METHOD AND APPARATUS FOR CREATING BEAMFORMING PROFILES IN A WIRELESS COMMUNICATION NETWORK

• US 20090122715A1
• Filed: 11/05/2008
• Published: 05/14/2009
• Est. Priority Date: 11/06/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Lakkis, Ismail
• Granted Patent: US 8,219,891 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0619 using feedback from receiving side feedback signaling for adaptive modulation/coding H04L1/0001
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04J 13/0014 Golay
• CPC Class Codes: H04J 13/105 by extending
• CPC Class Codes: H04W 16/28 using beam steering

Abstract

A wireless communications network uses a beamforming process to increase signal quality as well as transmission capabilities and reduction of interference. An improved Golay sequence is also used in the wireless communications network. In one aspect, the processes can be used to communicate regardless of whether the system is on an OFDM mode or a single carrier mode.

Claims

1. A method for communication comprising:

transmitting a plurality of quasi-omni packets from a first device, each quasi-omni packet being transmitted in a particular quasi-omni pattern; and

transmitting a plurality of preambles from the first device, each preamble being transmitted in one of a plurality of directional patterns, wherein the plurality of quasi-omni packets and the plurality of preambles are used to determine a beamforming profile.

2. The method of claim 1, wherein the plurality of directional patterns is based on one particular quasi-omni pattern.

3. The method of claim 2, wherein the one particular quasi-omni pattern is identified by a second device that has received at least one quasi-omni packet.

4. The method of claim 1, wherein each quasi-omni pattern has a coverage broader than a coverage of each directional pattern.

5. The method of claim 1, wherein each quasi-omni pattern comprises at least one of a plurality of sectors, one a plurality of directions, and one of a plurality of a pattern of a switched antenna array.

6. The method of claim 1, wherein at least one of the plurality of quasi-omni packets comprises a beacon.

7. The method of claim 1, further comprising:

receiving an association request from a second device comprising a requested pattern, wherein the requested pattern comprising at least one of a selected quasi-omni pattern and a selected directional pattern; and

transmitting all future communication for the second device based on the requested pattern.

8. The method of claim 7, wherein the requested pattern is selected based on a link quality factor identified by the second device.

9. The method of claim 8, wherein the link quality factor is based on at least one of a signal strength, a signal to noise ratio, and a signal to noise and interference ratio.

10. The method of claim 1, further comprising:

monitoring for a preamble from a plurality of directions with the first device;

determining a link quality factor for each of the plurality of directions based on the preamble;

identifying a preferred direction from the plurality of directions based on the link quality factor; and

transmitting a feedback comprising the preferred direction.

11. The method of claim 10, wherein the feedback further comprises a link quality factor corresponding to the preferred direction.

12. The method of claim 10, wherein the link quality factor is based on at least one of a signal strength, a signal to noise ratio, and a signal to noise and interference ratio.

13. The method of claim 1, wherein each quasi-omni packet comprises at least one of a quasi-omni packet, a number of quasi-omni packets, and a total number of quasi-omni directions.

14. A method for communication comprising:

detecting at least one quasi-omni packet of a plurality of quasi-omni packets transmitted in a plurality of quasi-omni patterns from a first device;

detecting a preamble transmitted in a directional pattern from the first device;

determining a preferred pattern comprising at least one of a detected quasi-omni pattern and a detected directional pattern; and

transmitting a feedback comprising the preferred pattern to the first device.

15. The method of claim 14, wherein each quasi-omni packet comprises a beacon.

16. The method of claim 14, wherein the detection comprises sweeping over a plurality of quasi-omni patterns of a second device.

17. The method of claim 14, wherein the detection comprises sweeping over a plurality directional patterns of a second device.

18. A communication apparatus comprising:

means for transmitting a plurality of quasi-omni packets from a first device, each quasi-omni packet being transmitted in a particular quasi-omni pattern; and

,

means for transmitting a plurality of preambles from the first device, each preamble being transmitted in one of a plurality of directional patterns, wherein the plurality of quasi-omni packets and the plurality of preambles are used to determine a beamforming profile.

