Patent ID: 11943732
Assignee: LG ELECTRONICS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A user equipment (UE) operating in a wireless communication system, the UE comprising:
an RF module configured to transmit and receive a radio signal;
at least one processor functionally connected to the RF module; and
at least one computer memory operationally connected to the at least one processor and storing instructions, when executed by the at least one processor, which configure the at least one processor to perform operations: comprising:
selecting a public land mobile network (PLMN), based on at least one allowable PLMN which is not in a list of forbidden PLMNs;
determining whether an access to the PLMN is allowed based on an access identity related to an access control; and
based on that the access to the PLMN is determined to be allowed, transmitting, to the PLMN, a registration request message; and
receiving, from the PLMN, a response message for the registration request message,

wherein, based on that there is no available PLMN except for at least one PLMN in the list of forbidden PLMNs and based on that the at least one PLMN in the list of forbidden PLMNs is related to a disaster roaming:
the PLMN is selected based on the at least one PLMN in the list of forbidden PLMNs, and

wherein determining whether the access to the PLMN, which is selected based on the at least one PLMN related to the disaster roaming in the list of forbidden PLMNs, is allowed based on the access identity comprises:
among a plurality of access identity numbers related to UE configuration, selecting the access identity equal to an access identity number related to the disaster roaming; and
determining, based on the access identity number related to the disaster roaming, whether the access to the PLMN is allowed.