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On the Energy-efficient Use of Discontinuous Reception and Release Assistance in NB-IoT
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Mathematics and Computer Science (from 2013). (Distributed Systems and Communications Research Group (DISCO))ORCID iD: 0000-0001-5495-4318
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Mathematics and Computer Science (from 2013). (Distributed Systems and Communications Research Group (DISCO))ORCID iD: 0000-0002-6723-881X
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Mathematics and Computer Science (from 2013). (Distributed Systems and Communications Research Group (DISCO))ORCID iD: 0000-0001-7311-9334
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Mathematics and Computer Science (from 2013). (Distributed Systems and Communications Research Group (DISCO))ORCID iD: 0000-0003-0368-9221
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2022 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Cellular Internet of Things (CIoT) is a Low-Power Wide-Area Network (LPWAN) technology. It aims for cheap, lowcomplexity IoT devices that enable large-scale deployments and wide-area coverage. Moreover, to make large-scale deployments of CIoT devices in remote and hard-to-access locations possible, a long device battery life is one of the main objectives of these devices. To this end, 3GPP has defined several energysaving mechanisms for CIoT technologies, not least for the Narrow-Band Internet of Things (NB-IoT) technology, one of the major CIoT technologies. Examples of mechanisms defined include CONNECTED-mode DRX (cDRX), Release Assistance Indicator (RAI), and Power Saving Mode (PSM). This paper considers the impact of the essential energy-saving mechanisms on minimizing the energy consumption of NB-IoT devices, especially the cDRX and RAI mechanisms. The paper uses a purpose-built NB-IoT simulator that has been tested in terms of its built-in energy-saving mechanisms and validated with realworld NB-IoT measurements. The simulated results show that it is possible to save 70%-90% in energy consumption by enabling the cDRX and RAI. In fact, the results suggest that a battery life of 10 years is only achievable provided the cDRX, RAI, and PSM energy-saving mechanisms are correctly configured and used

Place, publisher, year, edition, pages
New York: IEEE Communications Society, 2022.
Keywords [en]
CIoT, NB-IoT, energy-efficiency, cDRX, RAI, PSM.
National Category
Telecommunications
Research subject
Computer Science
Identifiers
URN: urn:nbn:se:kau:diva-91882OAI: oai:DiVA.org:kau-91882DiVA, id: diva2:1695394
Conference
The IEEE 8th World Forum on Internet of Things(IEEE WFIoT) Yokohama, Japan, 26 October–11 November, 2022.
Available from: 2022-09-13 Created: 2022-09-13 Last updated: 2023-06-30Bibliographically approved
In thesis
1. Improving the Energy Efficiency of Cellular IoT Device
Open this publication in new window or tab >>Improving the Energy Efficiency of Cellular IoT Device
2023 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Cellular Internet of Things (CIoT) has emerged as a promising technology to support applications that generate infrequent data. One requirement on these applications, often battery-powered devices, is low energy consumption to enable extended battery life. Narrowband IoT (NB-IoT) is a promising technology for IoT due to its low power consumption, which is essential for devices that need to run on battery power for extended periods. However, the current battery life of NB-IoT devices is only a few years, which is insufficient for many applications. This thesis investigates the impact of energy-saving mechanisms standardized by 3GPP on battery life of NB-IoT devices. The main research objective is to classify and analyze existing energy-saving solutions for CIoT and examine their limitations, to study the impact of standardized energy-saving mechanisms on the battery life of NB-IoT devices, both in isolation and combined, and to provide guidelines on how to configure NB-IoT devices to reduce energy consumption efficiently. The research aims to provide a deeper understanding of the effect of energy-saving mechanisms and best practices to balance energy efficiency and performance of NB-IoT devices. Applying the proposed solutions makes it possible to achieve a battery life of 10~years or more for CIoT devices.

Place, publisher, year, edition, pages
Karlstad: Karlstads universitet, 2023. p. 23
Series
Karlstad University Studies, ISSN 1403-8099 ; 2023:8
Keywords
CIoT, 3GPP, energy saving, mMTC, NB-IoT, LTE-M, EC-GSM- IoT
National Category
Telecommunications
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-93790 (URN)978-91-7867-350-6 (ISBN)978-91-7867-351-3 (ISBN)
Presentation
2023-05-17, 1B306 (Fryxellsalen), 09:30 (English)
Opponent
Supervisors
Available from: 2023-04-26 Created: 2023-02-27 Last updated: 2023-04-19Bibliographically approved

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Abbas, Muhammad TahirEklund, JohanBrunström, AnnaAlfredsson, StefanRajiullah, MohammadGrinnemo, Karl-JohanCaso, GiuseppeAlay, Özgü

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Abbas, Muhammad TahirEklund, JohanBrunström, AnnaAlfredsson, StefanRajiullah, MohammadGrinnemo, Karl-JohanCaso, GiuseppeKousias, KonstantinosAlay, Özgü
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