Patent ID: 7848754

Claim:
A dual band/dual mode mobile communication terminal wirelessly communicating with an asynchronous mobile communication network and a synchronous mobile communication network, comprising: an antenna for transmitting/receiving radio waves to/from the asynchronous mobile communication network and the synchronous mobile communication network; an asynchronous Radio Frequency (RF) device for performing asynchronous communication with the asynchronous mobile communication network through the antenna; a synchronous RF device for performing synchronous communication with the synchronous mobile communication network through the antenna; and a common module for providing common resources to the synchronous and asynchronous RF devices at the time of wirelessly communicating with the synchronous and asynchronous mobile communication networks through the synchronous and asynchronous RF devices, the common module including a main processor adapted to perform overall control for synchronous and asynchronous communication of the mobile communication terminal and to execute applications, wherein the main processor is configured to set the asynchronous mobile communication network for initial access when power is supplied and wait for reception of a signal from the asynchronous mobile communication network so as to perform location registration with the asynchronous mobile communication network if the signal has been received, and to set the asynchronous RF device to a parked mode and activate the synchronous RF device if the waiting for reception from the asynchronous mobile communication network has exceeded a preset reference time so as to perform location registration with the synchronous mobile communication network in response to reception of a signal from the synchronous mobile communication network through the synchronous RF device.