| 摘要 |
A database synchronization system and database synchronization method for acquiring database synchronization between a terminal apparatus and a server apparatus while reducing user's operation load. A mobile communication network server (3) judges the degree of importance of an information element targeted for synchronization, and transmits a synchronization start notification to a mobile terminal (1) corresponding to the judgment result, and database synchronization is performed between the mobile communication network server (3) and mobile terminal (1) after the synchronization start notification. Alternately, the mobile communication network server (3) determines timing of update of the information element, and transmits a synchronization start notification to the mobile terminal (1) corresponding to the determination, and database synchronization is performed between the mobile communication network server (3) and mobile terminal (1) after the synchronization start notification. Then, the mobile terminal (1) receiving the synchronization start notification performs various kinds of representation corresponding to information about the information element included in the synchronization start notification.
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