SYSTEMS AND METHODS USING ANTENNA BEAM SCANNING FOR IMPROVED COMMUNICATIONS

• US 20090005121A1
• Filed: 06/28/2007
• Published: 01/01/2009
• Est. Priority Date: 06/28/2007
• Status: Active Grant

• Current Assignee: Fimax Technology Limited
• Original Assignee: Fimax Technology Limited
• Inventors: Leung, Hang Ching, Chan, Chun Kit, Wong, Piu Bill
• Granted Patent: US 8,548,525 B2
• Time in Patent Office: Days
• US Class Current: 455/562.100
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H01Q 21/205 providing an omnidirectional coverage turnstile aerials H01Q21/26
• CPC Class Codes: H01Q 25/005 providing two patterns of opposite direction; back to back antennas H01Q25/004 takes precedence
• CPC Class Codes: H01Q 3/26 varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture H01Q3/12, H01Q3/22, H01Q3/24 take precedence

Abstract

Systems and methods which utilize antenna pattern or antenna beam scanning techniques to provide communication of payload traffic are shown. A base station radio is provided wireless communication links with a plurality of stations for communication of payload traffic between the base station and stations using a succession of antenna patterns. The antenna patterns are scanned in succession, such as randomly, quasi-randomly, sequentially, or according to a schedule. An antenna pattern scheduler may be used to implement antenna pattern scanning and traffic timing. Cooperative scheduling with respect to a plurality of base stations may be provided. Selection of the plurality of antenna patterns used by a base station is preferably adjusted from time to time, such as based upon environment, usage patterns, etcetera.

Claims

1. A method comprising:

selecting a plurality of antenna patterns from a group of available antenna patterns;

identifying a respective antenna pattern of said plurality of antenna patterns for traffic channel communication with each of a plurality of stations;

scheduling a scanning order for said plurality of antenna patterns; and

scanning said plurality of antenna patterns according to said scanning order to provide traffic channel communications with said plurality of stations, wherein one or more station of said plurality of stations communicates using a traffic channel when a respective antenna pattern of said plurality of antenna patterns is being scanned.

2. The method of claim 1, wherein said selecting a plurality of antenna patterns comprises:

selecting an initial plurality of antenna patterns based upon an expected operational environment.

3. The method of claim 1, wherein said selecting a plurality of antenna patterns comprises:

revising a previous selection of a plurality of antenna patterns based upon actual operational environment conditions.

4. The method of claim 1, wherein said plurality of antenna patterns comprise a plurality of directional antenna patterns which collectively provide complete illumination of a base station service area.

5. The method of claim 1, wherein said identifying a respective antenna of said plurality of antenna patterns comprises:

transmitting, by said plurality of stations, antenna pattern choice information.

6. The method of claim 5, wherein said antenna pattern choice information identifies an antenna pattern perceived by a respective station as a best choice for use in communicating said traffic channel.

7. The method of claim 5, wherein said identifying a respective antenna pattern of said plurality of antenna patterns comprises:

implementing a ranging protocol for obtaining said antenna pattern choice information.

8. The method of claim 1, wherein said identifying a respective antenna pattern of said plurality of antenna patterns comprises:

using antenna choice information provided by a station and at least one other parameter to identify a preferred antenna pattern of said plurality of antenna patterns for use with respect to said station.

9. The method of claim 8, wherein said at least one other parameter is a parameter selected from the group consisting of:

a velocity metric associated with said station;

a direction of movement metric associated with said station; and

a frequency of communication metric associated with said station.

10. The method of claim 1, wherein said identifying a respective antenna pattern of said plurality of antenna patterns comprises:

identifying a same antenna pattern of said plurality of antenna patterns to provide traffic channel communication with two stations of said plurality of stations which are disposed at different geographic locations.

11. The method of claim 1, wherein said identifying a respective antenna pattern of said plurality of antenna patterns comprises:

identifying two different antenna patterns of said plurality of antenna patterns to provide traffic channel communication with two stations of said plurality of stations which are disposed at a same geographic location.

12. The method of claim 1, wherein said scheduling a scanning order comprises:

scheduling a quasi-random scanning order.

