Colloquia, Seminars and Conference News
Title : MAC and Swarming Protocols for Underwater Networks
Date : October 21, 2009. (2:00 pm) Tea starts half an hour before each seminar
Location: ITEB 336
Speaker : Chien-Chung Shen
Abstract:
In this talk, I will describe two research topics in the context
of underwater networks.
First, I will argue that several ideas taken from medium access
control (MAC) protocols for RF networks, including exclusive
channel access, are either unnecessary in acoustic networks or
must be redefined. I will present a time-based MAC protocol
termed UW-FLASHR which does not require centralized control,
tight clock synchronization, or accurate propagation delay
estimation. I demonstrate, via simulation, that UW-FLASHR can
achieve significantly higher channel utilization than the maximum
utilization possible with existing time-based exclusive access
MAC protocols.
Second, I will describe a bio-inspired swarming algorithm to
control a swarm of autonomous underwater vehicles (AUVs). A
swarming algorithm defines a set of rules which a group of
autonomous vehicles follow to interact locally with other proximal
vehicles without any centralized control. In particular, I will
describe the covert leadership problem where a small subset of AUVs,
whose identities remain covert, in a swarm possess destination
information to guide the movement of the entire swarm. I will
demonstrate the effectiveness of the swarming algorithm via
simulations/animations.
Bio:Chien-Chung Shen (cshen@cis.udel.edu) received his B.S. and M.S.
degrees from National Chiao Tung University, Taiwan, and his Ph.D.
degree from UCLA, all in computer science. He was a research
scientist at Bellcore (now Telcordia) Applied Research working on
control and management of broadband networks. He is now an associate
professor in the Department of Computer and Information Sciences of
the University of Delaware. His research interests include ad hoc,
sensor, and underwater networks, dynamic spectrum management, control
and management of broadband networks, distributed object and
peer-to-peer computing, and simulation. He is a recipient of NSF
CAREER Award, and his research has been supported by NSF, Army
Research Lab, Navy SPAWAR, NASA, RAND, and industrial companies.
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