Fast desynchronization for decentralized multichannel medium access control

Nikos Deligiannis, João F. C. Mota, George Smart, Yiannis Andreopoulos

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


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 time-synchronous 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-2012 time-synchronized channel hopping (TSCH) scheme.

Original languageEnglish
Article number7154451
Pages (from-to)3336-3349
Number of pages14
JournalIEEE Transactions on Communications
Issue number9
Publication statusPublished - Sept 2015


  • decentralized multichannel coordination
  • desynchronization
  • gradient methods
  • Medium access control

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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