IP Library Granted Patent US 9,648,502
Granted Patent B2
US 9,648,502 · App. 13/967,840 · Granted May 9, 2017

System for tailoring wireless coverage to a geographic area

Inventors: Joseph Carey (Longmont, CO); Robert Weaver (Boulder, CO); Russell Brinkman (Louisville, CO)
Assignee: Trimble Navigation Limited
H04W16/18H04W84/12
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Quick Facts
Patent No.
US 9,648,502
App. No.
13/967,840
Granted
May 9, 2017
Kind
B2
Abstract

Provided herein are systems and methods (i.e., utilities) that allow for synthesizing antenna patterns for wireless access points that provide coverage in a wireless network. The utilities utilize various mathematical models to identify antenna settings that enhance coverage of a coverage area.

Claims (29)

1. A computer implemented method for generating antennas beamformer weights for two or more adaptive antennas to provide coverage for a wireless network coverage area, comprising:

generating a coverage area computer model defining a physical wireless coverage area and physical locations of at least two adaptive antennas that provide wireless communications for said wireless coverage area wherein said physical coverage area is divided into a plurality of grid cells;

processing a network performance computer model and at least first and second adaptive antenna computer models of antenna beamformer weights that produce antenna beam patterns for each of said adaptive antennas, on a processing platform, to determine:

for each grid cell, a numerical probability of successful packet transfer to at least one of said adaptive antennas; and;

a network performance reference value calculated from a combination of said numerical probability of successful packet transfer for each of said grid cells and representing an overall probability of successful packet transfer from all said grid cells of said wireless coverage area to at least one of said adaptive antennas, wherein said network performance reference value is a numerical value;

iteratively adjusting beamformer weights of said adaptive antenna computer models; and

for each iterative adjustment of said beamformer weights, reprocessing said network performance computer model with said first and second adaptive computer models to produce a single series of adjusted network performance values;

identifying when one of said single series of adjusted network performance values is greater than said network performance reference value;

when an identified one of said single series of adjusted network performance values is numerically greater than said network performance reference value, resetting at least one antenna beamformer weight of one of said antenna computer models to a beamformer weight that produced the identified one of said single series of adjusted network performance values;

generating an output of antenna beamformer weights based on said iterative adjustment, reprocessing, identifying and resetting steps; and

setting said adaptive antennas to said output of antenna beamformer weights.

2. The method of claim 1 , further comprising:

resetting the network performance reference value to said identified one of said single series of adjusted network performance values.

3. The method of claim 2 , further comprising:

repeating said iteratively adjusting, reprocessing, and resetting steps until one of:

none of said single series of adjusted network performance values is greater than said network performance reference value; or

none of said single series of adjusted network performance values is greater than said network performance reference value by more than a predetermined value.

4. The method of claim 1 , wherein generating said coverage area computer model comprises:

geographically defining a coverage area of at least a portion of a physical wireless coverage area and physical locations of said adaptive antennas in said physical wireless coverage area.

5. The method of claim 4 , further comprising:

generating a grid having multiple grid cells associated with said physical wireless coverage area, wherein at least one of a distance, angle and elevation between each grid cell and said adaptive antennas is determined.

6. The method of claim 1 , wherein said steps of processing and reprocessing each further comprise:

determining a data capacity of signal transfer between said locations in said wireless coverage area and at least one of said adaptive antennas.

7. The method of claim 1 , wherein said steps of processing and reprocessing further comprise:

estimating a path loss value between said locations in said wireless coverage area and at least one of said adaptive antennas.

8. The method of claim 1 , wherein said adaptive antenna computer models comprise:

mathematical models of beam pattern formation based on a configuration of antenna elements of said adaptive antennas.

9. The method of claim 1 , wherein said steps of processing and reprocessing further comprise:

computing a signal to noise ratio (SNR) for signals between said locations in said wireless coverage area and at least one of said adaptive antennas.

Assignments (3)
MERGER Recorded Sep 29, 2017
From: TRIMBLE NAVIGATION LIMITED; TRIMBLE INC.
To: TRIMBLE INC.
Reel/Frame 043743/0972 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 27, 2017
From: FIDELITY COMTECH, INC.
To: TRIMBLE NAVIGATION LIMITED
Reel/Frame 041749/0602 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 19, 2014
From: CAREY, JOSEPH; WEAVER, ROBERT; BRINKMAN, RUSSELL
To: FIDELITY COMTECH, INC.
Reel/Frame 032471/0821 →
Continuity (2)
Provisional Application 61683562 · Aug 15, 2012
Related Publication 20140057638A1 · Feb 27, 2014