In order for the UE to identify the mobile communication provider through the identification information of the mobile communication provider, information about a correspondence between the mobile communication provider and the identification information may be required. In an embodiment of the disclosure, each of mobile communication providers may be assigned a unique global MNO ID to distinguish between all the mobile communication providers. In addition, each of mobile communication providers may be assigned a unique local MNO ID to distinguish between all the mobile communication providers that provide communication services within a certain region (e.g., a country or state). When each mobile communication provider is assigned a local MNO ID, the amount of information (e.g., the number of bits included in a synchronization signal) required to distinguish between mobile communication providers may be small and resources may be utilized more efficiently.
In an embodiment of the disclosure, information about an MNO ID allocated to each mobile communication provider may be previously stored in a UE. Alternatively, only an MNO ID of a mobile communication provider providing a communication service to a UE may be stored in the UE. Alternatively, a base station of the mobile communication provider may transmit the MNO ID to the UE. For example, the first base station 10 may transmit information about a unique MNO ID of the first mobile communication provider to a UE. The UE may identify the MNO ID of the first mobile communication provider, based on the information transmitted thereto, and may store the identified MNO ID.