TAYLORS: A fasT, scAlable Yet Lightweight prOtocol for Resilient Synchronization of WSN
Résumé
As of today, wireless sensor networks (WSNs) are regularly deployed to monitor physical phenomena. This is made possible by the collection of time-stamped data building on synchronized sensor clocks. Some applications benefit from a temporary deployment of the network. This is for instance the case for acoustics calibration of a concert hall using connected microphones. In this case, the clock synchronization protocol must converge fast and in a bounded time. In this paper, we propose TAYLORS, a distributed and thus robust synchronization protocol for WSN that offers a fast bounded convergence and that keeps a stable clock even in dynamic settings. TAYLORS combines both max-consensus at initialization and average-consensus over the long term. This work provides as well a novel mathematical model to derive a worst-case bound on convergence that is leveraged to motivate the design of TAYLORS. Experimental results show that the proposed solution is simple, fast and suitable for very basic micro-controllers.
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