• Usha M.
• Prof. (Dr.) Satish Kumar

(The exponential growth of data-hungry applications, smart devices, and connected infrastructure has placed unprecedented demands on wireless communication networks. While 5G offers high data rates and ultra-low latency, it faces spectrum congestion, security concerns, and energy challenges. Light Fidelity (Li-Fi), which uses the visible light spectrum for data transmission, provides vast unutilized bandwidth, enhanced security through line-of-sight transmission, and improved energy efficiency by utilizing existing LED infrastructure. This paper proposes an innovative hybrid framework combining Li-Fi and 5G networks to address current limitations and pave the way for Beyond-5G (B5G) and 6G communication systems. The proposed model integrates Li-Fi hotspots with 5G macro cells, supported by dynamic handover algorithms, intelligent resource allocation, and energy-aware routing. MATLAB and NS-3 simulation frameworks are used to model latency, throughput, and energy efficiency. Results show that the hybrid Li-Fi + 5G system significantly improves spectrum utilization, reduces latency, and achieves higher throughput compared to standalone 5G. Applications include high-density urban environments, hospitals, airports, and defense zones where secure, ultra-fast connectivity is crucial. This hybrid approach represents a transformative step toward sustainable, secure, and ubiquitous communication networks for future generations.)

Li-Fi; 5G; Beyond-5G (B5G); Hybrid Networks; Visible Light Communication (VLC); Throughput; Latency; Energy Efficiency; Network Handover; Sustainable Communication.

"“Hybrid Li-Fi and 5G Networks: A Next-Generation Framework for Ultra-Fast, Secure, andSustainable Communication Systems”", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 10, page no.b596-b613, October-2025, Available :http://www.jetir.org/papers/JETIR2510179.pdf

"“Hybrid Li-Fi and 5G Networks: A Next-Generation Framework for Ultra-Fast, Secure, andSustainable Communication Systems”", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 10, page no. ppb596-b613, October-2025, Available at : http://www.jetir.org/papers/JETIR2510179.pdf