SYSTEM AND METHOD FOR LOCATING UMTS USER EQUIPMENT USING MEASUREMENT REPORTS
First Claim
Patent Images
1. In a method for estimating a location of a wireless device comprising determining an observed time difference of arrival (“
- OTDOA”
) based solely on signals received from plural nodes, the improvement comprising determining the OTDOA using information received from a network measurement report.
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Abstract
A system and method for estimating a location of a wireless device receiving signals from a plurality of nodes of a communication system. A first value may be determined based on a network timing characteristic for one of the nodes, and a second value may be determined based on a network measurement report characteristic. An observed time difference of arrival (“OTDOA”) hyperbola may then be calculated based on the first and second values, and a location of the wireless device estimated as a function of the OTDOA hyperbola.
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Citations
56 Claims
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1. In a method for estimating a location of a wireless device comprising determining an observed time difference of arrival (“
- OTDOA”
) based solely on signals received from plural nodes, the improvement comprising determining the OTDOA using information received from a network measurement report. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- OTDOA”
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9. In a method for estimating a location of a wireless device comprising determining an observed time difference of arrival (“
- OTDOA”
) based solely on signals received from plural nodes and from signals received from a satellite navigation system, the improvement comprising determining the OTDOA using information received from a network measurement report. - View Dependent Claims (10, 11)
- OTDOA”
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12. A method for estimating a location of a wireless device receiving signals from a plurality of nodes of a communication system, the method comprising:
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(a) determining a first value based on a network timing characteristic for one of said nodes; (b) determining a second value based on a network measurement report characteristic; (c) calculating an observed time difference of arrival (“
OTDOA”
) hyperbola based on said first and second values; and(d) estimating a location of said wireless device as a function of said OTDOA hyperbola. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for estimating a location of a wireless device receiving signals from a serving node, a first neighboring node, and a second neighboring node, where each node is a node of a communication system, the method comprising:
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(a) determining a first value based on a first network timing characteristic for said first neighboring node; (b) determining a second value based on a second network timing characteristic for said second neighboring node; (c) determining a third value based on a third network timing characteristic for said serving node; (d) determining a fourth value based on a first network measurement report characteristic; (e) determining a fifth value based on a second network measurement report characteristic; (f) calculating an observed time difference of arrival (“
OTDOA”
) hyperbola based on at least one of said first, second, third, fourth, or fifth value; and(g) estimating a location of said wireless device as a function of said OTDOA hyperbola. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. A system for estimating a location of a wireless device receiving signals from a plurality of nodes of a communication system, comprising:
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circuitry for determining a first value based on a network timing characteristic for one of said nodes; circuitry for determining a second value based on a network measurement report characteristic; circuitry for calculating an observed time difference of arrival (“
OTDOA”
) hyperbola based on said first and second values; andcircuitry for estimating a location of said wireless device as a function of said OTDOA. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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Specification