Process and device for calculating the position of a mobile station, corresponding computer program and memory medium
First Claim
1. Process for calculating the position of a mobile station (MS) belonging to a cellular radiocommunication system, starting from an identifier of a current geographic cell in which the said mobile station is located, characterized in that it includes the following steps:
- calculate a modelled geographic representation (5) of the current cell;
calculate the barycentre (6) of the said modelled geographic representation of the current cell;
calculate an uncertainty area (7), with a predetermined geometric shape, centred on the said barycentre and the area of which is approximately equal to the area of the said modelled geographic representation of the current cell;
and in that the position of the mobile station is defined by the said barycentre, with an uncertainty equal to the said uncertainty area.
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Accused Products
Abstract
The invention relates to a process for calculating the position of a mobile station (MS) belonging to a cellular radiocommunication system, starting from an identifier of a current geographic cell in which the said mobile station is located. The process according to the invention includes the following steps: calculate a modelled geographic representation (5) of the current cell; calculate the barycenter (6) of the said modelled geographic representation of the current cell; calculate an uncertainty area (7), with a predetermined geometric shape, centerd on the said barycenter and the area of which is approximately equal to the area of the said modelled geographic representation of the current cell. The position of the mobile station is defined by the said barycenter, with an uncertainty equal to the said uncertainty area.
12 Citations
12 Claims
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1. Process for calculating the position of a mobile station (MS) belonging to a cellular radiocommunication system, starting from an identifier of a current geographic cell in which the said mobile station is located,
characterized in that it includes the following steps: -
calculate a modelled geographic representation (5) of the current cell;
calculate the barycentre (6) of the said modelled geographic representation of the current cell;
calculate an uncertainty area (7), with a predetermined geometric shape, centred on the said barycentre and the area of which is approximately equal to the area of the said modelled geographic representation of the current cell;
and in that the position of the mobile station is defined by the said barycentre, with an uncertainty equal to the said uncertainty area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11)
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9. Device (1) for calculating the position of a mobile station belonging to a cellular radiocommunication system starting from the identifier of a current geographic cell in which the said mobile station is located,
characterized in that it comprises: -
means of calculating a modelled geographic representation (5) of the current cell;
means of calculating the barycentre (6) of the said modelled geographic representation of the current cell;
means of calculating an uncertainty area (7), with a predetermined geometric shape centred on the said barycentre and the area of which is approximately equal to the area of the said modelled geographic representation of the current cell;
the position of the mobile station being defined by the said barycentre with an uncertainty equal to the said uncertainty area. - View Dependent Claims (10)
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12. Computer program intended for calculating the position of a mobile station (MS) belonging to a cellular radiocommunication system starting from an identifier of a current geographic cell in which the said mobile station is located, the said computer program comprising portions/means/program code instructions recorded on a medium that can be used in a computer, comprising:
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programming means that can be read by a computer to perform the calculation step for a modelled geographic representation (5) of the current cell;
programming means that can be read by a computer to perform the calculation step to determine the barycentre (6) of this said modelled geographic representation of the current cell;
programming means that can be read by a computer to perform the calculation step to determine an uncertainty area (7) with a predetermined geometric shape centred on the said barycentre and the area of which is approximately equal to the area of the said modelled geographic representation of the current cell;
the position of the mobile station being defined by the barycentre, with an uncertainty equal to the uncertainty area.
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Specification