Method and system for integrated wireless power and data communication

• US 8,401,595 B2
• Filed: 06/23/2009
• Issued: 03/19/2013
• Est. Priority Date: 12/08/2008
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Zhu, Chunhui, Ngo, Chiu
• Primary Examiner(s): Aminzay, Shaima Q
• Application Number:
  US12/490,222
• Publication Number:
  US 20100142509A1
• Time in Patent Office: 1,365 Days
• Field of Search: 455/574, 455/522, 455/572, 455/573, 455/127.1, 455/67.11, 455/69, 455/41.2, 370/235, 370/310, 370/311, 370/318, 370/343, 320/137, 307/66, 713/320
• US Class Current: 455/574
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• 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 1/1607 Supply circuits converters H02M; filters therefor H02M1/14; voltage stabilisers G05F1/46

Abstract

A method and system of integrated wireless power and data transmission in a wireless device having a data communication circuit for wireless data communication and a power reception circuit including a charge storage unit. The wireless device is tuned to receive wireless RF signals in a certain frequency band via an antenna. Switching between power reception mode and data communication mode is detected. Received RF signal electrical charge is selectively distributed to the power reception circuit and/or the data communication circuit based on the switching mode and/or strength of the RF signal.

Claims

1. A method of integrated wireless power and data transmission, the method comprising, in a wireless device comprising a data communication circuit for wireless data communication and a power reception circuit including a charge storage unit:

tuning to receive wireless RF signals in a certain frequency band via an antenna;

a switching mode that includes switching between power reception mode and data communication mode; and

selectively distributing received RF signal electrical charge to the power reception circuit and/or the data communication circuit based on the switching mode and/or strength of the RF signal, wherein distributing received RF signal electrical charge is adaptive as a function of at least one of switching mode and strength of the RF signal.

2. The method of claim 1 wherein selectively distributing received RF signal electrical charge further comprises, in power reception mode distributing received RF signal electrical charge to the power reception circuit only to charge the charge storage unit.

3. The method of claim 2 further including turning the data communication circuit off.

4. The method of claim 2 wherein selectively distributing received RF signal electrical charge further comprises, in data communication mode:

determining strength of the RF signal; and

if the RF signal strength is less than a threshold, then distributing the RF signal electrical charge to the data communication circuit only to operate the data communication circuit.

5. The method of claim 4 further including turning the power reception circuit off.

6. The method of claim 4 wherein selectively distributing received RF signal electrical charge in data communication mode further comprises:

if the RF signal strength is greater than a threshold, then splitting distribution of the RF signal electrical charge between the data communication circuit and the power reception circuit.

7. The method of claim 6 wherein in data communication mode splitting distribution of the RF signal electrical charge further comprises splitting distribution of the RF signal electrical charge between the data communication circuit and the power reception circuit such that received RF signal electrical charge in excess of data communication circuit operational needs is distributed to the power reception circuit to charge the charge storage unit.

8. The method of claim 1 further comprising:

generating control signals for switching the wireless device between a power reception mode and a data communication mode, the control signals providing switching information including information about which of the modes to switch to, and information about timing of the switching;

wherein in the data communication mode, the wireless device processes an RF transmission from a sending wireless device as a data communication, and in the power reception mode the receiving wireless device processes the RF transmission as energy radiation.

9. The method of claim 1 wherein the wireless device comprises multiple antennas, such that one or more of the multiple antennas are used for data communication while one or more other antennas of the multiple antennas are used for power transmission/reception, simultaneously.

10. The method of claim 1 wherein the wireless device comprises multiple antennas, such that the multiple antennas operate for data communication or power transmission/reception, at a time.

11. The apparatus of claim 10 wherein the split control module is further configured for, in power reception mode, distributing received RF signal electrical charge to the power reception circuit only to charge the charge storage unit.

12. The apparatus of claim 11 further comprising a power control module configured for turning the data communication circuit off.

13. The apparatus of claim 11 further comprising a signal strength detector configured for detecting the strength of the received RF signal, wherein the split control module is further configured for, in data communication mode, if the RF signal strength is less than a threshold, then distributing the RF signal electrical charge to the data communication circuit only to operate the data communication circuit.

14. The apparatus of claim 13 further comprising a power control module configured for turning the power reception circuit off.

15. The apparatus of claim 13 wherein the split control module is further configured for, in data communication mode, if the RF signal strength is greater than a threshold, then splitting distribution of the RF signal electrical charge between the data communication circuit and the power reception circuit.

16. The apparatus of claim 15 wherein the split control module is further configured for, in data communication mode, splitting distribution of the RF signal electrical charge between the data communication circuit and the power reception circuit such that received RF signal electrical charge in excess of data communication circuit operational needs is distributed to the power reception circuit to charge the charge storage unit.

17. The method of claim 1, wherein transmission power of the wireless RF signals comprises radio waves.

18. The method of claim 1, wherein upon the RF data signal being greater than a selected threshold based on sensitivity of the data communication circuit, the RF splitter distributes the received energy between the power reception circuit and the data communication circuit.

