Radio-frequency identification (RFID) tag-to-tag autoconnect discovery, and related methods, circuits, and systems
First Claim
1. A method of automatically detecting a connection between a plurality of radio-frequency identification (MD) tags, comprising:
- periodically placing a charge by a first RFID tag on a node shared between the first RFD tag of the plurality of RFID tags and a second RFID tag of the plurality of RFID tags;
sensing a voltage at the node by the first RFID tag at a time subsequent to the placing of the charge; and
automatically determining by the first RFD tag whether a connection exists between the first RFID tag and the second RFID tag based on the sensing of the voltage at the node.
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Accused Products
Abstract
Methods, circuits, and systems are disclosed for automatically detecting connections between RFID tags. In one embodiment, a method is provided that includes periodically placing a charge on a node shared between a first RFID tag and a second RFID tag. The method also comprises sensing a voltage at the node at a time subsequent to the placing of the charge. The method also comprises automatically determining whether a connection exists between the first RFID tag and the second RFID tag based on the sensing of the voltage at the node. The first RFID tag and/or the second RFID tag may include circuitry configured to perform the method.
241 Citations
35 Claims
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1. A method of automatically detecting a connection between a plurality of radio-frequency identification (MD) tags, comprising:
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periodically placing a charge by a first RFID tag on a node shared between the first RFD tag of the plurality of RFID tags and a second RFID tag of the plurality of RFID tags; sensing a voltage at the node by the first RFID tag at a time subsequent to the placing of the charge; and automatically determining by the first RFD tag whether a connection exists between the first RFID tag and the second RFID tag based on the sensing of the voltage at the node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A circuit on a first radio-frequency identification (RFID) tag for automatically detecting a connection between the first RFID tag and a second RFID tag comprising circuitry configured to:
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periodically place a charge on a node shared between the first RFID tag of a plurality of RFID tags and the second RFID tag; sense a voltage at the node at a time subsequent to the placing of the charge; and automatically determine whether a connection exists between the first RFID tag and the second RFID tag based on the sensing of the voltage at the node. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A system for automatically detecting a connection between a plurality of radio-frequency identification (RFID) tags comprising:
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a first RFID tag; and a second RFID tag, wherein at least one of the first RFID tag and the second RFID tag comprises circuitry configured to; periodically place a charge on a node shared between a first RFID tag of a plurality of RFID tags and a second RFID tag of the plurality of RFID tags; sense a voltage at the node at a time subsequent to the placing of the charge; and automatically determine whether a connection exists between the first RFID tag and the second RFID tag based on the sensing of the voltage at the node.
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32. A circuit on a first radio-frequency identification (RFID) tag for automatically detecting a connection status between the first RFID tag and a second RFID tag comprising circuitry configured to:
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periodically place a charge on a node shared between the first RFID tag and the second RFID tag; sense a voltage at the node at a time subsequent to the placing of the charge; and determine a connection status between the first RFID tag and the second RFID tag based on the sensing of the voltage at the node, wherein the connection status between the first RFID tag and the second RFID tag comprises not connected, connected and not powered, and connected and powered. - View Dependent Claims (33, 34, 35)
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Specification