METHOD FOR USING BASE STATION POWER MEASUREMENTS TO DETECT POSITION OF MOBILE STATIONS
First Claim
1. A method of using power measurements from base stations to calculate position of a mobile station, the method comprising:
- providing position coordinates for a plurality of base stations in a mobile phone network;
measuring Received Signal Strength Indicator (RSSI) levels of nearby base stations with a mobile station;
identifying three base stations for which the mobile station measures strongest RSSI levels;
the mobile station receiving the position coordinates of the three identified base stations;
calculating a curved path of possible positions of the mobile station for each of the three identified base stations according to the measured RSSI levels of each of the three identified base stations; and
calculating the position of the mobile station based on the position coordinates of the three identified base stations and the three curved paths of possible positions of the mobile station.
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Abstract
A method of using power measurements from base stations to calculate position of a mobile station. The method includes providing position coordinates for a plurality of base stations in a mobile phone network, measuring Received Signal Strength Indicator (RSSI) levels of nearby base stations with a mobile station, identifying three base stations for which the mobile station measures strongest RSSI levels, the mobile station receiving the position coordinates of the three identified base stations, calculating a curved path of possible positions of the mobile station for each of the three identified base stations according to the measured RSSI levels of each of the three identified base stations, and calculating the position of the mobile station based on the position coordinates of the three identified base stations and the three curved paths of possible positions of the mobile station.
55 Citations
17 Claims
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1. A method of using power measurements from base stations to calculate position of a mobile station, the method comprising:
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providing position coordinates for a plurality of base stations in a mobile phone network;
measuring Received Signal Strength Indicator (RSSI) levels of nearby base stations with a mobile station;
identifying three base stations for which the mobile station measures strongest RSSI levels;
the mobile station receiving the position coordinates of the three identified base stations;
calculating a curved path of possible positions of the mobile station for each of the three identified base stations according to the measured RSSI levels of each of the three identified base stations; and
calculating the position of the mobile station based on the position coordinates of the three identified base stations and the three curved paths of possible positions of the mobile station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of using power measurements from base stations to calculate position of a mobile station, the method comprising:
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providing position coordinates for a plurality of base stations in a mobile phone network;
measuring Received Signal Strength Indicator (RSSI) levels of nearby base stations with a mobile station;
identifying three base stations that have a reliability coefficient above a predetermined threshold level for which the mobile station measures strongest RSSI levels, wherein each base station has the corresponding reliability coefficient due to interference effects associated with that base station;
the mobile station receiving the position coordinates of the three identified base stations;
calculating a curved path of possible positions of the mobile station for each of the three identified base stations according to the measured RSSI levels of each of the three identified base stations; and
calculating the position of the mobile station based on the position coordinates of the three identified base stations and the three curved paths of possible positions of the mobile station. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification