Energy-Aware Opportunistic Mobile Data Offloading

Speaker:        Prof. Gunnar Karlsson
                KTH Royal Institute of Technology
                Sweden

Title:          "Energy-Aware Opportunistic Mobile Data Offloading"

Date:           Friday, 4 September 2015

Time:           4:30pm - 5:30pm

Venue:          Room 2304 (via lift nos. 17/18), HKUST

Abstract:

Opportunistic networking (a.k.a. device-to-device communication) is
considered a feasible means for offloading mobile data traffic. Since
mobile nodes are battery-powered, opportunistic networks must be expected
to satisfy the user demand without greatly affecting battery lifetime. To
address this requirement, this work introduces progressive selfishness, an
adaptive and scalable energy-aware algorithm for opportunistic networks
used in the context of mobile data offloading. The paper evaluates the
performance of progressive selfishness in terms of both application
throughput and energy consumption via extensive trace-driven simulations
of realistic pedestrian behavior. We show that under full cooperation the
proposed algorithm is robust against the distributions of node density and
initial content availability. The results show that in certain scenarios
progressive selfishness achieves up to 85% energy savings during
opportunistic downloads while sacrificing less than 1% in application
throughput. Furthermore, the study demonstrates that in terms of total
energy consumption (by both cellular and opportunistic downloads) in dense
environments the performance of progressive selfishness is comparable to
downloading contents directly from a mobile network.


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Biography:

Gunnar Karlsson is professor of teletraffic systems and director of the
Laboratory for Communication Networks. He previously worked for IBM Zurich
Research Laboratory, and for the Swedish Institute of Computer Science
(SICS). His Ph.D. is from Columbia University, New York, and his M.Sc.
from Chalmers University of Technology in Gothenburg. He has been visiting
professor at EPFL, Switzerland, the Helsinki University of Technology in
Finland (now Aalto University) and  ETH Zurich, Switzerland. His research
interests are mobile communication, in particular opportunistic wireless
communication, and quality of service issues for the Internet. He is
currently interested in online teaching and the future of the university
and higher education.