| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that the safety information or location information cannot be obtained when communication cannot be established or responded, because a communication network is congested at the time of disaster.SOLUTION: In a network system including a wireless connection device, and an administrative server, the wireless connection device includes a public wireless LAN provision unit for establishing wireless connection with an unspecified communication terminal at the time of disaster when a specific event occurs, and building a public wireless LAN, an information management unit for generating communication terminal information about a first communication terminal located in a range connectable with the wireless connection device at the time of disaster, and a management server communication control unit for transmitting the communication terminal information to the management server only at the time of disaster. The management server includes a disaster communication terminal information generation unit generating the disaster communication terminal information including the positional information about the position of the first communication terminal, based on the communication terminal information received from the wireless connection device at the time of disaster. |
