WIRELESS POWER TRANSMISSION SYSTEM AND METHOD BASED ON TRANSMISSION SCHEDULE

• US 20160028443A1
• Filed: 04/14/2015
• Published: 01/28/2016
• Est. Priority Date: 07/23/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Sang Joon, KWON, Ui Kun, TAROKH, Vahid
• Granted Patent: US 10,567,038 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• 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 5/24 Inductive coupling
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A wireless power transmission system and method thereof are provided. A power transmission apparatus includes a processor configured to classify reception (RX) nodes into a subset, and to determine a transmission schedule based on the subset; and a transmission (TX) resonator configured to wirelessly transmit energy to an RX node corresponding to the subset, based on the transmission schedule.

Claims

1. A power transmission apparatus, comprising:

a processor configured to classify reception (RX) nodes into a subset, and to determine a transmission schedule based on the subset; and

a transmission (TX) resonator configured to wirelessly transmit energy to an RX node corresponding to the subset, based on the transmission schedule.

2. The power transmission apparatus of claim 1, wherein the TX resonator is configured to wirelessly transmit energy to each of subsets in an order during a transmission period based on the transmission schedule.

3. The power transmission apparatus of claim 1, wherein the processor is configured to assign a time interval to the subset, based on the transmission schedule.

4. The power transmission apparatus of claim 3, wherein the TX resonator is configured to wirelessly transmit energy to the RX node during the predetermined time interval.

5. The power transmission apparatus of claim 1, wherein the processor is configured to classify the RX node with a mutual coupling coefficient equal to or less than a predetermined threshold among the RX nodes as the subset.

6. The power transmission apparatus of claim 1, wherein the processor is configured to collect channel information associated with coupling between the RX nodes.

7. The power transmission apparatus of claim 6, wherein the TX resonator is configured to transmit energy to another RX node of the RX nodes designated as a temporary subset, and

wherein the processor is configured to collect, from the another RX node, channel information estimated based on the energy transmitted to the temporary subset.

8. The power transmission apparatus of claim 7, wherein the processor is configured to generate a coupling coefficient matrix from the collected channel information, and to classify the RX nodes as the subset, based on the coupling coefficient matrix.

9. The power transmission apparatus of claim 1, wherein the TX resonator is configured to wirelessly transmit energy to another RX node designated as a temporary subset, and

wherein the processor is configured to estimate a transmission efficiency for the temporary subset, based on a TX energy waveform corresponding to the energy, and to determine the transmission schedule, based on the transmission efficiency.

10. The power transmission apparatus of claim 1, wherein the processor is configured to determine a time interval assigned to the subset during a transmission period.

11. A power reception apparatus, comprising:

a processor configured to determine a subset of the power reception apparatus, based on a transmission schedule; and

a reception (RX) resonator configured to wirelessly receive energy corresponding to the subset from a transmission (TX) node.

12. The power reception apparatus of claim 11, wherein the RX resonator is configured to wirelessly receive energy from the TX node during a time interval corresponding to the subset including the power reception apparatus.

13. The power reception apparatus of claim 11, wherein the processor is configured to assign a predetermined time interval in which the power reception apparatus is to receive energy from the TX node, based on the transmission schedule.

14. The power reception apparatus of claim 11, further comprising:

a communicator configured to receive announcement information associated with the subset from the TX node.

15. The power reception apparatus of claim 11, further comprising:

a communicator configured to transmit channel information associated with coupling between the power reception apparatus and an RX node to the TX node, wherein the TX node uses the channel information to determine the transmission schedule.

16. The power reception apparatus of claim 15, wherein the RX resonator is configured to receive energy from the TX node, in response to the power reception apparatus being designated as a temporary subset, and

wherein the processor is configured to estimate the channel information based on the energy.

17. The power reception apparatus of claim 16, wherein the processor is configured to analyze an RX energy waveform corresponding to the received energy, and to estimate channel information associated with a neighboring RX node designated as the temporary subset.

18. The power reception apparatus of claim 11, further comprising:

a communicator configured to transmit to the TX node channel information comprising a result obtained by determining whether a neighboring RX node coupled with the power reception apparatus exists,

wherein the processor is configured to generate the channel information.

19. The power reception apparatus of claim 18, wherein, in response to a mutual coupling coefficient corresponding to an RX energy waveform being greater than a threshold, the processor is configured to determine that the power reception apparatus is coupled with a neighboring RX node designated as the temporary subset.

20. The power reception apparatus of claim 11, further comprising:

a communicator configured to transmit to the TX node channel information between the power reception apparatus and an RX node adjacent to the power reception apparatus, wherein the processor is configured to transmit energy to the RX node and to estimate the channel information.