RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION MEANS

PROBLEM TO BE SOLVED: To reduce circuit load related to authentication registration and position registration of a terminal. SOLUTION: In the radio communication system, an area A1 of a base station 20-1 and an area A3 of a base station 20-3 are integrated to be a single area A, and an area A2 of a base station 20-2 and an area A4 of a base station 20-4 are integrated to be a single area B. A terminal 10, when moving into the base station 20-1 in the area A, requires simplified authentication and position registrations which only transmit authentication information. On the contrary, if the terminal 10 crosses over a calling unit area to move to a different area B, the authentication and position registrations, those of conventional one, are required. An authentication server 40-1, when receives a position registration request from the terminal 10, analyzes authentication information. If the terminal is identified, it performs a simplified authentication and position registration for a position registration DB40-2. COPYRIGHT: (C)2009,JPO&INPIT