Building Ethernet/IP Service Awareness into NG Optical Transport Networks
Speaker: Dr. Enrique Hernandez-Valencia, Lucent Technologies
Abstract: Ethernetís introduction as a transport-network access technology has enabled new revenue generating services such as Business Ethernet Services and Residential Broadcast Video. At the same time, mobile service providers have been collapsing and simplifying their backhaul network architectures in support of higher-rate wireless data services. To help increase revenue and drive greater profitability over the network assets already invested on, service providers need to improve their ability to manage the interaction between the IP-layer functionality of packet networks and that of the optical transport layer. The increased multi-service nature of converged networks requires wide-ranging efficiency-for handling voice and data, wideband and broadband, electrical and optical interfaces. Additionally, an enduring network infrastructure must offer affordable evolution despite unpredictable demand growth.
Although a packet centric network infrastructure may seem a practical means to achieve this goal, traditional Ethernet/IP packet networks are not yet as robust in availability, reliability, pro-active and active maintenance, scalability and transparency. Another option has been to extend the optical transport network architecture into a new direction, with optimized transport capabilities for both circuit transport and data traffic growth. Packet aware ADMs have used this approach, combining SONET/SDH technologies such as GFP, VCAT, and LCAS for optimal utilization of circuit-oriented channels for data applications. New carrier class packet switching technologies based on Ethernet/MPLS offer the desired means to achieve highly scalable and reliable packet transport services. Next-generation reconfigurable wavelength selective switching combined with OTN/GMPLS control plane mechanisms can address the needs of dynamic access to bandwidth constrained metro and regional networks. The converged platform provides an efficient and data-aware transport solution that seamlessly integrates with existing networks.
This presentation will provide insight into service management within next generation optical networks. It will explain how networks are evolving from relatively static point-to-point connections to dynamic Optical Networks capable of self-management for optimization of network resources and drastically improved service provisioning intervals. It will also address the interaction of the transport network with the service control layer in the allocation of transport resources in support of blended services in both IMS and non-IMS service domains.
Bio: As a consulting member of Lucent Technologies' Multimedia Network Solutions group and a Bell Labs Fellow, Dr. Enrique Hernandez-Valencia focuses on technology developments regarding converged optical/packet transport systems, including work on network architectures, communications protocols, and system engineering. Dr. Hernandez-Valencia has more than 15 years of experience in the design and development of high-speed communications systems and services. Areas of research specialization include switching/transport system architectures, optical/packet transport integration, LAN/MAN/WAN networking architectures, and data networking services.
Dr. Hernandez-Valencia holds a Bachelor of Science degree in Electrical Engineering from the Universidad Simon Bolivar in Caracas, Venezuela, as well as Master of Science and Doctor of Philosophy degree in Electrical Engineering from the California Institute of Technology. He is a member of the Institute of Electrical and Electronics Engineers, the Association for Computing Machinery, and the Sigma Xi societies.
Interactions Between the Physical Layer and Upper Layers in Wireless Networks: The Devil is in the Details
Speaker: Prof. Fouad A. Tobagi, Stanford University
Abstract:The physical layer in wireless networks has characteristics that profoundly influence the operation of a network and the resulting performance. Interactions between the physical layer and higher layers are complex and intricate, and cannot be understood without taking the details of operation at all layers into account. Furthermore, these interactions often lead to unexpected and undesirable effects. Is it possible to understand these interactions and to control their effects? Does it matter?
Bio: Fouad A. Tobagi is Professor of Electrical Engineering and Computer Science at Stanford University.He teaches several courses in networking including Multimedia Communication over the Internet and Wireless Local Area Networks. His current research interests comprise wireless networks, multimedia communication (video streaming, voice over IP), mobile networking, differentiated services and Quality of Service, and performance evaluation of network systems.
Prior to joining the faculty of the school of Engineering at Stanford University in 1978, Dr. Tobagi was a Research Staff Project Manager with the ARPA project at the Computer Science Department, University of California, Los Angeles, and engaged in research in Packet Radio Networks, including protocol design, and analysis and measurements of packet radio networks. In 1991, he co-founded Starlight Networks, Inc., a venture concerned with multimedia networking and particularly video streaming, and served as Chief Technical Officer until August 1998. Dr. Tobagi has published extensively in the field of computer communications networks, covering packet radio and local area networks, fast packet switching, and multimedia networking. Among other accomplishments, he coauthored the first papers on Carrier Sense Multiple Access (CSMA) widely used in Ethernet and 802.11 wireless LANs, and provided an in-depth and comprehensive analysis thereof. He also has made significant contributions in multimedia communication (voice, video and data) over the Internet and wireless networks.
Dr. Tobagi was elected Fellow of the IEEE in 1985 for his contributions in computer communications and local area networks. He was also the winner of the 1981 Leonard G. Abraham Prize Paper Award in the field of Communications Systems for his paper "Multi-access Protocols in Packet Communications Networks" and co-winner of the IEEE Communications Society 1984 Magazine Prize Paper Award for the paper "Packet Radio and Satellite Networks". He was also the co-winner of the 1998 Kuwait Prize in Information Sciences, administered by the Kuwait Foundation for the Advancement of Sciences. Dr. Tobagi is a member of the Association for Computing Machinery and has served as an ACM national Lecturer for the period 1982-1983.
Dr. Tobagi has served as Associate Editor for Computer Communications for the IEEE Transactions on Communications (984-1986). He also has served as guest editor for the special issue on Local Area Networks of the IEEE Journal on Selected Areas in Communications (November 1983), the special issue on Packet Radio Networks of the Proceedings of the IEEE (January 1987), and the special issue on Large Scale ATM Switching Systems for B-ISDN of the IEEE Journal on Selected Areas in Communications (October 1991).
Fouad A. Tobagi received the Engineering Degree from Ecole Centrale des Arts et Manufactures, Paris, France, in 1970 and the M.S. and Ph.D. degrees in Computer Science from the University of California, Los Angeles, in 1971 and 1974, respectively.