METHOD AND APPARATUS FOR WIRELESSLY TRANSMITTING ENERGY BASED ON FRAME

• US 20130175873A1
• Filed: 01/03/2013
• Published: 07/11/2013
• Est. Priority Date: 01/10/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: KWON, Ui Kun, KIM, Sang Joon, YOON, Seung keun
• Granted Patent: US 9,774,373 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• 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 5/79 for data transfer in combination with power transfer

Abstract

An apparatus for wirelessly transmitting energy based on a frame is provided. The apparatus includes a transmitter configured to transmit, to at least one reception device, energy in a frame unit through a mutual resonance between a source resonator and a plurality of target resonators, and a controller configured to determine information included in the frame based on whether energy is transmitted to the at least one reception device, or based on whether data is transmitted to the at least one reception device.

Claims

1. An apparatus for wirelessly transmitting energy based on a frame, the apparatus comprising:

a transmitter configured to transmit, to at least one reception device, energy in a frame unit through a mutual resonance between a source resonator and a plurality of target resonators; and

a controller configured to determine information included in the frame based on whether energy is transmitted to the at least one reception device, or based on whether data is transmitted to the at least one reception device.

2. The apparatus of claim 1, wherein the transmitter transmits a second energy frame after maintaining an idle state during a time period of a predetermined inter energy frame space (IEFS) subsequent to transmission of a first energy frame being completed.

3. The apparatus of claim 2, wherein the first energy frame comprises a preamble including advance information used for the at least one reception device to receive the energy frame, an energy frame header (EFH) including control information, and an energy frame body (EFB) including energy transmitted to the at least one reception device.

4. The apparatus of claim 3, wherein the preamble comprises information used to detect the first energy frame, and to estimate a channel through which the energy is transmitted.

5. The apparatus of claim 3, wherein the EFH comprises information on a length of the first energy frame, an identification (ID) of a transmission device that transmits the first energy frame, an ID of a reception device that receives the first energy frame, and an ID of the at least one reception device.

6. The apparatus of claim 2, wherein the controller controls contention for occupying an energy transmission channel among at least one transmission device after the time period of the predetermined IEFS.

7. The apparatus of claim 6, wherein the contention is performed by setting a basic time unit to a slot time, and the slot time corresponds to the predetermined IEFS.

8. The apparatus of claim 3, wherein:

the controller inserts a data frame into an energy frame body in a super-frame structure, and

the transmitter transmits energy and data in a frame unit.

9. The apparatus of claim 8, wherein the transmitter transmits a second data frame after maintaining an idle state during a time period of a predetermined inter data frame space (IDFS) subsequent to transmission of a first data frame being completed within a section of the EFB.

10. The apparatus of claim 9, further comprising:

a receiver configured to receive a response signal from a reception device that receives the first data frame after maintaining an idle state during a time period of the predetermined IDFS.

11. The apparatus of claim 9, wherein the first data frame comprises a start of frame (SoF) indicating a start of the first data frame, a data frame header (DFH) including control information, and a data frame body (DFB) including data information.

12. The apparatus of claim 11, wherein the data frame header comprises information on a length of the first data frame, a type of the first data frame, an ID of a transmission device that transmits the first data frame, an ID of a reception device that receives the first data frame, and a modulation and coding scheme (MCS).

13. The apparatus of claim 9, wherein the controller controls contention for occupying a data transmission channel between a transmission device that transmits the first data frame and a reception device that receives the first data frame after the time period of the predetermined IDFS.

14. The apparatus of claim 13, wherein the contention is performed by setting a basic time unit to a slot time, and the slot time corresponds to the predetermined IDFS.

15. The apparatus of claim 3, further comprising:

a training unit configured to use information included in the preamble to perform a downlink training from a transmission device to a reception device, and an uplink training from the reception device to the transmission device.

16. The apparatus of claim 15, wherein the training unit substantially simultaneously performs the downlink training and the uplink training in response to communication being performed between the transmission device and the reception device in a full duplex scheme.

23. The apparatus of claim 1, wherein the at least one reception device is a plurality of reception devices.

24. The apparatus of claim 1, wherein the at least one target resonator is a plurality of target resonators.

25. The apparatus of claim 6, wherein the controller uses a carrier sense multiple access/collision avoidance (CSMA/CA) to control the contention.

17. An apparatus for wirelessly receiving energy based on a frame, the apparatus comprising:

a receiver configured to receive, from a transmission device, energy in a frame unit through a mutual resonance between a source resonator and a target resonator; and

a controller configured to control an operation of a reception device based on information included in a frame received by the receiver.

18. The apparatus of claim 17, wherein the receiver receives an energy frame in a predetermined minimum inter energy frame space (IEFS).

19. The apparatus of claim 18, wherein the controller comprises:

a detector configured to detect the energy frame based on information included in a preamble of the energy frame;

a channel estimator configured to estimate a channel through which the energy frame is transmitted based on information included in a preamble of the energy frame; and

a synchronization estimator configured to estimate time synchronization of an operation switch of the reception device based on information included in a preamble of the energy frame.

20. The apparatus of claim 17, wherein the receiver receives a data frame in a predetermined minimum inter data frame space (IDFS) within a section of an energy frame body.

21. The apparatus of claim 20, further comprising:

a transmitter configured to transmit a data frame from the reception device to the transmission device after maintaining an idle state during a time period of the predetermined minimum IDFS.

22. A method of wirelessly transmitting energy based on a frame, the method comprising:

transmitting, to at least one reception device, energy in a frame unit through a mutual resonance between a source resonator and at least one target resonator; and

determining information included in the frame based on whether energy is transmitted to the at least one reception device, or based on whether data is transmitted to the at least one reception device.