System information transmission method and base station, and system information reception method and user equipment

A user equipment (UE) for receiving system information from a base station, the UE comprising:

• a transceiver, and
• a processor configured to control the transceiver, the processor configured to:
• perform a cell search;
• control the transceiver to receive the system information on a found cell based on the cell search,
• wherein the found cell is a long term evolution (LTE) cell connected to an evolved packet core (EPC), and
• wherein the system information includes core network information regarding whether the found cell is connected to a next generation core network (NCN) or not;
• and
• based on the core network information informing that the found cell is connected to the NCN:
• select a core network type among the EPC and the NCN;
• and
• perform an access attempt on the found cell according to the core network type,
• wherein the core network type is selected by a non-access stratum (NAS) layer of the UE.