19. The communication apparatus of claim 18, wherein the plurality of directional patterns is based on one particular quasi-omni pattern.

20. The communication apparatus of claim 19, wherein the one particular quasi-omni pattern is identified by a second device that has received at least one quasi-omni packet.

21. The communication apparatus of claim 18, wherein each quasi-omni pattern has a coverage broader than a coverage of each directional pattern.

22. The communication apparatus of claim 18, wherein each quasi-omni pattern comprises at least one of a plurality of sectors, one a plurality of directions, and one of a plurality of a pattern of a switched antenna array.

23. The communication apparatus of claim 18, wherein at least one of the plurality of quasi-omni packets comprises a beacon.

24. The communication apparatus of claim 18, further comprising:

means for receiving an association request from a second device comprising a requested pattern, wherein the requested pattern comprising at least one of a selected quasi-omni pattern and a selected directional pattern; and

means for transmitting all future communication for the second device based on the requested pattern.

25. The communication apparatus of claim 24, wherein the requested pattern is selected based on a link quality factor identified by the second device.

26. The communication apparatus of claim 25, wherein the link quality factor is based on at least one of a signal strength, a signal to noise ratio, and a signal to noise and interference ratio.

27. The communication apparatus of claim 18, further comprising:

means for monitoring for a preamble from a plurality of directions with the first device;

means for determining a link quality factor for each of the plurality of directions based on the preamble;

means for identifying a preferred direction from the plurality of directions based on the link quality factor; and

means for transmitting a feedback comprising the preferred direction.

28. The communication apparatus of claim 27, wherein the feedback further comprises a link quality factor corresponding to the preferred direction.

29. The communication apparatus of claim 28, wherein the link quality factor is based on at least one of a signal strength, a signal to noise ratio, and a signal to noise and interference ratio.

30. The communication apparatus of claim 18, wherein each quasi-omni packet comprises at least one of a quasi-omni packet, a number of quasi-omni packets, and a total number of quasi-omni directions.

31. A communication apparatus for communication comprising:

means for detecting at least one quasi-omni packet of a plurality of quasi-omni packets transmitted in a plurality of quasi-omni patterns from a first device;

means for detecting a preamble transmitted in a directional pattern from the first device;

means for determining a preferred pattern comprising at least one of a detected quasi-omni pattern and a detected directional pattern; and

means for transmitting a feedback comprising the preferred pattern to the first device.

32. The communication apparatus of claim 31, wherein each quasi-omni packet comprises a beacon.

33. The communication apparatus of claim 31, wherein the detection means comprises means for sweeping over a plurality of quasi-omni patterns of a second device.

34. The communication apparatus of claim 31, wherein the detection means comprises means for sweeping over a plurality directional patterns of a second device.

35. A communication apparatus comprising:

a processing system configured to;

transmit a plurality of quasi-omni packets from a first device, each quasi-omni packet being transmitted in a particular quasi-omni pattern; and

,

transmit a plurality of preambles from the first device, each preamble being transmitted in one of a plurality of directional patterns, wherein the plurality of quasi-omni packets and the plurality of preambles are used to determine a beamforming profile.

36. The communication apparatus of claim 35, wherein the plurality of directional patterns is based on one particular quasi-omni pattern.

37. The communication apparatus of claim 36, wherein the one particular quasi-omni pattern is identified by a second device that has received at least one quasi-omni packet.

38. The communication apparatus of claim 35, wherein the quasi-omni pattern has a coverage broader than a coverage of each directional pattern.

39. The communication apparatus of claim 35, wherein each quasi-omni pattern comprises at least one of a plurality of sectors, one a plurality of directions, and one of a plurality of a pattern of a switched antenna array.

