Data transmission terminal and contactless data/power delivery method for use therewith
First Claim
1. In a data transmission terminal for use in a data transmission system that includes a portable data device that is remotely powered by the terminal, a method of supplying a power signal and an information signal from the terminal to the portable data device via a carrier signal, the method comprising the steps of:
- identifying a slot location within an n-bit modulation frame, wherein the slot location is based on n bits of the information signal and varies between 1 and 2n;
introducing a modulation discontinuity in the slot location to produce an encoded data stream corresponding with the information signal and the power signal; and
transmitting the encoded data stream to the portable data device.
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Accused Products
Abstract
A data transmission system (200) includes a data transmission terminal (201) and a portable data device (203) that is remotely powered by the terminal. A method is provided for supplying power and data from the terminal (201) to the portable data device (203) using a carrier signal (401), including the step of identifying a slot location into which a modulation discontinuity (403-409) is introduced. The slot location is chosen within a modulation frame, which is based on n bits of the information signal to be transmitted, the number of slots in the frame varying between 1 and 2n. The modulation discontinuity (403-409) is introduced into the chosen slot location to produce an encoded data stream, which is then transmitted to the portable data device.
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Citations
37 Claims
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1. In a data transmission terminal for use in a data transmission system that includes a portable data device that is remotely powered by the terminal, a method of supplying a power signal and an information signal from the terminal to the portable data device via a carrier signal, the method comprising the steps of:
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identifying a slot location within an n-bit modulation frame, wherein the slot location is based on n bits of the information signal and varies between 1 and 2n;
introducing a modulation discontinuity in the slot location to produce an encoded data stream corresponding with the information signal and the power signal; and
transmitting the encoded data stream to the portable data device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. In a terminal for use in a data communication system that includes a card that is remotely powered by the terminal, a method of supplying data to the card using a carrier signal, the method comprising the steps of:
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identifying a slot location within an n-bit modulation frame, wherein the slot location is based on n bits of the data and varies between 1 and 2n;
modulating the carrier signal during a time corresponding to the slot location to produce an encoded data stream corresponding with the data; and
transmitting the encoded data stream to the card. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A card reader that transmits a carrier signal to a card, which carrier signal includes a data component and a power component, comprising:
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modulating means for modulating the carrier signal in accordance with the power component and the data component, wherein the carrier signal is modulated during a slot location within an n-bit modulation frame, wherein the slot location is based on n bits of the data stream and varies between 1 and 2n; and
wherein the carrier signal is interrupted within the slot location; and
transmission means for transmitting the modulated carrier signal to the card for reception and use thereby. - View Dependent Claims (18, 19)
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20. In a data transmission terminal for use in a data transmission system that includes a portable data device that is remotely powered by the terminal, a method of supplying power and information from the terminal to the portable data device via a carrier, the method comprising the steps of:
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identifying a slot location within an n-bit modulation frame wherein the slot location is based on n-bits of the information and varies between 1 and 2n, introducing a modulation discontinuity in the slot location to produce an encoded data stream; and
transmitting the encoded data stream to the portable data device. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. In a terminal for use in a data communication system that includes a card that is remotely powered by the terminal, a method of supplying data to the card via a carrier, the method comprising the steps of:
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identifying a slot location within an n-bit modulation frame, wherein the slot location is based on n-bits of the data and varies between 1 and 2n;
modulating the carrier during a time corresponding to the slot location to produce an encoded data stream; and
transmitting the encoded data stream to the card. - View Dependent Claims (30, 31, 32, 33)
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34. A card reader that transmits a carrier to a card, which carrier includes a data component and a power component, comprising:
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a modulator for modulating the carrier in accordance with the data component, wherein the carrier is modulated during a slot location within an n-bit modulation frame, wherein the slot location is based on n-bits of data and varies between 1 and 2n, and wherein the carrier is shifted within the slot location; and
a transmitter for transmitting the modulated carrier to the card. - View Dependent Claims (35, 36, 37)
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Specification