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Worst & Best-Case Coverage in Sensors Networks DEC 2004. Seapahn Megerian Ph.D. UCLA. Miodrag Potkonjak Ph.D. Berkley. Mani B. Srivastava Ph.D. Berkley. Farinaz Koushanfar Grad @ Berkley. Presented by: Eugene Khokhlov Eugene@ApplicaSoft.com (847) 4591535.
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Worst & Best-Case Coverage in Sensors Networks DEC 2004 Seapahn Megerian Ph.D. UCLA Miodrag Potkonjak Ph.D. Berkley Mani B. Srivastava Ph.D. Berkley Farinaz Koushanfar Grad @ Berkley Presented by: Eugene Khokhlov Eugene@ApplicaSoft.com (847) 4591535
Coverage in Sensor Networks Voronoi diagrams & Maximal Breach Path Delaunay triangulation & Maximal Support Path Coverage Improvement Quick Overview Eugene, Worst & Best-Case Coverage in S.N.
Definitions • Coverage – an area in which seismic or acoustic sensors can detect an activity • Worst-case (Breach)– The closest distance to sensors on a path. • Best-Case – The maximum distance between the sensors on the path of closest sensors Eugene, Worst & Best-Case Coverage in S.N.
Voronoi Diagram Set of polygons such that all points inside a polygon are closest to only one site Edges that are equidistant from neighboring sites Eugene, Worst & Best-Case Coverage in S.N.
Delaunay triangulation • Connecting the sites in the Voronoi diagram whose polygons share a common edge. Eugene, Worst & Best-Case Coverage in S.N.
Worst Case (Breach) Worst Case (Breach) Eugene, Worst & Best-Case Coverage in S.N.
Best Case, Path Choosing the CLOSEST Eugene, Worst & Best-Case Coverage in S.N.
Comparison Worst Case => Breach Weight The closest distance to sensors on the path of travel. Best Case => Support Weight The maximum distance from the closest sensors on the Path of travel Eugene, Worst & Best-Case Coverage in S.N.
Add 1 sensor to 100 and get 10% improvement in coverage Coverage Improvement Eugene, Worst & Best-Case Coverage in S.N.
Conclusion • Voronoy diagram & breach path (Worst-Case) • Delaunay triangulation & Support Path (Best-Case) • Coverage improvement • Questions? Email to: Eugene@ApplicaSoft.com Eugene, Worst & Best-Case Coverage in S.N.