You are required to read and agree to the below before accessing a full-text version of an article in the IDE article repository.

The full-text document you are about to access is subject to national and international copyright laws. In most cases (but not necessarily all) the consequence is that personal use is allowed given that the copyright owner is duly acknowledged and respected. All other use (typically) require an explicit permission (often in writing) by the copyright owner.

For the reports in this repository we specifically note that

  • the use of articles under IEEE copyright is governed by the IEEE copyright policy (available at http://www.ieee.org/web/publications/rights/copyrightpolicy.html)
  • the use of articles under ACM copyright is governed by the ACM copyright policy (available at http://www.acm.org/pubs/copyright_policy/)
  • technical reports and other articles issued by M‰lardalen University is free for personal use. For other use, the explicit consent of the authors is required
  • in other cases, please contact the copyright owner for detailed information

By accepting I agree to acknowledge and respect the rights of the copyright owner of the document I am about to access.

If you are in doubt, feel free to contact webmaster@ide.mdh.se

FLOPSYNC-QACS: quantization-aware clock synchronization for wireless sensor networks

Authors:

Federico Terraneo , Alessandro Papadopoulos, Alberto Leva , Maria Prandini

Publication Type:

Journal article

Venue:

ACM SIGBED Review - Special Issue on 4th International Workshop on Real-time Computing and Distributed Systems in Emergent Applications (REACTION 16)

Publisher:

ACM

DOI:

10.1145/3177803.3177809


Abstract

The development of distributed real-time systems often relies on clock synchronization. However, achieving precise synchronization in the field of Wireless Sensor Networks (WSNs) is hampered by competing design challenges, such as energy consumption and cost constraints, e.g., in Internet of Things applications. For these reasons many WSN hardware platforms rely on a low frequency clock crystal to provide the local timebase. Although this solution is inexpensive and allows for a remarkably low energy consumption, it limits the resolution at which time can be measured. The FLOPSYNC synchronization scheme provides low-energy synchronization that takes into account the quartz crystal imperfections. The main limitation of the approach are the effects of quantization.In this paper we propose a clock synchronization scheme that explicitly takes into account quantization effects caused by low frequency clock crystal, thus addressing the clock synchronization issue in cost-sensitive WSN node platforms. The solution adopts switched control for minimizing the effect of quantization, with minimal overhead. We provide experimental evidence that the approach manages to reach a synchronization error of at most 1 clock tick in a real WSN.

Bibtex

@article{Terraneo5020,
author = {Federico Terraneo and Alessandro Papadopoulos and Alberto Leva and Maria Prandini},
title = {FLOPSYNC-QACS: quantization-aware clock synchronization for wireless sensor networks},
volume = {14},
number = {4},
pages = {33--38},
month = {January},
year = {2018},
journal = {ACM SIGBED Review - Special Issue on 4th International Workshop on Real-time Computing and Distributed Systems in Emergent Applications (REACTION 16)},
publisher = {ACM},
url = {http://www.es.mdu.se/publications/5020-}
}