Mobile communications terminal, service area calculation apparatus and method of calculating service area

A service area calculations apparatus that communicates with a mobile communications terminal, the mobile communications terminal being adapted to communicate with the service area calculation apparatus via a first mobile communication network, the service area calculation apparatus collecting and transmitting information concerning a service area provided by the first mobile communication network and a second mobile communication network including a base station, the mobile communications terminal including:

• a positional information generator configured to generate positional information indicating a current position of the mobile communication terminal, a receiver which receives identification information sent from the base station of the second mobile communication network, via the second mobile communication network, a notification information generator configured to generate notification information including the identification information and the positional information generated at the time of receiving the identification information, and a transmitter which transmits the notification information to the service area calculation apparatus via the first mobile communication network to derive the information concerning the service area, the service area calculations apparatus comprising:
• a receiver which receives the notification information transmitted from the mobile communications terminal via the first mobile communication network;
• a storage device which stores a table indicating the positional information and the identification information associated with each other;
• and
• a calculation device configured to calculate a service area of the base station indicated by the identification information based on a distribution of a position indicated by the positional information in correspondence with the identification information referring to the table.