| 摘要 |
PROBLEM TO BE SOLVED: To provide a disaster prevention notification system that reduces the power consumption of a mobile terminal device by eliminating necessity of the acquisition of positional information based on a GPS or the like, and can keep track of the location of the mobile terminal device without requiring such positional information.SOLUTION: First identification information to identify an individual radio broadcast receiver 11 is transmitted from the radio broadcast receiver 11 of which the installation place is known in advance to a main mobile terminal device 12 via short-range radio communication means. Second identification information including the first identification information is transmitted from the main mobile terminal device 12 to presentation means 14 via a mobile terminal network 16, and the first identification information is presented to the presentation means 14. This enables people to learn that the main mobile terminal device 12 is situated in the vicinity of the installation place of the radio broadcast receiver 11 corresponding to the first identification information.SELECTED DRAWING: Figure 1 |
