Patent ID: 8532608
Filing Date: 2013-09-10
Classification: G01S,H04B,H04W

Abstract:
1. A computer-implemented method of determining a location area of a user using a mobile communication terminal in a geographical area covered by a mobile radio network, the method comprising: dividing the geographical area into a plurality of sub-areas; determining for the sub- areas location probabilities, each location probability indicating the probability that the mobile communication terminal is located in the respective sub-area, based on field strengths expected in the sub-areas for antennas located in the geographical area, and based on the antenna used by the mobile communication terminal; and determining at least one ellipse defining the location area, based on the location probabilities of the sub-areas wherein determining the at least one ellipse comprises: defining a single ellipse around a polygon enveloping probable sub-areas having at least a defined minimum location probability; assessing whether the single ellipse defines the location area with a defined minimal density of probable sub-areas; and determining more than one ellipse for defining the location area, otherwise.