Metadata Design for Reconfigurable Protocol Stacks in Systems Beyond 3G |
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Authors: | Vangelis Gazis Nancy Alonistioti Lazaros Merakos |
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Affiliation: | (1) Communication Networks Laboratory, Department of Informatics & Telecommunications, University of Athens, 157 84, Greece |
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Abstract: | Global consensus on the next generation of wireless mobile communications, broadly termed “beyond 3G”, sketches a heterogeneous
infrastructure comprising different wireless systems in a complementary manner and vested with reconfiguration capabilities,
which support a flexible and dynamic adaptation of the wireless network and its spectrum resources to meet the ever-changing
service requirements. For ubiquitous reconfiguration to become a practical capability of mobile communication systems, it
is necessary to establish a global architecture for modeling, expressing, and circulating essential metadata related to reconfiguration,
including reconfigurable device capabilities and semantic properties of protocol stacks. We outline the relevant standardization
initiatives in the mobile domain, summarize existing work in reconfiguration-supporting architectures, and identify key shortcomings
that may hinder the advent of ubiquitously reconfigurable systems. Further on, we point out some major limitations of current
metadata standards in the mobile domain for the representation of capability information pertaining to reconfigurable protocol
stacks. Next, we identify essential metadata classes in support of reconfigurable communication systems, introducing an associated
object-oriented UML model. We elaborate on the design rationale of the UML model, presenting and discussing the alternative
metadata representation standards and suitable encoding formats. Finally, we demonstrate the suitability of our UML model
by applying our reconfiguration-supporting vocabulary in the cases of a standardized protocol stack of 3G mobile devices and
stationary 3G cellular network elements.
Vangelis Gazis received his B.Sc. and M.Sc. (Communication Networking) degrees from the Department of Informatics & Telecommunications of
the University of Athens, Greece, in 1995, and 1998, respectively. He also received an M.B.A. degree from the Athens University
of Economics and Business in 2001. Since 1996 until, he has been with the research staff of the Communication Networks Laboratory
(CNL) of the University of Athens. He has participated in national and European research projects (MOBIVAS, ANWIRE) of the
IST framework programme. He specializes in reconfigurable mobile systems and networks for beyond 3G, metadata and ontology
languages, reflective and component middleware, adaptable services and open API frameworks for telecommunications. He is currently
a Ph.D. candidate in the Department of Informatics & Telecommunications of the University of Athens.
Nancy Alonistioti holds a B.Sc. degree and a Ph.D. degree in informatics and telecommunications from the University of Athens. Presently, she
is a senior researcher in the Department of Informatics and Telecommunications of the University of Athens. In the past, she
has held a research position with the Institute of Informatics and Telecommunications of NCSR “Demokritos” in the areas of
protocol and service design and testing, mobile systems (UMTS), open architectures, and software defined radio systems and
networks. Her current research interests are in reconfigurable mobile systems and networks beyond 3G, and adaptable services,
pervasive computing and context awareness. She has participated in several national and European R&D projects, and has been
the technical manager of the IST-MOBIVAS and IST-ANWIRE projects, which have had a focus on reconfigurable mobile systems,
networks an respective service provision. She is currently a member of the management team and workpackage leader in the FP6
IST-E2R project on reconfigurability; she also serves as technical manager for the University of Athens in the FP6 IST-LIAISON
project, which focuses on location based services in working environments. Dr Alonistioti is co-editor and co-author of the
book entitled “Software defined radio, Architectures, Systems and Functions”, published by John Wiley in May 2003. She has
authored over 55 publications in the area of mobile communications and reconfigurable systems and networks.
Lazaros Merakos received the Diploma in electrical and mechanical engineering from the National Technical University of Athens, Athens, Greece,
in 1978, and the M.S. and Ph.D. degrees in electrical engineering from the State University of New York, Buffalo, in 1981
and 1984, respectively. From 1983 to 1986, he was on the faculty of the Electrical Engineering and Computer Science Department,
University of Connecticut, Storrs. From 1986 to 1994, he was on the faculty of the Electrical and Computer Engineering Department,
Northeastern University, Boston, MA. During the period 1993D1994, he served as Director of the Communications and Digital
Processing Research Center, Northeastern University. During the summers of 1990 and 1991, he was a Visiting Scientist at the
IBM T. J. Watson Research Center, Yorktown Heights, NY. In 1994, he joined the faculty of the University of Athens, Athens,
Greece, where he is presently a Professor in the Department of Informatics and Telecommunications, and Director of the Communication
Networks Laboratory (UoA-CNL) and the Networks Operations and Management Center. Since 1995, he is leading the research activities
of UoA-CNL in the area of mobile communications, in the framework of the Advanced Communication Technologies and Services
(ACTS) and Information Society Technologies (IST) programs funded by the European Union (projects RAINBOW, Magic WAND, WINE,
MOBIVAS, POLOS, ANWIRE, E2R, LIAISON). His research interests are in the design and performance analysis of communication
networks, and wireless/mobile communication systems and services. He has authored more than 190 papers in the above areas.
Dr. Merakos is Chairman of the Board of the Greek Universities Network, the Greek Schools Network, and Member of the Board
of the Greek Research Network. In 1994, he received the Guanella Award for the Best Paper presented at the International Zurich
Seminar on Mobile Communications. |
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Keywords: | reconfiguration protocol stack beyond 3G mobile wireless metadata semantics RDF |
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