Patent ID: 8195202

Claim:
A method in a positioning node for providing a reference location estimate for Assisted Global Positioning System (AGPS) positioning of a portable communication device when a serving cell of the portable communication device is unknown to the positioning node, said method comprising: receiving from the portable communication device via a network node a data list of cells that are neighbors to the serving cell; determining whether the location of any one of the neighbor cells is known to the positioning node; determining whether there is a cell in the data list of cells that has the same Location Area Code (LAC) as the serving cell of the portable communication device, based on whether the location of any one of the neighbor cells is known to the positioning node; identifying a fixed point of location within a geographical area that is being served by the positioning node, based on whether the location of any one of the neighbor cells is known to the positioning node, and based on whether there is a cell in the data list of cells that has the same LAC as the serving cell of the portable communication device; and setting the reference location estimate for AGPS positioning of the portable communication device, based at least on whether the location of any one of the neighbor cells is known to the positioning node.