LOW POWER RFID READER THAT GIVES VISIBILITY TO PASSIVE TAGS AS ACTIVE TAGS USING LOW POWER 802.11
First Claim
Patent Images
1. A radio frequency identification (RFID) system comprising:
- at least one RFID passive tag configured to receive a substantially continuous charging radio frequency (RF) signal and transmit a substantially continuous identifier signal in response to receiving the substantially continuous charging RF signal; and
an RFID reader configured to transmit the substantially continuous charging RF signal and receive the substantially continuous identifier signal, wherein the at least one RFID passive tag is visible as an RFID active tag to the RFID reader when transmitting the substantially continuous identifier signal.
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Abstract
Apparatus, systems, and methods for enabling a radio frequency identification (RFID) passive tag to be visible as an RFID active tag over an extended period of time are disclosed. An RFID reader transmits a substantially continuous radio frequency (RF) charging signal. In response to receiving the RF charging signal, one or more RFID passive tags each transmit a substantially continuous identifier signal. The RFID reader is configured to receive the identifier signal(s) and to determine a location and/or asset associated with each RFID passive tag.
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Citations
22 Claims
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1. A radio frequency identification (RFID) system comprising:
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at least one RFID passive tag configured to receive a substantially continuous charging radio frequency (RF) signal and transmit a substantially continuous identifier signal in response to receiving the substantially continuous charging RF signal; and an RFID reader configured to transmit the substantially continuous charging RF signal and receive the substantially continuous identifier signal, wherein the at least one RFID passive tag is visible as an RFID active tag to the RFID reader when transmitting the substantially continuous identifier signal. - View Dependent Claims (2, 3, 4)
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5. A method for enabling a radio frequency identification (RFID) passive tag to be visible as an RFID active tag, the method comprising the steps of:
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transmitting, by an RFID reader, a substantially continuous charging radio frequency (RF) signal to at least one RFID passive tag; and receiving, by the RFID reader, a substantially continuous identifier signal from the at least one RFID passive tag in response to transmitting the charging RF signal, wherein the transmitting and receiving steps occur over an extended period of time to identify one of a location of and a asset associated to the at least one RFID passive tag. - View Dependent Claims (6)
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7. A method for enabling an RFID passive tag to be visible as an RFID active tag, the method comprising the steps of
transmitting, by an RFID reader, a substantially continuous charging RF signal; -
receiving, by a first RFID passive tag, the substantially continuous charging RF signal; and transmitting, by the first RFID passive tag, a first substantially continuous identifier signal in response to receiving the substantially continuous charging RF signal. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A radio frequency identification (RFID) reader comprising:
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a signal generator configured to generate a substantially continuous radio frequency (RF) charging signal; an antenna coupled to the signal generator, the antenna configured to transmit the substantially continuous RF charging signal and to receive a first substantially continuous identifier signal from a first RFID passive device; and a module coupled to the antenna, the module configured to determine one of a first location of the first RFID passive device and a first asset type associated with the first RFID passive device based on the first substantially continuous identifier signal. - View Dependent Claims (20)
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21. A method for enabling a radio frequency identification (RFID) passive tag to be visible as an RFID active tag, the method comprising the steps of:
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receiving, by an RFID passive tag, a substantially continuous charging radio frequency (RF) signal from at least one RFID reader; and transmitting, by the RFID passive tag, a substantially continuous identifier signal to the at least one RFID reader in response to receiving the substantially continuous charging RF signal, wherein the receiving and transmitting steps occur over an extended period of time to enable a location of the RFID passive tag to be determined. - View Dependent Claims (22)
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Specification