Patent ID: 8670443

Claim:
A communication system comprising: a femto-cell base station for defining a predetermined communication area, a relay device for receiving a message transmitted from said femto-cell base station, and a management device for managing an IP address of said relay device, wherein: said relay device comprises a CS (Circuit Switching)—dedicated relay device used for CS services and a PS (Packet Switching)—dedicated relay device used for PS services, said management device comprises a first management device for managing an IP address of said CS-dedicated relay device, and a second management device for managing an IP address of said PS-dedicated relay device, and said femto-cell base station comprises: first establishing means for acquiring the IP address of said CS-dedicated relay device from said first management device, connecting to said CS-dedicated relay device based on the acquired IP address of said CS-dedicated relay device, and establishing a first IPsec Tunnel between said femto-cell base station and said CS-dedicated relay device; and second establishing means for acquiring the IP address of said PS-dedicated relay device from said second management device through said first IPsec Tunnel, connecting to said PS-dedicated relay device based on the acquired IP address of said PS-dedicated relay device, and establishing a second IPSec Tunnel between said femto-cell base station and said PS-dedicated relay device.