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US 9,854,451 B2Granted
Methods of optimizing tilt angle of an antenna
AssigneeQatar University Qstp-B
InventorsAli Imran, Adnan Abu-Dayya
Life of this patent
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Abstract
Disclosed is a method of optimizing tilt angle of antennas of a plurality of cells in a wireless cellular system. The method comprising the steps of autonomously determining focal point of each cell of the plurality of cells whose angle of tilt is to be optimized; determining jointly optimal tilt values of the antennas of the plurality of cells based on the determined focal points; and configuring the tilt angle of the antennas of the plurality of cells based on said optimal tilt values.
Claims20
A method of optimizing tilt angle of antennas of a plurality of cells in a wireless cellular system, the method comprising the steps of:
- determining autonomously a focal point of each cell of the plurality of cells whose angle of tilts is to be optimized is based on user demographics;
- determining jointly optimal tilt values of the antennas of the plurality of cells based on the determined focal points;
- and
- configuring the tilt angle of the antennas of the plurality of cells based on said optimal tilt values,
- wherein the step of determining autonomously the focal point of each cell further comprising the steps of:
- dividing each cell of the plurality of cells into a finite number of virtual bins;
- gathering user measurement report from each virtual bin from the finite number of virtual bins;
- assigning a weight to each virtual bin representing a significance of the bin;
- ascertaining whether a focal point update is required for each cell based on the weightage assigned to each bin of the each cell;
- determining a value of tilt of the cell that maximizes the weighted average spectral efficiency in all bins in the cell;
- mapping the determined value of tilt into a locus of points in the said cell;
- determining a point on the locus that minimizes the weighted sum distance from all virtual bins in the cell;
- and
- setting the point on the locus as the focal point of the cell.
11 more elements
A method of autonomously determining a focal point of a cell based on user demographics in a wireless cellular system, the method comprising the steps of:
- dividing each cell of the plurality of cells into a finite number of virtual bins;
- gathering user measurement report from each bin from the finite number of virtual bins;
- assigning a weight to each virtual bin representing the significance of the bin;
- ascertaining whether a focal point update is required for each cell based on the weightage assigned to each bin of the each cell;
- determining a value of tilt of the cell that maximizes the weighted average spectral efficiency in all bins in the cell;
- mapping the determined value of tilt into a locus of points in the said cell;
- determining a point on the locus that minimizes the weighted sum distance from all virtual bins in the cell;
- and
- setting the point on the locus as the focal point of the cell.
6 more elements
A method of autonomously determining a focal point of a cell based on relay station or femto cell locations in a wireless cellular system, the method comprising the steps of:
- gathering configuration parameters of each cell of the plurality of cells in the wireless cellular system;
- ascertaining whether a focal point update is required for each cell based on configuration parameters of the each cell;
- considering physical locations of one or more relay stations or femto cells as physical location of users;
- determining the focal point of the cell based on the user demographics when said cell comprises a plurality of relay stations or femto cells;
- and
- assigning weightage to the focal point of the cell depending on significance of the relay station or femto cell,
- wherein the step of determining of the focal point of the cell based on user demographics further comprising the steps of:
- dividing each cell into a finite number of virtual bins;
- gathering user measurement report from each virtual bin from the finite number of virtual bins;
- assigning a weight to each virtual bin representing the significance of the bin;
- ascertaining whether the focal point update is required for each cell based on the weightage assigned to each bin of the cell;
- determining a value of tilt of the cell that maximizes the weighted average spectral efficiency in all bins in the cell;
- mapping the determined value of tilt into a locus of points in the said cell;
- determining a point on the locus that minimizes the weighted sum distance from all virtual bins in the cell;
- and
- setting the point on locus as the focal point of the cell.
13 more elements
A method of autonomously determining a focal point of a cell based on coverage or service level in a wireless cellular system, the method comprising the steps of:
- gathering user measurement reports in each cell of the plurality of cells in the wireless cellular system;
- ascertaining whether a focal point update is required for each cell based on user measurement reports of the each cell;
- determining points in the cell of the wireless cellular system with coverage or service below a threshold level;
- considering the points with coverage or service below the threshold level as physical location of users;
- and
- determining the focal point of the cell based on the user demographics when the cell comprises more than one such points with coverage or service below the threshold level,
- wherein the step of determination of the focal point of the cell based on user demographics further comprising the steps of:
- dividing each cell into a finite number of virtual bins;
- gathering user measurement report from each virtual bin from the finite number of virtual bins;
- assigning a weight to each virtual bin representing the significance of the bin;
- ascertaining whether a focal point update is required for each cell based on the weightage assigned to each bin of the cell;
- determining a value of tilt of the cell that maximizes the weighted average spectral efficiency in all bins in the cell;
- mapping the determined value of tilt into a locus of points in the said cell;
- determining a point on the locus that minimizes the weighted sum distance from all virtual bins in the cell;
- and
- setting the point on locus as the focal point of the cell.
13 more elements
Dependencies are inferred from the claim text.