Locally adjusted radio frequency coverage maps in wireless networks
First Claim
1. One or more non-transitory, computer-readable storage media embodying software operable when executed by one or more computer systems to:
- receive calibration data comprising one or more observed received signal strength values corresponding to a radio frequency transmitter, each of the observed received signal strength values being received at one of one or more calibration points, each of the calibration points residing in one of one or more location bins;
identify an applicable coverage map, the coverage map providing, for the radio frequency transmitter, one or more estimated received signal strength values, each of the estimated received signal strength values being estimated for one of the location bins;
determine one or more offset values, each of the offset values being determined for one of the calibration points based on a difference between the observed received signal strength value—
received at the calibration point and the estimated received signal strength value estimated for the location bin in which the calibration point resides;
define one or more correction cones, each of the correction cones being defined for one of the calibration points with its base centered at the calibration point, its height correlating to the offset value for the calibration point, and intersecting one or more of the location bins, for each of the location bins intersecting the base of the correction cone, a first height measured from a center of the location bin to a lateral surface of the correction cone correlating to a correction value for the location bin that is a percentage of the offset value for the calibration point at the center of the base of the correction cone, the percentage being calculated based on the first height and a second height measured from the center of the base of the correction cone to an apex of the correction cone; and
adjust the estimated received signal strength value at each of the location bins based on the correction value for the location bin.
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Accused Products
Abstract
In one embodiment, a method for adjusting a radio-frequency coverage map. The method includes receiving calibration data comprising observed received signal strength values at one or more calibration points corresponding to a radio frequency transmitter, and identifying an applicable coverage map, where the coverage map provides, for the radio frequency transmitter, estimated received signal strength values at one or more locations. The method also includes determining one or more offset values at the one or more calibration points, where an offset value is based on a difference between an observed received signal strength value and an estimated received signal strength value at a given calibration point. The method also includes adjusting one or more estimated received signal strength values at one or more location bins of the coverage map based on a distance from the one or more calibration points and the one or more offset values.
103 Citations
20 Claims
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1. One or more non-transitory, computer-readable storage media embodying software operable when executed by one or more computer systems to:
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receive calibration data comprising one or more observed received signal strength values corresponding to a radio frequency transmitter, each of the observed received signal strength values being received at one of one or more calibration points, each of the calibration points residing in one of one or more location bins; identify an applicable coverage map, the coverage map providing, for the radio frequency transmitter, one or more estimated received signal strength values, each of the estimated received signal strength values being estimated for one of the location bins; determine one or more offset values, each of the offset values being determined for one of the calibration points based on a difference between the observed received signal strength value—
received at the calibration point and the estimated received signal strength value estimated for the location bin in which the calibration point resides;define one or more correction cones, each of the correction cones being defined for one of the calibration points with its base centered at the calibration point, its height correlating to the offset value for the calibration point, and intersecting one or more of the location bins, for each of the location bins intersecting the base of the correction cone, a first height measured from a center of the location bin to a lateral surface of the correction cone correlating to a correction value for the location bin that is a percentage of the offset value for the calibration point at the center of the base of the correction cone, the percentage being calculated based on the first height and a second height measured from the center of the base of the correction cone to an apex of the correction cone; and adjust the estimated received signal strength value at each of the location bins based on the correction value for the location bin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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receiving, at one or more computer systems, calibration data comprising one or more observed received signal strength values corresponding to a radio frequency transmitter, each of the observed received signal strength values being received at one of one or more calibration points, each of the calibration points residing in one of one or more location bins; identifying, by the computer systems, an applicable coverage map, the coverage map—
providing, for the radio frequency transmitter, one or more estimated received signal strength values, each of the estimated received signal strength values being estimated for one of the location bins;determining, by the computer systems, one or more offset values, each of the offset values being determined for one of the calibration points based on a difference between the observed received signal strength value received at the calibration point and the estimated received signal strength value estimated for the location bin in which the calibration point resides; defining, by the computer systems, one or more correction cones, each of the correction cones being defined for one of the calibration points with its base centered at the calibration point, its height correlating to the offset value for the calibration point, and intersecting one or more of the location bins, for each of the location bins intersecting the base of the correction cone, a first height measured from a center of the location bin to a lateral surface of the correction cone correlating to a correction value for the location bin that is a percentage of the offset value for the calibration point at the center of the base of the correction cone, the percentage being calculated based on the first height and a second height measured from the center of the base of the correction cone to an apex of the correction cone; and adjusting, by the computer systems, the estimated received signal strength value at each of the location bins based on the correction value for the location bin. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A system comprising:
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memory comprising instructions executable by one or more processors; and one or more processors coupled to the memory and operable to execute the instructions, the one or more processors being operable when executing the instructions to; receive calibration data comprising one or more observed received signal strength values corresponding to a radio frequency transmitter, each of the observed received signal strength values being received at one of one or more calibration points, each of the calibration points residing in one of one or more location bins; identify an applicable coverage map, the coverage map providing, for the radio frequency transmitter, one or more estimated received signal strength values, each of the estimated received signal strength values being estimated for one of the location bins; determine one or more offset values, each of the offset values being determined for one of the calibration points based on a difference between the observed received signal strength value received at the calibration point and the estimated received signal strength value estimated for the location bin in which the calibration point resides; define one or more correction cones, each of the correction cones being defined for one of the calibration points with its base centered at the calibration point, its height correlating to the offset value for the calibration point, and intersecting one or more of the location bins, for each of the location bins intersecting the base of the correction cone, a first height measured from a center of the location bin to a lateral surface of the correction cone correlating to a correction value for the location bin that is a percentage of the offset value for the calibration point at the center of the base of the correction cone, the percentage being calculated based on the first height and a second height measured from the center of the base of the correction cone to an apex of the correction cone; and adjust the estimated received signal strength value at each of the location bins based on the correction value for the location bin; and a wireless access point operable to facilitate collection of the calibration data. - View Dependent Claims (17, 18, 19, 20)
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Specification