| 摘要 |
<p>PROBLEM TO BE SOLVED: To make a management device require no setting/management of connection relation (hierarchical structure) between a relay device and terminal device in order to stop a system.SOLUTION: A communication unit 203 included in a management device 200 transmits a stop request. A communication unit 302 included in a relay device 300 returns a response and transfers the stop request. A communication unit 402 included in a terminal device 400 returns a response to the stop request. After that, the terminal device 400 stops. A determination unit 303 included in the relay device 300 determines whether or not a duration in which the stop request is not transferred reaches time T1. The relay device 300 stops when it is determined that the duration reaches the time T1. A determination unit 204 included in the management device 200 determines whether or not the response has already been received at each time T2. The communication unit 203 included in the management device 200 re-transmits the stop request when it is determined that a device from which the response has not been received yet exists. The management device 200 stops when it is determined that responses are already received from all of the devices.</p> |
