Method and system for accessing local network through family base station system by mobile terminal

The invention provides a method and a system for accessing a local network through a family base station system by a mobile terminal. The system comprises a family base station sub-system and a management element of a core network of the mobile terminal. The family base station sub-system is used for sending the identity mark of local gateway module in the family base station sub-system to the management element of the core network. The management element of the core network is used for establishing a GPRS tunnel control bearer with the family base station system according to the identity mark so as to cause the mobile terminal to access the local network through the family base station system. The invention needs no manual configuration; the core network can acquire a corresponding address of local GGSN/PDN GW of the family base station, so that the invention can reduce the complexity of network configuration; and in addition, the invention allows dynamic configuration of the address of local GGSN/PDN GW for the family base station, thereby making the invention be more suitable for the large number of family base equipment, which a position and an operating time cannot be controlled strictly.