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Orfanidis, CharalamposORCID iD iconorcid.org/0000-0001-6581-314X
Publications (9 of 9) Show all publications
Orfanidis, C., Feeney, L. M., Jacobsson, M. & Gunningberg, P. (2019). Cross-technology Clear Channel Assessment for Low-Power Wide Area Networks. In: Proceedings of The 16th IEEE International Conference on Mobile Ad-Hoc and Smart Systems: . Paper presented at The 16th IEEE International Conference on Mobile Ad-Hoc and Smart Systems.
Open this publication in new window or tab >>Cross-technology Clear Channel Assessment for Low-Power Wide Area Networks
2019 (English)In: Proceedings of The 16th IEEE International Conference on Mobile Ad-Hoc and Smart Systems, 2019Conference paper, Published paper (Refereed)
Abstract [en]

Due to their popularity, large coverage areas, and diversity of radio technologies, Low Power Wide Area Networks( LPWAN) will experience high levels of cross-technology interfer-ence. In this work, we  investigate the impact of LoRa interferenceon IEEE 802.15.4 (Wi-SUN) networks. Using hardware experiments, we characterize the interaction between these two verydifferent radio technologies. In particular, we observe that the IEEE 802.15.4 Clear Channel Assessment (CCA) mechanism does not  reliably detect interfering LoRa transmissions. We therefore propose an enhanced CCA mechanism based on a Multi-Layer Perceptron classifier and show that it significantly reduces the number of unsuccessful transmissions, while remaining compatible with the IEEE 802.15.4 standard.

National Category
Communication Systems
Identifiers
urn:nbn:se:uu:diva-397917 (URN)
Conference
The 16th IEEE International Conference on Mobile Ad-Hoc and Smart Systems
Available from: 2019-11-28 Created: 2019-11-28 Last updated: 2019-12-06
Feeney, L. M., Orfanidis, C., Jacobsson, M. & Gunningberg, P. (2018). Preliminary Results on LoRaWAN and IEEE 802.15.4-SUN Interference. In: SenSys '18: Proceedings of the 16th ACM Conference on Embedded Networked Sensor. Paper presented at 16th Conference on Embedded Networked Sensor Systems (SENSYS),Shenzhen, China, November 04-07, 2018. (pp. 430-431). New York: ACM Press
Open this publication in new window or tab >>Preliminary Results on LoRaWAN and IEEE 802.15.4-SUN Interference
2018 (English)In: SenSys '18: Proceedings of the 16th ACM Conference on Embedded Networked Sensor, New York: ACM Press, 2018, p. 430-431Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

We present some preliminary results on LoRaWAN and IEEE 802.15.4-SUN interference in urban environments. The results are based on a simple simulation that is parameterized using PHY layer measurements of controlled interference scenarios.

Place, publisher, year, edition, pages
New York: ACM Press, 2018
National Category
Communication Systems
Identifiers
urn:nbn:se:uu:diva-368660 (URN)10.1145/3274783.3275218 (DOI)000469016400086 ()978-1-4503-5952-8 (ISBN)
Conference
16th Conference on Embedded Networked Sensor Systems (SENSYS),Shenzhen, China, November 04-07, 2018.
Available from: 2018-12-06 Created: 2018-12-06 Last updated: 2019-06-24Bibliographically approved
Orfanidis, C. (2018). Robustness in low power wide area networks. (Licentiate dissertation). Uppsala University
Open this publication in new window or tab >>Robustness in low power wide area networks
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:nbn:se:uu:diva-351481 (URN)
Opponent
Supervisors
Available from: 2018-05-28 Created: 2018-05-25 Last updated: 2018-05-31Bibliographically approved
Orfanidis, C., Feeney, L. M., Jacobsson, M. & Gunningberg, P. (2017). Investigating interference between LoRa and IEEE 802.15.4g networks. In: Proc. 13th International Conference on Wireless and Mobile Computing, Networking and Communications: . Paper presented at WiMob 2017, October 9–11, Rome, Italy (pp. 441-448). IEEE
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
Enemark, H.-J., Zhang, Y., Dragoni, N. & Orfanidis, C. (2015). Energy-efficient fault-tolerant dynamic event region detection in wireless sensor networks. In: Proc. 81st IEEE Vehicular Technology Conference: . Paper presented at 2015 IEEE 81st Vehicular Technology Conference: VTC2015-Spring 11–14 May 2015, Glasgow, Scotland. IEEE conference proceedings
Open this publication in new window or tab >>Energy-efficient fault-tolerant dynamic event region detection in wireless sensor networks
2015 (English)In: Proc. 81st IEEE Vehicular Technology Conference, IEEE conference proceedings, 2015Conference paper, Published paper (Refereed)
Abstract [en]

