Access admission control method and system for mobile communication system

An access admission control method for a Long Term Evolution (LTE) mobile communication system including a mobile terminal, a femto base station, and a Mobility Management Entity (MME), comprises:

• transmitting, at the mobile terminal, a Non Access Stratum (NAS) request message to the femto base station, the request message including information regarding an identity of the mobile terminal;
• forwarding, at the femto base station, the NAS request message to the MME with a Closed Subscriber Group Identity (CSG ID) of the femto base station;
• and
• accepting, at the MME, access of the mobile terminal to the femto base station when the CSG ID is contained in a white list associated with the mobile terminal.

An access admission control system, comprising:

• a User Equipment (UE) which transmits an access request message, the access request message including information regarding an identity of the mobile terminal;
• a Home evolved Node B (HeNB) which receives the access request message transmitted by the UE and forwards the access request message together with a Closed Subscriber Group Identity (CSG ID) of the HeNB;
• and
• a Mobility management Entity (MME) which receives the access request message and the CSG ID and determining whether to accept or reject the access of the UE based on a white list contained in subscriber information associated with the UE.

An apparatus for determining access to a network, comprising:

• a processor in communication with a memory, the memory including code which when accessed by the processor causes the processor to:
• receive a message from a base station, the message including at least an identity of the base station and an identifier associated with a mobile terminal requesting access to the network;
• access the mobile terminal identifier to obtain a white list of base station identifiers associated with the mobile terminal;
• compare the base station identity from the message with each entry in the white list;
• and
• transmit an accept message to the base station when a match between the base station identity and an entry in the white list is determined.