Method for selecting one or several transponders
First Claim
1. A method for selecting at least one transponder or sensor in RFID or remote sensor systems having a plurality of transponders or sensors with at least one reading device, the method comprising:
- deterministically preselecting individual transponders or sensors by at least one reading device; and
transmitting data for confirming, after preliminary selection of at least one transponder or sensor has taken place, asynchronously from the transponder or sensor to the reading device during at least one protocol segment,wherein the individual transponders or sensors is deterministically preselected based on a bitwise comparison of a unique, statically defined identifying bit sequence with a selection bit sequence transmitted by the reading device.
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Abstract
A method for selecting at least one transponder or a sensor in RFID or remote-sensor systems provided with a plurality of transponders or sensors (tags), in particular in systems provided with a plurality of reading devices, is disclosed. The inventive method includes the feature that in pre-selecting individual transponders or sensors by at least one reading device and, after the successful selection of at least one transponder or sensor, data, in particular for conforming the preselection, is asynchronously transmitted during at least one protocol section from the transponder or sensor to the reading device. The invention makes it possible to efficiently reduce the potentially disturbing control signals of the reading device(s), thereby improving the transmission characteristics of said systems.
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Citations
33 Claims
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1. A method for selecting at least one transponder or sensor in RFID or remote sensor systems having a plurality of transponders or sensors with at least one reading device, the method comprising:
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deterministically preselecting individual transponders or sensors by at least one reading device; and transmitting data for confirming, after preliminary selection of at least one transponder or sensor has taken place, asynchronously from the transponder or sensor to the reading device during at least one protocol segment, wherein the individual transponders or sensors is deterministically preselected based on a bitwise comparison of a unique, statically defined identifying bit sequence with a selection bit sequence transmitted by the reading device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method for controlling a data transmission or an anticollision procedure in RFID or remote sensing systems having a plurality of transponders or sensors,
wherein a command structure transmitted by a reading device to at least one transponder or sensor for transmission of data by the transponder or sensor is executed and stored by the transponder or sensor with additional parameter and/or address extensions, and wherein the stored command structure is executed again following subsequent reception of a repeat command, and wherein the repeat command contains a control symbol to activate a transmission of check symbols together with payload data within individual data bits of the latter, and wherein the method comprises: -
deterministically preselecting individual transponders or sensors by at least one reading device; and transmitting data for confirming, after preliminary selection of at least one transponder or sensor has taken place, asynchronously from the transponder or sensor to the reading device during at least one protocol segment.
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33. A method for controlling a data transmission or an anticollision procedure in RFID or remote sensing systems having a plurality of transponders or sensors,
wherein a command structure transmitted by a reading device to at least one transponder or sensor for transmission of data by the transponder or sensor is executed and stored by the transponder or sensor with additional parameter and/or address extensions, and wherein the stored command structure is executed again following subsequent reception of a repeat command, and wherein the repeat command contains an acknowledgement bit to confirm or discard the preliminary selection of a transponder or sensor, and wherein the method comprises: -
deterministically preselecting individual transponders or sensors by at least one reading device; and transmitting data for confirming, after preliminary selection of at least one transponder or sensor has taken place, asynchronously from the transponder or sensor to the reading device during at least one protocol segment.
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Specification