System and method for locating UMTS user equipment using measurement reports
First Claim
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1. A method for estimating a location of a wireless device receiving signals from a plurality of nodes of a communication system, the method comprising:
- (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,wherein said plural nodes include a serving node and a neighboring node and wherein the calculating of the OTDOA includes using a second value determined from a difference between a connection frame number (“
CFN”
) of said serving node and a system frame number (“
SFN”
) of said neighboring node, andwherein the estimating of the location of said wireless device includes determining a third value selected from the group consisting of;
a round trip time (“
RTT”
) value, a cell identification value, a signal strength value, and combinations thereof.
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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
54 Claims
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1. 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, wherein said plural nodes include a serving node and a neighboring node and wherein the calculating of the OTDOA includes using a second value determined from a difference between a connection frame number (“
CFN”
) of said serving node and a system frame number (“
SFN”
) of said neighboring node, andwherein the estimating of the location of said wireless device includes determining a third value selected from the group consisting of;
a round trip time (“
RTT”
) value, a cell identification value, a signal strength value, and combinations thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. 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, wherein said plural nodes include a serving node and a neighboring node and wherein said circuitry for calculating the OTDOA includes circuitry for using a second value determined from a difference between a connection frame number (“
CFN”
) of said serving node and a system frame number (“
SFN”
) of said neighboring node, andwherein said circuitry for estimating the location of said wireless device includes circuitry for determining a third value selected from the group consisting of;
a round trip time (“
RTT”
) value, a cell identification value, a signal strength value, and combinations thereof. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. 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, wherein said plural nodes include a serving node, a first neighboring node, and a second neighboring node, and wherein the calculating of the OTDOA includes using a second value determined from a difference between a system frame number (“
SFN”
) of said first neighboring node and a SFN of said second neighboring node, andwherein the estimating of the location of said wireless device includes determining a third value selected from the group consisting of;
a round trip time (“
RTT”
) value, a cell identification value, a signal strength value, and combinations thereof. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. 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, wherein said plural nodes include a serving node, a first neighboring node, and a second neighboring node, and wherein said circuitry for calculating the OTDOA includes circuitry for using a second value determined from a difference between a system frame number (“
SFN”
) of said first neighboring node and a SFN of said second neighboring node, andwherein said circuitry for estimating the location of said wireless device includes circuitry for determining a third value selected from the group consisting of;
a round trip time (“
RTT”
) value, a cell identification value, a signal strength value, and combinations thereof. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54)
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Specification
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Current AssigneeCommScope Technologies, LLC (CommScope Holding Company, Inc.)
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Original AssigneeAndrew LLC (CommScope Holding Company, Inc.)
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InventorsMazlum, Selcuk, Carlson, John, Islam, Tariqul
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Primary Examiner(s)Addy, Anthony
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Assistant Examiner(s)Chambers, Tangela T.
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Application NumberUS12/104,250Publication NumberTime in Patent Office1,861 DaysField of Search4554561-4562, 455/404.2US Class Current455/456.1CPC Class CodesG01S 19/46 the supplementary measureme...G01S 5/0205 DetailsG01S 5/10 Position of receiver fixed ...H04W 24/10 Scheduling measurement repo...H04W 64/00 Locating users or terminals...H04W 84/04 Large scale networks; Deep ...
