Wireless power transfer with improved device identification and signaling link security
First Claim
1. A Power Receiving Unit (PRU) for wireless power transfer to a device, said PRU comprising:
- receive resonator circuitry to receive power from a Power Transmitting Unit (PTU) over an inductive resonant coupling link, said power provided for said wireless power transfer, wherein said power is further modulated to provide a first type of signaling between said PRU and said PTU over said resonant coupling link;
signaling link communication circuitry to provide a second type of signaling between said PRU and said PTU over a wireless communication link; and
controller circuitry to;
receive a random number, generated by said PTU, over said resonant coupling link;
determine an encoded response based on said random number and on an identifier associated with said PRU (PRU_ID); and
transmit said encoded response to said PTU over said wireless communication link, for verification by said PTU.
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Accused Products
Abstract
Generally, this disclosure provides systems, devices, methods and computer readable media for wireless power transfer with improved device identification and signaling security. A Power Receiving Unit (PRU) may include a receive resonator module to receive power from a Power Transmitting Unit (PTU) over an inductive resonant coupling link. The power may be modulated to provide signaling between the PRU and the PTU over the resonant coupling link. The PRU may also include a signaling link communication module to provide a second type of signaling between the PRU and the PTU over a wireless communication link. The PRU may further include a controller module to receive a random number, generated by the PTU, over the resonant coupling link; calculate an encoded response based on the random number and on an identifier of the PRU; and transmit the encoded response to the PTU over the wireless communication link, for verification by the PTU.
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Citations
25 Claims
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1. A Power Receiving Unit (PRU) for wireless power transfer to a device, said PRU comprising:
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receive resonator circuitry to receive power from a Power Transmitting Unit (PTU) over an inductive resonant coupling link, said power provided for said wireless power transfer, wherein said power is further modulated to provide a first type of signaling between said PRU and said PTU over said resonant coupling link; signaling link communication circuitry to provide a second type of signaling between said PRU and said PTU over a wireless communication link; and controller circuitry to; receive a random number, generated by said PTU, over said resonant coupling link; determine an encoded response based on said random number and on an identifier associated with said PRU (PRU_ID); and transmit said encoded response to said PTU over said wireless communication link, for verification by said PTU. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A Power Transmitting Unit (PTU) to provide wireless power transfer through a Power Receiving Unit (PRU) of a device, said PTU comprising:
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transmit resonator circuitry to transmit power to said PRU over an inductive resonant coupling link, said power provided for said wireless power transfer, wherein said power is further modulated to provide a first type of signaling between said PTU and said PRU over said resonant coupling link; signaling link communication circuitry to provide a second type of signaling between said PTU and said PRU over a wireless communication link; and controller circuitry to; generate a random number for transmission to said PRU over said resonant coupling link; receive an encoded response and an identifier associated with said PRU (PRU_ID) from said PRU over said wireless communication link, wherein said encoded response based on said random number and on said PRU_ID; determine a second encoded response based on said random number and said received PRU_ID; and verify that said received encoded response matches said determined second encoded response. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method for improving security of a Power Receiving Unit (PRU) for wireless power transfer to a device, said method comprising:
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receiving power, for said wireless power transfer, from a Power Transmitting Unit (PTU) over an inductive resonant coupling link, wherein said power is modulated to provide a first type of signaling between said PRU and said PTU over said resonant coupling link; establishing a second type of signaling between said PRU and said PTU over a wireless communication link; receiving a random number, generated by said PTU, over said resonant coupling link; determining an encoded response based on said random number and on an identifier associated with said PRU (PRU_ID); and transmitting said encoded response to said PTU over said wireless communication link, for verification by said PTU. - View Dependent Claims (17, 18, 19, 20)
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21. A non-transitory computer-readable storage device having instructions stored thereon which when executed by a processor result in the following operations for improving security of a Power Receiving Unit (PRU) for wireless power transfer to a device, said operations comprising:
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receiving power, for said wireless power transfer, from a Power Transmitting Unit (PTU) over an inductive resonant coupling link, wherein said power is modulated to provide a first type of signaling between said PRU and said PTU over said resonant coupling link; establishing a second type of signaling between said PRU and said PTU over a wireless communication link; receiving a random number, generated by said PTU, over said resonant coupling link; determining an encoded response based on said random number and on an identifier associated with said PRU (PRU_ID); and transmitting said encoded response to said PTU over said wireless communication link, for verification by said PTU. - View Dependent Claims (22, 23, 24, 25)
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Specification