WIRELESS POWER RECEPTION DEVICE, WIRELESS POWER TRANSMISSION DEVICE, AND METHOD FOR TRANSMITTING/RECEIVING MESSAGES BETWEEN WIRELESS POWER RECEPTION DEVICE AND WIRELESS POWER TRANSMISSION DEVICE USING DATA TRANSMISSION STREAM

A wireless power reception device according to an embodiment of the present document comprises: a power pickup circuit which receives wireless power from a wireless power transmission device; and a communication/control circuit which communicates with the wireless power transmission device and controls the wireless power, wherein the communication/control circuit may transmit and receive application-level messages with the wireless power transmission device by using a data transport stream including an auxiliary data control (ADC) packet and a plurality of continuous auxiliary data transmission (ADT) packets, and transmits a data packet including information about the maximum size of the ADT packet to the wireless power transmission device.