MOBILE DEVICE POSITION RETRIEVAL SYSTEM AND MOBILE DEVICE POSITION RETRIEVAL METHOD

摘要

PROBLEM TO BE SOLVED: To provide a mobile device position retrieval system with enhanced accuracy that can easily retrieve the position of a mobile device whose position is going to be retrieved.;SOLUTION: The mobile device position retrieval system is characterized in that a wireless base station controller is provided with a means that selects two mobile devices in a soft-handover state within the same cell as that of a mobile device whose current position is to be retrieved, a means that calculates a distance between a wireless base station and the mobile device whose current position is to be retrieved and between the wireless base station and the two mobile devices in the soft-handover state, and a means that transmits the calculated distance to the mobile device whose current position is to be retrieved, and the mobile device whose current position is to be retrieved is provided with a means that calculates the distance between the mobile device whose current position is to be retrieved and the two mobile devices in the soft-handover state on the basis of the distance between the two mobile devices in the soft-handover state and the wireless base station and a delay time difference between the two mobile devices in the soft-handover state.;COPYRIGHT: (C)2002,JPO