are challenging the communications network capacity more than ever before .... include optical communications, broadband network and information processing ... National Basic Research Program of China (973 Program) and Chief. Expert of ...
GUEST EDITORIAL
ULTRA-HIGH CAPACITY OPTICAL NETWORKS
JI Yuefeng
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ncreasing the capacity of optical networks has always been an important aim of academic and industrial optical communications research. Bandwidth-hungry applications are challenging the communications network capacity more than ever before, and therefore, research and development aimed at increasing network capacity has become much more urgent over the past few years. Research into ultra-high capacity networks addresses areas such as ultra-high speed transmission, network convergence, dynamic routing, and long-reach optical access networks. This Feature Topic on ultra-high capacity optical networks of China Communications has received 31 high-quality submissions from both academia and industry. The papers were assigned to peer-reviewers following a strict review process. Because of page limitations for the Feature Topic column, we eventually selected the following 8 papers based on the review results. These selected papers cover major parts of ultra-high capacity optical networks, ranging from ultra-high capacity transmission technologies in research and development, ultra-high capacity elastic all-optical networks, ultra-high capacity access networks, and ultra-high capacity switching architectures. The first four papers focus on the research and development of technologies for transmission at 100G and beyond. The first paper “Further Considerations of 100Gbit/s Wavelength Division Multiplexing System Commercial Application” presents China Unicom’s test results on 100-Gbit/s (100G) systems, their protection schemes, interfaces, and end-to-end Operation, Administration and Maintenance (OAM). The second paper “Considerations on Transport Networks Technologies Evolution” describes several exciting technology directions associated with future optical transport China Communications April 2013
Peter J. Winzer
networks, and reviews the status of 100G and its applications in China. The third paper “100G Transport Systems: Technology Bench-Mark Testing in China and Evolution to Terabit/s Interfaces” introduces 100G coherent technology that is based on Polarization-Division Multiplexed Quadrature Phase Shift Keying (PDM-QPSK), which enables a Wavelength Division Multiplexing (WDM) system to approach 10 Tb/s. This paper reviews key transponder and network management technologies of Alcatel-Lucent, as an exemplary systems vendor, and highlights some key benchmark testing results obtained by major Chinese operators. The fourth paper “Requirements and Strategy of China Mobile on 100-Gb/s Based Wavelength Division Multiplexing Systems” describes the bandwidth demands of China Mobile, and indicates that increased Optical Transport Network (OTN) capacities, low energy consumption, Photonic Integrated Circuit (PIC) technologies, low cost 100G metro networks, and on-line Optical Signal-to-Noise Ratio (OSNR) monitoring will play important roles in China Mobile’s network evolution. The fifth and the sixth papers focus on flexible optical networks. “Survivable Traffic Cognition Algorithm with Joint Failure Probability in Flexible Bandwidth Optical Networks” reports a survivable traffic cognition algorithm with joint failure probability. The simulations indicate that the proposed algorithm does not cause large average joint failure probabilities. “Polynomial-Time Adaptive Routing Algorithm Based on Spectrum Scan in Dynamic Flexible Optical Networks” describes a novel Spectrum-Scan Routing (SSR) scheme in flexible optical networks. The proposed algorithm achieves lower blocking probability and higher resource utilization, and consumes only polynomial time.
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GUEST EDITORIAL
The seventh paper “Evolutional Algorithm Based Cascade Long Reach Passive Optical Networks Planning” focuses on optical access networks. The authors present a mathematical model for ultra-high capacity long reach Passive Optical Networks (PONs), considering traffic demands, user requirements, and physical constraints. They also propose a two-stage evolutional algorithm to solve the star-like and cascade long reach PON planning problem. The eighth paper “A Novel Optical Burst Mesh Network with Optical Time Slot Interchange at Source Nodes” proposes an optical burst network architecture supporting a mesh topology. A novel Optical Time Slot Interchange (OTSI) at the source nodes is introduced to mitigate the burst contention and to increase the bandwidth utilization. We would like to express our sincere thanks and appreciations to the anonymous international pool of reviewers for their extraordinary support in the face of the very tight publication schedule. Without their contribution, this Feature Topic column would not have been possible. We also thank Ms. HU Xin from the Editorial Office of China Communications for her administrative support.
the Institute of Information Photonics and Optical Communications,
Biographies
izational tasks with the IEEE Photonics Society and the Optical Society
and the Deputy Director of the State Key Laboratory of Information Photonics and Optical Communications. His major research interests include optical communications, broadband network and information processing theories and technologies. Now He is Chief Scientist of National Basic Research Program of China (973 Program) and Chief Expert of National High Technology Research and Development Program of China (863 Program). He has more than 40 granted patents. Moreover, he published/presented more than 300 journal/conference papers and 10 books or teaching materials. He is a Fellow of Chinese Institute of Communications (CIC) and a winner of the National Science Fund for Distinguished Young Scholars of China. He also received some awards, including National Technology Invention Award, National Science and Technology Progress Award, National Teaching Achievement Award, State-class Famous Teacher, etc. Peter J. Winzer, received his Ph.D. in electrical engineering from the Vienna University of Technology, Austria in 1998. Supported by the European Space Agency, he investigated space-borne Doppler lidar and laser communications using high-sensitivity digital modulation and detection. In 2000 he joined Bell Labs, focusing on the research and development of many hardware and architectural aspects of fiber-optic networks, from 10Gb/s to 1Tb/s. He set several high-speed and high-capacity optical transmission records. He has widely published and patented. He is actively involved in technical and organof America (OSA). He was promoted Distinguished Member of Tech-
JI Yuefeng, received his Ph.D. degree from Beijing University of Posts
nical Staff at Bell Labs in 2007. Since 2010 he is heading the Optical
and Telecommunications, China. Now he is a Professor of Beijing
Transmission Systems and Networks Research Department at Bell
University of Posts and Telecommunications, the Executive Dean of
Labs. He is a Fellow of the OSA and the IEEE.
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China Communications April 2013
