Optimal Number of LED Lamps for Li-Fi Communications

A Light Fidelity (Li-Fi) is a wireless communication technology that relies on light to transmit data. This technology is similar to Wi-Fi communication that relies on radio frequencies to transmit data. The Li-Fi technology is operated through LED lamps where the light intensity is obtained by photoreceptor and then this data will be sent to the devices connected to the network. For Wi-Fi, the dense access points provide more reliability and higher SNR. Unlike Wi-Fi, higher SNR of Li-Fi means stronger illuminance to both devices and human eyes. Then, this can be harmful to user’s health unintentionally. In this paper, the optimal number of LED lamps for one standard-sized room is presented. The minimum and maximum illuminations based on LES (Illumination Engineering Society) that is very detrimental to the human eyes are consider here. Moreover, three commercial LED bulbs with different wattage sizes are adopted in simulation. The results show that either 2×2 or 3×3 LED lamps is the optimal number depending on the condition of limited power and SNR requirement.