LPRF device wake up using wireless tag
First Claim
1. A communications method comprising:
- placing a first detectable RFID device having memory onto a pallet,providing a first identification code in the memory to uniquely identify the pallet,using the pallet to transport an object,identifying the object with a second detectable RFID device,producing a second identification code with the second detectable RFID device,copying the second identification code into the memory to indicate a condition of the pallet,transmitting, by the first detectable RFID device, a communication at a first power level such that only a first group of transceivers receive the broadcast, the communication including a command causing each of the first group of transceivers not to respond to a subsequent broadcast; and
subsequent thereto, andtransmitting, by the first detectable RFID device, a communication at a second power level greater than the first power level such that a second group of transceivers greater than and including the first group of transceivers receive the broadcast, but such that only a limited number of transceivers of the second group respond to the broadcast, the limited number of transceivers excluding the first group of transceivers;
wherein the plurality of transceivers each are associated with a respective sensor for acquiring data and transmitting the data to the first detectable RFID device.
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Accused Products
Abstract
A wireless transceiver includes: (a) a low power radio frequency (LPRF) communications component capable of powering down to conserve energy and capable of powering up in response to an electronic signal, the LPRF communications component including a transmitter and a first receiver; and (b) a second receiver that is configured to screen a radio frequency broadcast and provide, on the basis of specific data identified therein, the electronic signal to the LPRF communications component in order to power up the LPRF communications component. The second receiver is adapted to draw less current than the LPRF communications component while awaiting receipt of and listening for a radio frequency broadcast.
181 Citations
17 Claims
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1. A communications method comprising:
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placing a first detectable RFID device having memory onto a pallet, providing a first identification code in the memory to uniquely identify the pallet, using the pallet to transport an object, identifying the object with a second detectable RFID device, producing a second identification code with the second detectable RFID device, copying the second identification code into the memory to indicate a condition of the pallet, transmitting, by the first detectable RFID device, a communication at a first power level such that only a first group of transceivers receive the broadcast, the communication including a command causing each of the first group of transceivers not to respond to a subsequent broadcast; and
subsequent thereto, andtransmitting, by the first detectable RFID device, a communication at a second power level greater than the first power level such that a second group of transceivers greater than and including the first group of transceivers receive the broadcast, but such that only a limited number of transceivers of the second group respond to the broadcast, the limited number of transceivers excluding the first group of transceivers;
wherein the plurality of transceivers each are associated with a respective sensor for acquiring data and transmitting the data to the first detectable RFID device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A communications method comprising:
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placing a first detectable RFID device having memory onto a pallet, providing a first identification code in the memory to uniquely identify the pallet, using the pallet to transport an object, identifying the object with a second detectable RFID device, producing a second identification code with the second detectable RFID device, copying the second identification code into the memory to indicate a condition of the pallet, transmitting, by the first detectable RFID device, a communication at a first power level such that only a first group of transceivers receive the broadcast, the communication including a command causing each of the first group of transceivers not to respond to a subsequent broadcast; and
subsequent thereto, andtransmitting, by the first detectable RFID device, a communication at a second power level greater than the first power level such that a second group of transceivers greater than and including the first group of transceivers receive the broadcast, but such that only a limited number of transceivers of the second group respond to the broadcast, the limited number of transceivers excluding the first group of transceivers; wherein the plurality of transceivers each are associated with a respective sensor for acquiring data and transmitting the data to a server via the first detectable RFID device.
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11. A communications method comprising:
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placing a wireless reader tag (WRT) having memory onto a pallet, providing a WRT ID in the memory to uniquely identify the pallet, using the pallet to transport an object, identifying the object with a wireless tag (WT), producing a WT ID with the WT, copying the WT ID into the memory, transmitting, by the WRT, a communication at a first power level such that only a first group of transceivers receive the broadcast, the communication including a command causing each of the first group of transceivers not to respond to a subsequent broadcast; and
subsequent thereto, andtransmitting, by the WRT, a communication at a second power level greater than the first power level such that a second group of transceivers greater than and including the first group of transceivers receive the broadcast, but such that only a limited number of transceivers of the second group respond to the broadcast, the limited number of transceivers excluding the first group of transceivers; wherein the plurality of transceivers each are associated with a respective sensor for acquiring data and transmitting the data to the WRT.
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12. A communications device for a pallet comprising:
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an RFID tag, said RFID tag having memory for storing a first level identification code to uniquely identify the pallet, a second level identification code to uniquely identify an owner, and a third level identification code to uniquely identify a user, and said codes indicating a condition associated with said pallet, the RFID tag is configured to transmitting a communication at a first power level such that only a first group of transceivers receive the broadcast, the communication including a command causing each of the first group of transceivers not to respond to a subsequent broadcast; and
subsequent thereto;the RFID tag is configured to transmit a communication at a second power level greater than the first power level such that a second group of transceivers greater than and including the first group of transceivers receive the broadcast, but such that only a limited number of transceivers of the second group respond to the broadcast, the limited number of transceivers excluding the first group of transceivers; and the plurality of transceivers each are associated with a respective sensor for acquiring data and transmitting the data to the RFID tag. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification