Patent ID: 7155201

Claim:
A method of managing an Emergency Services Call (ESC) within a mobile network while a subscriber is engaged in an on-going call, wherein the network includes a serving entity, an anchor entity, a Position Determination Entity (PDE), and an Emergency Services Entity (ESE), the method comprising the steps of: handing off the on-going call from the anchor entity to the serving entity; responsive to an emergency condition, the subscriber invoking the ESC via 3-way calling while maintaining the on-going call; receiving a request for the ESC at the serving entity; receiving a request for a current geographic position of the subscriber at the PDE; determining the current geographic position of the subscriber by the PDE; receiving the current geographic position of the subscriber at the serving entity; sending the current geographic position to the anchor entity; setting up the ESC between the anchor entity and the ESE, wherein the current geographic position is included in the call setup message; and updating the anchor entity with the current geographic position.