Abstract: A mobile terminal device searches a beacon signal sent from an access point through a wireless LAN, and obtains beacon frame information for certification and connection permission. The mobile terminal device then holds network information necessary for data communication with the access point, and measures a period of time between each time the data communication is performed. The mobile terminal device terminates electric power supplied to hardware for performing the data communication with the access point when the data communication is not performed within a predetermined period of time and network connection is terminated. The electric power is supplied to the hardware when it is necessary to send data to the access point through an input operation of the mobile terminal device while the electric power to the hardware is terminated. Accordingly, the mobile terminal device can be frequently disconnected from the network for a very short period of time.

Abstract: A mobile terminal device searches a beacon signal sent from an access point through a wireless LAN, and obtains beacon frame information for certification and connection permission. The mobile terminal device then holds network information necessary for data communication with the access point, and measures a period of time between each time the data communication is performed. The mobile terminal device terminates electric power supplied to hardware for performing the data communication with the access point when the data communication is not performed within a predetermined period of time and network connection is terminated. The electric power is supplied to the hardware when it is necessary to send data to the access point through an input operation of the mobile terminal device while the electric power to the hardware is terminated. Accordingly, the mobile terminal device can be frequently disconnected from the network for a very short period of time.