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Publications (10 of 138) Show all publications
De Guglielmo, D., Al Nahas, B., Duquennoy, S., Voigt, T. & Anastasi, G. (2017). Analysis and experimental evaluation of IEEE 802.15.4e TSCH CSMA-CA Algorithm. IEEE Transactions on Vehicular Technology, 66(2), 1573-1588
Open this publication in new window or tab >>Analysis and experimental evaluation of IEEE 802.15.4e TSCH CSMA-CA Algorithm
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2017 (English)In: IEEE Transactions on Vehicular Technology, ISSN 0018-9545, E-ISSN 1939-9359, Vol. 66, no 2, p. 1573-1588Article in journal (Refereed) Published
Abstract [en]

Time-slotted channel hopping (TSCH) is one of the medium access control (MAC) behavior modes defined in the IEEE 802.15.4e standard. It combines time-slotted access and channel hopping, thus providing predictable latency, energy efficiency, communication reliability, and high network capacity. TSCH provides both dedicated and shared links. The latter is special slots assigned to more than one transmitter, whose concurrent access is regulated by a carrier-sense multiple access with collision avoidance (CSMA-CA) algorithm. In this paper, we develop an analytical model of the TSCH CSMA-CA algorithm to predict the performance experienced by nodes when using shared links. The model allows for deriving a number of metrics, such as delivery probability, packet latency, and energy consumption of nodes. Moreover, it considers the capture effect (CE) that typically occurs in real wireless networks. We validate the model through simulation experiments and measurements in a real testbed. Our results show that the model is very accurate. Furthermore, we found that the CE plays a fundamental role as it can significantly improve the performance experienced by nodes.

Keywords
Capture effect (CE), IEEE 802.15.4e, time-slotted channel hopping (TSCH), wireless sensor and actuator networks (WSANs)
National Category
Computer Systems
Identifiers
urn:nbn:se:uu:diva-308593 (URN)10.1109/TVT.2016.2553176 (DOI)000395740300055 ()
Funder
Swedish Research CouncilVINNOVA
Available from: 2016-11-28 Created: 2016-11-28 Last updated: 2017-11-29Bibliographically approved
Varshney, A., Soleiman, A., Mottola, L. & Voigt, T. (2017). Battery-free Visible Light Sensing. In: Proc. 4th ACM Workshop on Visible Light Communication Systems: . Paper presented at VLCS 2017, October 16, Snowbird, UT (pp. 3-8). New York: ACM Press
Open this publication in new window or tab >>Battery-free Visible Light Sensing
2017 (English)In: Proc. 4th ACM Workshop on Visible Light Communication Systems, New York: ACM Press, 2017, p. 3-8Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
New York: ACM Press, 2017
National Category
Computer Engineering
Identifiers
urn:nbn:se:uu:diva-335564 (URN)10.1145/3129881.3129890 (DOI)978-1-4503-5142-3 (ISBN)
Conference
VLCS 2017, October 16, Snowbird, UT
Available from: 2017-10-16 Created: 2017-12-06 Last updated: 2018-03-16Bibliographically approved
Raza, S., Misra, P., He, Z. & Thiemo, V. (2017). Building the Internet of Things with bluetooth smart. Ad hoc networks, 57, 19-31
Open this publication in new window or tab >>Building the Internet of Things with bluetooth smart
2017 (English)In: Ad hoc networks, ISSN 1570-8705, E-ISSN 1570-8713, Vol. 57, p. 19-31Article in journal (Refereed) Published
Abstract [en]

The Internet of Things, or the IoT, is an emerging, disruptive technology that enables physical devices to communicate across disparate networks. IP has been the de facto standard for seamless interconnectivity in the traditional Internet; and piggybacking on the success of IP, 6LoWPAN has been the first standardized technology to realize it for networks of resource-constrained devices. In the recent past Bluetooth Low Energy (BLE) a.k.a Bluetooth Smart - a subset of the Bluetooth v4.0 and the latest v4.2 stack, has surfaced as an appealing alternative, with many competing advantages over available low-power communication technologies in the IoT space such as IEEE 802.15.4. However, BLE is a closed standard and lacks open hardware and firmware support, something that hinders innovation and development in this field. In this article, we aim to overcome some of the constraints in BLE's core building blocks by making three contributions: first, we present the design of a new open hardware platform for BLE; second, we provide a Contiki O.S. port for the new platform; and third, we identify research challenges and opportunities in 6LoWPAN-connected Bluetooth Smart. We believe that the knowledge and insights will facilitate IoT innovations based on this promising technology.

