System and method for determining the location of a mobile device
First Claim
Patent Images
1. A method for determining the location of a mobile device comprising the steps of:
- (a) receiving at a mobile device a first set of signals from a plurality of radio frequency (“
RF”
) sources;
(b) downconverting at the mobile device the first set of signals into a second set of signals;
(c) time stamping at the mobile device the second set of signals;
(d) transmitting the time stamped signals from the mobile device to a location determining system; and
(e) determining the location of the mobile device at the location determining system as a function of the time stamped signals and as a function of information from a wide area reference network (“
WARN”
),wherein the location determining system is a mobile location center (“
MLC”
) or a location information server (“
LIS”
), andwherein the information is at least one of ephemeris information, ionosphere model information, UTC model information, and combinations thereof.
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Accused Products
Abstract
A system and method for determining the location of a mobile device. A first set of signals from a plurality of radio frequency (“RF”) sources may be received at a mobile device and then downconverted into a second set of signals. The mobile device may then time stamp the second set of signals and transmit the time stamped signals to a location determining system. The location of the mobile device may be determined at the location determining system as a function of the time stamped signals.
108 Citations
24 Claims
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1. A method for determining the location of a mobile device comprising the steps of:
-
(a) receiving at a mobile device a first set of signals from a plurality of radio frequency (“
RF”
) sources;(b) downconverting at the mobile device the first set of signals into a second set of signals; (c) time stamping at the mobile device the second set of signals; (d) transmitting the time stamped signals from the mobile device to a location determining system; and (e) determining the location of the mobile device at the location determining system as a function of the time stamped signals and as a function of information from a wide area reference network (“
WARN”
),wherein the location determining system is a mobile location center (“
MLC”
) or a location information server (“
LIS”
), andwherein the information is at least one of ephemeris information, ionosphere model information, UTC model information, and combinations thereof. - View Dependent Claims (2, 3, 4, 5)
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6. A method for determining the location of a mobile device comprising the steps of:
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(a) transmitting at least one of a location request, a first frequency range, a first sampling duration, a first sampling rate, a first sampling resolution, and a time synchronization from a location determining system to a mobile device; (b) receiving at the mobile device a plurality of signals from a plurality of radio frequency (“
RF”
) sources;(c) downconverting at the mobile device the received plural signals into a plurality of intermediate frequency signals; (d) time stamping the plural intermediate frequency signals at the mobile device; (e) transmitting the time stamped signals from the mobile device to the location determining system; and (f) determining the location of the mobile device at the location determining system as a function of the time stamped signals. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A method for determining the location of a mobile device comprising the steps of:
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(a) transmitting a location request from a mobile device to a location determining system; (b) transmitting at least one of a first frequency range, a first sampling duration, a first sampling rate, a first sampling resolution, and a time synchronization from the location determining system to the mobile device in response to the location request; (c) receiving at a mobile device a plurality of signals from a plurality of radio frequency (“
RF”
) sources;(d) downconverting at the mobile device the received plural signals into a plurality of intermediate frequency signals; (e) time stamping at the mobile device the intermediate frequency signals; (f) transmitting the time stamped signals from the mobile device to the location determining system; and (g) determining the location of the mobile device at the location determining system as a function of the time stamped signals. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A system for determining the location of a mobile device from signals received from a plurality of radio frequency (“
- RF”
) sources comprising;(a) a mobile device having; (i) a receiver for receiving signals from the plural RF sources, (ii) circuitry for downconverting the received signals, (iii) circuitry for time stamping the downconverted signals, and (iv) a transmitter for transmitting the time stamped signals; and (b) a location determining system having; (i) a receiver for receiving signals transmitted from the mobile device, and (ii) circuitry for determining the location of the mobile device as a function of the received signals from the device; and (c) a database having information from a wide area reference network (“
WARN”
),wherein the location determining system is a mobile location center (“
MLC”
) or a location information server (“
LIS”
), andwherein the information is at least one of ephemeris information, ionosphere model information, UTC model information, and combinations thereof. - View Dependent Claims (22, 23, 24)
- RF”
Specification
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Current AssigneeTeleCommunication Systems Inc (Comtech Telecommunications Corporation)
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Original AssigneeAndrew LLC (CommScope Holding Company, Inc.)
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InventorsHarper, Neil, Dawson, Martin
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Primary Examiner(s)Tarcza, Thomas
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Assistant Examiner(s)Mull, Fred H
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Application NumberUS12/272,046Publication NumberTime in Patent Office1,198 DaysField of Search342/357.46, 342/386, 342463-464US Class Current342/357.46CPC Class CodesG01S 19/09 providing processing capabi...G01S 19/246 involving long acquisition ...G01S 19/256 relating to timing, e.g. ti...H04W 4/02 Services making use of loca...H04W 64/00 Locating users or terminals...
