  The vision and requirements of the sixth generation (6G) mobile communication
systems are expected to adopt freespace optical communication (FSO) and
wireless power transfer (WPT). The laser-based WPT or wireless information
transfer (WIT) usually faces the challenges of mobility and safety. We present
a mobile and safe resonant beam communication (RBCom) system, which can realize
high-rate simultaneous wireless information and power transfer (SWIPT). We
propose an analytical model to depict its carrier beam and information transfer
procedures. The numerical results show that RBCom can achieve more than 40 mW
charging power and 1:6 Gbit/s channel capacity with orthogonal frequency
division multiplexing (OFDM) scheme, which can be applied in future scenario
where power and high-rate data are simultaneously desired.
