Petkovic, M.Tegos, S.A.Diamantoulakis, P.D.Vukobratovic, D.Panayırcı, ErdalStefanovic, C.Karagiannidis, G.K.2023-10-192023-10-19202309798350337150https://doi.org/10.1109/WOCC58016.2023.10139621https://hdl.handle.net/20.500.12469/496432nd Wireless and Optical Communications Conference, WOCC 2023 --5 May 2023 through 6 May 2023 -- --189235In this work, we design and analyse a Slotted ALOHA (SA) solution for Optical Wireless Communication (OWC)-based Internet of Underwater Things (IoUT). In the proposed system, user devices exchange data with an access point (AP) which exploits the capture effect. The space spanned by the IoUT nodes is three-dimensional, i.e., users are located in half-sphere centered at the AP placed at the bottom of a floating object at the water surface level. The analytical expressions for the system throughput and reliability expressed in terms of the outage probability are derived. Based on the simulated signal-to-noise-and-interference-ratio statistics and derived analytical expressions, we present numerical results that investigate the trade-off between the system performance and the IoUT system parameters, such as the number of users, activation probability and type of water medium. The presented conclusions provide valuable insights into the design of an SA-based solution for IoUT communications. © 2023 IEEE.eninfo:eu-repo/semantics/closedAccessInternet of Underwater Things (IoUT)Optical Wireless Communications (OWC)Outage ProbabilityRandom AccessSlotted ALOHAThroughputEconomic and social effectsOptical communicationUnderwater optical wireless communicationAccess pointsAnalytical expressionsInternet of underwater thingInternet of underwater thingsOptical wireless communicationOptical-wireless communicationsOutage probabilityRandom accessSlotted AlohaSignal to noise ratioSlotted Aloha for Optical Wireless Communications in Internet of Underwater ThingsConference Object10.1109/WOCC58016.2023.101396212-s2.0-85162633841