Analytic Analysis of Narrowband IoT Coverage Enhancement Approaches
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AuthorAndres-Maldonado, Pilar; Ameigeiras Gutiérrez, Pablo José; Prados-Garzon, Jonathan; Ramos Muñoz, Juan José; Navarro Ortiz, Jorge; Lopez-Soler, Juan M.
Institute of Electrical and Electronics Engineers (IEEE)
NB-IoTCoverage enhancementAnalytical modelLink adaptation
P. Andres-Maldonado, P. Ameigeiras, J. Prados-Garzon, J. J. Ramos-Munoz, J. Navarro-Ortiz and J. M. Lopez-Soler, "Analytic Analysis of Narrowband IoT Coverage Enhancement Approaches," 2018 Global Internet of Things Summit (GIoTS), 2018, pp. 1-6, doi: 10.1109/GIOTS.2018.8534539.
SponsorshipThis work is partially supported by the Spanish Ministry of Economy and Competitiveness and the European Regional Development Fund (Project TEC2016-76795-C6- 4-R), and the Spanish Ministry of Education, Culture and Sport (FPU Grant 13/04833).
The introduction of Narrowband Internet of Things (NB-IoT) as a cellular IoT technology aims to support massive Machine-Type Communications applications. These applications are characterized by massive connections from a large number of low-complexity and low-power devices. One of the goals of NB-IoT is to improve coverage extension beyond existing cellular technologies. In order to do that, NB-IoT introduces transmission repetitions and different bandwidth allocation configurations in uplink. These new transmission approaches yield many transmission options in uplink. In this paper, we propose analytical expressions that describe the influence of these new approaches in the transmission. Our analysis is based on the Shannon theorem. The transmission is studied in terms of the required Signal to Noise Ratio, bandwidth utilization, and energy per transmitted bit. Additionally, we propose an uplink link adaptation algorithm that contemplates these new transmission approaches. The conducted evaluation summarizes the influence of these approaches. Furthermore, we present the resulting uplink link adaptation from our proposed algorithm sweeping the device’s coverage.