Patent ID: 8208942

Claim:
Method for clustering position determinations for providing position determination assisting data in a cellular communications network, the method comprising: obtaining a main cluster of points being results of high-precision position determinations for different positions of user equipment terminals in communication with the cellular communications network; and separating out the points that are the results of the high-precision position determinations into at least two subclusters of the points, the respective points of each of the subclusters having a local positional density of points above a predetermined local positional density threshold, where said separating out comprises, determining a local positional density of points for each point in said main cluster of points, selecting a point in said main cluster of points having a local positional density of points larger than said predetermined local positional density threshold to be included in a first subcluster, and including points of said main cluster of points in said first subcluster, said points included in said first subcluster having a local positional density of points that is larger than said predetermined local positional density threshold.