MOBILE COMMUNICATION SYSTEM, NETWORK DEVICE AND MOBILE COMMUNICATION METHOD

摘要

A mobile communication system 100 has a specific cell configured to use a user line. The mobile communication system 100 includes a line determination unit 22 configured to determine whether or not a communication call uses the user line, by using a line identifier configured to identify a user installed a radio base station managing the specific cell, and a calculation unit 24 configured to calculate a reduction fee to be discounted from a usage fee for the communication call using the user line for the user installed a radio base station managing the specific cell.