Seminars & Colloquia
College of Computing, Georgia Institute of Technology
"Message Ferrying: Mobility-Assisted Data Delivery in Wireless Networks"
Friday October 14, 2005 03:30 PM
Location: 136, MRC NCSU Centennial Campus
(Visitor parking instructions)
Mobile ad hoc networks form a vital component in realizing the vision of
rapidly deployed communications capability in environments with little
or no pre-installed infrastructure. Such environments arise in critical
situations ranging from battlefield scenarios to natural and human-made
disaster events. Most ad hoc network routing and data forwarding algorithms
are designed for networks that are always connected. Node mobility, limited
radio range, physical obstacles, severe weather, wide deployment area or
other physical factors, might preclude some nodes from communicating with
others and result in a partitioned network. In this talk,
I will first describe a novel taxonomy for mobile wireless networks
which admits various ranges of disconnection and mobility.
I will then describe our work which is concerned with the development of
a ``Message Ferrying'' (MF) scheme, inspired by its real life analog,
that implements a non-traditional 'store, carry and forward' routing
paradigm using node mobility to overcome network partitioning. In the MF
scheme, a set of mobile nodes called message ferries take responsibility
for carrying messages between disconnected nodes.
I will summarize some of our research efforts in the design and
evaluation of efficient data delivery services using message ferrying
techniques. These include: 1) design of ferry routing schemes for
single and multiple interacting ferries, 2) protocols that make use
proactive node and ferry mobility, 3) use of message ferries to save
energy and 4) providing for fault tolerance in MF systems.
Mostafa Ammar is a Regents' Professor with the College of Computing at Georgia Tech. He has been with Georgia Tech since 1985. He received the S.B. and S.M. degrees from the Massachusetts Institute of Technology in 1978 and 1980, respectively and the Ph.D. in Electrical Engineering from the University of Waterloo, Ontario, Canada in 1985.
Dr. Ammar's research interests are in network architectures, protocols
and services. He has contributions in the areas of multicast communication
and services, multimedia streaming, content distribution networks, network
simulation, and wireless disruption tolerant networks.
Dr. Ammar has co-authored over 170 publications in journals and conferences. He was the co-recipient of the Best Paper Awards at the 7th WWW conference for the paper on the 'Interactive Multimedia Jukebox' and the 2002 Parallel and Distributed Simulation (PADS) conference for the paper
on 'Updateable Network Simulation'.
He served as the Editor-in-Chief of the IEEE/ACM Transactions on Networking
from 1999 to 2003.
Dr. Ammar is a Fellow of the IEEE and a Fellow of the ACM.
Host: George Rouskas, Computer Science
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