Radiation awareness in three-dimensional wireless sensor networks

With Prof. Sotiris Nikoletseas, Patras University, Greece

Abstract:

This research attempts a first step towards investigating the aspect of radiation awareness in environments with abundant heterogeneous wireless networking. We call radiation at a point of a 3D wireless network the total amount of electromagnetic quantity the point is exposed to; our definition incorporates the effect of topology as well as the time domain, data traffic and environment aspects. Even if the impact of radiation to human health remains largely unexplored and controversial, we believe it is worth trying to understand and control. We first analyze radiation in well known topologies (random and grids); randomness is meant to capture not only node placement but also uncertainty of the wireless propagation model. This first understanding of how radiation adds (over space and time) can be useful in network design, to reduce health risks. We then focus on the minimum radiation path problem of finding the lowest radiation trajectory of a person moving from a source to a destination point of the network region. We propose three heuristics which provide low radiation paths while keeping path length low; one heuristic gets in fact quite close to the offline solution by a linear program we solve. Finally, we investigate the interesting impact on the heuristics' performance of diverse node mobility.

Short Bio:

Sotiris Nikoletseas is currently a Faculty Member at the Computer Engineering and Informatics Department of Patras University, Greece. Also, the Director of the SensorsLab and a Scientific Consultant of the Algorithms Group at the Research Academic Computer Technology Institute, Greece. He has been a Visiting Professor at the Universities of Geneva, Ottawa and Southern California (USC).

His research interests include algorithmic aspects of wireless sensor networks and ad-hoc mobile computing, fundamental aspects of modern networking (focus on efficiency and reliability), probabilistic techniques and random graphs, average case analysis and probabilistic algorithms, computational complexity and approximation algorithms, algorithmic engineering and large scale simulation.

He has coauthored over 150 publications in international Journals and refereed Conferences, 18 Invited Chapters in Books by major publishers and two Books, one on the Probabilistic Method and another one on theoretical aspects of sensor networks (Springer Verlag). He has served as the Program Committee Chair of several Conferences (including ALGOSENSORS 2011, MOBIWAC 2011, SEA 2005, MSWiM 2007 and DCOSS 2008), and as Associate Editor, Editor of Special Issues and Member of the Editorial Board of major Journals (like TCS, IEEE TC, COMNET). He has co-initiated international events related to sensor networks (ALGOSENSORS, DCOSS) and has organized several conferences in Greece (WEA 05, IPDPS 06, MSWiM 07, DCOSS 08). He has delivered several invited talks and tutorials.

He has participated/coordinated several externally funded RD Projects related to fundamental aspects of modern networks, mainly by the European Union (EU) Future and Emerging Technologies (FET) and Future Internet Research and Experimenatation (FIRE) Actions of the Information and Communications Technology (ICT) Programme.

Date: Tuesday June 5th, 2012, 4:15pm

Location: Battelle bât A, room 432 (3rd floor)

29 mai 2012

À la Une