Determination of mobile terminal position
First Claim
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1. Cellular communications system, comprising:
- a base station associated with a cell;
a position determination node; and
a multitude of measuring units distributed within the cell;
the multitude of measuring units being in communicational connection with the position determination node;
each of the measuring units being arranged to measure properties of signal of uplink radio resource used in the cell and to report the measurements to the position determination node;
the position determination node being arranged to receive the measurement reports and to determine a position of a mobile terminal in the cell based on comparisons between received measurement reports.
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Abstract
A multitude of measurement units is distributed over a cell area in a wireless communications system. The measurements units are instructed to measure properties of uplink signals of radio resources utilized by mobile terminals, whose position is requested. The measurements are in particular embodiments signal strength measures. The measurements are provided to a position determination node, which by comparing the measurements can estimate a position of the mobile terminal. Several opportunities for implementing ordering and reporting routines as well as implementing the communication between the measurement units and the position determination node are provided.
189 Citations
33 Claims
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1. Cellular communications system, comprising:
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a base station associated with a cell;
a position determination node; and
a multitude of measuring units distributed within the cell;
the multitude of measuring units being in communicational connection with the position determination node;
each of the measuring units being arranged to measure properties of signal of uplink radio resource used in the cell and to report the measurements to the position determination node;
the position determination node being arranged to receive the measurement reports and to determine a position of a mobile terminal in the cell based on comparisons between received measurement reports. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. Measuring unit in a cellular communications system, comprising:
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first communication interface, for communication with a position determination node of the cellular communications system;
second communication interface; and
measurement processor, connected to the first and second communication interfaces;
the second communication interface being a radio unit arranged to measure properties of signals of uplink radio resources used in a cell of the cellular communications system in which the measuring unit is situated;
the measurement processor being arranged for preparing measurement reports based on the measure properties;
the measurement processor being further arranged for sending the measurement report to the position determination node via the first communication interface. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. Method for determination of a position of a mobile terminal in a cellular communications system, comprising the steps of:
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measuring, at a multitude of positions, properties of signals of uplink radio resources used by the mobile terminal;
the multitude of positions being distributed within a cell of the cellular communications system;
reporting the measured properties to a position determination node; and
determining a position of the mobile terminal based on comparisons between received measurement reports associated with different positions. - View Dependent Claims (31, 32, 33)
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Specification