Methods and device for controlling power transmission using NFC
First Claim
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1. A method for transferring by an initiator Near Field Communication (NFC) device, power to a target NFC device, the method comprising:
- switching, if an external radio frequency (RF) field is not detected within a predetermined time, an operation mode of the initiator NFC device to an active NFC mode for activating the target NFC device;
transmitting, if a request for transferring power is received from the target NFC device, a command including information on a device verification time interval to the target NFC device;
transferring, if a response to the command is received from the target NFC device, at least a portion of power in the initiator NFC device to the target NFC device; and
verifying the target NFC device at the device verification time interval during the transferring of the at least the portion of the power to the target NFC device,wherein the initiator NFC device transfers power by modifying one or more of a digital protocol, a Logical Link Control Protocol (LLCP), and an application flow control of the initiator NFC device.
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Abstract
A method and system to control power transmission between two Near Field Communication (NFC) devices with and without data transfer using NFC technology are provided. The method includes transferring at least a portion of power between two NFC devices using different RF signals and appropriate NFC Transceivers. The method controls the power transmission between two NFC devices by proposed changes in NFC Digital Protocol, LLCP (Logical Link Control Protocol) and in the application flow control.
8 Citations
15 Claims
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1. A method for transferring by an initiator Near Field Communication (NFC) device, power to a target NFC device, the method comprising:
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switching, if an external radio frequency (RF) field is not detected within a predetermined time, an operation mode of the initiator NFC device to an active NFC mode for activating the target NFC device; transmitting, if a request for transferring power is received from the target NFC device, a command including information on a device verification time interval to the target NFC device; transferring, if a response to the command is received from the target NFC device, at least a portion of power in the initiator NFC device to the target NFC device; and verifying the target NFC device at the device verification time interval during the transferring of the at least the portion of the power to the target NFC device, wherein the initiator NFC device transfers power by modifying one or more of a digital protocol, a Logical Link Control Protocol (LLCP), and an application flow control of the initiator NFC device. - View Dependent Claims (2, 3, 4, 5)
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6. An initiator Near Field Communication (NFC) device for transferring power to a target NFC device, the initiator NFC device comprising:
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an antenna; and a circuit including one or more of an NFC operational components module, a voltage sensing module, a current sensing module, a control module, a regulator module, or a power module, wherein the control module is configured to; switch, if an external radio frequency (RF) field is not detected within a predetermined time, an operation mode of the initiator NFC device to an active NFC mode for activating the target NFC device; transmit, if a request for transferring power is received from the target NFC device, a command including information on a device verification time interval to the target NFC device; transfer, if a response to the command is received from the target NFC device, at least a portion of power in the initiator NFC device to the target NFC device using the antenna, and verify the target NFC device at the device verification time interval during the transferring of the at least the portion of the power to the target NFC device, wherein the initiator NFC device transfers power by modifying one or more of a digital protocol, a Logical Link Control Protocol (LLCP), and an application flow control of the initiator NFC device. - View Dependent Claims (7, 8, 9)
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10. A target Near Field Communication (NFC) device for receiving power transferred from an initiator NFC device, the target device comprising:
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an antenna; and a circuit including one or more of an NFC operational components module, a voltage sensing module, a current sensing module, a control module, a regulator module, or a power module, wherein the control module is configured to; transmit, to the initiator NFC device, a request for transferring power; receive a command including information on a device verification time interval from the initiator NFC device; transmit, to the initiator NFC device, a response to the command; and receive the power from the initiator NFC device using the antenna, wherein the target NFC device is verified, by the initiator NFC device, at the device verification time interval during receiving the power, and wherein the target NFC device receives the power from the initiator NFC device by modifying one or more of a digital protocol, an LLCP, and an application flow control of the target NFC device. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification