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SERIES EDITORIAL
OPTICAL ACCESS AND TRANSPORT NETWORKS: ADVANCES IN STANDARDS AND SERVICES
Osman S. Gebizlioglu
T
Hideo Kuwahara
he global telecommunications industry entered the year 2011 with estimates of a shrinking 2010 optical communications equipment market. However, the largest global optical communications conference of its kind, OFC/NFOEC 2011, held in Los Angeles, California, during the first week of March 2011, displayed an upbeat mood for the industry with attendance that exceeded 11,000, and represented increased participation in both the technical conference and the exhibit. All segments of the industry from service providers to large systems and components suppliers, and academic and industrial R&D organizations were represented in a variety of conference venues. All market segments from long-haul and metro optical transport and access networks to optical interconnection applications were covered in conference events that included a plenary session, workshops, tutorials, technical sessions with post-deadline presentations, and special events and presentations on the exhibit floor. High-speed optical transport network (OTN) technologies were well represented with sessions and events featuring advancements in 100 GbE transport and reconfigurable optical add/drop multiplexer (ROADM) technologies. Optical access networks were addressed with a focus on passive optical network (PON) architectures, components such as transceivers, and PON testing and maintenance approaches. Among key PON architectures, a separate session was devoted to wavelength-division multiplexing (WDM)-PON implementations, while assessments on the viability of WDM-PON were mixed for near-term market opportunities. In parallel with broad coverage of PON technologies, IEEE Communications Magazine had a special supplement on passive optical networks in its February 2011 issue, which was made available to all conference attendees as part of their conference material package. One item in particular that contributed to the upbeat and almost triumphant mood of OFC/NFOEC ’11 was the success of the collaborative effort among service providers, network equipment vendors, and components suppliers in developing standards for 100 Gb/s transport. Several
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Vijay Jain
John Spencer
speakers noted the success and timing of the standards and implementation agreements in IEEE 802.3, International Telecommunication Union — Telecommunication Standardization Sector (ITU-T) Study Group 15, and the Optical Internetworking Forum (OIF). This patient and purposeful effort contrasted with some of the difficulties in the efforts to bring 40 Gb/s transmission in networks. Much work lies ahead in migrating to even greater transmission rates (400 Gb/s and 1 Tb/s) as well as implementing 100 Gb/s functionality in mesh networks using ROADMs. This success in collaborative efforts by so many standards bodies and companies with different positions in the optical ecosystem should bode well for meeting the ever increasing need for bandwidth in the network. As OFCNFOEC ’11 came to a close on Thursday, March 10, the entire world was shocked and shaken by the news of a historic earthquake followed by a tsunami of unimaginable power and destruction in northeastern Japan. Nuclear power plant Fukushima Daiichi, damaged by the earthquake, continues to threaten its surroundings with a potential meltdown. Optical communications networks in the region sustained significant damage in both terrestrial and international submarine segments. Fortunately, however, the essential communications services were quickly restored via rerouting management to maintain the much needed communications infrastructure in the region. As reported in our 2010 Optical Communications Series editorials, despite the global economy’s slow recovery, we continue to receive news/announcements of service provider and supplier initiatives addressing the brisk pace of global demand growth for Internet, video, TV, and telecommunications services for medium and large enterprises. Moreover, national and local governments continue to promote programs and policies for broader availability of broadband communications services for which optical communications hold the greatest promise as the key set of enabling technologies. In this issue, we have selected two contributions that
IEEE Communications Magazine • May 2011
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SERIES EDITORIAL address optical network services for multidomain applications and approaches that help with power usage and cost reduction in the operation of global optical networks. Yan Wang, Yaohui Jin, Wei Guo, Weiqiang Sun, and Weisheng Hu propose optical network virtualization to alleviate bottlenecks in joint scheduling of network and computing resources that have been statically handled in carrier networks with largely dynamic background traffic. They discuss the benefits and challenges in the implementation of a virtualized optical network (VON) in resource scheduling. Moreover, a VON service composition framework is proposed for grid applications, and its feasibility is demonstrated via a combined simulation and field trial in an optical network testbed. In the second contribution, June-Koo Kevin Rhee, Chan-Kyun Lee, JungYul Choi, Ji-Hwan Kim, and YongHyub Won present a power and cost effectiveness study of all-optical and electrical technologies in high-speed networks. The power consumption of a network becomes a critical performance metric for a petabit-per-second-scale Internet, in addition to the system cost. Their investigation is aimed at understanding the design principles for petabitscale hybrid optical switch nodes for optical packet and burst switching (OPS/OBS). The analysis shows the utility of long packets switched by passive-medium photonic switches in a hybrid design to reduce power consumption and total system cost. Furthermore, shared electronic memory buffers are shown to be more effective and efficient than optical fiber delay line buffers in commercially operated optical crossconnect systems with packet loss rates down to 10–6.
