Abstract: The present invention relates to an authentication system, a small base station, and an authentication method which allow a server side to authenticate whether an installation position of a small base station is valid or not. In a packet to be sent as an authentication request from the femto base station 1, in-IC card information of an IC card inserted into the femto base station 1 is contained. A network terminating device 2 converts a local IP address described in a header of the packet to a global IP address, and sends it to a femto concentrator 4. The femto concentrator 4 generates authentication information by associating the in-IC card information with the global IP address, and sends it to an authentication server 5. The authentication server 5 determines that the installation position of the femto base station 1 is valid if the in-IC card information and global IP address included in the authentication information have been associated with each other and registered in an authentication table.

Abstract: A communication system for solving a problem, in which secure communications security cannot be ensured in communications between a femtocell base station and UE, is provided. The communication system includes UE (User Equipment) and an HLR (Home Location Register) used in an IMS (IP Multimedia subsystem) network and a femtocell base station (Femto AP) that constructs a predetermined communication area. The femtocell base station exists between the UE and the HLR, acquires a concealment key corresponding to the UE from the HLR during authentication of the UE, and executes a concealment process to conceal the identity of the UE based on the concealment key.

Abstract: The present invention relates to an authentication system, a small base station, and an authentication method which allow a server side to authenticate whether an installation position of a small base station is valid or not. In a packet to be sent as an authentication request from the femto base station 1, in-IC card information of an IC card inserted into the femto base station 1 is contained. A network terminating device 2 converts a local IP address described in a header of the packet to a global IP address, and sends it to a femto concentrator 4. The femto concentrator 4 generates authentication information by associating the in-IC card information with the global IP address, and sends it to an authentication server 5. The authentication server 5 determines that the installation position of the femto base station 1 is valid if the in-IC card information and global IP address included in the authentication information have been associated with each other and registered in an authentication table.

Abstract: A communication system for solving a problem, in which secure communications security cannot be ensured in communications between a femtocell base station and UE, is provided. The communication system includes UE (User Equipment) and an HLR (Home Location Register) used in an IMS (IP Multimedia subsystem) network and a femtocell base station (Femto AP) that constructs a predetermined communication area. The femtocell base station exists between the UE and the HLR, acquires a concealment key corresponding to the UE from the HLR during authentication of the UE, and executes a concealment process to conceal the identity of the UE based on the concealment key.