RFID tag with occupancy status recall
First Claim
1. An RFID tag comprisinga user input anda visual tag status indicatorwherein said user input changes status of the tag and said status is indicated by the tag status indicator when said status is changed, said status being a portion of a data signal sent to a tag interrogator when said tag is interrogated.
4 Assignments
0 Petitions
Accused Products
Abstract
An RFID tag for use in a vehicle for use in an electronic toll collecting system. The tag is capable of transmitting data to a tag interrogator indicating the occupancy status of the vehicle. In an embodiment, the tag has a user input and a visual and audible tag status indicator. The user input is used to change the occupancy status of the tag, wherein the occupancy status is a portion of a message sent by radio frequency to the interrogator when the vehicle passes through a toll area. In an embodiment the tag has memory for storage of said tag status and the user input can be used to cause the tag to indicate a stored tag status. In a further embodiment, the tag reverts to a default status after a predetermined period of time.
23 Citations
19 Claims
-
1. An RFID tag comprising
a user input and a visual tag status indicator wherein said user input changes status of the tag and said status is indicated by the tag status indicator when said status is changed, said status being a portion of a data signal sent to a tag interrogator when said tag is interrogated.
-
12. A method of operating an RFID tag having a tag status and a user input comprising:
-
manually changing said tag status from default to user status using said user input; transmitting data including status indicating user status to a first RFID reader and recording a time stamp; interrogating the tag at a second RFID reader comparing current time at said second RFID reader with said time stamp and transmitting data from the RFID tag including status indicating user status if the difference between said current time and said time stamp is less than a predetermined threshold and transmitting data from the RFID tag including status indicating default status if the difference between said current time and said time stamp is greater than or equal to said predetermined threshold. - View Dependent Claims (13, 14, 15, 16)
-
-
17. A method of operating an RFID tag having a user-settable status, a status indicator and a user input comprising:
-
setting the user-settable status a first time with the user input; storing said status set the first time in a first memory location; setting the user-settable status a second time with the user input; storing said status set the second time in a second memory location; transmitting said status to a tag reader after at least one of said first or second setting; and recalling said first and second status settings sequentially and indicating said first and second status settings on the status indicator. - View Dependent Claims (18, 19)
-
Specification