Patent ID: 8463268

Claim:
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 which receives, from the cells, cell information including identification information of the position registration areas to which the cells belong; a detector which detects identification information of one of the position registration areas where previous position registration has been executed; a position registration area memory unit which stores said identification information detected by the detector in a position registration area memory; a cell information memory unit which stores, in a cell information memory, the identification information of the position registration areas included in the cell information and identification information of the cells in association with each other if the cell information is received from the cells; and a controller which controls the receiver to specify a cell belonging to said one of the position registration areas of said identification information stored by the position registration area memory unit and receive the cell information from the cell with priority, based on the information stored by the position registration area memory unit and the information stored by the cell information memory unit, wherein the position registration area memory unit further stores reject information indicating whether a reject signal for rejecting connection has been received from the cell belonging to said position registration area where the previous position registration has been executed, and the controller is arranged so that, if the reject information is received the cell, the controller controls the receiver to specify the cell belonging to said position registration area of said identification information stored by the position registration area memory unit and receive the cell information from the cell with non-priority, based on the information stored by the position registration area memory unit and the information stored by the cell information memory unit, and if the reject information is not received from the cell, the controller controls the receiver to specify the cell belonging to said position registration area of said identification information stored by the position registration area memory unit and receive the cell information from the cell with priority based on the information stored by the position registration area memory unit and the information stored by the cell information memory unit, wherein, if the cell information is received from the cell with priority, the controller controls the receiver not to execute new position registration with respect to the cell, and if new cell information from another cell is received, the controller controls the receiver to execute new position registration with respect to said another cell.