Method and device for data communication based on fsk in wireless power transmission system

A wireless power receiver, comprising:

• a power pickup related to receiving wireless power from a wireless power transmitter;
• and
• a communicator/controller related to communicating with the wireless power transmitter and controlling reception of the wireless power,
• wherein the wireless power receiver:
• transmits, to the wireless power transmitter in a negotiation phase, specific request (SRQ) data packet,
• wherein the wireless power receiver establishes a power transfer contract with the wireless power transmitter based on the SRQ data packet,
• wherein the SRQ data packet is a data packet for a configuration of frequency shift keying (FSK);
• and
• performs, with the wireless power transmitter in a power transfer phase, a communication based on the FSK based on the power transfer contract,
• wherein the SRQ data packet includes information related to a number of cycles which make up a bit based on the FSK, and
• wherein the wireless power receiver decodes a bit based on the FSK within a range that varies depending on the number of the cycles.

A method for transferring a wireless power in a wireless power transfer system, the method performed by a wireless power transmitter and comprising:

• receiving, from a wireless power receiver in a negotiation phase, specific request (SRQ) data packet,
• wherein the wireless power transmitter establishes a power transfer contract with the wireless power receiver based on the SRQ data packet.
• wherein the SRQ data packet is a data packet for a configuration of frequency shift keying (FSK);
• and
• performs, with the wireless power receiver in a power transfer phase, a communication based on the FSK based on the power transfer contract.
• wherein the SRQ data packet includes information related to a number of cycles which make up a bit based on the FSK, and
• wherein a bit based on the FSK is decoded within a range that varies depending on the number of the cycles.