Device for Locating a Mobile Terminal by Means of Corrected Time-Stamping Signals from Base Stations of an Asynchronous Mobile Network
First Claim
1. Device (D;
- D′
) for location of mobile terminals (UEj) situated in one of the cells (Ci) of an asynchronous mobile communication network (RM) that are controlled by base stations (BTSi), said network (RM) including an assistance server (SA) storing time offsets of clocks of said base stations relative to a reference clock, characterized in that it comprises processing means (MT;
MT′
) adapted, in case of a location request by a mobile terminal (UE1), to collect, on the one hand, signals to be analyzed coming from at least two base stations (BTSi) and including a time stamp representing a chosen time relative to the clock of their base station (BTSi) and, on the other hand, data representing the time offsets of said base stations (BTSi) and to determine a position of said mobile terminal (UE1) by triangulation on the basis of said signals to be analyzed and said collected data.
1 Assignment
0 Petitions
Accused Products
Abstract
The inventive device is used for locating one or several mobile terminals (UE1, UE2, UE3) situated in cells (C1, C2, C3) of an asynchronous mobile communications network (R) controlled by the base stations (BTS1, BTS2, BTS3), wherein said network comprises an assistance server (SA) storing time offsets of clocks of the base stations with respect to a reference clock (for example, the clock of a radio navigation satellite system CS). Said locating device (D) comprises processing means (MT) for collecting, in the case of location request from a mobile terminal (UE1), analysable signals which are received from at least two base stations (BTS1, BTS2, BTS3) and provided with a representative time stamping of a time interval selected with respect to the clock of the base stations thereof and representative data of time offsets of said base stations (BTS1, BTS2, BTS3), and to determine the position of the mobile terminal (UE1) by triangulation on the basis of the analysable signals and collected data.
18 Citations
11 Claims
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1. Device (D;
- D′
) for location of mobile terminals (UEj) situated in one of the cells (Ci) of an asynchronous mobile communication network (RM) that are controlled by base stations (BTSi), said network (RM) including an assistance server (SA) storing time offsets of clocks of said base stations relative to a reference clock, characterized in that it comprises processing means (MT;
MT′
) adapted, in case of a location request by a mobile terminal (UE1), to collect, on the one hand, signals to be analyzed coming from at least two base stations (BTSi) and including a time stamp representing a chosen time relative to the clock of their base station (BTSi) and, on the other hand, data representing the time offsets of said base stations (BTSi) and to determine a position of said mobile terminal (UE1) by triangulation on the basis of said signals to be analyzed and said collected data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- D′
Specification