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OPNET Technologies
7255 Woodmont Avenue
Bethesda, MD20814
Tel: 240-497-3000
Fax: 240-497-3001
E-mail: info@opnet.com
Web: http://www.opnet.com
OPNET is a registered
trademark of OPNET Technologies
© 2001 OPNET Technologies
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University: University
of Pittsburgh
Name of Sponsoring Professor: Prof. Martin B. H. Weiss
Department: Information Science and Telecommunications
Optimized Network Engineering Tools (OPNET) is a comprehensive simulation
tool. It allows the simulation of large communications networks to help us to
understand, model, and investigate the performance of advanced topics such as
communication/network architectures, communication/network protocols and applications,
and wired and wireless communication systems, etc.
The OPNET package provides attractive features to assist the simulation.
These features include graphical specification of models; process models that
allow user-defined functions, integrated data analysis tools, and a huge
library supporting well-known communication and Internet protocols and
systems.
We use the OPNET package to set tutorial and
laboratories in Mobile
Computing Courses and to conduct research in the MSA group.
Research:
Project Title: The Comparative Study of Wireless Data Service
Networks: GSM-based vs. CDMA-based
Student: Mr. Hak Ju Kim
Supervisor: Dr. Martin B. H. Weiss
Abstract:
Wireless
service providers have recognized for some years that revenue growth
prospects lie in their ability to deliver high speed packet switched data
services. These data services are the
underpinning of multimedia and interactive information systems that service
providers expect to be a cornerstone of future profits. To that end, equipment providers have been
developing a series of technologies, referred to as 3rd Generation
or 3G, to support these services. The
evolutionary paths to 3G from the principal 2G technologies, GSM and CDMA2000
are quite distinct. One calls for
substantial infrastructure replacement while the other calls for upgrades to
existing equipment.
The
main goals of this research are to provide an overview the wireless
technology options from a technical perspective and compare their migration
paths using OPNET simulation tool. In this study we blend a comparative study
and a ‘what if’ study (or contingency study) of two wireless technologies by
examining their network evolution paths alternatives. In particular, we examine the Global
Systems for Mobile Communications (GSM)-based network scenarios and the Code
Division Multiple Access (CDMA )-based network scenarios. This study can be
complex because the different technologies offer different data rates,
capacities, and frames, but the analysis is straightforward.
This
study will contribute to the strategic decision facing wireless network
service providers migrating to the next generation network architecture by
resolving the ambiguity of the nature and value of wireless technologies in
network design.
Key
Words: Network Migration, Uncertainty,
Modularity, Real Options, 3G, GSM, EDGE, CDMA, etc.
Publications:
Kim,
Hak J., “Deciding on Network Architecture for 3G Wireless Services,”
Russel Cooper and Gary Madden (Eds.), Frontiers
of Broadband, Electronic and Mobile Commerce, Contribution to Economic
Series, Physica-Verlag, Heidelberg (Forthcoming, 2003)
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Conference paper
Hak J. Kim, Network Innovations: The Migration Path of
Wireless Network Technologies and Architecture, ICTS2003, Monterey, CA, October
2-5, 2003 (Accepted)
Hak J. Kim, Revolution or Evolution:
Decision on Network Architecture for the 3G Wireless Services, ITS2003,
Perth, Western Australia, June 22-24, 2003. (Accepted)
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