Patent ID: 9454682
Filing Date: 2016-09-27
CPC Classification: A61B,G06K,H04B,H04L,H04M,H04W

Claim Text:
1. A near field communication reader device comprising: a transmitter to transmit a request message to a near field communication tag device, the request message being formed according to a predetermined format, the request message including an identifier section in which an identifier that identifies the request message is disposed; a receiver to receive a response message from the near field communication tag device, the response message being formed based on the request message according to the predetermined format, and the response message including an identifier section in which an identifier that identifies the response message is disposed; and a processor to generate the identifier that identifies request message, compare the identifier that identifies the request message with the identifier that identifies the response message, wait until a response message is received that has an identifier that is different from the identifier that identifies the request message in order to identify the response message that has the identifier that is different from the identifier of the request message as valid, wherein the processor generates identifiers of request messages as arithmetic sums of a same constant value and identifiers of received response messages.