40. The communication apparatus of claim 35, wherein at least one of the plurality of quasi-omni packets comprises a beacon.

41. The communication apparatus of claim 35, wherein the processing system is further configured to:

receive an association request from a second device comprising a requested pattern, wherein the requested pattern comprising at least one of a selected quasi-omni pattern and a selected directional pattern; and

transmit all future communication for the second device based on the requested pattern.

42. The communication apparatus of claim 41, wherein the requested pattern is selected based on a link quality factor identified by the second device.

43. The communication apparatus of claim 42, wherein the link quality factor is based on at least one of a signal strength, a signal to noise ratio, and a signal to noise and interference ratio.

44. The communication apparatus of claim 42, wherein the processing system is further configured to:

monitor for a preamble from a plurality of directions with the first device;

determine a link quality factor for each of the plurality of directions based on the preamble;

identify a preferred direction from the plurality of directions based on the link quality factor; and

transmit a feedback comprising the preferred direction.

45. The communication apparatus of claim 44, wherein the feedback further comprises a link quality factor corresponding to the preferred direction.

46. The communication apparatus of claim 44, wherein the link quality factor is based on at least one of a signal strength, a signal to noise ratio, and a signal to noise and interference ratio.

47. The communication apparatus of claim 35, wherein each quasi-omni packet comprises at least one of a quasi-omni packet, a number of quasi-omni packets, and a total number of quasi-omni directions.

48. A communication apparatus for communication comprising:

a processing system configured to;

detect at least one quasi-omni packet of a plurality of quasi-omni packets transmitted in a plurality of quasi-omni patterns from a first device;

detect a preamble transmitted in a directional pattern from the first device;

determine a preferred pattern comprising at least one of a detected quasi-omni pattern and a detected directional pattern; and

transmit a feedback comprising the preferred pattern to the first device.

49. The communication apparatus of claim 48, wherein each quasi-omni packet comprises a beacon.

50. The communication apparatus of claim 48, wherein the processing system is further configured to sweep over a plurality of quasi-omni patterns of a second device.

51. The communication apparatus of claim 48, wherein the processing system is further configured to sweep over a plurality directional patterns of a second device.

52. A computer-program product for wireless communications comprising:

a machine-readable medium encoded with instructions executable to;

transmit a plurality of quasi-omni packets from a first device, each quasi-omni packet being transmitted in a particular quasi-omni pattern; and

,

transmit a plurality of preambles from the first device, each preamble being transmitted in one of a plurality of directional patterns, wherein the plurality of quasi-omni packets and the plurality of preambles are used to determine a beamforming profile.

53. A computer-program product for wireless communications comprising:

a machine-readable medium encoded with instructions executable to;

detect at least one quasi-omni packet of a plurality of quasi-omni packets transmitted in a plurality of quasi-omni patterns from a first device;

detect a preamble transmitted in a directional pattern from the first device;

determine a preferred pattern comprising at least one of a detected quasi-omni pattern and a detected directional pattern; and

transmit a feedback comprising the preferred pattern to the first device.

54. A piconet coordinator comprising:

an antenna; and

a processing system configured to;

transmit, using the antenna, a plurality of quasi-omni packets from a first device, each quasi-omni packet being transmitted in a particular quasi-omni pattern; and

,

transmit, using the antenna, a plurality of preambles from the first device, each preamble being transmitted in one of a plurality of directional patterns, wherein the plurality of quasi-omni packets and the plurality of preambles are used to determine a beamforming profile.

55. A communications device comprising:

an antenna; and

a processing system configured to;

detect at least one quasi-omni packet of a plurality of quasi-omni packets transmitted in a plurality of quasi-omni patterns from a first device;

detect a preamble transmitted in a directional pattern from the first device;

determine a preferred pattern comprising at least one of a detected quasi-omni pattern and a detected directional pattern; and

transmit a feedback comprising the preferred pattern to the first device using the antenna.