Graph-based Modeling of Li-fi Networks

Keywords:
Graph, Li-Fi (Light Fidelity), Attocell Networks, Connectivity Analysis, Interferrence Analysis

Abstract:
This paper analyzes Li-Fi (Light Fidelity), a wireless communication technology, and examines its application in indoor environments with high user density. Li-Fi systems, based on visible light and the principle of intensity modulation with direct detection (IM/DD), enable high data transmission rates, low latency, and a high degree of spatial spectrum reuse, while specific characteristics such as dependence on line-of-sight (LOS) propagation, limited range of attocell cells, and medium access constraints create challenges in terms of connectivity, interference, and resource management. Modeling Li-Fi attocell networks using graph theory represents the network as a bipartite graph that describes the relationships between users and access points, where connectivity is formally defined based on reception conditions and SINR criteria. The analysis includes metrics such as node degree and coverage, which enable the identification of problems such as coverage holes and uneven network load. In addition to connectivity analysis, the paper introduces a conflict graph for modeling interference between competing links and resource allocation decisions. By integrating connectivity and interference analysis into a unified graph-based framework, a better understanding and improved optimization of Li-Fi network performance can be achieved.

CITATION:

IEEE format

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L. Stojanović, P. Spalević, “Graph-based Modeling of Li-fi Networks,” in Sinteza 2025 - International Scientific Conference on Information Technology, Computer Science, and Data Science, Belgrade, Singidunum University, Serbia, 2026, pp. 10-19. doi:10.15308/Sinteza-2026-10-19

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Stojanović, L., Spalević, P. (2026). Graph-based Modeling of Li-fi Networks. Paper presented at Sinteza 2025 - International Scientific Conference on Information Technology, Computer Science, and Data Science. doi:10.15308/Sinteza-2026-10-19

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