Altitude determination and distribution in cellular communication systems
First Claim
1. Altitude determination method in a cellular communication system comprising the steps of:
- providing a set of points in a first node in said cellular communication system;
said set of points comprising at least three points located at or near a border of a first cell associated with said first node;
said at least three points each comprising two coordinates of a horizontal plane and an altitude parameter;
transferring a data amount representing said set of points over an interface between said first node and a second node of said cellular communication system; and
processing, in said second node, said data amount to obtain an estimated altitude of any first point belonging to said first cell using coordinates of a horizontal plane of said any first point as input arguments.
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Abstract
In the present invention, data of a digital altitude map of a cell in a cellular communication system is compressed in a first node by defining a polygon essentially representing the boundary of the cell. Each polygon corner is defined by a point having two lateral coordinates and an associated altitude parameter. In this manner a set of at least three points is defined. This set of points constitutes a relatively limited amount of data, which easily can be transferred over an interface to a second node. In the second node, the set of points is used as parameters for creating an altitude model. By using a pair of lateral coordinates as input arguments of the model, an estimation of an associated altitude can be derived.
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Citations
57 Claims
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1. Altitude determination method in a cellular communication system comprising the steps of:
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providing a set of points in a first node in said cellular communication system; said set of points comprising at least three points located at or near a border of a first cell associated with said first node; said at least three points each comprising two coordinates of a horizontal plane and an altitude parameter; transferring a data amount representing said set of points over an interface between said first node and a second node of said cellular communication system; and processing, in said second node, said data amount to obtain an estimated altitude of any first point belonging to said first cell using coordinates of a horizontal plane of said any first point as input arguments. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. Altitude determination method in a node in a cellular communication system comprising the steps of:
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receiving a data amount representing a set of points over an interface; said set of points comprising at least three points located at or near a border of a first cell; said at least three points each comprising two coordinates of a horizontal plane and an altitude parameter; and processing said data amount to obtain an estimated altitude of any first point belonging to said first cell using coordinates of a horizontal plane of said any first point as input arguments. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. Method for provision of altitude information in a node in a cellular communication system comprising the steps of:
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providing a set of points; said set of points comprising at least three points located at or near a border of a first cell being associated with said node; said at least three points each comprising two coordinates of a horizontal plane and an altitude parameter; and sending a data amount representing said set of points over an interface of said cellular communication system by signals in a format including a header that indicates that said data amount represents a polygon with altitude information and a parameter that indicates a number of points forming corners of the polygon. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. Cellular communication system comprising:
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a first node associated with a first cell including means for providing a set of points that includes at least three points located at or near a border of said first cell; said at least three points each comprising two coordinates in a horizontal plane and an altitude parameter; a second node; a communication arrangement for transferring data from said first node to said second node over an interface, whereby said communication arrangement is arranged for transferring a data amount representing said set of points; said second node comprising a processor for processing said data amount for obtaining an estimated altitude of any first point belonging to said first cell using coordinates of a horizontal plane of said any first point as input arguments. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48)
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49. Cellular communication system node associated with a first cell, comprising:
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data processing circuitry for providing a set of points comprising at least three points located at or near a border of said first cell; said at least three points each comprising two coordinates in a horizontal plane and an altitude parameter; a communication arrangement for sending data from said node over an interface, wherein said communication arrangement is arranged for sending a data amount representing said set of points by signals in a format including a header that indicates that said data amount represents a polygon with altitude information and a parameter that indicates a number of points forming corners of the polygon. - View Dependent Claims (50, 51, 52, 53)
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54. Cellular communication system node comprising:
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a communication arrangement for receiving data over an interface; and a processor for processing a data amount received by said communication arrangement that represents a set of points; said set of points comprising at least three points located at or near a border of a first cell; said at least three points each comprising two coordinates in a horizontal plane and an altitude parameter; whereby said processor is arranged to obtain an estimated altitude of any first point belonging to said first cell using coordinates of a horizontal plane of said any first point as input arguments. - View Dependent Claims (55, 56, 57)
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Specification