According to an embodiment of the disclosure, the processor 330 may broadcast its SNPN ID and an onboarding indication indicating whether onboarding is supported through the broadcast system information, receive a system information request message transmitted through the onboarding indication received by the UE 200 performing network selection, and transmit a DCS group ID supported by a network to which the processor 330 belongs or a list of DCS group IDs to the UE 200 through the system information message in response to the system information request.

FIG. 8 illustrates a flowchart of a method of discovering and selecting a network by a UE according to an embodiment of the disclosure.

Referring to FIG. 8, at operation 802, a UE may perform configuration for an access mode. The access mode may be the PLMN access mode or the SNPN access mode. At operation 804, the UE 200 may receive system information from the base station (e.g., the 5G-AN 300). The system information may include any one of a PLMN ID or a DCS group ID. At operation 806, the UE 200 having received the system information may determine the base station (e.g., the 5G-AN 300) based on information preconfigured in the UE 200. The preconfigured information may include at least one of a PLMN ID, a DCS group ID, a list of DCS group IDs, or an initial default configuration. At operation 808, the UE 200 may perform network connection through the determined base station (e.g., the 5G-AN 300).

The methods according to the embodiments of the disclosure described in the claims or specification of the disclosure may be implemented by hardware, software, or a combination thereof.