Keywords
Internet of things, IoT, Bluetooth LE, BLE, Open hardware, Open source, Contiki O.S
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:uu:diva-318918 (URN)10.1016/j.adhoc.2016.08.012 (DOI)000394400100003 ()
Available from: 2017-04-03 Created: 2017-04-03 Last updated: 2018-01-13Bibliographically approved
Asan, N. B., Carlos, P. P., Redzwan, S., Noreland, D., Hassan, E., Rydberg, A., . . . Augustine, R. (2017). Data Packet Transmission through Fat Tissue for Wireless Intra-Body Networks. IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology
Open this publication in new window or tab >>Data Packet Transmission through Fat Tissue for Wireless Intra-Body Networks
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2017 (English)In: IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology, ISSN 2469-7249Article in journal (Refereed) Epub ahead of print
Abstract [en]

This work explores high data rate microwave communication through fat tissue in order to address the wide bandwidth requirements of intra-body area networks. We have designed and carried out experiments on an IEEE 802.15.4 based WBAN prototype by measuring the performance of the fat tissue channel in terms of data packet reception with respect to tissue length and power transmission. This paper proposes and demonstrates a high data rate communication channel through fat tissue using phantom and ex-vivo environments. Here, we achieve a data packet reception of approximately 96 % in both environments. The results also show that the received signal strength drops by ~1 dBm per 10 mm in phantom and ~2 dBm per 10 mm in ex-vivo. The phantom and ex-vivo experimentations validated our approach for high data rate communication through fat tissue for intrabody network applications. The proposed method opens up new opportunities for further research in fat channel communication. This study will contribute to the successful development of high bandwidth wireless intra-body networks that support high data rate implanted, ingested, injected, or worn devices

Keywords
Intra-body communication, microwave, channel characterization, data packet, Software Defined Radio, GNU Radio, exvivo, phantom
National Category
Engineering and Technology Medical and Health Sciences
Identifiers
urn:nbn:se:uu:diva-335351 (URN)10.1109/JERM.2017.2766561 (DOI)
Projects
Eurostars project under Grant E-9655-COMFORTSwedish Vinnova project under Grant BDAS (2015-04159)Swedish Vinnova project under Reliable, interoperable and secure communication for body network (2017-03568)
Funder
eSSENCE - An eScience CollaborationVINNOVA, 2015-04159VINNOVA, 2017-03568
Available from: 2017-12-04 Created: 2017-12-04 Last updated: 2017-12-05Bibliographically approved
Soleiman, A., Varshney, A., Mottola, L. & Voigt, T. (2017). Demo: Battery-free Visible Light Sensing. In: Proc. 4th ACM Workshop on Visible Light Communication Systems: . Paper presented at VLCS 2017, October 16, Snowbird, UT (pp. 35-35). New York: ACM Press
Open this publication in new window or tab >>Demo: Battery-free Visible Light Sensing
2017 (English)In: Proc. 4th ACM Workshop on Visible Light Communication Systems, New York: ACM Press, 2017, p. 35-35Conference paper, Poster (with or without abstract) (Refereed)
Place, publisher, year, edition, pages
New York: ACM Press, 2017
National Category
Computer Engineering
Identifiers
urn:nbn:se:uu:diva-335568 (URN)10.1145/3129881.3129898 (DOI)978-1-4503-5142-3 (ISBN)
Conference
VLCS 2017, October 16, Snowbird, UT
Available from: 2017-10-16 Created: 2017-12-06 Last updated: 2018-01-13Bibliographically approved
Varshney, A., Pérez Penichet, C., Rohner, C. & Voigt, T. (2017). Demo: LoRea: A backscatter architecture that achieves a long communication range. In: Proc. 15th ACM Conference on Embedded Network Sensor Systems: . Paper presented at SenSys 2017, November 5–8, Delft, The Netherlands. New York: ACM Press
Open this publication in new window or tab >>Demo: LoRea: A backscatter architecture that achieves a long communication range
2017 (English)In: Proc. 15th ACM Conference on Embedded Network Sensor Systems, New York: ACM Press, 2017Conference paper, Poster (with or without abstract) (Refereed)
Place, publisher, year, edition, pages
New York: ACM Press, 2017
National Category
Computer Engineering
Identifiers
urn:nbn:se:uu:diva-335567 (URN)10.1145/3131672.3136996 (DOI)978-1-4503-5459-2 (ISBN)
Conference
SenSys 2017, November 5–8, Delft, The Netherlands
Available from: 2017-11-05 Created: 2017-12-06 Last updated: 2018-01-13
Asan, N. B., Redzwan, S., Rydberg, A., Augustine, R., Noreland, D., Hassan, E. & Voigt, T. (2017). Human fat tissue: A microwave communication channel. In: Proc. 1st MTT-S International Microwave Bio Conference: . Paper presented at IMBIOC 2017, May 15–17, Gothenburg, Sweden. IEEE
Open this publication in new window or tab >>Human fat tissue: A microwave communication channel
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2017 (English)In: Proc. 1st MTT-S International Microwave Bio Conference, IEEE, 2017Conference paper, Published paper (Refereed)
Abstract [en]

