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Robustness in low power wide area networks
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Computer Systems. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computer Architecture and Computer Communication. (Communication Research)ORCID iD: 0000-0001-6581-314X
2018 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

During the past few years we have witnessed an emergence of Wide Area Networks in the Internet of Things area. There are several new technologies like LoRa, Wi-SUN, Sigfox, that offer long range communication and low power for low-bitrate applications. These new technologies enable new application scenarios, such as smart cities, smart agriculture, and many more. However, when these networks co-exist in the same frequency band, they may cause problems to each other since they are heterogeneous and independent. Therefore it is very likely to have frame collisions between the different networks.

In this thesis we first explore how tolerant these networks are to Cross Technology Interference (CTI). CTI can be described as the interference from heterogeneous wireless technologies that share the same frequency band and is able to affect the robustness and reliability of the network. In particular, we select two of them, LoRa and Wi-SUN and carry out a series of experiments with real hardware using several configurations. In this way, we quantify the tolerance of cross technology interference of each network against the other as well as which configuration settings are important.

The next thing we explored is how well channel sensing mechanisms can detect the other network technologies and how they can be improved. For exploring these aspects, we used the default Clear Channel Assessment (CCA) mechanism of Wi-SUN against LoRa interference and we evaluated how accurate it is. We also improved this mechanism in order to have higher accuracy detection against LoRa interference.

Finally, we propose an architecture for WSNs which will enable flexible reconfiguration of the nodes. The idea is based on Software Defined Network (SDN) principles and could help on our case by reconfiguring a node in order to mitigate the cross-technology interference from other networks.

Place, publisher, year, edition, pages
Uppsala University, 2018.
Series
Information technology licentiate theses: Licentiate theses from the Department of Information Technology, ISSN 1404-5117 ; 2018-004
National Category
Communication Systems Computer Systems
Research subject
Computer Science with specialization in Computer Communication
Identifiers
URN: urn:nbn:se:uu:diva-351481OAI: oai:DiVA.org:uu-351481DiVA, id: diva2:1210159
Opponent
Supervisors
Available from: 2018-05-28 Created: 2018-05-25 Last updated: 2018-05-31Bibliographically approved
List of papers
1. Investigating interference between LoRa and IEEE 802.15.4g networks
Open this publication in new window or tab >>Investigating interference between LoRa and IEEE 802.15.4g networks
2017 (English)In: Proc. 13th International Conference on Wireless and Mobile Computing, Networking and Communications, IEEE, 2017, p. 441-448Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
IEEE, 2017
National Category
Communication Systems
Identifiers
urn:nbn:se:uu:diva-331851 (URN)10.1109/WiMOB.2017.8115772 (DOI)000419818000061 ()978-1-5386-3839-2 (ISBN)
Conference
WiMob 2017, October 9–11, Rome, Italy
Available from: 2017-11-23 Created: 2017-10-18 Last updated: 2018-05-31Bibliographically approved
2. Improving LoRa/IEEE 802.15.4g co-existence
Open this publication in new window or tab >>Improving LoRa/IEEE 802.15.4g co-existence
(English)Manuscript (preprint) (Other academic)
National Category
Communication Systems
Identifiers
urn:nbn:se:uu:diva-351504 (URN)
Available from: 2018-05-28 Created: 2018-05-28 Last updated: 2018-05-31
3. Using software-defined networking principles for wireless sensor networks
Open this publication in new window or tab >>Using software-defined networking principles for wireless sensor networks
2015 (English)In: Proc. 11th Swedish National Computer Networking Workshop, 2015Conference paper, Published paper (Refereed)
National Category
Computer Systems
Identifiers
urn:nbn:se:uu:diva-254172 (URN)
Conference
SNCNW 2015, May 28–29, Karlstad, Sweden
Projects
ProFuN
Funder
Swedish Foundation for Strategic Research , RIT08-0065
Available from: 2015-06-05 Created: 2015-06-05 Last updated: 2018-05-31Bibliographically approved

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Orfanidis, Charalampos

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