Extended clustering for improved positioning

Method for providing position determination assisting data in a cellular communications network, the method comprising:

• establishing a cell relation configuration for a user equipment;
• said cell relation configuration comprising at least cell identities of cells, in which signals to/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 said performing a plurality of times;
• clustering points being results of said high-precision position determinations belonging to the same cell relation configuration in separate main clusters of points;
• splitting at least one of said separate main clusters of points in subclusters;
• associating an area definition with at least one of said main clusters of points;
• and
• creating position determination assisting data comprising a relation between said cell relation configurations and said associated area definitions.

Arrangement for providing position determination assisting data in a cellular communications network, the arrangement comprising:

• means 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/from said user equipment fulfill at least a specific radio condition criterion when received;
• means for performing a high-precision position determination for said user equipment;
• means for clustering results of said high-precision position determinations belonging to the same cell relation configuration in separate main clusters of points;
• said means for clustering results being further arranged for separating out, from at least one of said separate main clusters of points, at least two subclusters, the points of which having a local density of points above a predetermined local density threshold;
• and
• means for associating an area definition with at least two of said subclusters of said main clusters of points and creating position determination assisting data comprising a relation between said cell relation configurations and said associated area definitions.

Node of a cellular communications network, comprising:

• an arrangement comprising:
• means 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/from said user equipment fulfill at least a specific radio condition criterion when received;
• means for performing a high-precision position determination for said user equipment;
• means for clustering results of said high-precision position determinations belonging to the same cell relation configuration in separate main clusters of points;
• said means for clustering results being further arranged for separating out, from at least one of said separate main clusters of points, at least two subclusters, the points of which having a local density of points above a predetermined local density threshold;
• and
• means for associating an area definition with at least two of said subclusters of said main clusters of points and creating position determination assisting data comprising a relation between said cell relation configurations and said associated area definitions.

Cellular communications network, comprising:

• an arrangement comprising:
• means 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/from said user equipment fulfill at least a specific radio condition criterion when received;
• means for performing a high-precision position determination for said user equipment;
• means for clustering results of said high-precision position determinations belonging to the same cell relation configuration in separate main clusters of points;
• said means for clustering results being further arranged for separating out, from at least one of said separate main clusters of points, at least two subclusters, the points of which having a local density of points above a predetermined local density threshold;
• and
• means for associating an area definition with at least two of said subclusters of said main clusters of points and creating position determination assisting data comprising a relation between said cell relation configurations and said associated area definitions.