In this paper, we present an approach for communication through human body tissue in the R-band frequency range. This study examines the ranges of microwave frequencies suitable for intra-body communication. The human body tissues are characterized with respect to their transmission properties using simulation modeling and phantom measurements. The variations in signal coupling with respect to different tissue thicknesses are studied. The simulation and phantom measurement results show that electromagnetic communication in the fat layer is viable with attenuation of approximately 2 dB per 20 mm. 

Place, publisher, year, edition, pages
IEEE, 2017
Keywords
tissue characterization, transmission medium, biomedical sensor, channel model, phantom measurement
National Category
Medical Engineering
Identifiers
urn:nbn:se:uu:diva-335479 (URN)10.1109/IMBIOC.2017.7965801 (DOI)978-1-5386-1713-7 (ISBN)
Conference
IMBIOC 2017, May 15–17, Gothenburg, Sweden
Projects
Eurostars project (grant E-9655-COMFORT)Swedish Vinnova project (grant BDAS)eSSENCE
Available from: 2017-07-03 Created: 2017-12-05 Last updated: 2017-12-30Bibliographically approved
Asan, N. B., Noreland, D., Hassan, E., Redzwan, S., Rydberg, A., Blokhuis, T. J., . . . Augustine, R. (2017). Intra-body microwave communication through adipose tissue. Healthcare Technology Letters, 4(4), 115-121
Open this publication in new window or tab >>Intra-body microwave communication through adipose tissue
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2017 (English)In: Healthcare Technology Letters, E-ISSN 2053-3713, Vol. 4, no 4, p. 115-121Article in journal (Refereed) Published
National Category
Medical Engineering
Identifiers
urn:nbn:se:uu:diva-334322 (URN)10.1049/htl.2016.0104 (DOI)000408370500001 ()28868147 (PubMedID)
Projects
eSSENCE
Available from: 2017-05-23 Created: 2017-11-22 Last updated: 2017-12-30Bibliographically approved
Varshney, A., Harms, O., Pérez Penichet, C., Rohner, C., Hermans, F. & Voigt, T. (2017). LoRea: A backscatter architecture that achieves a long communication range. In: Proc. 15th ACM Conference on Embedded Network Sensor Systems: . Paper presented at SenSys 2017, November 5–8, Delft, The Netherlands. New York: ACM Press
Open this publication in new window or tab >>LoRea: A backscatter architecture that achieves a long communication range
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2017 (English)In: Proc. 15th ACM Conference on Embedded Network Sensor Systems, New York: ACM Press, 2017Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
New York: ACM Press, 2017
National Category
Computer Engineering
Identifiers
urn:nbn:se:uu:diva-335566 (URN)10.1145/3131672.3131691 (DOI)978-1-4503-5459-2 (ISBN)
Conference
SenSys 2017, November 5–8, Delft, The Netherlands
Available from: 2017-11-05 Created: 2017-12-06 Last updated: 2018-03-16Bibliographically approved
Voigt, T., Bor, M., Roedig, U. & Alonso, J. (2017). Mitigating Inter-network Interference in LoRa Networks. In: : . Paper presented at MadCom: New Wireless Communication Paradigms for the Internet of Things (Workshop hosted by the International Conference on Embedded Wireless Systems and Networks (EWSN)).
Open this publication in new window or tab >>Mitigating Inter-network Interference in LoRa Networks
2017 (English)Conference paper, Published paper (Refereed)
National Category
Computer Engineering
Identifiers
urn:nbn:se:uu:diva-335498 (URN)
Conference
MadCom: New Wireless Communication Paradigms for the Internet of Things (Workshop hosted by the International Conference on Embedded Wireless Systems and Networks (EWSN))
Available from: 2017-12-06 Created: 2017-12-06 Last updated: 2018-01-13Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-2586-8573

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