Configuration of NFC routers for P2P communication
View Patent ↗A method for configuring a first device for a near-field communication with a second device, wherein a peer-to-peer mode is selected if the second device draws the power supply of its circuits from a battery.
1. A method, comprising:
determining, by a first near-field communication device, whether a second near-field communication device is self-powered; and
selecting, by the first near-field communication device, a mode of communication with the second near-field communication device based on the determination of whether the second near-field communication device is self-powered, wherein the determining comprises:
measuring, by the first near-field communication device, information representative of a current in an oscillating circuit generating a communication field; and
comparing, by the first near-field communication device, the measured information with a first threshold indicative of whether the second near-field communication device is drawing power from the communication field.
2. The method of claim 1 wherein a peer-to-peer mode of communication is selected by the first near-field communication device when a value of said measured information is higher than said first threshold.
3. The method of claim 1 wherein a peer-to-peer mode of communication is selected by the first near-field communication device when a value of said measured information is lower than a second threshold and higher than said first threshold.
4. The method of claim 1 wherein when a value of said measured information is higher than said first threshold, the method comprises:
emitting, by the first near-field communication device, frames according to different modulation types; and
monitoring, by the first near-field communication device, a response of the second near-field communication device to the emitted frames.
5. The method of claim 1 , comprising:
setting a default communication mode of the first near-field communication device to type-F modulation.
6. A near-field communication device, comprising:
an oscillating circuit, which, in operation generates a communication field; and
processing circuitry coupled to the oscillating circuit, wherein the processing circuitry, in operation:
determines whether a second near-field communication device is self-powered; and
selects a mode of near-field communication with the second near-field communication device based on the determination of whether the second near-field communication device is self-powered, wherein the processing circuitry, in operation:
measures information representative of a current in the oscillating circuit; and
compares the measured information with a first threshold indicative of whether the second near-field communication device is extracting power from the communication field.
7. The device of claim 6 wherein the processing circuitry, in operation, selects a peer-to-peer mode of communication when a value of said measured information is higher than said first threshold.
8. The device of claim 6 wherein the processing circuitry, in operation, selects a peer-to-peer mode of communication when a value of said measured information is lower than a second threshold and higher than said first threshold.
9. The device of claim 6 wherein, in operation, when a value of said measured information is higher than said first threshold, the processing circuitry:
emits frames according to different modulation types; and
monitors a response of the second near-field communication device to the emitted frames.
10. The device of claim 6 wherein, in operation, the processing circuitry selects an initial communication mode of type-F modulation.
11. The device of claim 6 , comprising:
a battery; and
a touchscreen.
12. A device, comprising:
one or more inputs to couple to an oscillating circuit; and
processing circuitry coupled to the one or more inputs, wherein the processing circuitry, in operation:
determines whether a second near-field communication device is self-powered; and
selects a mode of near-field communication with the second near-field communication device based on the determination of whether the second near-field communication device is self-powered, wherein the processing circuitry, in operation:
measures information representative of a current in the oscillating circuit; and
compares the measured information with a first threshold indicative of whether the second near-field communication device is extracting power from a communication field generated by the oscillating circuit.
13. The device of claim 12 wherein the processing circuitry, in operation, selects a peer-to-peer mode of communication when a value of said measured information is higher than said first threshold.
14. The device of claim 12 wherein the processing circuitry, in operation, selects a peer-to-peer mode of communication when a value of said measured information is lower than a second threshold and higher than said first threshold.
15. The device of claim 12 wherein, in operation, when a value of said measured information is higher than said first threshold, the processing circuitry:
emits frames according to different modulation types; and
monitors a response of the second near-field communication device to the emitted frames.
16. The device of claim 12 wherein, in operation, the processing circuitry selects an initial communication mode of type-F modulation.
17. The device of claim 12 , comprising:
the oscillating circuit.