Reliable sensor networks using decentralised channel selection

Abstract

In this paper, we present a fully decentralised algorithm for channel selection in wireless ad-hoc sensor networks. The objective is to generate reliable, interference-free links between first neighbours so as to ensure the emergence of a single network including the majority of all devices, in a context where spatial distribution is unpredictable. The algorithm combines random channel selection with variable signal intensity to minimise the probability of collisions at the receiver's end, yet relies exclusively on locally available information. Proof of concept is provided by Monte Carlo simulation results. We demonstrate military relevance by showing how our system could be used to retrieve information from a network of vibration-monitoring devices designed to track vehicle movement. Advantages in terms of power saving and increased sensor stealth are briefly discussed.