Entry restriction scheme for femto abs

PURPOSE: An entry restriction scheme for femto abs is provided to efficiently perform a communication among macro base station, femto base station and the terminal. CONSTITUTION: A non-member terminal receives a preamble and SFH(Super Frame Header) of the CSG(Closed Subscriber Group) closed femto base station(S601). The terminal transmits the ranging code(S602). The terminal receives a ranging acknowledgement message(S603). In case the ranging state is succeed, the terminal transmits the ranging request message to the femto base station(S604). The femto base station always establishes the CSG cell bar of the ranging response message as 1(S605). The terminal does not attempt to enter into the corresponding femto base station.