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EP0631453A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method for locating mobile stations in a digital telephone network

Assignee: Telia Co AB
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Filing: 1994-06-02
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Granted: —
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Expires: 2014-06-02
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Abstract

Abstract The invention relates to a method for locating mobile stations in a digital telecommunication network, especially the GSM network. According to the invention, reference measurements are carried out on relevant traffic routes with the aid of a measuring mobile in order to provide position information related to measured signals. With the aid of these reference data and the position information, an adaptive neural network is trained, which network, with the aid of corresponding measurement data which are transmitted from the mobile station to a respective base station, carries out the localisation of the mobile station. Use of the adaptive neural network provides a more accurate position determination than earlier systems which were only based on the TA (timing advance) value.

Inventors

  • 👤 Bo Olsson

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-25 23:55
CPC Classifications
H; H04; H04W; H04W64/00; G; G01; G01S; G01S5/00; G01S5/02; G01S5/0252; G01S5/02521; G01S5/02524; G01S5/02525

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 97 words
Method for locating mobile stations in a digital telecommunication network, characterized in that reference measurements are carried out on relevant traffic routes for providing position information related to measured signals, in that an adaptive neural network is trained with the aid of measured reference data and position information, in that corresponding measurement data are transmitted from the mobile station to a respective base station, and in that the trained adaptive neural network is coupled to the base station and carries out localisation of the mobile station with the aid of the measurement data from the mobile station.
Claim 2
Dependent Claim 48 words
Method according to Claim 1, characterized in that the reference measurements are carried out using a measuring mobile equipped with GPS receiver, the measurement data comprising: received signal strength from the communicating base station with indication of the identity, TA signal and signal strength from neighbouring base stations.
Claim 3
Dependent Claim 46 words
Method according to Claim 1 or 2, characterized in that the adaptive neural network is trained by feeding in all the reference data, calculating a position therefrom, comparing the calculated position with the correct position information, and adjusting the position calculation in dependence on the comparison.

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