BIOGRAPHIES OSMAN S. GEBIZLIOGLU [M] (
[email protected]) joined Huawei Technologies USA as a principal consultant for optical distribution network (ODN) technology research in February 2011. From 1987 when he joined Bellcore until his departure from Telcordia Technologies at the end of January 2011, he was involved with the development of performance and reliability assurance requirements for optical communications components. In addition to his work to support the implementation of optical communications technologies in major service provider networks, he has been involved in failure analysis and reliability assurance efforts on aerospace and defense communications networks. He holds B.Sc. and M.Sc. degrees in chemical engineering (Middle East Technical University, Ankara, Turkey), and a Ph.D. in chemical engineering and polymer materials science and engineering (Princeton University, New Jersey). Before joining Bellcore in 1987, he held Monsanto and ExxonMobil postdoctoral fellowships and research scientist appointments in mechanical engineering (Mechanics of Materials Division), chemical engineering (Microstructural Engineering Division), and at the Center for Materials Science & Engineering at Massachusetts Institute of Technology, Cambridge. He has been an active member of the American Chemical Society, American Institute of Physics Society of Rheology, Materials Research Society, SPIE — International Society for Optical Engineering,
IEEE Communications Magazine • May 2011
Optical Society of America (OSA), and IEEE Communications Society. He has extensively published in various professional society journals, presented his work at international conferences, and delivered invited talks at conferences and university colloquia. He holds five U.S. patents and chaired the Telecommunications Industry Association TR-42.13 Subcommittee on Passive Optical Devices and Fiber Optic Metrology. He serves as Editor of the IEEE Communications Magazine Optical Communications Series. HIDEO KUWAHARA [F] (
[email protected]) joined Fujitsu in 1974, and has been engaged for more than 30 years in R&D of optical communications technologies, including high-speed TDM systems, coherent optical transmission systems, EDFA, terrestrial and submarine WDM systems, and related optical components. His current responsibility is to lead photonics technology as a Fellow of Fujitsu Laboratories Ltd. in Japan. He stayed in the United States from 2000 to 2003 as a senior vice president at Fujitsu Network Communications, Inc., and Fujitsu Laboratories of America, Richardson, Texas. He belongs to LEOS and ComSoc. He is a co-Series Editor of IEEE Communications Magazine’s Optical Communications Series. He is currently a member of the International Advisory Committee of the European Conference on Optical Communications, and chairs the Steering Committee of CLEO Pacific Rim. He is a Fellow of the Institute of Electronics, Information and Communications Engineers (IEICE) of Japan. He has co-chaired several conferences, including Optoelectronics and Communications Conference (OECC) 2007. He received an Achievement Award from IEICE of Japan in 1998 for the experimental realization of optical terabit transmission. He received the Sakurai Memorial Award from the Optoelectronic Industry and Technology Development Association of Japan in 1990 for research on coherent optical communication. VIJAY JAIN (
[email protected]) is general manager for Access Network Planning and Economics, India and South Asia at Bharti Airtel Limited, India. Prior to joining Airtel, he was program manager for FTTP and CO active and passive fiber optic components at Verizon, where he served as technical leader for risk analysis of FOC and CO components deployment into Verizon's network. He was involved in product identification, procurement, network planning, and field remediation. He has over 15 years of experience in the telecom industry and has worked in three countries (India, the United States, and Canada). Prior to Verizon, he worked as vice president and in management positions for telecom equipment manufacturer and test laboratories, which provided him 360-degree exposure to the overall telecom business and technologies. In the last 15 years he has worked in engineering, R&D, planning, strategic, and business development roles. Achievements include designing and testing of a GSM/CDMA-based wireless antenna, DSP-based VLSI chips, NMS for optical and wireless technologies, fiber optic components, and transport systems with up to OC-768 transmission rates. He holds two Master's degrees in telecom engineering, specializing in wireless technology from the Indian Institute of Technology, India, and in DSP technology from Concordia University, Canada. JOHN SPENCER [SM] (
[email protected]) is a telecom industry veteran with over 37 years of experience. He worked 29 years with BellSouth, 14 of those years as a member of technical staff in the Science & Technology Department. During that time he was involved in the introduction of SONET and Erbium doped fiber amplifiers (EDFAs), and had a team lead role in the introduction of DWDM technology in the BellSouth network. He worked four years as regional director, Product Marketing Engineering for Mahi Networks, Petaluma, California. He is currently a business and technology strategist for Optelian Access Networks, where he manages industry and customer direction to Optelian’s product line as well as a key role in Optelian’s AT&T account management. He was Conference Co-Chair for NFOEC in 1991 and 1998. He has served on the NFOEC Technical Program Committee for 10 years. He served as Secretary and Chairman of ANSI accredited committee T1X1, Digital Hierarchy and Synchronization, which developed the standards for SONET. He is a graduate of Georgia Institute of Technology (B.E.E.) and is a registered Professional Engineer (PE) in the State of Alabama. He currently serves on the NFOEC/OFC Technical Program Committee.
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