LPRF DEVICE WAKE UP USING WIRELESS TAG
4 Assignments
0 Petitions
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.
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Citations
55 Claims
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1. (canceled)
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2. A system for tracking and monitoring a plurality of shipping containers by a gateway, the system comprising:
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a particular shipping container including a door that allows access to the inside of the shipping container when the door is open and that denies access to the shipping container when the door is closed; a first wireless reader tag (WRT) that has an identification of the first WRT stored in memory and that is affixable to each of the plurality of shipping containers and that is affixed to and associated with one of the plurality of shipping containers; and a second wireless reader tag (WRT) that is associated with the particular shipping container, that has an identification of the second WRT stored in memory, and that has stored in memory sensor-acquired data that relates to information obtained from a sensor associated with the particular shipping container being tracked and monitored; wherein the first WRT, the second WRT, and the gateway form part of an ad hoc wireless network of the system; wherein the first WRT is in network communication range of the second WRT and is in communication range of the gateway; and wherein the first WRT receives the identification of the second WRT and the sensor-acquired data from the second WRT and communicates to the gateway the identification of the first WRT, the identification of the second WRT, and the sensor-acquired data indicative of a monitored status of the particular shipping container. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A system for tracking and monitoring a shipping container comprising:
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a shipping container that is tracked and monitored, the shipping container including a door that allows access to the inside of the shipping container when the door is open and that denies access to the shipping container when the door is closed; a first radio frequency (RF) device that has an identification of the first RF device stored in memory and that is affixable to the shipping container; and a second radio frequency (RF) device that is associated with the shipping container, that has an identification of the second RF device stored in memory, and that has stored in memory sensor-acquired data that relates to information obtained from a sensor associated with the shipping container being tracked and monitored; wherein the first RF device receives the identification of the second RF device and the sensor-acquired data from the second RF device and communicates to a third radio frequency (RF) device the identification of the first RF device, the identification of the second RF device, and the sensor-acquired data indicative of a monitored status of the shipping container. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. A system for tracking an asset by an RFID reader, the system comprising:
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a mechanism disposed on the asset to allow access to the asset when the mechanism is in a first position and to deny access to the asset when the mechanism is in a second position; a first RFID device having a first identity affixable to the asset; and a second RFID device disposed with the mechanism and comprising a second identity and a measurable parameter indicating whether the mechanism is in the first or second position, wherein the first RFID device receives the second identity and the measurable parameter from the second RFID device and communicates the first and second identity and the measurable parameter to the RFID reader. - View Dependent Claims (49, 50, 51, 52, 53, 54)
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55. A method for asset tracking by a reader comprising the steps of:
- affixing a first RFID device having a first identification to an asset;
affixing a second RFID device having a second identification to the asset, the second identification including behavior information indicating state of the asset; and
communicating the second identification to the first RFID device for subsequent transmission to the reader.
- affixing a first RFID device having a first identification to an asset;
Specification