MULTI-TAG EMULATOR
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Abstract
The invention provides both a system, device and method for emulating a plurality of RF data storage devices in a single device, for example a hand held device such as a mobile phone. The system comprises a means for emulating a plurality of RF data storage devices each having a different identifier, control means for controlling the transmission simultaneously or sequentially of two or more of the identifiers in response to receipt of a signal from a reader, and means for transmitting simultaneously or sequentially two or more of the said identifiers. In one embodiment the transmission of the identifiers emulates the sequential transmission of two or more identifiers in accordance with a collision avoidance protocol. Alternatively or additionally the transmission of the identifiers emulates the simultaneous or sequential transmission of two or more different identifiers in accordance with a collision detection protocol. Preferably each of the identifiers comprises a different modulation sequence or pattern and the transmitted identifiers are generated by combining at least part of the modulation sequence or patterns of the data storage devices.
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Citations
43 Claims
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1-20. -20. (canceled)
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21. An RFID system, said system comprising:
means for emulating a plurality of RF data storage devices each having a different identifier, control means for controlling the transmission simultaneously or sequentially of two or more of the said identifiers in response to receipt of a signal from a reader, and means for transmitting simultaneously or sequentially two or more of the said identifiers. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A method of operating an RFID system comprising the steps of:
- emulating a plurality of RFID tags in a device, the tags each having a different identifier associated therewith; and
simultaneously or sequentially transmitting two or more of said identifiers by the device. - View Dependent Claims (37, 38, 39, 40, 42, 43)
- emulating a plurality of RFID tags in a device, the tags each having a different identifier associated therewith; and
Specification