Method of flagging partial write in RF tags
First Claim
1. A method of sending data from a base station to a radio frequency (RF) transponder (RF tag), the RF tag having a tag non-volatile memory, the tag non-volatile memory, comprising first memory and a second memory, the second memory comprising an "intention to write to memory" field, comprising;
- a) writing information in the second memory;
thenb) writing the data to the first memory;
thenc) checking whether the data was successfully written to the first memory; and
thend) clearing the information from the second memory after successful writing the data to the first memory.
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Accused Products
Abstract
A method, system, and apparatus for sending data from a base station to an RF tag, whereby the RF tag comprises an "intention to write to memory" field, and the "intention to write to memory" field is written before writing the data and cleared after the data is successfully written. If the data transmission is interrupted and partial data is written to the tag, the "intention to write to memory" field will not have been cleared when the tag is checked at a later time through interrogation by a base station.
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Citations
15 Claims
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1. A method of sending data from a base station to a radio frequency (RF) transponder (RF tag), the RF tag having a tag non-volatile memory, the tag non-volatile memory, comprising first memory and a second memory, the second memory comprising an "intention to write to memory" field, comprising;
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a) writing information in the second memory;
thenb) writing the data to the first memory;
thenc) checking whether the data was successfully written to the first memory; and
thend) clearing the information from the second memory after successful writing the data to the first memory. - View Dependent Claims (2, 3, 4, 5)
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6. A method of sending data from a base station to an RF tag having a tag non-volatile memory and
writing the data to an address in a first part of the tag non-volatile memory, comprising; -
a) reserving a second part of the tag non volatile memory as an "intention to write to memory" field; b) encoding the address in the "intention to write to memory" field; c) writing the data to the address in the first part of the tag non-volatile memory; d) checking whether the data is successfully written to the address in the first part of the tag non-volatile memory; and e) clearing the "intention to write to memory" field after successfully writing the data to the address in the first part of the tag non-volatile memory.
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7. An RF tag, the RF Tag having a tag non-volatile memory, comprising;
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a first tag memory, the first tag memory being a first part of the tag non-volatile memory for holding data written to the tag; a second tag memory, the second tag memory being a second part of the tag non-volatile memory comprising an "intention to write to memory field", where the "intention to write to memory field" is written before the data is written to the first tag memory, and where the "intention to write to memory field" is cleared after successfully writing the data to the first tag memory. - View Dependent Claims (8, 9, 10, 11)
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12. A system, comprising;
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a base station; an RF tag, comprising a tag non-volatile memory, the tag non-volatile memory comprising a first memory, the first memory for holding data written to the tag non-volatile memory, the tag non-volatile memory further comprising a second memory, the second memory comprising an "intention to write to memory field", where the "intention to write to memory field" is written before the data is written to the first memory, and where the "intention to write to memory field" is cleared after successfully writing the data to the first memory. - View Dependent Claims (13, 14, 15)
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Specification