As the interest in Low Power Wide Area (LPWA) applications grows, the cellular technologies gain more attention as possible solutions to the overcrowded unlicensed spectrum. In its Release 13 (Rel-13) 3GPP defines, among the solutions, Narrowband Internet of Things (NB-IoT) as an LTE-based cellular technology which provides mass connectivity of devices with low power consumption, broad coverage and low cost. Following further releases, NB-IoT enhancements strive to meet the requirements of $5^{th}$ Generation's (5G) Massive Machine Type Communications (mMTC). In order to understand the physical layer characteristics, this work was based on building a NB-IoT link level simulator of the Narrowband Physical Downlink Shared Channel (NPDSCH) and analysing the performance while varying different parameters in signal processing blocks such as number of repetitions, operation modes, or Modulation and Coding Schemes (MCSs), and channel conditions such as the delay spread value. In addition, field measurements of the NB-IoT technology were conducted in a maritime port scenario to estimate coverage and radio frequency (RF) conditions in order to evaluate the quality of the wireless connection in the currently deployed system.
Con la crescita dell'interesse per le applicazioni LPWA (Low Power Wide Area), le tecnologie cellulari ottengono maggiore attenzione come possibili soluzioni allo spettro sovraffollato senza licenza. Nella sua Release 13 (Rel-13) 3GPP definisce, tra le soluzioni, Narrowband Internet of Things (NB-IoT) come una tecnologia cellulare basata su LTE che fornisce connettività di massa di dispositivi a basso consumo energetico, ampia copertura e basso costo. A seguito di ulteriori rilasci, i miglioramenti NB-IoT si sforzano di soddisfare i requisiti di 5th Generation (5G) Massive Machine Type Communications (mMTC). Per comprendere le caratteristiche dello strato fisico, questo lavoro si è basato sulla costruzione di un simulatore di livello di collegamento NB-IoT del canale condiviso di downlink fisico a banda stretta (NPDSCH) e sull'analisi delle prestazioni variando diversi parametri nei blocchi di elaborazione del segnale come il numero di ripetizioni, modalità operative o Modulation and Coding Schemes (MCS) e condizioni del canale come il valore di diffusione del ritardo. Inoltre, sono state condotte misurazioni del campo della tecnologia NB-IoT in uno scenario portuale marittimo per stimare la copertura e le condizioni di radiofrequenza (RF) al fine di valutare la qualità della connessione wireless nel sistema attualmente implementato.
Performance analysis of NB IoT using link level simulations and field measurements
TUTUNOVIC, MARIJA
2021/2022
Abstract
As the interest in Low Power Wide Area (LPWA) applications grows, the cellular technologies gain more attention as possible solutions to the overcrowded unlicensed spectrum. In its Release 13 (Rel-13) 3GPP defines, among the solutions, Narrowband Internet of Things (NB-IoT) as an LTE-based cellular technology which provides mass connectivity of devices with low power consumption, broad coverage and low cost. Following further releases, NB-IoT enhancements strive to meet the requirements of $5^{th}$ Generation's (5G) Massive Machine Type Communications (mMTC). In order to understand the physical layer characteristics, this work was based on building a NB-IoT link level simulator of the Narrowband Physical Downlink Shared Channel (NPDSCH) and analysing the performance while varying different parameters in signal processing blocks such as number of repetitions, operation modes, or Modulation and Coding Schemes (MCSs), and channel conditions such as the delay spread value. In addition, field measurements of the NB-IoT technology were conducted in a maritime port scenario to estimate coverage and radio frequency (RF) conditions in order to evaluate the quality of the wireless connection in the currently deployed system.File | Dimensione | Formato | |
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Thesis_Marija_Tutunovic_940229.pdf
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Thesis_Executive_Summary_MT_940229.pdf
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https://hdl.handle.net/10589/192634