Implementation methodology of handshaking communication using wearable near-field coupling transceivers

Near-field coupling communication (NFCC) is a communication technology that treats the surface of the human body as a transmission path by using a carrier frequency below 10 MHz. Because the radiation signal to a space is suppressed in NFCC, humans wearing an NFCC transceiver (TRX) can exchange personal information through handshaking without having to worry about information leakage. To establish stable personal information exchange, handshaking communication needs to satisfy two requirements relating to the signal propagation loss difference between standing and handshaking postures and the S/N ratio in the handshaking posture. From the equivalent circuit of the handshaking communication, we present the position of the TRXs that satisfy the two requirements. Experimental results revealed that the two requirements are satisfied when NFCC TRXs are inserted into the soles of shoes. As a result, we demonstrated that handshaking communication can be implemented by inserting TRXs into the soles of shoes.