Mobile radio terminal apparatus

• US 20060270402A1
• Filed: 05/24/2006
• Published: 11/30/2006
• Est. Priority Date: 05/27/2005
• Status: Active Grant

• Current Assignee: Fujitsu Mobile Communications Limited (Fujitsu Limited)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Kubo, Yoshiyuki
• Granted Patent: US 8,463,268 B2
• Time in Patent Office: Days
• US Class Current: 455/425
• CPC Class Codes: H04W 52/0254 detecting a user operation or a tactile contact or a motion of the device
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
• CPC Class Codes: H04W 60/04 using triggered events
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A control unit stores identification information of a cell which has received cell information and identification information of a position registration area to which the cell belongs, in association with each other, in a cell information storage area, and stores identification information of a position registration area where previous position registration has been executed, in a position registration area storage area. Then, the control unit receives, with priority, the cell information relating to the cell stored in the cell information storage area, which has been detected and which belongs to the position registration area where previous position registration has been executed.

Claims

1. A mobile radio terminal apparatus, for use in a mobile radio communications system including a plurality of cells belonging to different position registration areas, to make radio communications through the cells, the apparatus comprising:

a receiver for receiving from the cells cell information including identification information of the position registration areas to which the cells belong;

a position registration area memory for storing the identification information of one of the position registration areas where previous position registration has been executed;

a cell information memory for storing the identification information of the position registration area included in the cell information and the identification information of the cells in association with each other if the cell information is received from the cells; and

a controller for controlling the receiver to specify the cell belonging to the position registration area stored by the position registration area memory and receive the cell information from the cell with priority, on the basis of the information stored by the position registration area memory and the information stored by the cell information memory.

2. The mobile radio terminal apparatus according to claim 1, wherein the controller controls the receiver to specify the cell belonging to the position registration area stored by the position registration area memory and receive the cell information from the cell with priority when the identification information of the position registration area included in the received cell information is stored in the position registration area memory.

3. The mobile radio terminal apparatus according to claim 1, wherein the controller controls the receiver to receive anew from the cells cell information including identification information of the position registration areas to which the cells belong when the identification information of the position registration area included in the received cell information is not stored in the position registration area memory.

4. The mobile radio terminal apparatus according to claim 1, wherein if reject information to reject connection is received, the controller controls the receiver to specify the cell belonging to the position registration area stored by the position registration area memory and receive the cell information from the cell with non-priority, on the basis of the information stored by the position registration area memory and the information stored by the cell information memory.

5. A mobile radio terminal apparatus, for use in a mobile radio communications system including a plurality of cells belonging to different position registration areas, to make radio communications through the cells, the apparatus comprising:

a cell detection means for detecting the cells;

a receiver for receiving from the detected cells cell information including identification information of the position registration areas to which the cells belong;

a position registration area memory for storing the identification information of one of the position registration areas where previous position registration has been executed;

a cell information memory for storing the identification information of the position registration area included in the cell information and the identification information of the cells in association with each other if the cell information is received from the cells; and

a controller for repeatedly controlling the cell detection means to detect the cell belonging to the position registration area stored by the position registration area memory, on the basis of the information stored by the position registration area memory and the information stored by the cell information memory, controlling the receiver to receive the cell information from the cell if the cell is detected while the repeated control is executed at number of times equal to or smaller than a preset number of times or controlling the receiver to receive the cell information from any one of the cells other than the cell belonging to the position registration area stored by the position registration area memory if the cell is not detected by executing the repeated control at the number of times.

6. A mobile radio terminal apparatus, for use in a mobile radio communications system including a plurality of cells belonging to different position registration areas, to make radio communications through the cells, the apparatus comprising:

a receiver for receiving from the cells cell information including identification information of the position registration areas to which the cells belong;

a cell detection means for detecting a plurality of cells;

a position registration area memory for storing the identification information of one of the position registration areas where previous position registration has been executed;

a cell information memory for storing the identification information of the position registration area included in the cell information and the identification information of the cells in association with each other if the cell information is received from the cells; and

a controller for controlling the receiver to specify the cell belonging to the position registration area stored by the position registration area memory and on the basis of the information stored by the position registration area memory and the information stored by the cell information memory, and to receive the cell information from the specified cell if the specified cell is included in the plurality of cells detected by the cell detection means.

7. The mobile radio terminal apparatus according to claim 6, wherein the cell detection means detects reception levels of signals from the cells in detecting the cells;

and

if the specified cell is not included in the plurality of cells detected by the cell detection means, the controller receives the cell information from the cell having the highest reception level, of the cells detected by the cell detection means.