Method for positioning a mobile station
First Claim
1. A method for positioning a mobile station with the help of base stations in a cellular radio network, characterized in that in order to position a mobile station, it is used at least one base station (103, 104, 105) such that in the positioning, the propagation time of the signals coming from that base station and/or transmitted to that base station from the mobile station is independent of the repeater station delays of certain repeaters (106, 107).
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Accused Products
Abstract
The invention provides a simple and efficient method for positioning a mobile station applying a principle based on signal propagation time differences so that the method uses in the radio signal propagation time measurement those base stations which either do not have functioning repeaters in their coverage areas or, if there are not enough such base stations, the base station delays will be compensated for. The method brings advantage in positioning accuracy compared to a prior-art method such as e.g. an OTD or E-OTD method.
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Citations
30 Claims
- 1. A method for positioning a mobile station with the help of base stations in a cellular radio network, characterized in that in order to position a mobile station, it is used at least one base station (103, 104, 105) such that in the positioning, the propagation time of the signals coming from that base station and/or transmitted to that base station from the mobile station is independent of the repeater station delays of certain repeaters (106, 107).
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20. A mobile station, characterized in that the mobile station comprises:
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means for performing propagation time difference measurements, transceiver means for transferring positioning data between the mobile station and mobile communication network, and means for identifying base stations the signals of which have arrived at the mobile station via a repeater and/or for identifying base stations the signals of which have arrived at the mobile station without repeater involvement. - View Dependent Claims (21)
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22. A base station in a mobile communication network for determining the position of a mobile station, characterized in that said base station comprises
means for performing propagation time difference measurements, transceiver means for transferring positioning data between the mobile station and mobile communication network, and means for identifying base stations which communicate with the mobile station through a repeater and/or for identifying base stations which communicate with the mobile station without repeater involvement.
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24. A positioning center for determining the position of a mobile station, characterized in that said positioning center comprises
means for processing propagation time difference measurement data, transceiver means for transferring positioning data via a mobile communication network to a mobile station and, and means for identifying base stations with which the mobile station communicates through a repeater and/or for identifying base stations with which the mobile station communicates without repeater involvement.
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26. A mobile station positioning system with at least one mobile station, base station and positioning center, characterized in that it comprises the following means:
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means for performing propagation time difference measurements, means for processing propagation time difference measurement data, transceiver means for transferring positioning data between the mobile station and mobile communication network, means for identifying base stations the signals of which have arrived at the mobile station via a repeater and/or for identifying base stations the signals of which have arrived at the mobile station without repeater involvement, memory means for storing propagation time difference measurement data and identification parameters, and memory means for maintaining positioning databases. - View Dependent Claims (27, 28, 29, 30)
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Specification