RF SIM card, card reader, and communication method
First Claim
1. A radio frequency (RF) device comprising:
- an RF transceiver;
an RF antenna; and
a magnetic signal detector;
wherein the magnetic signal detector is configured to;
receive a magnetic field signal from an RF reader, the magnetic field signal including identification information of the RF reader, anddetermine, based on the magnetic field signal, whether the RF device and the RF reader are in an effective communication,wherein the RF transceiver is configured to;
send authentication information to the RF reader, andconduct a transaction with the RF reader through an RF channel, andwherein the magnetic field signal comprises a low-frequency alternating magnetic field that has a frequency selected such that at or below the frequency no calibration is required for different mobile terminals having the RF device installed therein.
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Accused Products
Abstract
A radio frequency (RF) device includes an RF transceiver, an RF antenna, and a magnetic signal detector. The RF is selected to be in the very high frequency (VHF), ultrahigh frequency (UHF), or super high frequency (SHF) bands such that the shielding effect is reduced and the RF device can be configured as a SIM card disposed inside a cellular phone with an increased RF communication range. The magnetic signal detector is used to sense a magnetic field signal from an RF reader, which includes an RF transceiver, an RF antenna, and a magnetic signal transmitter. The longer communication range afforded by the VHF, UHF, or SHF bands is reduced by the sensing of the magnetic field, thereby providing a communication range control, while the RF device and the RF reader exchange information through the RF channel with improved security as a result of the range control.
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Citations
81 Claims
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1. A radio frequency (RF) device comprising:
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an RF transceiver; an RF antenna; and a magnetic signal detector; wherein the magnetic signal detector is configured to; receive a magnetic field signal from an RF reader, the magnetic field signal including identification information of the RF reader, and determine, based on the magnetic field signal, whether the RF device and the RF reader are in an effective communication, wherein the RF transceiver is configured to; send authentication information to the RF reader, and conduct a transaction with the RF reader through an RF channel, and wherein the magnetic field signal comprises a low-frequency alternating magnetic field that has a frequency selected such that at or below the frequency no calibration is required for different mobile terminals having the RF device installed therein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A communication system, comprising:
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an RF device; and an RF reader, wherein the RF device and the RF reader are configured to have a communication range controlled through a magnetic signal and to exchange information through an RF channel, wherein the RF reader is configured to transmit a low-frequency alternating magnetic field signal including identification information of the RF reader, wherein at least one of the RF reader and the RF device is configured; (A) to determine whether the RF device and the RF reader are in a predetermined effective communication range, based on the low-frequency alternating magnetic field signal detected by the RF device, and (B) to authenticate the other of the RF reader or the RF device through at least one of the low-frequency alternating magnetic field signal or an RF channel, and wherein both the RF reader and the RF device are configured to perform a transaction therebetween through the RF channel. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. A communication method of an RF device communicating with an RF reader and controlling a communication range between the RF device and the RF reader using a magnetic field generated by a magnetic signal transmitter of the RF reader, the RF device comprising a magnetic signal detector configured to detect a magnetic field signal transmitted from the magnetic signal transmitter, the method comprising:
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receiving, by the magnetic signal detector, the magnetic field signal modulated by the magnetic signal transmitter based on predetermined instruction information; decoding, by the magnetic signal detector, the instruction information after receiving the magnetic field signal; sending, by the RF device, based on the decoded instruction information, the corresponding RF information to the RF reader through an RF channel; and exchanging, by the RF device with the RF reader, information through a radio frequency (RF) communication if an identification performed by the RF reader based on the RF information passes. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81)
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Specification