Patent ID: 7096011

Claim:
An electronic apparatus comprising: a communication device which communicates with a mobile device and a plurality of devices via a network, the mobile device being adapted to be wirelessly connected to the network; a control unit configured to determine whether the mobile device is disconnected from the network; a message sending unit configured to send an alarm message to one of the plurality of devices by communication between the one of the plurality of devices and the communication device when the mobile device is disconnected from the network, the one of the plurality of devices being currently powered on; means for monitoring whether a power state of each of the plurality of devices is a power-on state or a power-off state by communication between the communication device and each of the plurality of devices; and means for detecting a power-on device among the plurality of devices based on a result of monitoring the power state of each of the plurality of devices when the mobile device is disconnected from the network, wherein the message sending unit includes means for sending the alarm message to the detected power-on device by communication between the detected power-on device and the communication device.