Method and a system in positioning, and a device
First Claim
1. A method for positioning a device, comprising:
- performing measurements to determine at least the range between a first positioning station and the device and to determine at least the range between a second positioning station and the device, and in which at least one measurement defines a geometric surface for the position of the device, and which first positioning station and second positioning station belong to different systems, selecting a geometric model on the basis of the measurements, the model comprising, at the most, quadratic surfaces, simplifying the selected geometric model to reduce the number of quadratic surfaces, inserting the measurement results in a simplified geometric model, and determining the position of the device by solving the simplified geometric model.
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Abstract
The invention relates to a method and a system for determining the position of a device (1) by taking measurements to determine the range between at least a first positioning station (2) and the device (1) and to determine the range between at least a second positioning station (3) and the device (1). At least one measurement defines a geometric surface for the position of the device (1). Said first positioning station (2) and second positioning station (3) belong to different systems. In the invention, the measurements are used to select a geometric model which comprises, at the most, quadratic surfaces, the selected geometric model is simplified to reduce the number of quadratic surfaces, the measurement results are inserted in the simplified geometric model, and the position of the device (1) is determined by solving the simplified geometric model. The invention also relates to a device (1) and a program in which the method is applied, as well as to a storage means for storing the program.
27 Citations
29 Claims
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1. A method for positioning a device, comprising:
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performing measurements to determine at least the range between a first positioning station and the device and to determine at least the range between a second positioning station and the device, and in which at least one measurement defines a geometric surface for the position of the device, and which first positioning station and second positioning station belong to different systems, selecting a geometric model on the basis of the measurements, the model comprising, at the most, quadratic surfaces, simplifying the selected geometric model to reduce the number of quadratic surfaces, inserting the measurement results in a simplified geometric model, and determining the position of the device by solving the simplified geometric model. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for positioning a device, comprising:
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means for taking measurements to determine at least the range between a first positioning station and the device and to determine at least the range between a second positioning station and the device;
means for defining a geometric surface for the position of the device on the basis of at least one measurement, said first positioning station and second positioning station belonging to different systems;
means for selecting a geometric model comprising, at the most, quadratic surfaces on the basis of the measurements;
means for simplifying the selected geometric model to reduce the number of quadratic surfaces;
means for inserting the measurement results in the simplified geometric model; and
means for solving the simplified geometric model to define the position of the device. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A device comprising:
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means for taking measurements to determine at least the range between a first positioning station and the device and to determine at least the range between a second positioning station and the device;
means for defining a geometric surface for the position of the device on the basis of at least one measurement, said first positioning station and second positioning station belonging to different systems;
means for selecting, on the basis of the measurements, a geometric model comprising, at the most, quadratic surfaces;
means for simplifying the selected geometric model to reduce the number of quadratic surfaces;
means for inserting the measurement results in the simplified geometric model; and
means for solving the simplified geometric model to define the position of the device. - View Dependent Claims (23, 24, 25, 26)
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27. A mobile communication device comprising:
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means for taking measurements to determine at least the range between a first positioning station and the device and to determine at least the range between a second positioning station and the device;
means for defining a geometric surface for the position of the device on the basis of at least one measurement, said first positioning station and second positioning station belonging to different systems;
means for selecting, on the basis of the measurements, a geometric model comprising, at the most, quadratic surfaces;
means for simplifying the selected geometric model to reduce the number of quadratic surfaces;
means for inserting the measurement results in the simplified geometric model; and
means for solving the simplified geometric model to define the position of the device.
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28. A program which comprises machine executable program commands for positioning a device, which program comprises program commands for taking measurements to determine at least the range between a first positioning station and the device and to determine at least the range between a second positioning station and the device, and wherein at least one measurement defines a geometric surface for the position of the device, and said first positioning station and second positioning station belonging to different systems, wherein the program also comprises program commands for
selecting, on the basis of measurements, a geometric model which comprises, at the most, quadratic surfaces, simplifying the selected geometric model to reduce the number of quadratic surfaces, inserting the measurement results in the simplified geometric model, and determining the position of the device by solving the simplified geometric model.
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29. A storage means for storing a program which comprises machine executable program commands for positioning a device, which program comprises program commands for taking measurements to determine at least the range between a first positioning station and the device and to determine at least the range between a second positioning station and the device, and wherein at least one measurement defines a geometric surface for the position of the device, and said first positioning station and second positioning station belonging to different systems, wherein the program stored on the storage means also comprises program commands for
selecting, on the basis of measurements, a geometric model which comprises, at the most, quadratic surfaces, simplifying the selected geometric model to reduce the number of quadratic surfaces, inserting the measurement results in the simplified geometric model, and determining the position of the device by solving the simplified geometric model.
Specification