User positioning
First Claim
1. A method, comprising:
- obtaining coordinates of a second network element to which a first network element is connected or attached;
retrieving a predetermined non-uniform geographical serving area that is served by the second network element;
detecting a propagation delay of the first network element with respect to the second network element;
determining a propagation delay depending area, which is an area having a distance to the second network element that is determined based on the propagation delay, and a width that is determined based on a detection uncertainty of the propagation delay;
forming an intersection area of the predetermined non-uniform geographical serving area and the propagation delay depending area; and
determining a location estimate of the first network element from the intersection area,wherein the determining the propagation delay depending area comprises using information about a probability density of locations of the first network element.
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Accused Products
Abstract
The invention proposes a method for locating a network element, comprising the steps of obtaining (S1) the coordinates (xS, yS) of a second network element (BTS) to which the first network element (MS) is connected or attached; detecting (S2) a serving area (S), which is served by the second network element (BTS); detecting (S3) a propagation delay of the first network element with respect to the second network element (BTS); determining (S4) a propagation delay depending area (C), which is an area having a distance to the second network element (BTS) based on the propagation delay and a width based on the propagation delay; and forming (S5) an intersection area (I) of the serving area (S) and the propagation delay depending area (C); wherein a location estimate of the first network element (MS) is determined (S6) from the intersection area (I). Thus, an uncertainty area where a first network element is located can be reduced and the location accuracy can be improved.
32 Citations
16 Claims
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1. A method, comprising:
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obtaining coordinates of a second network element to which a first network element is connected or attached; retrieving a predetermined non-uniform geographical serving area that is served by the second network element; detecting a propagation delay of the first network element with respect to the second network element; determining a propagation delay depending area, which is an area having a distance to the second network element that is determined based on the propagation delay, and a width that is determined based on a detection uncertainty of the propagation delay; forming an intersection area of the predetermined non-uniform geographical serving area and the propagation delay depending area; and determining a location estimate of the first network element from the intersection area, wherein the determining the propagation delay depending area comprises using information about a probability density of locations of the first network element. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus, comprising:
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a processor; and a memory including computer program code, the memory and the computer program code configured to with the processor, cause the apparatus at least to obtain coordinates of a second network element, to which a first network element is connected or attached, retrieve a predetermined non-uniform geographical serving area that is served by the second network element, detect a propagation delay of the first network element with respect to the second network element, determine a propagation delay depending area, which is an area having a distance to the second network element which is determined based on the propagation delay and a width which is determined based on a detection uncertainty of the propagation delay, form an intersection area of the predetermined non-uniform geographical serving area and the propagation delay depending area, and determine a location estimate of the first network element from the intersection area, wherein the memory and the computer program code are configured to, with the processor, cause the apparatus at least to determine the propagation delay depending area using information about a probability density of locations of the first network element. - View Dependent Claims (9, 10, 11, 12, 14)
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13. An apparatus, comprising:
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a serving area determining means for obtaining coordinates of a second network element, to which a first network element is connected or attached, and for retrieving a predetermined non-uniform geographical serving area that is served by the second network element; a propagation delay depending area detecting means for detecting a propagation delay of the first network element with respect to the second network element, and for determining a propagation delay depending area, which is an area having a distance to the second network element which is determined based on the propagation delay and a width which is determined based on a detection uncertainty of the propagation delay; and a location estimating means for forming an intersection area of the predetermined non-uniform geographical serving area and the propagation delay depending area, and for determining a location estimate of the first network element from the intersection area, wherein the propagation delay depending area detecting means determines the propagation delay depending area using information about a probability density of locations of the first network element. - View Dependent Claims (15)
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16. A computer readable medium having computer executable components for performing a method, comprising:
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obtaining coordinates of a second network element to which a first network element is connected or attached; retrieving a predetermined non-uniform geographical serving area that is served by the second network element; detecting a propagation delay of the first network element with respect to the second network element; determining a propagation delay depending area, which is an area having a distance to the second network element that is determined based on the propagation delay, and a width that is determined based on a detection uncertainty of the propagation delay; forming an intersection area of the predetermined non-uniform geographical serving area and the propagation delay depending area; and determining a location estimate of the first network element from the intersection area, wherein the determining the propagation delay depending area comprises using information about a probability density of locations of the first network element.
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Specification