System and Method to Record Environmental Condition on an RFID Tag
First Claim
1. A method of recording temperature on RFID tags said method comprising:
- attaching a first RFID tag to a container, said first RFID tag including a temperature sensor, said container containing a plurality of packages, each of a plurality of second RFID tags attached to a respective one of said plurality of packages; and
responsive to said first RFID tag transmitting temperature information to said plurality of second RFID tags, said plurality of second RFID tags recording said temperature information.
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Accused Products
Abstract
System and method for recording temperature on an RFID tag. A first RFID tag is attached to a container. The first RFID tag includes a temperature sensor. The container contains a multiplicity of packages. A multiplicity of second RFID tags are attached to the multiplicity of packages, respectively. The first RFID tag transmits temperature information to the multiplicity of second RFID tags. In response, the multiplicity of second RFID tags record the temperature information. Consequently, there is no need for expensive temperature sensors on the multiplicity of RFID tags on the packages. According to features of the present invention, the first RFID tag is an active RFID tag, and the multiplicity of second RFID tags are passive RFID tags. The first RFID tag also transmits other information to the multiplicity of second RFID tags to enable the second RFID tags to authenticate the temperature information. Other types of environmental sensors such as a humidity sensor or vibration sensor can substitute for the temperature sensor.
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Citations
20 Claims
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1. A method of recording temperature on RFID tags said method comprising:
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attaching a first RFID tag to a container, said first RFID tag including a temperature sensor, said container containing a plurality of packages, each of a plurality of second RFID tags attached to a respective one of said plurality of packages; and
responsive to said first RFID tag transmitting temperature information to said plurality of second RFID tags, said plurality of second RFID tags recording said temperature information. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An assembly for recording temperature on an RFID tag, said assembly comprising:
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a container with a first RFID tag attached to said container, said first RFID tag including a temperature sensor, said container containing a multiplicity of packages, a multiplicity of second RFID tags attached to said multiplicity of packages, respectively; and
means within said first RFID tag for transmitting temperature information to said multiplicity of second RFID tags, and means, responsive to said transmission, within said multiplicity of second RFID tags for recording said temperature information;
means for storing a shared secret in said first RFID tag and said multiplicity of second RFID tags;
said first RFID tag also including means for transmitting to said multiplicity of second RFID tags a transmitted hash value based on said shared secret stored in said first RFID tag and said temperature information which is transmitted;
said multiplicity of second RFID tags including means for independently computing a hash value based on said shared secret stored in said multiplicity of second RFID tags and said temperature information received from said first RFID tag, and if the transmitted hash value matches said independently computed hash value, said multiplicity of second RFID tags recording said temperature information, and if the transmitted hash value does not match said independently computed hash value, said multiplicity of second RFID tags not recording said temperature information. - View Dependent Claims (8, 9, 11, 12)
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10. (canceled)
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13. A method of recording an environmental condition on RFID tags, said method comprising:
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attaching a first RFID tag to a container, said first RFID tag including an environmental condition sensor, said container containing a plurality of packages, each of a plurality of second RFID tags attached to a respective one of said plurality of packages; and
responsive to said first RFID tag transmitting environmental information to said plurality of second RFID tags, said plurality of second RFID tags recording said environmental information. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification