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The soundness of the evaluation model used in Wireless Sensor Networks (WSN) affects the soundness of the results. Most proposed models in the literature assume a distance based sensing and 2D freespace communication for a randomly deployed WSN scenario. However, random sensor deployment commonly takes place in 3D inaccessible terrains. In this paper, the authors investigate the incorporation of a realistic 3D terrain model into the performance evaluation of a target tracking WSN. Their observation is that the unrealistic and contradicting 2D terrain assumptions, in which communication and sensing is not blocked due to neglected topographic formations, result in optimistic and unrealistic WSN performance.
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