13. The method of claim 1, wherein said scheduling a scanning order comprises:

scheduling a sequential scanning order.

14. The method of claim 1, wherein said scheduling a scanning order comprises:

scheduling a weighted scanning order.

15. The method of claim 1, wherein said scheduling a scanning order comprises:

establishing said scanning order to provide a desired quality of service with respect to at least one station of said plurality of stations.

16. The method of claim 1, wherein said scheduling a scanning, order comprises:

establishing different illumination times for antenna patterns of said plurality of antenna patterns.

17. The method of claim 16, wherein said antenna pattern illumination times are proportional to communication traffic distribution within a service area illuminated by a corresponding said plurality of antenna pattern.

18. The method of claim 1, wherein said scheduling a scanning order comprises:

establishing an illumination frequency for at least one antenna pattern of said plurality of antenna patterns which is greater than an illumination frequency for other antenna patterns of said plurality of antenna patterns.

19. The method of claim 1, wherein said scheduling a scanning order comprises:

establishing said scanning order to minimize intra-network interference.

20. The method of claim 19, wherein said establishing said scanning order comprises:

analyzing information with respect to a plurality of base stations in said network.

21. The method of claim 19, wherein said establishing said scanning order comprises:

coordinating scanning orders of a plurality of base stations.

22. The method of claim 1, wherein said scanning said plurality of antenna patterns comprises:

forming said plurality of antenna patterns for processing antenna beam signals in said scanning order.

23. The method of claim 1, wherein said selecting a plurality of antenna patterns, said identifying a respective antenna pattern of said plurality of antenna patterns, said scheduling a scanning order, and said scanning said plurality of antenna patterns are performed by a wireless base station.

24. The method of claim 1, wherein said traffic channel communications are provided according to a wireless network protocol.

25. The method of claim 1, wherein said wireless network protocol is selected from the group consisting of:

an IEEE 802.11 protocol; and

an IEEE 802.16 protocol.

26. The method of claim 1, wherein said plurality of stations comprise subscriber stations.

27. A method comprising:

providing traffic channel communications for a plurality of stations at a plurality of base stations each using a plurality of antenna patterns, said antenna patterns for each said base station being formed for processing antenna beam signals in a respective scanning sequence; and

coordinating scanning sequences of said plurality of base stations to minimize intra-network interference.

28. The method of claim 27, wherein at least one scanning sequence of said respective scanning sequences comprises a quasi-random, scanning order.

29. The method of claim 27, wherein at least one scanning sequence of said respective scanning sequences comprises a sequential scanning order.

30. The method of claim 27, wherein at least one scanning sequence of said respective scanning sequences comprises a weighted scanning order.

32. The method of claim 27, further comprising:

establishing said respective scanning sequences as a function of antenna pattern choice information provided by said plurality of stations.

33. The method of claim 32, wherein said antenna pattern choice information identifies an antenna pattern perceived by a respective station as a best choice for use in communicating said traffic channel.

31. The method of claim comprising:

establishing at least one scanning sequence of said respective scanning sequences to provide a desired quality of service with respect to at least one station of said plurality of stations.

34. A method comprising:

selecting an initial plurality of antenna patterns from a group of available antenna patterns;

scanning said plurality of antenna patterns according to a scanning sequence to provide traffic channel communications with a plurality of stations; and

revising said selected initial plurality of antenna patterns based upon actual operational environment conditions monitored during said scanning said plurality of antenna patterns to provide a revised plurality of antenna patterns, said revised plurality of antenna patterns being selected from said group of available antenna patterns.

35. The method of claim 34, wherein said selecting an initial plurality of antenna patterns comprises:

selecting a plurality of antenna patterns which collectively provide complete illumination of a desired service area, wherein the antenna patterns making up said plurality of antenna patterns are selected based upon one or more assumed environmental conditions.

36. The method of claim 35, wherein said one or more assumed environmental conditions comprise an even distribution of said stations.

37. The method of claim 35, wherein said one or more assumed environmental conditions comprise a statistically large number of stations, wherein said statistically large number is a number sufficient to result in scanning using said plurality of antenna patterns providing operational performance meeting that of a base station using antenna patterns uniquely formed for each station using channel state information.

