A novel adaptive Wavelength Division Multiple Access (WDMA) scheme is presented in this paper, capable of contrasting the effect of the Passband Shift (PS) phenomenon in an indoor densely deployed LiFi network. After an overview on WDMA in an indoor Internet of Things (IoT) setting, simulation work is defined and carried out. Results show how in such settings, the loss of connection is reduced to an average of 0.72 % compared to 31.25 % when using Adaptive WDMA. Additionally, the users are served with higher average speeds and better fairness.
CCS CONCEPTS• Networks → Network resources allocation; Network layer protocols; • Human-centered computing → Ubiquitous and mobile devices.
In this paper we investigate the impact of the passband shift (PS) phenomenon on optical wireless communication (OWC) systems based on wavelength division (WD). We first introduce the associated challenges, then we discuss the mathematical framework needed to evaluate the performance of systems based on WD when the impact of the PS phenomenon is taken into account. We introduce the concept of spectral overlap (SO) and discuss its role in the design of WD solutions. Results show that this design phase has to take the SO into account, and that its careful balance with the channel gain is essential when multiple colours are used for parallel communication in OWC.
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