Patent ID: 8072940
Filing Date: 2011-12-06
Classification: H04W

Abstract:
1. A method of controlling a mobile communication terminal that supports a Dual Band Dual Mode (DBDM), the mobile communication terminal having an antenna for transmitting and receiving radio waves to and from a synchronous mobile communication network and an asynchronous mobile communication network, an asynchronous wireless device for performing asynchronous communication with the asynchronous mobile communication network through the antenna, and a synchronous wireless device for performing synchronous communication with the synchronous mobile communication network through the antenna, and the mobile communication terminal being capable of performing wireless communication with the asynchronous mobile communication network and the synchronous mobile communication network, the method comprising: a first step of activating wireless transmission and reception units of the asynchronous wireless device when a data call connection command is inputted; a second step of determining whether the mobile communication terminal is located in a service area of the asynchronous mobile communication network through the wireless transmission and reception units of the activated asynchronous wireless device, before activating an asynchronous modem of the asynchronous wireless device; a third step of activating the asynchronous modem of the asynchronous wireless device if the mobile communication terminal is located in the service area of the asynchronous mobile communication network at the second step; a fourth step of acquiring a Mobile Internet Protocol (MIP address) in the asynchronous mobile communication network through the asynchronous wireless device and performing data service; and a fifth step of performing a handover to the synchronous mobile communication network based on an intensity of a signal of the asynchronous mobile communication network while the fourth step is performed.