Fault-tolerant event detection is fundamental to wireless sensor network applications. Existing approaches usually adopt neighborhood collaboration for better detection accuracy,while need more energy consumption due to communication.Focusing on energy efficiency, this paper makes an improvement to a hybrid algorithm for dynamic event region detection, such asreal-time tracking of chemical leakage regions. Considering the characteristics of the moving away dynamic events, we propose areturn back condition for the hybrid algorithm from distributed neighborhood collaboration, in which a node makes its detection decision based on decisions received from its spatial and temporal neighbors, to local non-communicative decision making. The simulation results demonstrate that the improved algorithm doesnot degrade the detection accuracy of the original algorithm,while it has better energy efficiency with the number of messages exchanged in the network decreased.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2015
Series
IEEE Vehicular Technology Conference Proceedings, ISSN 1550-2252
National Category
Computer Systems
Identifiers
urn:nbn:se:uu:diva-254427 (URN)000371404700229 ()9781479980895 (ISBN)
Conference
2015 IEEE 81st Vehicular Technology Conference: VTC2015-Spring 11–14 May 2015, Glasgow, Scotland
Projects
ProFuN
Available from: 2015-06-08 Created: 2015-06-08 Last updated: 2016-07-13Bibliographically approved
Fafoutis, X., Di Mauro, A., Orfanidis, C. & Dragoni, N. (2015). Energy-efficient medium access control for energy harvesting communications. IEEE transactions on consumer electronics, 61(4), 402-410
Open this publication in new window or tab >>Energy-efficient medium access control for energy harvesting communications
2015 (English)In: IEEE transactions on consumer electronics, ISSN 0098-3063, E-ISSN 1558-4127, Vol. 61, no 4, p. 402-410Article in journal (Refereed) Published
Abstract [en]

While energy consumption is widely considered the primary challenge of wireless networked devices, energy harvesting emerges as a promising way of powering the Internet of Things (IoT). In the Medium Access Control (MAC) layer of the communication stack, energy harvesting introduces spatial and temporal uncertainty in the availability of energy. In this context, this paper focuses on the design and implementation of the MAC layer of wireless embedded systems that are powered by energy harvesting; providing novel protocol features and practical experiences to designers of consumer electronics who opt for tailoring their own protocol solutions instead of using the standards(1).

Keywords
Medium access control; energy harvesting communications; energy harvesting - wireless sensor networks; internet of things
National Category
Communication Systems
Research subject
Computer Science with specialization in Computer Communication
Identifiers
urn:nbn:se:uu:diva-267853 (URN)10.1109/TCE.2015.7389793 (DOI)000369494900002 ()
Funder
Danish National Research Foundation
Available from: 2016-01-25 Created: 2015-11-27 Last updated: 2017-12-01
Orfanidis, C., Zhang, Y. & Dragoni, N. (2015). Fault detection in WSNs: An energy efficiency perspective towards human-centric WSNs. In: Agent and Multi-Agent Systems: Technologies and Applications. Paper presented at KES-AMSTA 2015, June 17–19, Sorrento, Italy (pp. 285-300). Springer
Open this publication in new window or tab >>Fault detection in WSNs: An energy efficiency perspective towards human-centric WSNs
2015 (English)In: Agent and Multi-Agent Systems: Technologies and Applications, Springer, 2015, p. 285-300Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Springer, 2015
Series
Smart Innovation, Systems and Technologies ; 38
National Category
Communication Systems
Identifiers
urn:nbn:se:uu:diva-269124 (URN)10.1007/978-3-319-19728-9_24 (DOI)978-3-319-19727-2 (ISBN)
Conference
KES-AMSTA 2015, June 17–19, Sorrento, Italy
Available from: 2015-05-29 Created: 2015-12-14 Last updated: 2015-12-14Bibliographically approved
Jacobsson, M. & Orfanidis, C. (2015). Using software-defined networking principles for wireless sensor networks. In: Proc. 11th Swedish National Computer Networking Workshop: . Paper presented at SNCNW 2015, May 28–29, Karlstad, Sweden.
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
Orfanidis, C., Feeney, L. M., Jacobsson, M. & Gunningberg, P.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
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-6581-314X

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