38. The method of claim 35, wherein said one or more assumed environmental conditions comprise said plurality of stations being homogenous.

39. The method of claim 34, wherein said revising said selected initial plurality of antenna patterns comprises:

selecting wider beam antenna patterns for illuminating portions of a service area having lesser communication traffic.

40. The method of claim 34, wherein said revising said selected initial plurality of antenna patterns comprises:

selecting wider beam antenna patterns for illuminating portions of a service area having higher velocity stations disposed therein.

41. The method of claim 34, wherein said revising said selected initial plurality of antenna patterns comprises:

selecting narrower beam antenna patterns for illuminating portions of a service area having greater communication traffic.

42. The method of claim 34, wherein said revising said selected initial plurality of antenna patterns comprises:

selecting narrower beam antenna patterns for illuminating portions of a service area having a station requiring a high quality of service.

43. The method of claim 34, wherein said revising said selected initial plurality of antenna patterns comprises:

selecting a plurality of overlapping antenna patterns for at least a portion of a service area.

44. The method of claim 34, wherein said revising said selected initial plurality of antenna patterns comprises:

selecting a plurality of non-overlapping antenna patterns for at least a portion of a service area.

45. The method of claim 34, wherein said revising said selected initial plurality of antenna patterns comprises:

selecting a combination of overlapping and non-overlapping antenna patterns.

46. The method of claim 34, further comprising:

identifying a respective antenna pattern of said initial plurality of antenna patterns for traffic channel communication with each of a plurality of stations.

47. The method of claim 46, further comprising:

identifying a respective antenna pattern of said revised plurality of antenna patterns for traffic channel communication with each of a plurality of stations.

48. A system comprising:

an antenna array;

a beam former coupled to said antenna array;

a transceiver coupled to said beam former and in communication with said antenna array through said beam former;

an antenna pattern controller coupled to said beam former and operable to control said beam former to provide a plurality of antenna patterns for communicating traffic channel signals associated with said transceiver; and

a scheduler coupled to said antenna pattern controller and said transceiver, said scheduler being operable to control said antenna pattern controller to form said plurality of antenna patterns in a predetermined scanning sequence, said predetermined scanning sequence being coordinated with communication of information via said traffic channel signals by said transceiver.

49. The system of claim 48, wherein said beam former comprises a phase shifter network.

50. The system of claim 48, wherein said beam former comprises a digital beam former circuit.

51. The system of claim 48, wherein said antenna array comprises:

a plurality of individual antenna elements which, when coupled to said beam former, provide a phased array.

52. The system of claim 48, wherein said antenna array comprises:

a plurality of antenna panels.

53. The system of claim 48, wherein said transceiver comprises:

a transceiver operable to provide wireless local area network communications.

54. The system of claim 48, wherein said transceiver comprises:

a transceiver operable to provide communications in accordance with at least one of an IEEE 802.11 protocol and an IEEE 802.16 protocol.

55. The system of claim 48, further comprising:

a database of antenna patterns available for use, wherein said plurality of antenna patterns are selected from said database of antenna patterns.

56. The system of claim 48, further comprising:

control logic in communication with said antenna pattern controller and said scheduler, said control logic being operable to revise a selection of antenna patterns forming said plurality of antenna patterns.

57. The system of claim 48, further comprising:

coordinated control logic in communication with said scheduler, said coordinated control logic being operable to coordinate scheduling of antenna pattern scanning sequences for a plurality of base stations to minimize inter-network interference.

58. The system of claim 48, further comprising:

a second antenna array; and

a second beam former coupled to said second antenna array, wherein said transceiver is in communication with said second antenna array through said second beam former.

59. The system of claim 58, wherein said antenna array and said second antenna array provide diversity signals with respect to said transceiver.

60. The system of claim 58, wherein said antenna array and said second antenna array provide multiple-input-multiple-output signals with respect to said transceiver.

61. The system of claim 48, wherein said antenna array and said beam former are provided in a housing separate from said transceiver.

62. The system of claim 48, wherein said antenna array, said beam former, said transceiver, said antenna pattern controller, and said scheduler are provided in a same housing.