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This paper analyses the duration, energy consumption and efficiency of two groups of neighbor discovery protocols dedicated for Wireless Sensor Networks (WSN) with respect to various densities and discovery ratios. The derivation of the mathematical models regarding these parameters can be used for other WSN-oriented neighbor discovery schemes. Numerical results show that significant amounts of time and energy are consumed by the investigated protocols to achieve desirable discovery ratio that may have severe effects on the subsequent network organization, especially in dense scenarios.
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