Energy and spectral efficiency of multi-tier LiFi networks

Ozyurt, Ahmet Burak and Bian, Rui and Haas, Harald and Popoola, Wasiu O.; (2023) Energy and spectral efficiency of multi-tier LiFi networks. In: 2023 IEEE Wireless Communications and Networking Conference, WCNC 2023 - Proceedings. IEEE Wireless Communications and Networking Conference, WCNC . Institute of Electrical and Electronics Engineers Inc., GBR. ISBN 9781665491228 (https://doi.org/10.1109/WCNC55385.2023.10118728)

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Abstract

In this paper, multi-tier LiFi networks are studied in terms of energy efficiency (EE) and spectral efficiency (SE), which are crucial metrics for LiFi system design. We derived a closed-form expression of the user association probability for different tiers using stochastic geometry based Poisson Voronoi Tessellation (PVT) LiFi network. The performance metrics of the network, EE and SE, are analyzed in terms of different parameters such as transmit power and Lambertian index. Performance evaluations and numerical results show that multi-tier LiFi networks have an optimum transmit power in which EE is maximized. Besides, increasing the transmit power does not increase SE after passing a threshold point. The resulting trade-off between EE and SE is presented.

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