Device, system and method for compensating signal delays in an RFID communication system
First Claim
1. A device for compensating signal delays in an RFID communication system, the device comprising:
- an NFC device coupled to an antenna to receive electromagnetic signals from an RFID reader/writer and to transmit response signals to the RFID reader/writer by modulating received electromagnetic signals, wherein the electromagnetic signals contain first and second characteristic components which define the begin and the end of a predefined signal pattern, wherein the NFC device is configured and arranged to transmit the response signals to the RFID reader/writer after a predefined response delay time, in response to the second characteristic component;
a signal pattern shortening circuit configured and arranged to compensate for signal delays by shortening the signal pattern of the received signal; and
a smart card with contactless card functionality, wherein the NFC device and the smart card are coupled to each other via a protocol converter, the signal pattern shortening circuit being configured and arranged to provide the received signal with the shortened signal pattern to the smart card via the protocol converter.
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Accused Products
Abstract
An RFID communication system comprises an NFC device (11) and a smart card (2) with contactless card functionality, wherein the NFC device (11) and the smart card (2) are couplable to each other via a protocol converter (7), wherein the NFC device (11) is coupled to an antenna (3) to receive electromagnetic signals (ES) from an RFID reader/writer and to transmit response signals (RS) to the RFID reader/writer by modulating received electromagnetic signals (ES). The electromagnetic signals (ES) contain first and second characteristic components (FE, RE) which define the begin and the end of a predefined signal pattern (PA), wherein the second characteristic component triggers a predefined response delay time (FDT) at the expiration of which the RFID communication system has to respond to the RFID reader/writer. A device (12) for compensating signal delays is provided that comprises signal pattern shortening means (13).
20 Citations
18 Claims
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1. A device for compensating signal delays in an RFID communication system, the device comprising:
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an NFC device coupled to an antenna to receive electromagnetic signals from an RFID reader/writer and to transmit response signals to the RFID reader/writer by modulating received electromagnetic signals, wherein the electromagnetic signals contain first and second characteristic components which define the begin and the end of a predefined signal pattern, wherein the NFC device is configured and arranged to transmit the response signals to the RFID reader/writer after a predefined response delay time, in response to the second characteristic component; a signal pattern shortening circuit configured and arranged to compensate for signal delays by shortening the signal pattern of the received signal; and a smart card with contactless card functionality, wherein the NFC device and the smart card are coupled to each other via a protocol converter, the signal pattern shortening circuit being configured and arranged to provide the received signal with the shortened signal pattern to the smart card via the protocol converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An RFID communication system, comprising:
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an NFC device coupled to an antenna to receive electromagnetic signals from an RFID reader/writer and to transmit response signals to the RFID reader/writer by modulating received electromagnetic signals, wherein the electromagnetic signals contain first and second characteristic components which define the begin and the end of a predefined signal pattern, wherein the NFC device is configured and arranged to transmit the response signals to the RFID reader/writer after a predefined response delay time, in response to the second characteristic component; a device for compensating signal delays that includes a signal pattern shortening circuit configured and arranged to generate a signal having a shortened signal pattern, based on the received electromagnetic signals; and a smart card with contactless card functionality, wherein the NFC device and the smart card are coupled to each other via a protocol converter. - View Dependent Claims (10)
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11. A method for compensating signal delays in an RFID communication system, the method comprising:
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receiving electromagnetic signals from an RFID reader/writer by an NFC device coupled to an antenna; compensating for signal delays by generating signals having a shortened signal pattern, from the received electromagnetic signals; and transmitting response signals to the RFID reader/writer by the NFC device by modulating the received electromagnetic signals, wherein the electromagnetic signals contain first and second characteristic components which define the begin and the end of a predefined signal pattern, and by triggering a predefined response delay time based upon the second characteristic component at the expiration of which the RFID communication system transmits the response signals to the RFID reader/writer. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification