Active ID tags for increased range and functionality
First Claim
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1. An RFID assembly, comprising:
- a first part, which includes a unique address indicative of an RFID tag and RFID information associated with said RFID tag;
a second, RFID modem, associated with said first part, which both receives first information from other RFID modems and also sends information in response to an interrogation directed to said unique address;
wherein said RFID modem sending said first information received from other RFID modems, and also sending said RFID information—
in response to an interrogation; and
wherein said RFID modem carrying out a probabilistic routing that determines, when said second RFID modem receives a message from at least one other RFID modem, a distance between said second RFID modem, and said at least one other RFID modem, and where said second RFID modem calculates, based on said distance, a probable signal strength to said at least one other RFID modem, a propagation and a transmission power to said at least one other RFID modem, and wherein said probabilistic routing determines a probability of successful transmission to said at least one other RFID modem to determine whether to rebroadcast the message based on said probable signal strength, propagation and transmission power.
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Abstract
An RFID tag that uses multiple components to both receive and send information.
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Citations
14 Claims
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1. An RFID assembly, comprising:
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a first part, which includes a unique address indicative of an RFID tag and RFID information associated with said RFID tag; a second, RFID modem, associated with said first part, which both receives first information from other RFID modems and also sends information in response to an interrogation directed to said unique address; wherein said RFID modem sending said first information received from other RFID modems, and also sending said RFID information—
in response to an interrogation; andwherein said RFID modem carrying out a probabilistic routing that determines, when said second RFID modem receives a message from at least one other RFID modem, a distance between said second RFID modem, and said at least one other RFID modem, and where said second RFID modem calculates, based on said distance, a probable signal strength to said at least one other RFID modem, a propagation and a transmission power to said at least one other RFID modem, and wherein said probabilistic routing determines a probability of successful transmission to said at least one other RFID modem to determine whether to rebroadcast the message based on said probable signal strength, propagation and transmission power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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on an RFID tag, receiving information from other RF tags; and sending both information from other RFID tags, and also information indicative of the RFID tag'"'"'s own information; and wherein said sending comprising a probabilistic routing that determines, when said RFID tag receives a message from at least one other RFID tag, a probable distance between said RFID tag and said at least one other RFID tag, and where said RFID tag calculates, based on said distance, a probable signal strength to said at least one other RFID tag, a propagation and a transmission power to said at least one other RFID tag, and wherein said probabilistic routing determines a probability of successful transmission to said at least one other RFID tag to determine whether to rebroadcast the message based on said probable signal strength, propagation and transmission power. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification