Adaptive Polygon Computation in Adaptive Enhanced Cell Identity Positioning
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Abstract
A method for provision of position determination assisting data in a cellular communication network comprises establishing (204) of a cell relation configuration for a user equipment. The cell relation configuration comprises cell identities of cells, in which signals fulfil a specific radio condition criterion when received. The method further comprises performing (206) of a high-precision position determination for the user equipment. The establishing and performing steps (204, 206) are repeated a plurality of times. Positioning points belonging to the same cell relation configuration are clustered (208) and a polygon is associated (212) with each result cluster. The association (212) comprises encompassing of a result cluster by a polygon, altering of the polygon corners along defined paths to improve a predetermined criterion, and counteracting that polygon corners are gathering at a minor portion of a circumference. The method finally comprises creating (212) of position determination assisting data comprising a relation between the cell relation configurations and the polygon.
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Citations
51 Claims
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1-26. -26. (canceled)
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27. A method for providing position determination assisting data in a cellular communications network, comprising the steps of:
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establishing a cell relation configuration for a user equipment, said cell relation configuration comprising at least cell identities of cells, in which signals to or from said user equipment fulfill at least a specific radio condition criterion when received; performing a high-precision position determination for said user equipment; repeating said establishing and performing steps a plurality of times; clustering points being results of said high-precision position determinations belonging to the same cell relation configuration in separate result clusters; associating a polygon with at least one of said result clusters, said associating step in turn comprises the steps of; encompassing a first result cluster of said result clusters by a polygon; altering the position of corners of said polygon along defined paths being curves through the original corner position and a single point to improve a predetermined criterion while maintaining at least a predetermined percentage of said results of high-precision position determinations of said first result cluster within the polygon; and counteracting corners of said polygon from gathering at a minor portion of a circumference of said polygon; creating position determination assisting data comprising a relation between said cell relation configurations and said polygon. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. An arrangement for providing position determination assisting data in a cellular communications network, comprising:
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a cell relation configuration determining circuit for establishing a cell relation configuration for a user equipment;
said cell relation configuration comprising at least cell identities of cells, in which signals to or from said user equipment fulfill at least a specific radio condition criterion when received;a high-precision position determining circuit for performing a high-precision position determination for said user equipment; a clustering circuit for clustering points being results of a plurality of said high-precision position determinations belonging to the same cell relation configuration in separate result clusters; and a computing circuit for associating a polygon with at least one of said result clusters, said computing circuit being arranged for; encompassing a first result cluster of said result clusters by a polygon; altering the position of corners of said polygon along defined paths being curves through the original corner position and a single point to improve a predetermined criterion while maintaining at least a predetermined percentage of said results of high-precision position determinations of said first result cluster within the polygon; and counteracting corners of said polygon from gathering at a minor portion of a circumference of said polygon; and an assisting data determining circuit for creating position determination assisting data comprising a relation between said cell relation configurations and said associated polygons. - View Dependent Claims (49, 50, 51)
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Specification