SYSTEM AND METHOD FOR DISTINGUISHING BETWEEN ACTIVE AND PASSIVE NFC DEVICES

A near field communication (NFC) reader detects whether NFC devices are passive NFC devices or active NFC devices. The NFC reader outputs an interrogation signal and a carrier signal. When the NFC reader receives a response signal from an NFC device responsive to the interrogation signal, the NFC re...

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Bibliographic Details
Main Authors WU, Gang, XIONG, Tianhao
Format Patent
LanguageEnglish
French
Published 03.06.2021
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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Summary:A near field communication (NFC) reader detects whether NFC devices are passive NFC devices or active NFC devices. The NFC reader outputs an interrogation signal and a carrier signal. When the NFC reader receives a response signal from an NFC device responsive to the interrogation signal, the NFC reader interrupts the carrier signal before the end of the response signal. The NFC reader determines whether the NFC device is a passive NFC device or an active NFC device depending on whether the response signal continues during the interruption of the interrogation signal. Un lecteur de communication en champ proche (NFC) détecte si des dispositifs NFC sont des dispositifs NFC passifs ou des dispositifs NFC actifs. Le lecteur NFC émet un signal d'interrogation et un signal de porteuse. Lorsque le lecteur NFC reçoit un signal de réponse d'un dispositif NFC en réponse au signal d'interrogation, le lecteur NFC interrompt le signal de porteuse avant la fin du signal de réponse. Le lecteur NFC détermine si le dispositif NFC est un dispositif NFC passif ou un dispositif NFC actif selon que le signal de réponse se poursuit pendant l'interruption du signal d'interrogation.
Bibliography:Application Number: WO2019CN121170