Mobile terminal apparatus and system selecting method
First Claim
1. 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.
4 Assignments
0 Petitions
Accused Products
Abstract
In a first standby state, the reception quality of a signal from a system which has established synchronization is detected. If the detected reception quality deteriorates to be less than a threshold value, the destination of synchronization establishment is changed from a first system to a second system. In a second standby state after this system change, the reception quality of a system having a higher priority order of selection than the second system which has established synchronization is detected. If a third system whose detected reception quality exceeds the threshold value is found, the destination of synchronization establishment is changed to this third system again. After that, the first standby state is returned.
7 Citations
10 Claims
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1. 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:
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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. - View Dependent Claims (2)
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3. 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:
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a memory configured to store priority information corresponding to the plurality of mobile communication systems; a system acquiring section configured to select a first system from the plurality of mobile communication systems based upon the priority information stored in the memory, acquire a base station which belongs to the first system, and proceed to a standby state; a first determination section configured to detect a first reception quality of a signal transmitted from the acquired base station in the standby state, and check whether the first reception quality satisfies a first condition; a detection section configured to detect reception quality of a signal transmitted from a base station which belongs to a system, other than the first system, of the plurality of mobile communication systems in the standby state; a first reacquiring section configured to select, from other mobile communication systems, a second system whose reception quality is higher than the first reception quality if the first determination section determines that the first reception quality does not satisfy the first condition, acquire a base station which belongs to the selected second system, and proceed to the standby state; a second determination section configured to detect third reception quality of a signal from a base station belonging to a system having higher priority information than that of the second system with reference to the priority information and check whether there is a third system whose reception quality satisfies a second condition; and a second reacquiring section configured to acquire a base station belonging to the third system if the second determination section detects that there is the third system, and proceed to the standby state. - View Dependent Claims (4, 5, 6, 7)
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8. A mobile terminal for connecting to a plurality of mobile communication systems, each mobile communication system corresponds to different communication standards, comprising:
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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 signals from systems having higher priority information than that of the second system in order 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. - View Dependent Claims (9, 10)
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Specification