| 摘要 |
It is an object of the present invention to obtain a positioning result corresponding to the state of a receiver in less time. A positioning server 10 comprises a reception state information acquisition component 12 that acquires reception state information indicating the reception state of a radio wave at a cellular terminal 20, a base station positioning calculator 13 that estimates the approximate position of the cellular terminal 20 on the basis of reception state information and computes the precision of the approximate position, an end decision component 14 that decides whether or not to end the estimation of position on the basis of the precision of the approximate position, and, if it is decided to end the estimation, estimates the position of the cellular terminal 20 as the approximate position and ends the estimation of the position, an indoor/outdoor determination component 15 that determines whether the cellular terminal 20 is indoors or outdoors on the basis of the reception state information, and a positioning controller 16 that controls the execution of the GPS positioning of the cellular terminal 20 on the basis of the result of decision by the end decision component 14 and the result of determination by the indoor/outdoor determination component 15. |
