Low-frequency receiving for radio frequency identification
First Claim
1. A radio frequency identification (RFID) tag comprising:
- a power source;
a transmitter coupled to the power source;
a receiver operatively coupled to the transmitter and to the power source, the receiver to receive low-frequency signals from an active RFID transceiver located within a vicinity of the receiver, wherein the transmitter is activated by the power source responsive to the receiver receiving a wake up command at a predetermined low frequency from the active RFID transceiver; and
a processor coupled to the transmitter and the receiver, the processor to, responsive to being activated by the wake up command;
detect a specific command located in data received within a high-frequency signal from the active RFID transceiver, the specific command being different than the wake up command; and
cause one of the transmitter or the receiver to take an action in response to the specific command.
1 Assignment
0 Petitions
Accused Products
Abstract
A radio frequency identification (RFID) tag includes a power source, a transmitter to transmit a unique identifier, and a receiver operatively coupled to the transmitter and to receive low-frequency signals from an active RFID transceiver located in the vicinity. The transmitter is activated by the power source responsive to the receiver receiving a wake up command at a predetermined low frequency from the active RFID transceiver. An RFID transceiver includes an antenna, non-transitory computer-readable medium storing instructions and a transmitter to transmit low-frequency signals to RFID tags through the antenna. A processing device of the RFID transceiver can execute the instructions to insert a station identifier (ID) into the low-frequency signals that direct the RFID tags to retransmit the station ID, wherein the station ID identifies an approximate location of the RFID tags.
25 Citations
24 Claims
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1. A radio frequency identification (RFID) tag comprising:
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a power source; a transmitter coupled to the power source; a receiver operatively coupled to the transmitter and to the power source, the receiver to receive low-frequency signals from an active RFID transceiver located within a vicinity of the receiver, wherein the transmitter is activated by the power source responsive to the receiver receiving a wake up command at a predetermined low frequency from the active RFID transceiver; and a processor coupled to the transmitter and the receiver, the processor to, responsive to being activated by the wake up command; detect a specific command located in data received within a high-frequency signal from the active RFID transceiver, the specific command being different than the wake up command; and cause one of the transmitter or the receiver to take an action in response to the specific command. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 17)
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10. A radio frequency identification (RFID) tag comprising:
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a power source; a transmitter coupled to the power source, the transmitter to transmit a unique identifier and to respond to commands after being activated; a receiver operatively coupled to the transmitter and to receive a high-frequency signal from an active RFID transceiver in response to being activated by a low-frequency wake up command from the active RFID transceiver; a non-transitory computer-readable medium storing instructions; and a processor coupled to the transmitter, the receiver, and the non-transitory computer-readable medium, the processor to execute the instructions to; detect a specific command located in data received within the high-frequency signal, the specific command being different than the wake up command; and cause one of the transmitter or the receiver to take an action in response to the specific command. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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18. An active radio frequency identification (RFID) transceiver comprising:
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an antenna; a transmitter coupled to the antenna, the transmitter to transmit both low-frequency signals and high-frequency signals; a receiver coupled to the antenna; and a processing device operatively coupled to the transmitter and the receiver, the processing device to; initiate, through the transmitter, transmission of a wake up command at a predetermined low frequency, the wake up command to activate an RFID tag; and responsive to detection, through the receiver, of the RFID tag beginning to transmit a second signal upon activation, cause the transmitter to transmit a specific command in data sent in a high-frequency signal from the transmitter, wherein the specific command is to cause the RFID tag to perform an action. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification