COMPUTING GEOGRAPHICAL LOCATION OF A MOBILE RECEIVER USING NETWORK MEASUREMENT REPORTS
First Claim
1. A method for determining a location of a mobile receiver, the method comprising:
- measuring a plurality of signal strengths received by a mobile receiver, wherein the plurality of signal strengths are associated with a plurality of cellular stations, wherein the plurality of signal strengths is associated with a specific point in time;
combining the plurality of signal strengths with a plurality of signal path modeling parameters to create a propagation path loss model of the path between the plurality of cellular stations and the mobile receiver;
applying a non-linear estimation algorithm to the propagation path loss model;
generating a plurality of distances, wherein each distance is associated with the mobile receiver and each of the plurality of cellular stations; and
computing the location of the mobile receiver by iterating the non-linear estimation algorithm and resulting mobile receiver position until converged.
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Abstract
A method and an apparatus for determining a location of a mobile receiver including the steps of measuring a plurality of signal strengths received by a mobile receiver, wherein the plurality of signal strengths are associated with a plurality of cellular stations, wherein the plurality of signal strengths is associated with a specific point in time, combining the plurality of signal strengths with a plurality of signal path modeling parameters to create a propagation path loss model of the path between the plurality of cellular stations and the mobile receiver, applying a non-linear estimation algorithm to the propagation path loss model, generating a plurality of distances, wherein each distance is associated with the mobile receiver and each of the plurality of cellular stations and computing the location of the mobile receiver by iterating the non-linear estimation algorithm and resulting mobile receiver position until converged.
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Citations
21 Claims
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1. A method for determining a location of a mobile receiver, the method comprising:
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measuring a plurality of signal strengths received by a mobile receiver, wherein the plurality of signal strengths are associated with a plurality of cellular stations, wherein the plurality of signal strengths is associated with a specific point in time; combining the plurality of signal strengths with a plurality of signal path modeling parameters to create a propagation path loss model of the path between the plurality of cellular stations and the mobile receiver; applying a non-linear estimation algorithm to the propagation path loss model; generating a plurality of distances, wherein each distance is associated with the mobile receiver and each of the plurality of cellular stations; and computing the location of the mobile receiver by iterating the non-linear estimation algorithm and resulting mobile receiver position until converged. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for determining a location of a mobile receiver, the method comprising:
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obtaining a network measurement report, wherein the network measurement report comprises a plurality of signal strengths associated with a plurality of cellular stations; combining the network measurement report with a plurality of signal path modeling parameters to create an urban path loss model; applying a Downhill Simplex algorithm to the urban path loss model; generating a plurality of distances, wherein each distance is associated with the mobile receiver and each of the plurality of cellular stations; and computing the location of the mobile receiver.
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17. A system for determining a location of a mobile receiver, the system comprising:
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a plurality of cellular stations; a mobile receiver for determining a plurality of signal strengths associated with the plurality of cellular stations, wherein the plurality of signal strengths are associated with a specific point in time; and a location server for computing a plurality of signal path modeling parameters related to the mobile receiver combining the plurality of signal strengths with the plurality of signal path modeling parameters to create a propagation path loss model, applying a non-linear estimation algorithm to the propagation path loss model, generating a plurality of distances, wherein each distance is associated with the mobile receiver and each of the plurality of cellular stations; and
computing the location of the mobile receiver by iterating the non-linear algorithm and the location computation; anda network for communications between the mobile receiver and the location server. - View Dependent Claims (18, 19, 20, 21)
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Specification