High Speed Wireless Data Transmission Using Li-Fi for Android Mobile

Nowadays the audio video data transmission between two android phones takes time. This paper gives the design of system full-duplex wireless visible light communication (VLC) system based on Light fidelity (Li-Fi) which transmit data bidirectional simultaneously by using LED as transmitter and Si PIN (Hamamatsu S6968) photodiode as receiver between two android mobile. This system develops a prototype to demonstrate a bidirectional wireless communication system based on Android Mobile. In this system, two android mobiles phones can transmit local data stored in the memory of mobile to each other anyone mobile either act as a transmitter or receiver. The system consists of two parts mainly one is hardware and other software. The hardware design is based on the USB port integrated to Android Mobile. The development of software utilizes the protocol of AOA (Android Open Accessory) which is a new feature in Android 3.1 or more advanced version  by connecting external USB bridge which  allowing data transmission between Android devices over USB interfaces. Combing with a USB port on one board, it can achieve up to 3Mbps bit rates error free, which is mainly limited to the USB bridge circuit between two mobiles for data transmission such as text, audio and video. This paper also shows the experimental results and the relationship between system transmission eye diagram and bit rate. &nbsp