Evaluation of Communication Link Performance and Charging Speed in Self-Powered Internet of Underwater Things Devices

  1. Majlesein, Behnaz 2
  2. Guerra, Victor 3
  3. Rabadan, Jose 1
  4. Rufo, Julio 2
  5. Perez-Jimenez, Rafael 1
  1. 1 IDeTIC, Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
  2. 2 LightBee S.L., Las Palmas de Gran Canaria, Spain
  3. 3 Pi Lighting Sarl, Sion, Switzerland
  4. 4 Universidad de La Laguna
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    Universidad de La Laguna

    San Cristobal de La Laguna, España

    ROR https://ror.org/01r9z8p25

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Revista:
IEEE Access

ISSN: 2169-3536

Año de publicación: 2022

Volumen: 10

Páginas: 100566-100575

Tipo: Artículo

DOI: 10.1109/ACCESS.2022.3207760 GOOGLE SCHOLAR lock_openAcceso abierto editor

Otras publicaciones en: IEEE Access

Resumen

The energy consumption of the Internet of underwater things (IoUT) nodes is a capital aspect that dramatically affects the applicability of wireless optical technologies in several scenarios, such as ocean monitoring or underwater sensor networks. Simultaneous lightwave information and power transfer (SLIPT) is a cost-effective and energy-efficient solution for energy-constrained wireless systems. Nonetheless, the reported battery-charging times for underwater operations are high, which should be improved to make this technology attractive enough to be considered for actual implementations. This paper provides a new SLIPT strategy, introducing a specific optical signal transmission scheme by controlling the transmitted direct current (DC) level component. The scheme is based on a DC-On Off Keying (OOK) modulation with an adjustable signal range (SR) to improve the energy-harvesting process and battery-charging time for underwater operations. The results reveal that the system provides a signal-to-noise ratio higher than 28 dB and the bit-error rate of less than 10−10 which is below the forward error correction limit with improved charging time around 30 minutes and 15 seconds for 5 F and 9.4 mF, respectively over 20 cm, and 63 seconds for 9.4 mF in 50 cm link distance.

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