Electronic identification system with forward error correction system
First Claim
1. An electronic identification system including:
- an interrogator for transmitting a radio frequency interrogation signal;
a plurality of radio frequency transponders;
each transponder being operative in response to the interrogation signal to respond with a forward error correctable data message including transponder identifying base data encoded as first symbol characters in accordance with a forward error correcting code and first check characters on the transponder identifying base data as defined in the forward error correcting code, and other base data encoded as second symbol characters in accordance with the forward error correcting code and second check characters on the other base data as defined in the forward error correcting code;
the first and second check characters for facilitating reconstruction of the transponder identifying base data and other base data in the event of corruption of the forward error correctable data message during transmission; and
the interrogator including receiver means for receiving the forward error correctable data message; and
data processor means programmed to utilize data relating to the forward error correcting code, the first and second symbol characters and the first and second check characters in the received forward error correctable data message, to reconstruct the transponder identifying base data in the event of corruption of the received forward error correctable data message.
5 Assignments
0 Petitions
Accused Products
Abstract
An electronic radio frequency (RF) identification system 10 is disclosed and claimed. The system includes an interrogator 11 and a plurality of RF transponders 12.1 to 12.n. In use, each transponder is operative in response to an interrogation signal 14 to respond with a forward error correctable data message 16.1 including base data encoded as symbol characters in accordance with a forward error correcting code, such as a Reed Solomon Code, and check characters on the base data as defined in the forward error correcting code. The interrogator 11 utilizes data relating to the forward error correcting code, the symbol characters and check characters in the received forward error correctable data message, to reconstruct the base data in the event of corruption of the forward error correctable data message during transmission.
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Citations
21 Claims
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1. An electronic identification system including:
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an interrogator for transmitting a radio frequency interrogation signal;
a plurality of radio frequency transponders;
each transponder being operative in response to the interrogation signal to respond with a forward error correctable data message including transponder identifying base data encoded as first symbol characters in accordance with a forward error correcting code and first check characters on the transponder identifying base data as defined in the forward error correcting code, and other base data encoded as second symbol characters in accordance with the forward error correcting code and second check characters on the other base data as defined in the forward error correcting code;
the first and second check characters for facilitating reconstruction of the transponder identifying base data and other base data in the event of corruption of the forward error correctable data message during transmission; and
the interrogator including receiver means for receiving the forward error correctable data message; and
data processor means programmed to utilize data relating to the forward error correcting code, the first and second symbol characters and the first and second check characters in the received forward error correctable data message, to reconstruct the transponder identifying base data in the event of corruption of the received forward error correctable data message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An electronic identification system including:
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an interrogator for transmitting a first radio frequency interrogation signal;
a plurality of radio frequency transponders;
each transponder being operative in response to the interrogation signal to respond with a forward error correctable data message including base data in the form of identification code data for the transponder encoded as a first set of symbol characters in accordance with a first forward error correcting code, a first set of check characters on the identification code data as defined in the first forward error correcting code, other base data encoded as a second set of symbol characters in accordance with a second forward error correcting code and a second set of check characters on the other base data as defined in the second forward error correcting code, for facilitating reconstruction of the identification code data and other base data in the event of corruption of the forward error correctable data message during transmission; and
the interrogator including receiver means for receiving the forward error correctable data message; and
data processor means having data relating to the first forward error correcting code, the first set of symbol characters and the first set of check characters in the received forward error correctable data message; and
further having data relating to the second forward error correcting code, the second set of symbol characters and the second set of check characters in the received forward error correctable data message, to reconstruct the identification code data and the other base data respectively, in the event of corruption of the received forward error correctable data message. - View Dependent Claims (16, 17)
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18. A transponder for use with an electronic identification system including an interrogator for transmitting a radio frequency interrogation signal and for receiving a response signal from the transponder, the transponder including
control means; - and
a data memory arrangement into which is programmable data associated with the transponder;
the control means being operative in response to an interrogation signal to utilize the data associated with the transponder to cause the transponder to respond with a forward error correctable data message including base data relating to the transponder encoded as symbol characters in accordance with a forward error correcting code; and
check characters on the base data as defined in the forward error correcting code, for facilitating reconstruction of the base data in the event of corruption of the forward error correctable data message during transmission; and
the forward error correcting code is a Reed-Solomon code. - View Dependent Claims (19, 20)
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21. A method of operating an electronic radio frequency identification system including an interrogator and at least one transponder;
- the method including the steps of;
causing an interrogation signal to be transmitted by the interrogator;
causing the transponder to respond to the interrogation signal with a forward error correctable data message including base data encoded as symbol characters in accordance with a Reed-Solomon forward error correcting code and check characters on the base data as defined in the Reed-Solomon forward error correcting code, for facilitating reconstruction of the base data in the event of corruption of the forward error correctable data message during transmission;
receiving the forward error correctable data message; and
causing an error correction means to utilize data relating to the Reed-Solomon forward error correcting code, the symbol characters and the check characters in the received forward error correctable data message, in order to reconstruct the base data in the event of corruption of the received forward error correctable data message.
- the method including the steps of;
Specification