Method and system for estimating the position of a mobile device
First Claim
Patent Images
1. A method, comprising:
- collecting location information;
selecting at least one of a plurality of different location methods to provide a location estimate said methods comprising using cell identity information;
determining a first location estimate of a mobile device based on the at least one selected location method, said first location estimate being based on a serving base transceiver station;
determining a virtual base station estimate using at least some of the collected location information, said virtual base station estimate being determined based on the first location estimate of the mobile device and direction information of the serving base transceiver station; and
providing a second location estimate using one of said different location methods based on the first location estimate and the virtual base station estimate, said second location estimate being a location of the mobile device.
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Abstract
A method of estimating the location of a mobile device, comprising the steps of: collecting location information; selecting at least one of a plurality of different location methods to provide a location estimate; and providing a location estimate based on the at least one selected location method.
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Citations
28 Claims
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1. A method, comprising:
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collecting location information; selecting at least one of a plurality of different location methods to provide a location estimate said methods comprising using cell identity information; determining a first location estimate of a mobile device based on the at least one selected location method, said first location estimate being based on a serving base transceiver station; determining a virtual base station estimate using at least some of the collected location information, said virtual base station estimate being determined based on the first location estimate of the mobile device and direction information of the serving base transceiver station; and providing a second location estimate using one of said different location methods based on the first location estimate and the virtual base station estimate, said second location estimate being a location of the mobile device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 23, 24)
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17. A method, comprising:
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collecting location information; selecting at least one of a plurality of different location methods to provide a location estimate said methods comprising using cell identity information; providing a location estimate of the mobile device based on the at least one selected location methods, wherein the location estimate is provided using the following algorithm calculate the total attenuation experienced by a signal transmitted by the i-th BTS while propagating toward a mobile station where i-th level observation is Li) by subtracting from the i-th measured received power, Pir, the maximum power radiated by the i-th BTS, Pit,max;
Li=Pri−
Pt,maxi;
i=1, . . . ,Nstack the level observations from N BTS'"'"'s in vector L;
L=[L1, . . . ,LN]Tsolve the minimization problem; where the cost function F (x,y;
σ
u2) is defined as follows;determining the location of a mobile device dependent on the location estimate.
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18. A method, comprising:
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collecting location information; selecting at least one of a plurality of different location methods to provide a location estimate said methods comprising using cell identity information; and providing a location estimate based on the at least one selected location method, wherein a location estimate is provided using the following algorithm calculate the total attenuation experienced by a signal transmitted by the i-th BTS while propagating toward a mobile station where the i-th level observation is Li by subtracting from the i-th measured received power, Pir, the maximum power radiated by the i-th BTS, Pit,max;
Li=Pri−
Pt,maxi;
i=1, . . . ,Nstack level observations from N BTS'"'"'s in vector L;
L=[L1, . . . ,LN]Tsolve the minimization problem; where the cost function F(x,y) is defined as follows; and Dxy is the domain of existence of x and y/ calculate {circumflex over (σ
)}u2 as
{circumflex over (σ
)}u2=F({circumflex over (x)},ŷ
)determining the location of a mobile device dependent on the location estimate.
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19. A method, comprising:
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collecting location information; selecting at least one of a plurality of different location methods to provide a location estimate said methods comprising using cell identity information; and providing a location estimate based on the at least one selected location method, wherein a location estimate is provided using the following algorithm; calculate the total attenuation experienced by a signal transmitted by the i-th BTS while propagating toward a mobile station where the i-th level observation is Li) by subtracting from the i-th measured received power, Pt, the maximum power radiated by the i-th BTS, Pit,max;
Li=Pri−
Pt,maxi;
i=1, . . . ,Ncalculate the j-th level difference observation by subtracting the j-th level observation from the level observation L1 taken as reference;
Dj=L1−
Lj;
j=2, . . . ,Nstack the N-1 difference of level observations in a vector D;
D=[D2, . . . ,DN]Tsolve the minimization problem Dxy is the domain of existence of x and y, determining the location of the mobile device dependent on the location estimate.
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20. A method, comprising:
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collecting location information; selecting at least one of a plurality of different location methods to provide a location estimate said methods comprising using cell identity information; and providing a location estimate based on the at least one selected location method, wherein a location estimate is provided using an algorithm solving the following equation in x and y; determining the location of a mobile device dependent on the location estimate.
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21. A method, comprising:
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collecting location information; selecting at least one of a plurality of different location methods to provide a location estimate said methods comprising using cell identity information; and providing a location estimate based on the at least one selected location method, wherein a location estimate is provided using an algorithm solving the following equation in x and y; determining the location of a mobile device dependent on the location estimate.
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22. A method, comprising:
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collecting location information; selecting at least one of a plurality of different location methods to provide a location estimate said methods comprising using cell identity information; and providing a location estimate based on the at least one selected location method, wherein a location estimate is provided using an algorithm based on the following equation in x and y; determining the location of a mobile device dependent on the location estimate.
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25. A system, comprising:
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collecting means for collecting location information; selecting means for selecting at least one of a plurality of different location methods to provide a location estimate said methods using cell identity information; location determining means for determining a first location estimate of a mobile device based on the at least one selected location method, said first location estimate being based on a serving base transceiver station; and estimate determining means for determining a virtual base station estimate, using one of said different location methods, said virtual base station estimate being determined based on the first location estimate of the mobile device and direction information of the serving base transceiver station; and providing means for providing a second location estimate based on at least one of the first location estimate and the virtual base station estimate, said second location estimate being an estimate of the location of the mobile device.
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26. A system, comprising:
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a collector configured to collect location information; a selector configured to select at least one of a plurality of different location methods to provide a location estimate, said methods using cell identity information; a determiner configured to determine a first location estimate of a mobile device based on the at least one selected location method, said first location estimate being based on a serving base transceiver station, and further configured to determine a virtual base station estimate using at least some of the collected location information, said virtual base station estimate being determined based on the first location estimate of the mobile device and direction information of the serving base transceiver station; and a provider configured to provide a second location estimate, using one of said different location methods based on the first location estimate and the virtual base station estimate, said second location estimate being an estimate of the location of the mobile device.
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27. Apparatus, comprising:
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a collector configured to collect location information; a selector configured to select at least one of a plurality of different location methods to provide a location estimate, said methods using cell identity information; a determiner configured to determine a first location estimate of the apparatus based on the at least one selected location method, said first location estimate being based on a serving base transceiver station and further configured to determine a virtual base station estimate based on the first location estimate of the apparatus and direction information of the serving base transceiver station; and a provider configured to provide a second location estimate, using one of said different location methods based on the first estimate and the virtual base station estimate, said second location estimate being an estimate of the location of the apparatus.
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28. A computer program embodied on a computer readable medium, said computer program configured to control a processor to perform:
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collecting location information; selecting at least one of a plurality of different location methods to provide a location estimate said location methods comprising using cell identity information; determining a first location estimate of a mobile device based on the at least one selected location method, said first location estimate being based on a serving base transceiver station; determining a virtual base station estimate using at least some of the collected location information, said virtual base station estimate being determined based on the first location estimate of the mobile device and direction information of the serving base transceiver station; and providing a second location estimate using one of said different location methods based on the first location estimate and the virtual base station estimate, said second location estimate being a location of the mobile device.
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Specification