Method for data transmission in RFID or remote sensor systems
AssigneeAtmel Automotive GmbH
InventorUlrich Friedrich
Life of this patent
Estimating the term…
Abstract
A method and apparatus for transmitting data in a radio frequency identification system, which includes a reader and at least one transponder, is provided. The reader transmits data sequences to the transponder including at least command data, associated check data, and a subsequent return link header data. Upon receiving unrecognized command data and/or unsupported parameter and address data the transponder notifies the reader of this condition. The notification takes place at times when the reader transmits end signals indicating an end of a data sequence, transmits an optional parameter and address data, or transmits the return link header data. Thus, communication between the reader and other transponders is not disrupted when a transponder cannot execute a command.
Claims23
A method for transmitting data in a radio frequency identification system having a reader and at least one transponder, or for transmitting data between a reader and a remote sensor, the method comprising:
- transmitting a data sequence from the reader to the transponder or the remote sensor, the data sequence including command data accompanied by associated check data and/or parameter and address data accompanied by correct check data, and return link header data for providing a return link from the transponder or the remote sensor to the reader;
- determining by the transponder or the remote sensor of an unrecognized command data and/or unsupported parameter and address data accompanied in each case by correct check data;
- and
- notifying the reader of the unrecognized command data and/or unsupported parameter and address data while the reader transmits end signals indicating an end of the data sequence or an end of the parameter and address data, or while the return link header data is transmitted.
A transponder comprising:
- an antenna;
- and
- an integrated circuit being electrically connected to the antenna,
- wherein the transponder receives by the antenna at least a transmitted data sequence, the transmitted data sequence including an end of data portion and a return link header portion,
- wherein, upon detection of an unrecognized command data and/or unsupported parameter and address data accompanied in each case by correct check data, an unrecognized command code is transmitted during receipt of the end of data portion or the return link header portion, and
- wherein when no unrecognized command data and/or unsupported parameter and address data is detected, the transponder transmits data after receipt of the return link header portion.
Dependencies are inferred from the claim text.