WIRELESS COMMUNICATION SYSTEM, NETWORK, AND MOBILE TERMINAL USED FOR THE WIRELESS COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To enable communication by using a plurality of communication systems and selecting the communication system available on a spot, wherever the mobile terminal is moved. SOLUTION: Base stations BS1-1, BS1-2, BS1-3, etc., of a communication system 1 belong to a sub net 1 and the sub net 1 is connected to the Internet via a gateway GW1. Furthermore, base stations BS2-1, BS2-2, BS2-3, etc., of a communication system 2 belong to a sub net 2 and the sub net 2 is connected to the Internet via a gateway GW2. A mobile terminal 20 uses either of the communication systems 1, 2 to make communication with a server. In this case, the mobile terminal 20 is configured with mobile station network interfaces MS1, MS2 accessible to the communication systems 1, 2 and uses a communication system changeover section to have the communication system switched over.