Patent ID: 8868071

Claim:
A method for initiating a service in a femto base station of a system, the method comprising: broadcasting a closed subscriber group (CSG) indicator; receiving a registration request message from a mobile station having received the CSG indicator, the registration request message including information for specifying the mobile station; forwarding the registration request message to a CSG managing server; adding, if the femto base station receives a registration acceptance message corresponding to the registration request message from the CSG managing server, the information for specifying the mobile station to a CSG registration list stored in the femto base station; searching for the mobile station from the CSG registration list if an attach request message is received from the mobile station; forwarding the attach request message to an access service network (ASN) gateway if the mobile station is in the CSG registration list; and establishing a link message with the mobile station if an attach acceptance message corresponding to the attach request message from the ASN gateway, wherein the information for specifying the mobile station is added to the CSG registration list after receiving the registration acceptance message.