CPC H04B 5/0031 (2013.01) [H04B 17/318 (2015.01)] | 17 Claims |
1. A method comprising:
receiving, by a first Near-Field Communication (NFC) device, a first signal from a second NFC device and exiting, by the first NFC device, a polling mode in response to a level of the first signal exceeding a first threshold;
receiving, by the first NFC, a second signal from the second NFC device and switching, by the first NFC device, to operating in a card mode in response to the second signal exceeding a second threshold that is greater than the first threshold;
determining, by the first NFC device, a type of modulation technology of the second NFC device from a plurality of types of modulation technology and setting a third threshold depending on the type of modulation technology;
receiving a third signal by the first NFC device configured in card mode; and
initiating a transaction between the first NFC device and the second NFC device configured in reader mode based on a level of the third signal reaching the third threshold.
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