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Yingshu Li, My T. Thai, and Weili Wu

"Wireless Sensor Networks and Applications"

10. Self-deployment of 50 mobile robots in an open space. Neighborhoods of the mobile
robot are defined by DT and PDT respectively. The robots congregate into a small area to
enhance the sensing capabilities.
In an initial deployment where the robots are aggregated within a small area,
there are too many robots within each other??™s communication range, such as the situation
in Figure 11(a). It introduces a significant computation and communication
overhead to calculate a robot??™s Delaunay neighbors locally. To avoid this undesirable
situation, each robot can adjust its own visibility of communication to reduce the
overhead. As a matter of fact, a robot need only consider the closest robots in calculating
its partial Delaunay triangulation. The simulation results for the algorithms
based on a centralized Delaunay triangulation and a partial Delaunay triangulation
with fixed communication range are shown in Figures 11(b) and (c). Figure 11(d)
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78 Jindong Tan
shows the simulation of the algorithm while the partial Delaunay triangulation is
calculated when a small number of closest neighbors are considered.


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