| 摘要 |
PROBLEM TO BE SOLVED: To provide a location information acquisition method that can periodically acquire location information from each mobile terminal without causing pressing of a call channel to the utmost. SOLUTION: In the system that informs a terminal making a location supervisory request of a mobile terminal about the location of the mobile terminal obtained through an estimate arithmetic operation on the basis of acquired location information, when the location information notice terminal acquires the location information from the mobile terminal, the mutual notice consisting of the notice of the location information from the mobile terminal to the location information notice terminal and notice of information from the location information notice terminal to the mobile terminal to specify acquisition timing of the location information is conducted in a message sequence of a call started by the call transmission from the mobile terminal and the mobile terminal starts the message sequence of the one call for the mutual notice from the call transmission by the mobile terminal when the mobile terminal detects the timing for information of the location information on the basis of the information identifying the acquisition timing of the location information reported from the location information notice terminal. |
