Wireless power transfer apparatus, wireless power receiving apparatus, wireless power transfer method, wireless power receiving method, wireless power transfer system using dual mode and recording medium thereof

A wireless power receiving apparatus obtaining data and power by using a power signal transferred from a wireless power transfer apparatus, the wireless power receiving apparatus comprising:

• a communication unit receiving the power signal transferred from the wireless power transfer apparatus and communicating with the outside;
• a power harvesting unit harvesting power for charging a battery of the wireless power receiving apparatus from the power signal by using an energy harvesting technique;
• a mode determination unit determining one communication mode of a single tone mode using a single tone signal and a multi-tone mode using a multi-tone signal as the power signal for communication with the wireless power transfer apparatus;
• and
• a signal processing unit demodulating the power signal according to the communication mode determined by the mode determination unit to obtain data,
• wherein the single tone signal is a single-frequency sinusoidal signal, the multi-tone signal is a multi-frequency sinusoidal signal, and the single tone mode and the multi-tone mode use different modulation schemes respectively, and
• the mode determination unit determines one communication mode based on received power of the power signal, a required transfer rate of the power signal required by the wireless power receiving apparatus, and a state of the battery.

A wireless power receiving method receiving, by a wireless power receiving apparatus, data and power by using a power signal transferred from a wireless power transfer apparatus by using a power signal, the method performed by the wireless power receiving apparatus, comprising:

• receiving the power signal transferred from the wireless power transfer apparatus through a communication unit;
• harvesting power for charging a battery by an energy harvesting technique by using the power signal;
• and
• demodulating the power signal in order to obtain the data based on communication mode information,
• wherein the power signal corresponds to a single tone signal which is a single-frequency sinusoidal signal or a multi-tone signal which is a multi-frequency sinusoidal signal generated by the wireless power transfer apparatus,
• the wireless power receiving apparatus demodulates the power signal by using different demodulation schemes according to the communication mode information, and
• the communication mode information corresponds to information which is determined based on a state of the battery, received power of the power signal, and a required transfer rate of the wireless power receiving apparatus and fed back by the wireless power receiving apparatus.