Optimizing power consumption in a near field communications (NFC) environment
First Claim
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1. A method for optimizing power consumption in a near field communication (NFC) environment, comprising:
- providing, by a first NFC device, a first communications signal including a read command at a first power to a second NFC device to recover a unique identifier (UID) of the second NFC device;
receiving, by the first NFC device, a second communications signal including a response to the read command from the second NFC device;
determining, by the first NFC device, whether a complete UID of the second NFC device has been received;
determining, by the first NFC device in response to the complete UID of the second NFC device not being received, whether the response indicates an overvoltage condition is present in the second NFC device; and
repeating the providing, the receiving, the determining whether the complete UID has been received, and the determining whether the response indicates the overvoltage condition until the complete UID of the second NFC device has been received,wherein for each repetition, the response includes one or more other bits of the UID for each repetition.
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Abstract
An apparatus and method is disclosed to optimize power consumption in a NFC environment. A first NFC capable device provides a polling command to a second NFC capable device. The second NFC capable device provides a response to the polling command. The first NFC capable device provides a read command to the second NFC capable device. The second NFC capable device provides a response to the read command that indicates an overvoltage condition is present. The first NFC capable device adjusts a power level that is to be used to transmit further commands when the overvoltage condition is present.
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Citations
20 Claims
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1. A method for optimizing power consumption in a near field communication (NFC) environment, comprising:
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providing, by a first NFC device, a first communications signal including a read command at a first power to a second NFC device to recover a unique identifier (UID) of the second NFC device; receiving, by the first NFC device, a second communications signal including a response to the read command from the second NFC device; determining, by the first NFC device, whether a complete UID of the second NFC device has been received; determining, by the first NFC device in response to the complete UID of the second NFC device not being received, whether the response indicates an overvoltage condition is present in the second NFC device; and repeating the providing, the receiving, the determining whether the complete UID has been received, and the determining whether the response indicates the overvoltage condition until the complete UID of the second NFC device has been received, wherein for each repetition, the response includes one or more other bits of the UID for each repetition. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for optimizing power consumption in a near field communication (NFC) environment, comprising:
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receiving, by a first NFC device, a first communications signal including a read command at a first power from a second NFC device to recover a unique identifier (UID) of the first NFC device; monitoring, by the first NFC device, the first power to determine whether an overvoltage condition is present; providing, by the first NFC device, a second communications signal including a response to the read command to the second NFC device, the response including one or more bits of the UID and an indication of whether the overvoltage condition is present; and repeating the monitoring and the providing until a complete UID has been provided to the second NFC device, wherein for each repetition, the response includes one or more other bits of the UID. - View Dependent Claims (9, 10, 11, 12, 13, 14, 20)
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15. An apparatus for optimizing power consumption in a near field communication (NFC) environment, comprising:
a demodulator module configured to demodulate a first communications signal including a read command requesting one or more bits of a unique identifier (UID) of the apparatus, and a controller module configured to; monitor a power level of the first communications signal to determine whether an overvoltage condition is present, provide a response to the read command in a second communications signal, the response including one or more bits of the UID and an indication of whether the overvoltage condition is present, and continue to monitor the power level and to provide one or more subsequent responses until a complete UID has been provided, each of the one or more subsequent responses including one or more other bits of the UID and the indication of whether the overvoltage condition is present. - View Dependent Claims (16, 17, 18, 19)
Specification