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Fast Desynchronization For Decentralized Multichannel Medium Access Control This publication appears in: IEEE Transactions on Communications Authors: N. Deligiannis, J. Mota, G. Smart and Y. Andreopoulos Volume: 63 Issue: 9 Pages: 3336-3349 Publication Date: Sep. 2015
Abstract: Distributed desynchronization algorithms are key to wireless sensor networks as they allow for medium access control in a decentralized manner. In this paper, we view desynchronization primitives as iterative methods that solve optimization problems. In particular, by formalizing a well established desynchronization algorithm as a gradient descent method, we establish novel upper bounds on the number of iterations required to reach convergence. Moreover, by using Nesterov’s accelerated gradient method, we propose a novel desynchronization primitive that provides for faster convergence to the steady state. Importantly, we propose a novel algorithm that leads to decentralized timesynchronous multichannel TDMA coordination by formulating this task as an optimization problem. Our simulations and experiments on a densely-connected IEEE 802.15.4-based wireless sensor network demonstrate that our scheme provides for faster convergence to the steady state, robustness to hidden nodes, higher network throughput and comparable power dissipation with respect to the recently standardized IEEE 802.15.4e time-synchronized channel hopping (TSCH) scheme.
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