Patent ID: 8504049

Claim:
A mobile communication system, comprising: a newly-installed base station configured to send an identifier of the newly-installed base station and a pilot channel; one or more existing base stations; one or more user devices configured to send reception quality measurements of the pilot channel to the corresponding existing base stations; and an upper node, wherein each of the existing base stations includes a statistical processing unit configured to perform statistical processing on the reception quality measurements sent from the corresponding user devices, and a statistical processing result reporting unit configured to send a result of the statistical processing to the upper node; the upper node includes a tracking area selecting unit configured to select a tracking area to be assigned to the newly-installed base station based on the results of the statistical processing sent from the existing base stations, and a tracking area reporting unit configured to send information indicating the tracking area selected by the tracking area selecting unit to the newly-installed base station; the newly-installed base station includes a tracking area setting unit configured to set the tracking area of the newly-installed base station based on the information indicating the tracking area sent from the upper node, wherein the statistical processing unit is configured to calculate an average of the reception quality measurements sent from the corresponding user devices, and wherein the statistical processing unit is configured to obtain a cumulative distribution function of the reception quality measurements sent from the corresponding user devices and to obtain a predetermined percent value of the reception quality measurements based on the cumulative distribution function.