LiFi based Positioning for Indoor Scenarios

An indoor positioning system integrated with wireless communication is an essential tool for future Internet of Things applications. This paper presents a time-of-flight-based positioning approach based on networked optical wireless communication, which is also known as LiFi. Our proposed system is based on the ITU-T G.9991 standard and enables positioning besides communication using the existing physical layer protocol. In this paper, we introduce this approach and evaluate the positioning performance in a conference room. Results show that the physical layer frame in G999.1 enables ranging with an accuracy of below 5 centimeters, besides enabling wireless communications. Moreover, we show that our LiFi system is able to cover a large area suitable for realistic indoor scenarios.