COMMUNICATION METHOD, DEVICE, AND SYSTEM
First Claim
1. A communication method, comprising:
- controlling a communication distance between a first radio frequency (RF) device and a second RF device using a low-frequency magnetic field; and
exchanging information between the first RF device and the second RF device within a predetermined distance range using RF channels.
1 Assignment
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Accused Products
Abstract
The present invention relates to a communication method, device, and system. The communication method include using low-frequency alternating magnetic field signals to control a communication distance between a first radio frequency (RF) device and second RF device. The communication device receives and uses a first low-frequency alternating magnetic field signal transmitted from a second RF device to control the communication distance to the second RF device. The communication system includes a first RF device and a second RF device. The first RF device generates and transmits a first low-frequency alternating magnetic field signal and receives a second low-frequency alternating magnetic field signal, and the second RF device generates and transmits the second low-frequency alternating magnetic field signal and receives the first low-frequency alternating magnetic field signal. The first RF device and the second RF device control the communication distance using the first and second low-frequency alternating magnetic field signals.
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Citations
52 Claims
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1. A communication method, comprising:
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controlling a communication distance between a first radio frequency (RF) device and a second RF device using a low-frequency magnetic field; and exchanging information between the first RF device and the second RF device within a predetermined distance range using RF channels. - View Dependent Claims (2, 3, 6, 7, 8, 14, 15, 17, 18, 19, 21, 22, 23, 24, 27)
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- 4. (canceled)
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9-13. -13. (canceled)
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16. (canceled)
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20. (canceled)
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25. (canceled)
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26. (canceled)
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28-33. -33. (canceled)
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34. A radio frequency (RF) device, comprising:
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a magnetic signal receiver module configured to receive a first low-frequency alternating magnetic field signal of another RF device; a main control module configured to control a communication distance between the RF device and the another RF device; and an RF transceiver module configured to exchange data with the another RF device within a predetermined distance range. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A communication system comprising a first radio frequency (RF) device and second RF device, wherein the first RF device and the second RF device control a communication distance using low-frequency alternating magnetic field signals and exchange information between the first RF device and the second RF device using RF channels, wherein:
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the first RF device further includes; a first magnetic signal transceiver configured to generate and transmit a first low-frequency alternating magnetic field signal and to receive a second low-frequency alternating magnetic field signal; a first RF communication unit configured to exchange information with the second RF device; the second RF device further includes; a second magnetic signal transceiver configured to generate and transmit the second low-frequency alternating magnetic field signal and to receive the first low-frequency alternating magnetic field signal; a second RF communication unit configured to exchange information with the first RF communication unit. - View Dependent Claims (48, 49, 50, 51, 52)
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Specification