| 摘要 |
PROBLEM TO BE SOLVED: To estimate a position with high accuracy with simple system configuration using a short-distance communication function. SOLUTION: A plurality of base stations 110 and connection stations 120 are installed within a predetermined area. A mobile radio device moving within the predetermined area has a short-distance radiocommunication function, and whenever it passes by another mobile radio device or the base station, it receives the equipment ID of the mating device and accumulates it as crossing history data. When the mobile radio device moves into a position where it can communicate with the connection station accessible to a position estimating device 150, the accumulated crossing history data is uploaded to the position estimating device. The crossing history data uploaded from the mobile radio device is stored in a crossing history database 155. The position estimating device acquires the installed positions of all the base stations and estimates a moving path of the mobile radio device to be position-estimated, based on the crossing history data directly uploaded from the mobile radio device to be position-estimated, and on crossing history with the mobile radio device to be position-estimated, included in the crossing history data of another mobile radio device. COPYRIGHT: (C)2009,JPO&INPIT |
