System for wireless power transmission and reception using in-band communication

A wireless power receiver using an in-band communication, the wireless power receiver comprising:

• a target resonance unit configured to receive, from an in-band resonator, a wireless power and reception data including a wake-up signal;
• a demodulator configured to demodulate the reception data including the wake-up signal;
• a modulator configured to modulate transmission data including a response signal with respect to the wake-up signal, a charging request signal, and an identification (ID) of a target resonator that is awoken;
• and
• a target controller configured to control an impedance to perform impedance matching between a source resonator, the in-band resonator, and the awoken target resonator.

A method of transmitting wireless power using an in-band communication, the method comprising:

• receiving identification information associated with a wireless power receiver, via in-band resonators;
• demodulating the received identification information;
• controlling, based on the demodulated identification information, an impedance and a resonance frequency of a source resonator;
• transmitting the wireless power from the source resonator to the in-band resonators via a magnetic coupling;
• and
• transmitting the wireless power and transmission data, via an in-band resonator corresponding to the wireless power receiver from among the in-band resonators, wherein the transmission data is modulated according to switching of the in-band resonators.

A method of receiving wireless power using an in-band communication, the method comprising:

• receiving wireless power and reception data including a wake-up signal, from an in-band resonator;
• demodulating the reception data including the wake-up signal;
• modulating transmission data including a response signal with respect to the wake-up signal, a charging request signal, and an identification (ID) of a target resonator that is awoken;
• and
• controlling an impedance used to perform impedance matching between a source resonator, the in-band resonator, and the awoken target resonator.