LPRF device wake up using wireless tag
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.
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, and
transmitting, 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.
2. A communications method as set forth in claim 1 which includes:
associating the second identification code with the object while the second identification code is retained in the memory.
3. A communications method as set forth in claim 1 which includes:
associating the second identification code with a condition of the pallet.
4. A communications method as set forth in claim 3 which includes:
creating a third identification code, and
storing the third identification code in the memory.
5. A communications method as set forth in claim 1 which includes:
associating the first detectable RFID device with the second detectable RFID device.
6. The communications method of claim 1 , wherein the first detectable RFID device comprises a wireless reader tag, and the first identification code comprises a wireless reader tag identification.
7. The communications method of claim 1 , wherein the second detectable RFID device comprises a wireless tag, and the second identification code comprises a wireless tag identification.
8. The communications method of claim 1 , wherein the second detectable RFID device comprises a wireless reader tag.
9. The communications method of claim 1 , wherein the second identification code comprises a class identification.
10. 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, and
transmitting, 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.
11. A communications method comprising:
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, and
transmitting, 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.
12. A communications device for a pallet comprising:
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.
13. A communications device as set forth in claim 12 in which:
said memory is for storing a fourth level identification code indicative of data obtained by a sensor.
14. A communications device as set forth in claim 12 which includes:
an electronic data communications device for detecting said identification codes, and
said electronic data communications device is configured to communicate over a network with a server.
15. A communications device as set forth in claim 12 in which:
said RFID tag is selected from the group consisting of a passive RFID tag, an active RFID tag, and a semi-passive RFID tag.
16. A communications device as set forth in claim 12 which includes:
said first level identification code, said second level identification code, and said third level identification code being selectively detectable between levels.
17. A communications device as set forth in claim 12 for which:
an association identification code in the memory is modified responsive to a condition change.