System and method to obtain calibration data using estimation techniques
First Claim
1. A method of determining calibration data of a candidate location in a non-calibrated sub-region of a calibrated geographical region the method comprising:
- determining the candidate location in the non-calibrated sub-region to obtain calibration data;
obtaining calibration data by a calibration data collection device for the calibrated geographical region within communication range of the candidate location;
determining a function to represent at least a portion of the calibration data of the calibrated geographical region; and
estimating the calibration data at the candidate location based on the function,wherein the function represents a varying power level of one or more signals received from at least one neighboring base station over a distance beginning at a first location adjacent to the candidate location and within the calibrated geographical region, and ending at a second location different from the first location and also within the calibrated geographical region.
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Abstract
A system and method of determining calibration data at non-calibrated location points is disclosed. A mobile station may be geo-located at most locations, if not all locations, within communication range of one or more serving and/or neighboring base stations of a mobile network. Calibration data may be collected and stored in memory via a data collection procedure. Known calibration data for locations proximate to the mobile station may be necessary when attempting to geo-locate the mobile station. A geographical region may be calibrated via a standard calibration data collection procedure, however, various obstacles, such as, buildings, mountains, ponds etc. may inevitably create deficiencies in the calibration data for one or more areas of the region. Certain techniques may be applied to estimate the calibration data of areas that have not been properly calibrated.
157 Citations
17 Claims
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1. A method of determining calibration data of a candidate location in a non-calibrated sub-region of a calibrated geographical region the method comprising:
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determining the candidate location in the non-calibrated sub-region to obtain calibration data; obtaining calibration data by a calibration data collection device for the calibrated geographical region within communication range of the candidate location; determining a function to represent at least a portion of the calibration data of the calibrated geographical region; and estimating the calibration data at the candidate location based on the function, wherein the function represents a varying power level of one or more signals received from at least one neighboring base station over a distance beginning at a first location adjacent to the candidate location and within the calibrated geographical region, and ending at a second location different from the first location and also within the calibrated geographical region. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of determining calibration data of a candidate location in a non-calibrated sub-region of a calibrated geographical region the method comprising:
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determining the candidate location in the non-calibrated sub-region to estimate calibration data; determining a varying power function of signal power received from at least one neighboring base station to represent calibration data of at least a portion of the calibrated geographical region adjacent to the non-calibrated sub-region; and estimating the calibration data at the candidate location based on the function, wherein the varying power function represents the signal power level over a distance, and where the signal power level decreases as the distance away from the neighboring base station increases. - View Dependent Claims (8)
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9. A method of determining calibration data of a candidate location in a non-calibrated sub-region of a calibrated geographic region, the method comprising:
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determining the candidate location in the non-calibrated sub-region to estimate calibration data; determining a varying power function of signal powers received from a plurality of neighboring base stations to represent calibration data of at least a portion of the calibrated geographical region adjacent to the non-calibrated sub-region; determining at least one lowest signal power level of the plurality of signal power levels received; omitting the signal power of the base station that transmitted the lowest signal power level from the varying power function; and estimating the calibration data at the candidate location based on the function, wherein the varying power function represents the signal power level over a distance, and where the signal power level decreases as the distance away from the neighboring base station increases.
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10. A method of determining calibration data of a candidate location in a non-calibrated sub-region in of a calibrated geographic region, the method comprising:
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determining the candidate location in the non-calibrated sub-region to estimate calibration data; obtaining calibration data by a calibration data collection device for the calibrated geographical region within communication range of the candidate location; determining a first function to represent at least a first portion of the calibration data of the calibrated geographical region; determining a second function to represent at least a second portion of the calibration data of the calibrated geographical region, where the second portion is different from the first portion; and estimating the calibration data at the candidate location based on the first and second functions, wherein the first function represents a first signal power level over a first distance along a first vehicle accessible road, and the second function represents a second signal power level over a second distance along a second vehicle accessible road. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A calibration data collection and measurement system comprising:
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a calibration data collection device to collect and store calibration data within a first portion of a geographical region; a computing device to locate a candidate location within a non-calibrated portion of the geographical region, to select a previously calibrated geographical region within communication range of the candidate location, to determine a function to represent at least a portion of the calibration data of the calibrated geographical region, and to estimate the calibration data at the candidate location based on the function, wherein the function represents a varying power level of one or more signals received from at least one neighboring base station over a distance beginning at a first location adjacent to the candidate location and within the calibrated geographical region, and ending at a second location different from the first location and also within the calibrated geographical region. - View Dependent Claims (17)
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Specification