Patent ID: 7174188

Claim:
A mobile terminal for connecting to a plurality of mobile communication systems, and wherein each mobile communication system corresponds to different communication standards, the mobile terminal comprising: a memory configured to store priority information corresponding to the plurality of mobile communication systems; a system acquiring section configured to acquire a first system from the plurality of mobile communication systems with reference to the priority information stored in the memory, and proceed to a standby state; a first determination section configured to detect a first reception quality of a signal transmitted from the first system, and check whether the detected first reception quality satisfies a first condition; a first reacquiring section configured to acquire, from the plurality of mobile communication systems, a second system whose reception quality satisfies a second condition if the first determination section determines that the first reception quality does not satisfy the first condition, and proceed to the standby state; a second determination section configured to detect reception quality of a signal transmitted from at least one system having higher priority information than that of the second system, with reference to the priority information in the standby state, and check whether there is a third system whose reception quality satisfies a third condition; and a second reacquiring section configured to acquire the third system satisfying the third condition if the second determination section determines that there is the third system whose reception quality satisfies the third condition, and proceed to the standby state.