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Hot Packets: A systematic evaluation of the effect of temperature on low power wireless transceivers
University of Lübeck.
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computer Systems. (Communication Research)
TU Delft.
Lancaster University.
Show others and affiliations
2013 (English)In: Proc. 5th Extreme Conference on Communication, New York: ACM Press, 2013, 7-12 p.Conference paper, Published paper (Refereed)
Abstract [en]

Temperature is known to have a significant effect on the performance of radio transceivers: the higher the temperature, the lower the quality of links. Analysing this effect is particularly important in sensor networks because several applications are exposed to harsh environmental conditions. Daily or hourly changes in temperature can dramatically reduce the throughput, increase the delay, or even lead to network partitions. A few studies have quantified the impact of temperature on low-power wireless links, but only for a limited temperature range and on a single radio transceiver. Building on top of these preliminary observations, we design a low-cost experimental infrastructure to vary the onboard temperature of sensor nodes in a repeatable fashion, and we study systematically the impact of temperature on various sensornet platforms. We show that temperature affects transmitting and receiving nodes differently, and that all platforms follow a similar trend that can be captured in a simple first-order model. This work represents an initial stepping stone aimed at predicting the performance of a network considering the particular temperature profile of a given environment.

Place, publisher, year, edition, pages
New York: ACM Press, 2013. 7-12 p.
National Category
Computer Science Communication Systems
Identifiers
URN: urn:nbn:se:uu:diva-201338ISBN: 978-1-4503-2171-6 (print)OAI: oai:DiVA.org:uu-201338DiVA: diva2:626877
Conference
ExtremeCom 2013
Projects
CNDSWISENET
Available from: 2013-06-10 Created: 2013-06-10 Last updated: 2016-08-26Bibliographically approved
In thesis
1. Meteorological impact and transmission errors in outdoor wireless sensor networks
Open this publication in new window or tab >>Meteorological impact and transmission errors in outdoor wireless sensor networks
2013 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Wireless sensor networks have been deployed outdoors ever since their inception. They have been used in areas such as precision farming, tracking wildlife, and monitoring glaciers. These diverse application areas all have different requirements and constraints, shaping the way in which the sensor network communicates. Yet something they all share is the exposure to an outdoor environment, which at times can be harsh, uncontrolled and difficult to predict. Therefore, understanding the implications of an outdoor environment is an essential step towards reliable wireless sensor network operations.

In this thesis we consider aspects of how the environment influence outdoor wireless sensor networks. Specifically, we experimentally study how meteorological factors impact radio links, and find that temperature is most significant. This motivates us to further study and propose a first order model describing the impact of temperature on wireless sensor nodes. We also analyze transmission errors in an outdoor wireless sensor networks, identifying and explaining patterns in the way data gets corrupted. The findings lead to a design and evaluation of an approach for probabilistic recover of corrupt data in outdoor wireless sensor networks. Apart from the experimental findings we have conducted two different outdoor deployments for which large data sets has been collected, containing both link and meteorological measurements.

Place, publisher, year, edition, pages
Uppsala University, 2013
Series
Information technology licentiate theses: Licentiate theses from the Department of Information Technology, ISSN 1404-5117 ; 2013-007
National Category
Computer Science Communication Systems
Research subject
Computer Science with specialization in Computer Communication
Identifiers
urn:nbn:se:uu:diva-227639 (URN)
Supervisors
Projects
WISENET
Available from: 2013-12-17 Created: 2014-06-29 Last updated: 2017-08-31Bibliographically approved
2. A Node-Link Perspective on the Impact of Local Conditions in Sensor Networks
Open this publication in new window or tab >>A Node-Link Perspective on the Impact of Local Conditions in Sensor Networks
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Sensor networks are made up of small battery-powered sensing devices with wireless communication capabilities, enabling the network to monitor the environment in which it is deployed. Through their flexible and cable-free design these networks open up for new deployment scenarios that were previously not plausible such as during a natural disaster. Motivated by scenarios where centralized oversight is not possible the focus of this thesis is to equip nodes with further adaptability to changes in the links it has with other nodes. This is achieved through contributions in three areas focusing on observations from a node-link perspective.

First, the impact the local environment has on the nodes is explored by deploying a sensor network outdoors next to a meteorological station to correlate the variations in link quality to the changes in the environment. The work identifies temperature as the main factor, where through further investigations in a controlled setting, a linear relationship between the decrease in signal quality and the increase in temperature is described.

Secondly, the thesis address how nodes in a sensor network can be motivated to exchange data by modeling it as a game. The game theoretic design is motivated by the absence of any centralized control and focus on the nodes as individual users in the network. The presented design motivates the selfish nodes to participate in the exchange of sensor data, showing that it is the best strategy.

Lastly, by exploring and understanding how connections in a mobile sensor network occur, nodes are given more flexibility to determine how to send and sample sensor data. This adaptability to contact occurrences is shown to provide better ways of sending data by selecting higher quality links as well as making sampling more energy preserving by reducing the rate in the vicinity of other nodes.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2016. 57 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1398
Keyword
Sensor networks, opportunistic communication, meterlological impact, packet corruption, multi-contacts
National Category
Communication Systems
Research subject
Computer Science with specialization in Computer Communication
Identifiers
urn:nbn:se:uu:diva-300168 (URN)978-91-554-9643-2 (ISBN)
External cooperation:
Public defence
2016-09-23, P2446, Lägerhyddsvägen 2, Uppsala, 13:15 (English)
Opponent
Supervisors
Projects
CNDSWISENET
Available from: 2016-08-31 Created: 2016-08-04 Last updated: 2016-09-08

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Wennerström, HjalmarNordén, Lars-ÅkeVoigt, Thiemo

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