Method and apparatus for co-location of two radio frequency devices

• US 8,515,354 B2
• Filed: 07/19/2012
• Issued: 08/20/2013
• Est. Priority Date: 12/28/2001
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Linde, Joakim, Findikli, Aysegul, Jerlhagen, Sven, Vishwakarma, Ritesh
• Primary Examiner(s): Mehrpour, Melody
• Application Number:
  US13/552,826
• Publication Number:
  US 20120282861A1
• Time in Patent Office: 397 Days
• Field of Search: 455/553.1, 455/552.1, 455/419, 455/272, 455/101, 455/129, 455/277.1, 455/283, 455/288, 455/432, 455/428, 455/435, 455/426, 455/550.1, 455/343.1, 455/343.2, 455/343.4, 455/74.1, 455/41.2, 455/445, 455/557, 455/114.2, 455/88, 455/84, 455/67.13, 455/63.1, 455/59, 455/526, 455/524, 455/525, 455/197.1, 455/73, 455/574, 370/503, 370/331, 370/329, 370/350, 370/504, 370/411, 370/500, 370/310, 370/201, 343/702
• US Class Current: 455/63.1
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04B 15/00 Suppression or limitation of noise or interference by means associated with receiver H04B1/10
• CPC Class Codes: H04B 2215/068 by avoiding a reception frequency range
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A method for avoiding signal interference between a first RF circuit and a second RF circuit is provided. The first and second RF circuits are co-located and the first RF circuit is configured to operate in a first frequency range. The second RF circuit is configured to operate in a second frequency range, where the first frequency range overlaps, at least in part, the first frequency range. The method initiates with a controller that is coupled to the first RF circuit and the second RF circuit. Then, the second RF circuit is configured to avoid RF signal collisions with the first RF circuit. An apparatus where two RF devices are co-located without causing interference for each other is also provided.

Claims

1. A method for avoiding signal interference, comprising:

receiving a first frequency range associated with a first radio frequency (RF) circuit at a second RF circuit from a controller that is coupled to the first RF circuit and the second RF circuit, wherein the first RF circuit and the second RF circuit are co-located and the first frequency range associated with the first RF circuit overlaps, at least in part, with a second frequency range associated with the second RF circuit; and

configuring the second RF circuit to avoid RF signal collisions with the first RF circuit.

2. The method of claim 1, wherein:

receiving the first frequency range further includes receiving a mode for the first RF circuit, and

configuring the second RF circuit farther includes configuring the second RF circuit to avoid RF signal collisions with the first RF circuit when the mode for the first RF circuit indicates the first RF circuit, is active.

3. The method of claim 2, further including:

issuing a request by the second RF circuit for the first frequency range of the first RF circuit and for the mode of the first RF circuit to the controller.

4. The method of claim 1, further including:

issuing a request by the second RF circuit for the first frequency range of the first RF circuit to the controller.

5. The method of claim 1, wherein the first frequency range of the first RE circuit is a semi-stationary range.

6. The method of claim 1, wherein the second frequency range associated with the second RF circuit is a semi-stationary range.

7. The method of claim 1, wherein the first RF circuit and the second RF circuit are co-located by placement of both RF circuits within a single electronics system.

8. The method of claim 1, wherein the controller is coupled via a physical bus to the first RF circuit and the second RF circuit.

9. The method of claim 8, wherein the physical bus includes at least one of a Philips I²C bus and an Intel System Management (SM) bus.

10. The method of claim 1, wherein the controller includes a central processing unit.

11. The method of claim 10, wherein the controller further includes at least one of a PCMCIA bus and a USB bus in communication with the central processing unit, the first RF circuit and the second RF circuit.

12. The method of claim 1, wherein the first RF circuit is configured to execute at least one of Bluetooth, 802.11, ultrawideband, Zigbee, DECT and global positioning system (GPS) protocols.

13. The method of claim 1, wherein the second RF circuit is configured to execute at least one of Bluetooth, 802.11, ultrawideband, Zigbee, DECT and global positioning system (GPS) protocols.

14. The method of claim 1, further including:

providing the frequency range by the first RF circuit to the controller.

15. The method of claim 2, further including:

providing the frequency range and the mode by the first RF circuit to the controller.

