Patent ID: 7120417

Claim:
A mobile communications terminal adapted to communicate with a 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 comprising: 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; 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; and a time information generator configured to generate time information indicating a current time, wherein the notification information generator generates notification information further including time information generated at the time of receiving the identification information.