Device and method for performing authentication in wireless power transmission system

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

• initiating a digital ping, and receiving, from a wireless power receiver during a ping phase, a response signal;
• receiving, from the wireless power receiver during a configuration phase, a configuration packet including first control information related to whether the wireless power receiver supports an authentication function;
• transmitting, to the wireless power receiver during a negotiation phase, a capability packet including second control information and a potential power value of the wireless power transmitter, wherein the second control information is related to whether the wireless power transmitter supports the authentication function;
• and
• transmitting power to the wireless power receiver.

A wireless power receiver comprising:

• a power pickup adapted to receive a wireless power from a wireless power transmitter;
• and
• a communicator/controller adapted to control the wireless power,
• wherein the wireless power receiver is adapted to:
• transmit, to the wireless power transmitter during a ping phase, a response signal in response to a digital ping initiated by the wireless power transmitter;
• transmit, to the wireless power transmitter during a configuration phase, a configuration packet including first control information related to whether the wireless power receiver supports an authentication function;
• receive, from the wireless power transmitter during a negotiation phase, a capability packet including second control information and a potential power value of the wireless power transmitter, wherein the second control information is related to whether the wireless power transmitter supports the authentication function;
• and
• receive power from the wireless power transmitter.

A wireless power transmitter comprising:

• a power pickup adapted to transmit a wireless power to a wireless power receiver;
• and
• a communicator/controller adapted to control the wireless power,
• wherein the wireless power transmitter is adapted to:
• initiate a digital ping, and receive, from the wireless power receiver during a ping phase, a response signal;
• receive, from the wireless power receiver during a configuration phase, a configuration packet including first control information related to whether the wireless power receiver supports an authentication function;
• transmit, to the wireless power receiver during a negotiation phase, a capability packet including second control information and a potential power value of the wireless power transmitter, wherein the second control information is related to whether the wireless power transmitter supports the authentication function;
• and
• transmit power to the wireless power receiver.