16. A method for avoiding signal interference, comprising:

receiving a first frequency range for a first radio frequency (RF) circuit at a second RF circuit from a controller that is coupled to the first RF circuit and the second RF circuit, wherein the first RF circuit and the second RF circuit are co-located, wherein the second RF circuit is a slave to a third RF circuit and wherein the first frequency range overlaps, at least in part, with a second frequency range associated with the third RF circuit; and

causing a propagation of a status of the first RF circuit from the controller through the second RF circuit to the third RF circuit, wherein the third RF circuit is configured to avoid RF signal collisions with the first RF circuit when the status indicates that the first RF circuit is active.

17. The method of claim 16, wherein the first frequency range of the first RF circuit is a semi-stationary range.

18. The method of claim 16, wherein the second frequency range associated with the second RF circuit is a semi-stationary range.

19. The method of claim 16, wherein the first RF circuit and the second RF circuit are co-located by placement of both RF circuits within a single electronics system.

20. The method of claim 16, wherein the controller is coupled via a physical bus to the first RF circuit and the second RF circuit.

21. The method of claim 20, wherein the physical bus includes at least one of a Philips I²C bus and a Intel System Management (SM) bus.

22. The method of claim 16, wherein the controller includes a central processing unit.

23. The method of claim 22, wherein the controller further includes at least one of a PCMCIA bus and a USB bus in communication with the central processing unit, the first RF circuit and the second RF circuit.

24. The method of claim 16, wherein the first RF circuit is configured to execute at least one of Bluetooth, 802.11, ultrawideband, Zigbee, DECT and global positioning system (GPS) protocols.

25. The method of claim 16, wherein the second RF circuit is configured to execute at least one of Bluetooth, 802.11, ultrawideband, Zigbee, DECT and global positioning system (GPS) protocols.

26. The method of claim 16, further including:

providing the first frequency range by the first RF circuit to the controller.

27. An apparatus comprising:

a first radio frequency (RF) circuit configured to operate within a first frequency range;

a second RF circuit co-located with the first RF circuit, the second RF circuit configured to operate within a second frequency range, wherein the first frequency range overlaps, at least in part, with the second frequency range; and

a controller that is coupled to the first RF circuit and the second RF circuit, wherein the second RF circuit is configured, using frequency information provided from the controller, to avoid RF signal collisions with the first RF circuit.

28. The apparatus of claim 27, wherein the controller further enables provision of a mode associated with the first RF circuit to the second circuit, the mode indicating when the first RF circuit is active.

29. The apparatus of claim 27, wherein the first frequency range is a semi-stationary range.

30. The apparatus of claim 27, wherein the second frequency range is a semi-stationary range.

31. The apparatus of claim 27, wherein the controller is coupled via a physical bus to the first RF circuit and the second RF circuit.

32. The apparatus of claim 31, wherein the physical bus includes at least one of a Philips I²C bus and a Intel System Management (SM) bus.

33. The apparatus of claim 27, wherein the first RF circuit and the second RF circuit are co-located by placement of both RF circuits within a single electronics system.

34. The apparatus of claim 27, wherein the controller includes a central processing unit (CPU), the first RF circuit being in communication with the CPU through a first bus, and the second RF circuit being in communication with the CPU through a second bus.

35. The apparatus of claim 27, wherein the first RF circuit is configured to provide the first frequency range to the second RF circuit via a driver associated with the first RF circuit.

36. The apparatus of claim 27, wherein the second RF circuit is configured to receive the first frequency range in response to a request from a driver associated with the second RF circuit.

37. The apparatus of claim 27, wherein the first RF circuit is configured to execute at least one of Bluetooth, 802.11, ultrawideband, Zigbee, DECT and global positioning system (GPS) protocols.

38. The apparatus of claim 27, wherein the second RF circuit is configured to execute at least one of Bluetooth, 802.11, ultrawideband, Zigbee, DECT and global positioning system (GPS) protocols.

39. An apparatus comprising:

a first radio frequency (RF) circuit configured to operate within a first frequency range;

a second RF circuit co-located with the first RF circuit;

a third RF circuit configured to operate within a second frequency range that overlaps, at least in part, with the first frequency range, and wherein the second RF circuit is configured as a slave to the third RF circuit; and

a controller that is coupled to the first RF circuit and the second RF circuit for propagation of at least a status and the first frequency range of the first RF circuit to reach the third RF circuit so that the third RF circuit avoids RF signal collisions when the status indicates that the first RF circuit is active.