Wireless charger cross-talk prevention

• US 9,961,483 B1
• Filed: 12/30/2016
• Issued: 05/01/2018
• Est. Priority Date: 12/30/2016
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Berchanskiy, Dmitriy, Rajpal, Nikhil M.
• Primary Examiner(s): Nguyen, Hai V
• Application Number:
  US15/395,366
• Time in Patent Office: 487 Days
• Field of Search: 455 412
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals

Abstract

This disclosure describes systems, methods, and devices related to wireless charger cross-talk prevention system. A power transmitting unit (PTU) may determine a power receiving unit (PRU) of one or more PRUs in proximity to a charging area of the PTU. The PTU may detect a communication link between the PTU and the PRU. The PTU may generate an enhanced message, including one or more identifying information associated with the PTU. The PTU may cause to send the enhanced message to the PRU.

Claims

1. A power transmitting unit (PTU), the PTU comprising memory and processing circuitry configured to:

determine a power receiving unit (PRU) in proximity to a charging area of the PTU;

determine an impedance change associated with a first coil of one or more coils of the PTU;

generate an enhanced message, including one or more identifying information associated with the PTU, wherein the enhanced message is generated by the first coil; and

cause to send the enhanced message to the PRU.

2. The PTU of claim 1, wherein the memory and the processing circuitry are further configured to include an acknowledgment request indication in the enhanced message.

3. The PTU of claim 1, wherein the memory and the processing circuitry are further configured to detect a communication link between the PTU and the PRU.

4. The PTU of claim 3, wherein the communication link is a bluetooth low energy (BLE) communication link, a near field communication (NFC) communication link, an in-band modulation, or a Wi-Fi communication link.

5. The PTU of claim 1, wherein the one or more identifying information includes at least one of a medium access control (MAC), a coil number, or a randomly generated number.

6. The PTU of claim 1, wherein the memory and the processing circuitry are further configured to identify a feedback message from the PRU, the feedback message including a response to the enhanced message.

7. The PTU of claim 6, wherein the memory and the processing circuitry are further configured to:

determine the feedback message includes at least one of the one or more identifying information received in the enhanced message; and

cause to add the PRU to a communication list associated with one or more recognized PTUs.

8. The PTU of claim 7, wherein the memory and the processing circuitry are further configured to:

determine the feedback message does not include the one or more identifying information; and

cause to determine to remove the PRU from the communication list.

9. The PTU of claim 7, wherein the memory and the processing circuitry are further configured to:

determine a feedback message is not received from the PRU after a predetermined time; and

cause to determine to remove the PRU from the communication list.

10. The PTU of claim 1, further comprising a transceiver configured to transmit and receive wireless signals.

11. The PTU of claim 10, further comprising one or more antennas coupled to the transceiver.

12. A non-transitory computer-readable medium storing computer-executable instructions which, when executed by a processor, cause the processor to perform operations comprising:

determining a presence of a power transmitting unit (PTU);

identifying a message received from the PTU on a communication link, wherein the message is generated by a first coil of one or more coils of the PTU;

identifying one or more identifying information associated with the PTU; and

determining a connection status based at least in part, on the one or more identifying information.

13. The non-transitory computer-readable medium of claim 12, wherein the communication link is in accordance with bluetooth low energy (BLE), near field communication (NFC), in-band modulation, or Wi-Fi.

14. The non-transitory computer-readable medium of claim 12, wherein the PTU includes one or more charging coils.

15. The non-transitory computer-readable medium of claim 12, wherein the operations further comprise causing to send a feedback message to the PTU, wherein the feedback message includes the one or more identifying information.

16. The non-transitory computer-readable medium of claim 12, wherein the operations further comprise determining to disconnect the communication link based at least in part on the one or more identifying information.

17. The non-transitory computer-readable medium of claim 15, wherein the feedback message includes at least one of the one or more identifying information.

18. A method comprising:

determining, by one or more processors, a power receiving unit (PRU) in proximity to a charging area of a power transmitting unit (PTU);

determining an impedance change associated with a first coil of one or more coils of the PTU;

generating an enhanced message, including one or more identifying information associated with the PTU, wherein the message is generated by the first coil; and

causing to send the enhanced message to the PRU.

19. The method of claim 18, further comprising identifying a feedback message from the PRU, the feedback message including a response to the enhanced message.

20. The method of claim 19, further comprising:

determining the feedback message includes at least one of the one or more identifying information received in the enhanced message; and

causing to add the PRU to a communication list associated with one or more recognized PTUs.