Method of determining the position of a mobile station on the basis of propagation models
First Claim
1. A method of estimating the position of a mobile station in a mobile radio network on the basis of propagation models, wherein at the mobile station the field strength of a plurality of base stations connected to the mobile station is measured, the distance between the mobile station and each of the base stations connected to the mobile station is estimated on the basis of a propagation model, and the estimated distances are stored, wherein the estimated distances are filtered and the position of the mobile station is estimated on the basis of the filtered estimated distances.
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Abstract
In a method of estimating the position of a mobile station (2) in a mobile radio network (1) on the basis of propagation models, at the mobile station (2) the field strength of a plurality of base stations (6-8) connected to the mobile station (2) is measured, the distance between the mobile station (2) and each of the base stations (6-8) connected to the mobile station (2) is estimated on the basis of a propagation model, and the estimated distances are stored, the estimated distances being filtered and the position of the mobile station (2) being estimated on the basis of the filtered estimated distances. In a further development the propagation model used can be adapted on the basis of the measured field strengths. In this way a more accurate position determination of the mobile station (2) can be effected.
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Citations
9 Claims
- 1. A method of estimating the position of a mobile station in a mobile radio network on the basis of propagation models, wherein at the mobile station the field strength of a plurality of base stations connected to the mobile station is measured, the distance between the mobile station and each of the base stations connected to the mobile station is estimated on the basis of a propagation model, and the estimated distances are stored, wherein the estimated distances are filtered and the position of the mobile station is estimated on the basis of the filtered estimated distances.
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8. A method of estimating the position of a mobile station in a mobile radio network on the basis of propagation models, wherein at the mobile station the field strength of a plurality of base stations connected to the mobile station is measured, the distance between the mobile station and each of the base stations connected to the mobile station is estimated on the basis of a propagation model, and the estimated distances are stored, wherein the distances between the mobile station and the respective base stations are estimated using different values for the fundamental attenuation of the propagation model and the position of the mobile station is determined and stored for each value of the fundamental attenuation, that for each value of the fundamental attenuation the differences between the estimated positions and the estimated distances are determined, and the position which was determined using the smallest sum of the differences is selected.
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9. A mobile radio network with at least one mobile station and with a plurality of base stations for the execution of a method of estimating the position of a mobile station in a mobile radio network on the basis of propagation models, wherein at the mobile station the field strength of a plurality of base stations connected to the mobile station is measured, the distance between the mobile station and each of the base stations connected to the mobile station is estimated on the basis of a propagation model, and the estimated distances are stored, wherein the estimated distances are filtered and the position of the mobile station is estimated on the basis of the filtered estimated distances.
Specification