Method and apparatus for smart beam selection in a smart antenna system

• US 7,826,854 B2
• Filed: 09/26/2008
• Issued: 11/02/2010
• Est. Priority Date: 04/16/2002
• Status: Expired due to Fees

• Current Assignee: Mind Fusion, LLC (Ascend Innovation Management, LLC)
• Original Assignee: Faulkner Interstices LLC (Intellectual Ventures LLC)
• Inventors: Shenhar, Eran, Hovers, Omri, Kagan, Shahar
• Primary Examiner(s): Cumming; William D
• Application Number:
  US12/239,094
• Publication Number:
  US 20090143073A1
• Time in Patent Office: 767 Days
• Field of Search: 455/562.1, 455/452.2, 455/550.1, 342/368
• US Class Current: 455/452.2
• CPC Class Codes: H04B 7/061 using feedback from receiving side

Abstract

A method of beam selection in a smart antenna system is provided. The method includes receiving a plurality of uplink beams by a plurality of receivers, each corresponding with one of the plurality of uplink beams. Each uplink beam includes signals transmitted by a mobile station. The method further includes analyzing each of the plurality of uplink beams and selecting an uplink beam from the plurality of uplink beams based at least in part on the analysis of the uplink beams. The method further includes switching to the selected beam in real time to allow the signals communicated in the selected beam to be communicated to a base station transceiver.

Claims

1. A method of selecting an uplink beam as an uplink smart decision beam selection, comprising:

receiving a plurality of uplink beams;

determining a correlation quality for each uplink beam in the plurality of uplink beams by correlating signal sequences received in the uplink beam with a known training sequence;

determining a quality factor for each uplink beam in the plurality of uplink beams, wherein the quality factor for each uplink beam is based on the correlation quality and a signal strength for the uplink beam;

determining a provisional beam of the plurality of uplink beams, based on the quality factors for the plurality of uplink beams;

verifying the provisional beam; and

responsive to verifying the provisional beam, selecting the provisional beam as the uplink smart decision beam selection.

2. The method of claim 1, wherein determining a provisional beam comprises:

determining a best quality beam number for the plurality of uplink beams, based on the quality factors for the plurality of uplink beams; and

determining the provisional beam based on the best quality beam number.

3. The method of claim 2, wherein the best quality beam number is a beam number of an uplink beam having the highest quality factor.

4. The method of claim 1, further comprising:

responsive to not verifying the provisional beam selection, selecting the uplink smart decision beam selection based on signaling information.

5. The method of claim 1, wherein determining a quality factor for each uplink beam in the plurality of uplink beams comprises use of a quality factor algorithm that utilizes one or more uplink weights for each uplink beam in the plurality of uplink beams to determine the quality factor for the uplink beam.

6. The method of claim 5, wherein the one or more uplink weights for each uplink beam in the plurality of uplink beams comprises an uplink correlation quality weight based on the correlation quality of the uplink beam.

7. The method of claim 5, wherein the one or more uplink weights for each uplink beam in the plurality of uplink beams comprises an uplink signal strength weight based on the signal strength of the uplink beam.

8. The method of claim 1, wherein determining the quality factor for each uplink beam comprises determining the quality factor for each uplink beam based on correlation qualities determined at one or more prior time slots of the uplink beam and signal strengths determined at the one or more prior time slots of the uplink beam.

9. The method of claim 8, wherein the quality factor for each beam is determined by taking a weighted sum of both the correlation qualities determined at the one or more prior time slots of the uplink beam and the signal strengths determined at the one or more prior time slots of the uplink beam.

10. The method of claim 1, further comprising:

storing the correlation quality for each uplink beam in the plurality of uplink beams in a parameter database.

11. The method of claim 1, further comprising:

storing the signal strength for each uplink beam in the plurality of uplink beams in a parameter database.

12. The method of claim 1, wherein at least some of the plurality of uplink beams comprise signals transmitted by a mobile station.

13. The method of claim 1, wherein receiving the plurality of uplink beams comprises:

receiving one or more input signals at a smart antenna array; and

at a beam forming network, forming each uplink beam in the plurality of uplink beams based on the received one or more input signals.

14. A smart antenna apparatus, comprising:

a receiving unit configured to receive one or more beam signals, wherein the one or more beam signals each comprise at least one input signal received at a smart antenna array, and wherein the one or more beam signals are formed at a beam forming network;

a plurality of beam analysis modules configured to determine signal strengths of the one or more beam signals and to determine correlation qualities of the one or more beam signals; and

a smart decision beam selection module coupled with the plurality of beam analysis modules, configured to select an uplink smart decision beam selection from the one or more beam signals based on the signal strengths and the correlation qualities.

15. The smart antenna apparatus of claim 14, wherein the receiving unit is further configured to receive the one or more beam signals at a given frequency.

16. The smart antenna apparatus of claim 14, further comprising a storage module coupled to the plurality of beam analysis modules and configured to store one or more signal strengths and one or more correlation qualities.

17. The smart antenna apparatus of claim 16, wherein the smart decision beam selection module is further configured to select the uplink smart decision beam selection based on the stored one or more signal strengths and the stored one or more correlation qualities.

19. The smart antenna apparatus of claim 14, wherein the means for receiving one or more beam signals is further configured to receive one or more beam signals at a given frequency.

20. The smart antenna apparatus of claim 14, further comprising storage means coupled to the plurality of means for beam selection and to the means for smart decision beam selection, configured to store one or more signal strengths and one or more correlation qualities, wherein the means for smart decision beam selection is further configured to select the uplink smart decision beam selection based on the stored one or more signal strengths and one or more correlation qualities.

18. A smart antenna apparatus, comprising:

means for receiving one or more beam signals, wherein the one or more beam signals each comprise at least one input signal received at a smart antenna array, and wherein the one or more beam signals are formed at a beam forming network;

means for beam analysis configured to determine signal strengths of the one or more beam signals and to determine correlation qualities of the one or more beam signals; and

means for smart decision beam selection, coupled with the means for beam analysis, configured to select an uplink smart decision beam selection from the one or more beam signals based on the signal strengths and the correlation qualities.