A Multi-Hop LoRa Linear Sensor Network for the Monitoring of Underground Environments: The Case of the Medieval Aqueducts in Siena, Italy

In this paper, a pervasive monitoring system to be deployed in underground environments is presented. The system has been specifically designed for the so-called “Bottini”, i.e., the medieval aqueducts dug beneath the Centre of Siena, Italy. The results of a measurement campaign...

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Main Authors: Andrea Abrardo, Alessandro Pozzebon
Format: Article
Language:English
Published: MDPI AG 2019-01-01
Series:Sensors
Subjects:
M2M
D2D
Online Access:http://www.mdpi.com/1424-8220/19/2/402
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spelling doaj-461b4181629043849d4d3b527e9461022020-11-24T21:50:10ZengMDPI AGSensors1424-82202019-01-0119240210.3390/s19020402s19020402A Multi-Hop LoRa Linear Sensor Network for the Monitoring of Underground Environments: The Case of the Medieval Aqueducts in Siena, ItalyAndrea Abrardo0Alessandro Pozzebon1Department of Information Engineering and Mathematical Sciences, University of Siena, 53100 Siena SI, ItalyDepartment of Information Engineering and Mathematical Sciences, University of Siena, 53100 Siena SI, ItalyIn this paper, a pervasive monitoring system to be deployed in underground environments is presented. The system has been specifically designed for the so-called “Bottini”, i.e., the medieval aqueducts dug beneath the Centre of Siena, Italy. The results of a measurement campaign carried out in the deployment scenario show that the transmission range of LoRa (Long Range) technology is limited to a maximum of 200 m, thus, making the adoption of a classical star topology impossible. Hence, a Linear Sensor Network topology is proposed based on multi-hop LoRa chain-type communications. In this scenario, an ad-hoc transmission scheme is presented that optimally evaluates the wake-up time of all nodes with the aim of minimizing the average energy dissipation deriving from clock offsets. Numerical results show that the proposed wake-up time optimization leads in the best case to a 50% reduction in power dissipation with respect to a scheme that evaluates the wake-up time in a non-optimal way.http://www.mdpi.com/1424-8220/19/2/402M2MD2DLoRamulti-hoplinear sensor networksunderground monitoring
collection DOAJ
language English
format Article
sources DOAJ
author Andrea Abrardo
Alessandro Pozzebon
spellingShingle Andrea Abrardo
Alessandro Pozzebon
A Multi-Hop LoRa Linear Sensor Network for the Monitoring of Underground Environments: The Case of the Medieval Aqueducts in Siena, Italy
Sensors
M2M
D2D
LoRa
multi-hop
linear sensor networks
underground monitoring
author_facet Andrea Abrardo
Alessandro Pozzebon
author_sort Andrea Abrardo
title A Multi-Hop LoRa Linear Sensor Network for the Monitoring of Underground Environments: The Case of the Medieval Aqueducts in Siena, Italy
title_short A Multi-Hop LoRa Linear Sensor Network for the Monitoring of Underground Environments: The Case of the Medieval Aqueducts in Siena, Italy
title_full A Multi-Hop LoRa Linear Sensor Network for the Monitoring of Underground Environments: The Case of the Medieval Aqueducts in Siena, Italy
title_fullStr A Multi-Hop LoRa Linear Sensor Network for the Monitoring of Underground Environments: The Case of the Medieval Aqueducts in Siena, Italy
title_full_unstemmed A Multi-Hop LoRa Linear Sensor Network for the Monitoring of Underground Environments: The Case of the Medieval Aqueducts in Siena, Italy
title_sort multi-hop lora linear sensor network for the monitoring of underground environments: the case of the medieval aqueducts in siena, italy
publisher MDPI AG
series Sensors
issn 1424-8220
publishDate 2019-01-01
description In this paper, a pervasive monitoring system to be deployed in underground environments is presented. The system has been specifically designed for the so-called “Bottini”, i.e., the medieval aqueducts dug beneath the Centre of Siena, Italy. The results of a measurement campaign carried out in the deployment scenario show that the transmission range of LoRa (Long Range) technology is limited to a maximum of 200 m, thus, making the adoption of a classical star topology impossible. Hence, a Linear Sensor Network topology is proposed based on multi-hop LoRa chain-type communications. In this scenario, an ad-hoc transmission scheme is presented that optimally evaluates the wake-up time of all nodes with the aim of minimizing the average energy dissipation deriving from clock offsets. Numerical results show that the proposed wake-up time optimization leads in the best case to a 50% reduction in power dissipation with respect to a scheme that evaluates the wake-up time in a non-optimal way.
topic M2M
D2D
LoRa
multi-hop
linear sensor networks
underground monitoring
url http://www.mdpi.com/1424-8220/19/2/402
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