Patent ID: 8614987

Claim:
A location information acquisition method by which a location information management server, which manages positioning of a mobile station via a U-Plane based positioning using a global positioning system, acquires location information on the mobile station, comprising the steps of: transmitting, from a first radio base station to the mobile station communicating via a first cell under control of the first radio base station, a handover command instructing to perform handover to a second cell under control of a second radio base station; performing, at the mobile station, handover from the first cell to the second cell in response to the handover command; acquiring, at the mobile station, a global cell ID, which can uniquely identify the second cell in at least one mobile communication system, from the handover command; and notifying, from the mobile station to the location information management server, the acquired global cell ID which can uniquely identify the second cell, even though the location information management server manages the positioning of the mobile station via the U-Plane based positioning using the global positioning system.