19. The method of claim 18, wherein received RF power in excess of operation of the data communication circuit requirements is used for charging the charge storage unit.

20. The method of claim 1, wherein distributing received RF signal electrical charge is adaptive based on strength of the received RF signal and power requirement of the data communication circuit.

21. An apparatus for integrated wireless power and data transmission using radio frequency (RF) signals in a wireless network, comprising:

a tuner for tuning to receive wireless RF signals in a certain frequency band via an antenna;

a detection module configured for a switching mode that includes switching between power reception mode and data communication mode; and

a split control module configured for selectively distributing received RF signal electrical charge to a power reception circuit and/or a data communication circuit based on the switching mode and/or strength of the RF signal, wherein distributing received RF signal electrical charge is adaptive as a function of at least one of switching mode and strength of the RF signal.

22. The apparatus of claim 21 further comprising:

a controller function configured for generating control signals for switching the wireless device between a power reception mode and a data communication mode, the control signals providing switching information including information about which of the modes to switch to, and information about timing of the switching;

wherein in the data communication mode, the receiving wireless device processes an RF transmission from a sending wireless device as a data communication, and in the power reception mode the receiving wireless device processes the RF transmission as energy radiation.

23. A wireless device, comprising:

a data communication circuit for wireless data communication;

a power reception circuit including a charge storage unit;

an interface module configured for integrated wireless power and data transmission using radio frequency (RF) signals in a wireless network, comprising;

a tuner for tuning to receive wireless RF signals in a certain frequency band via an antenna;

a detection module configured for a switching mode that includes switching between power reception mode and data communication mode; and

a split control module configured for selectively distributing received RF signal electrical charge to the power reception circuit and/or the data communication circuit based on the switching mode and/or strength of the RF signal, wherein distributing received RF signal electrical charge is adaptive as a function of at least one of switching mode and strength of the RF signal.

24. The wireless device of claim 23 wherein:

the split control module is further configured for, in power reception mode, distributing received RF signal electrical charge to the power reception circuit only to charge the charge storage unit.

25. The wireless device of claim 24 further comprising a signal strength detector configured for detecting the strength of the received RF signal, wherein the split control module is further configured for, in data communication mode, if the RF signal strength is less than a threshold, then distributing the RF signal electrical charge to the data communication circuit only to operate the data communication circuit.

26. The wireless device of claim 25 wherein the split control module is further configured for, in data communication mode:

if the RF signal strength is greater than a threshold, then splitting distribution of the RF signal electrical charge between the data communication circuit and the power reception circuit, such that received RF signal electrical charge in excess of data communication circuit operational needs is distributed to the power reception circuit to charge the charge storage unit.

27. The wireless device of claim 26 further comprising:

a wireless communication stack cross-layer function configured for generating control signals for switching the wireless device between a power reception mode and a data communication mode, the control signals providing switching information including information about which of the modes to switch to, and information about timing of the switching;

wherein in the data communication mode, the receiving wireless device processes an RF transmission from a sending wireless device as a data communication, and in the power reception mode the receiving wireless device processes the RF transmission as energy radiation.

28. A wireless communication system for radio frequency (RF) power transmission, comprising:

multiple wireless devices configured for forming a wireless network;

a wireless communication stack cross-layer function configured for generating control signals for switching each wireless device between a power reception mode and a data communication mode, the control signals providing switching information including information about which of the modes to switch to, and information about timing of the switching, wherein in the data communication mode, the receiving wireless device processes an RF transmission from a sending wireless device as a data communication, and in the power reception mode the receiving wireless device processes the RF transmission as energy radiation;

one of the wireless devices comprising;

a data communication circuit for wireless data communication;

a power reception circuit including a charge storage unit;

an interface module configured for integrated wireless power and data transmission using radio frequency (RF) signals in a wireless network, comprising;

a tuner for tuning to receive wireless RF signals in a certain frequency band via an antenna;

a detection module configured for a switching mode that includes switching between power reception mode and data communication mode; and

a split control module configured for selectively distributing received RF signal electrical charge to the power reception circuit and/or the data communication circuit based on the switching mode and/or strength of the RF signal, wherein distributing received RF signal electrical charge is adaptive as a function of at least one of switching mode and strength of the RF signal.

29. The system of claim 28 wherein:

the split control module is further configured for, in power reception mode, distributing received RF signal electrical charge to the power reception circuit only to charge the charge storage unit.

30. The system of claim 29 further comprising a signal strength detector configured for detecting the strength of the received RF signal, wherein the split control module is further configured for, in data communication mode:

if the RF signal strength is less than a threshold, then distributing the RF signal electrical charge to the data communication circuit only to operate the data communication circuit.

31. The system of claim 30 wherein the split control module is further configured for, in data communication mode:

if the RF signal strength is greater than a threshold, then splitting distribution of the RF signal electrical charge between the data communication circuit and the power reception circuit, such that received RF signal electrical charge in excess of data communication circuit operational needs is distributed to the power reception circuit to charge the charge storage unit.