System and method for single sensor geolocation
First Claim
1. In a method of locating a position of a mobile device using a sensor spaced apart a known distance from a base station in communication with the mobile device, the mobile device providing a signal transmission, the improvement comprising calculating and choosing a set of coordinates for the mobile device relative to the sensor as a function of:
- the known distance from the sensor to the base station;
a range between the mobile device and the base station;
an estimate of base station transmission timing relative to a time source known at the sensor; and
a time of arrival of the signal transmission at the sensor.
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Accused Products
Abstract
A system and method for determining a position of a wireless mobile device. The method comprising the steps of providing one base station in communication with the mobile device, providing a sensor spaced apart a known distance from the base station, and determining the range between the mobile device and the base station. The time of arrival of a signal transmitted from the mobile device is measured at the sensor and a set of coordinates is calculated for the mobile device relative to the sensor as a function of the known distance from the sensor to the base station, the range between the mobile device and the base station, an estimate of base station transmission timing relative to a time source, and the time of arrival. One of the set of coordinates may then be chosen to thereby determine a position of the mobile device relative to the sensor.
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Citations
46 Claims
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1. In a method of locating a position of a mobile device using a sensor spaced apart a known distance from a base station in communication with the mobile device, the mobile device providing a signal transmission, the improvement comprising calculating and choosing a set of coordinates for the mobile device relative to the sensor as a function of:
- the known distance from the sensor to the base station;
a range between the mobile device and the base station;
an estimate of base station transmission timing relative to a time source known at the sensor; and
a time of arrival of the signal transmission at the sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- the known distance from the sensor to the base station;
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16. A method for determining a position of a wireless mobile device comprising the steps of:
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(a) providing one base station in communication with the mobile device; (b) providing a sensor spaced apart a known distance from the base station; (c) determining the range between the mobile device and the base station; (d) measuring the time of arrival at the sensor of a signal transmitted from the mobile device; (e) calculating a set of coordinates for the mobile device relative to the sensor as a function of the known distance from the sensor to the base station, the range, an estimate of base station transmission timing relative to a time source known at the sensor, and the time of arrival; and (f) choosing a one of the set of coordinates to thereby determine a position of the mobile device relative to the sensor. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A system for locating a position of a mobile device comprising a mobile location center in communication with a network having at least one sensor spaced apart a known distance from a base station in communication with the mobile device, the mobile device providing a signal transmission wherein the mobile location center calculates and chooses a set of coordinates for the mobile device relative to the sensor as a function of:
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(i) the known distance from the sensor to the base station; (ii) a range between the mobile device and the base station; (iii) an estimate of base station transmission timing relative to a time source known at the sensor; and (iv) a time of arrival of the signal transmission at the sensor. - View Dependent Claims (41, 42, 43, 44, 45, 46)
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Specification