Connectivity of sparse Bluetooth networks

Abstract : Consider a random geometric graph defined on $n$ vertices uniformly distributed in the $d$-dimensional unit torus. Two vertices are connected if their distance is less than a "visibility radius" $r_n$. We consider {\sl Bluetooth networks} that are locally sparsified random geometric graphs. Each vertex selects $c$ of its neighbors in the random geometric graph at random and connects only to the selected points. We show that if the visibility radius is at least of the order of $n^{-(1-\delta)/d}$ for some $\delta > 0$, then a constant value of $c$ is sufficient for the graph to be connected, with high probability. It suffices to take $c \ge \sqrt{(1+\epsilon)/\delta} + K$ for any positive $\epsilon$ where $K$ is a constant depending on $d$ only. On the other hand, with $c\le \sqrt{(1-\epsilon)/\delta}$, the graph is disconnected, with high probability.
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Contributor : Nicolas Broutin <>
Submitted on : Friday, August 15, 2014 - 1:09:19 PM
Last modification on : Monday, April 1, 2019 - 5:06:16 PM

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  • HAL Id : hal-01056128, version 1
  • ARXIV : 1402.3696



Nicolas Broutin, Luc Devroye, Gábor Lugosi. Connectivity of sparse Bluetooth networks. Electronic Communications in Probability, Institute of Mathematical Statistics (IMS), 2015, 20 (48), pp.1-10. ⟨hal-01056128⟩



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