A closed subscriber group (CSG) is a restricted set of clients with connectivity admittance to a femtocell. Subscribers included in the femtocell’s access control list are allowed to use the femtocell resources when a femtocell is designed in CSG mode. CSG is a bunch of UEs, Subscribers that are permitted for a specific cell. The cell with CSG Indication set to be ‘TRUE’ is called ‘CSG Cell’.