On the use of nb-iot over geo satellite systems with time-packed optical feeder links for over-the-air firmware/software updates of machine-type terminals
Por:
Bas, J, Dowhuszko, AA
Publicada:
1 ene 2021
Resumen:
The verticals of 5G, such as the automotive, smart grid, and smart cities sectors, will bring new sensors and IoT devices requiring Internet connectivity. Most of these machine-type terminals will be sparsely distributed, covering a very large geographical area and, from time to time, will have to update their software, firmware, and/or other relevant data. Given this situation, one viable solution to implement the “Over-the-Air” update of these IoT terminals can be done with the aid of GEO satellite systems. However, due to the ultra-dense radio frequency reuse factor that contemporary High-Throughput Satellite (HTS) systems implement in the access link to serve the IoT terminals, the use of a time-packed Free Space Optical (FSO) link represents a practical solution to avoid the bottleneck that the satellite gateway experiences in the feeder link. The performance of both Detect-and-Forward and Decode-and-Forward relaying strategies are studied, assuming that the single-carrier M-PAM symbols that are transmitted on the optical feeder link are mapped into M-QAM symbols that modulate the multiple sub-carriers of the OFDM-based radio access link. In addition, the benefits of encapsulating the NB-IoT frames into DVB-S2(X) satellite frames is also analyzed in detail. The effects of the impairments introduced in both the optical feeder and radio access links are characterized in detail, and the end-to-end error correction capabilities of the Modulation and Coding Schemes (MCS) defined in the contemporary releases of the NB-IoT and DVB-S2(X) standards are studied for different working regimes. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Filiaciones:
Bas, J:
Department of Array and Multi-Sensor Processing, Centre Tecnològic de Telecomunicacions de Catalunya (CTTC/CERCA), Av. Karl Friedriech Gauss 7—Building B4, Castelldefels, 08860, Spain
Dowhuszko, AA:
Department of Communications and Networking, Aalto University, Espoo, 02150, Finland
Green Submitted, Green Published, gold, All Open Access; Gold Open Access; Green Open Access
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