High-Precision Low-Power Wireless Nodes' Synchronization via Decentralized Control
(2016) In IEEE Transactions on Control Systems Technology 24(4). p.1279-1293- Abstract
Time synchronization is crucial for wireless sensor networks (WSNs), where operations often rely on time ordering of events. WSNs are deployed in different scenarios, and therefore their timing requirements are often related to the peculiar characteristics of the specific environment they have to act in. Synchronization is anyway always an issue: transactional applications need monotonicity of the nodes' clocks to avoid time reversal, ultralow power applications call for minimal overhead to allow for low-duty-cycle operation, applications facing extreme environments have to maintain the needed precision in the presence of unforeseen thermal drift, and so on. Specially, control applications on battery-powered devices, where timing is an... (More)
Time synchronization is crucial for wireless sensor networks (WSNs), where operations often rely on time ordering of events. WSNs are deployed in different scenarios, and therefore their timing requirements are often related to the peculiar characteristics of the specific environment they have to act in. Synchronization is anyway always an issue: transactional applications need monotonicity of the nodes' clocks to avoid time reversal, ultralow power applications call for minimal overhead to allow for low-duty-cycle operation, applications facing extreme environments have to maintain the needed precision in the presence of unforeseen thermal drift, and so on. Specially, control applications on battery-powered devices, where timing is an issue and low-power operation is highly desired, benefit from synchronization. However, to date, the problem of synchronization has been differently faced depending on the application domain. This paper proposes a general solution to the problem of synchronization in WSNs, which seamlessly integrates with the radio stack. In addition, it guarantees monotonic and continuous node clocks with low overhead for the infrastructure. The solution is based on a decentralized control scheme that is stable and robust to thermal stress, without the need for temperature measurements. The control scheme is simulated and implemented on real WSN nodes. The efficiency of the scheme is evaluated with simulations and experiments, providing insights on the maximum synchronization error between nodes, on the communication overhead, and on the limited nodes' power consumption. The solution is also compared with state-of-the-art alternatives.
(Less)
- author
- Leva, Alberto ; Terraneo, Federico ; Rinaldi, Luigi ; Papadopoulos, Alessandro Vittorio LU and Maggio, Martina LU
- organization
- publishing date
- 2016-07-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Decentralized control, linear control, low-power operation, time synchronization, wireless sensor networks (WSNs)
- in
- IEEE Transactions on Control Systems Technology
- volume
- 24
- issue
- 4
- article number
- 7312449
- pages
- 15 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- wos:000378264600011
- scopus:84946091803
- ISSN
- 1063-6536
- DOI
- 10.1109/TCST.2015.2483559
- language
- English
- LU publication?
- yes
- id
- 49d50433-5620-4e74-b06d-64d689993c1d
- date added to LUP
- 2017-01-23 14:41:18
- date last changed
- 2024-02-19 15:38:28
@article{49d50433-5620-4e74-b06d-64d689993c1d,
abstract = {{<p>Time synchronization is crucial for wireless sensor networks (WSNs), where operations often rely on time ordering of events. WSNs are deployed in different scenarios, and therefore their timing requirements are often related to the peculiar characteristics of the specific environment they have to act in. Synchronization is anyway always an issue: transactional applications need monotonicity of the nodes' clocks to avoid time reversal, ultralow power applications call for minimal overhead to allow for low-duty-cycle operation, applications facing extreme environments have to maintain the needed precision in the presence of unforeseen thermal drift, and so on. Specially, control applications on battery-powered devices, where timing is an issue and low-power operation is highly desired, benefit from synchronization. However, to date, the problem of synchronization has been differently faced depending on the application domain. This paper proposes a general solution to the problem of synchronization in WSNs, which seamlessly integrates with the radio stack. In addition, it guarantees monotonic and continuous node clocks with low overhead for the infrastructure. The solution is based on a decentralized control scheme that is stable and robust to thermal stress, without the need for temperature measurements. The control scheme is simulated and implemented on real WSN nodes. The efficiency of the scheme is evaluated with simulations and experiments, providing insights on the maximum synchronization error between nodes, on the communication overhead, and on the limited nodes' power consumption. The solution is also compared with state-of-the-art alternatives.</p>}},
author = {{Leva, Alberto and Terraneo, Federico and Rinaldi, Luigi and Papadopoulos, Alessandro Vittorio and Maggio, Martina}},
issn = {{1063-6536}},
keywords = {{Decentralized control; linear control; low-power operation; time synchronization; wireless sensor networks (WSNs)}},
language = {{eng}},
month = {{07}},
number = {{4}},
pages = {{1279--1293}},
publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
series = {{IEEE Transactions on Control Systems Technology}},
title = {{High-Precision Low-Power Wireless Nodes' Synchronization via Decentralized Control}},
url = {{http://dx.doi.org/10.1109/TCST.2015.2483559}},
doi = {{10.1109/TCST.2015.2483559}},
volume = {{24}},
year = {{2016}},
}