-BCH) FEC, demonstrating best-in-class performance for a 7% overhead hard-decision FEC and offers option to tradeoff coding gain for Standards reduced FEC decode latency. and Constant envelope formats techniques including CPM may reduce for high-bitthe impact of nonlinear rate transport impairments arising from intensity variations and the associated nonlinear phase noise. The advantages of CPM versus QPSK are quantified and possible deployment opportunities are identified. High Speed Network Technologies Code NTuB5 Title Transparent WDM Network with Bitrate Tunable Optical OFDM Transponders Author/Affiliate Topic Trends Axel Klekamp et al.; Alcatel Lucent Germany and Alcatel Lucent France Reach estimations for several variable-bitrate OFDM schemes are presented and discussed in the framework of a transparent EU core network scenario. 44% reduction on OE interfaces is found compared to a fixed-bitrate 40Gb/s network. Standards and techniques for high-bitrate transport Network Testing and Characterization Code NWC1 NWC2 Title In-Service Chromatic Dispersion and PassBand Shape Measurements for Light Path with Modulated ASE Source In-Service OTDR for Passive Optical Networks Author/Affiliate Topic A tunable modulated broadband source and narrow-bandwidth filter are G. Wellbrock et used to al.; Verizon and measure chromatic EXFO Electrodispersion, group-delay Optical Engg. Inc. ripple, and pass-band shape Canada of DWDM-network light paths. This new method is simple and suitable for inservice measurements. Y. Takushima and Y. C. Chung et al.; KAIST, Korea Proposes a novel in-service optical reflectometry based on the correlation detection using a pseudo-noise signal superimposed on the downstream signal. Using the proposed technique, in-service monitoring of TDM and WDM PONs is demonstrated Trends Performance Monitoring of Networks Network Testing and Characterization Code NWC3 NWC4 Title Author/Affiliate Determination of Localized Loss in Cabled Fiber Using OTDR Measurements of Relative Mode Field Diameter Demonstration of enhanced sensitivity of a commercial OTDR by employing novel J. A. Nagel and bidirectional S. L. Woodward; analysis techniques. The AT&T Labs, NJ, method is applicable to USA measurements of cabled fiber where fluctuations in local mode field diameter are due to factory variations. Optically Powered Low-Energy Demarcation Device for Monitoring FTTx Networks Topic Demonstration of an energyM. Roeger et al.; autarkic FTTx monitor. A Karlsruhe special protocol and sophistiInstitute of cated hardware reduce the Technology and electrical operating power to 0.7μW, which can be Alcatel Lucent delivered by an optical Germany supply signal of only 5μW/monitor at a separate wavelength. Trends Performance Monitoring of Networks Network Testing and Characterization Code NWC5 NWC6 Title Area-efficient 100G+ EFEC calculation with Xilinx FPGAs Intra-Channel Chromatic Dispersion Measurements with Live Neighboring Signals in a Long Haul DWDM System Author/Affiliate Topic Trends This paper presents areaoptimized implementations of Galois Field multipliers that Michael Baxter exploit the unique and Gordon programmable logic cells in Brebner; Xilinix the Xilinx FPGA, enabling a Research Labs, 100 Gb/s EFEC block USA with significantly lower footprint within an optical transport FPGA. Performance Monitoring of A novel four-tone probe Networks signal is used to measure end-to-end residual T. J. Xia et al.; chromatic JDSU Reasearch dispersion in single 50-GHz Labs, USA DWDM channels of a longhaul ROADM network while transmitting more 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