Method for selecting network in wireless communication system
A method of selecting, by a user equipment (UE), a network for performing a registration in a wireless communication system is disclosed. The method includes checking a condition related to a connectivity state of the UE; selecting a first network included in a forbidden public land mobile network (PLMN) list based on the condition related to the connectivity state of the UE; transmitting, to the first network, a registration request message; and receiving, from the first network, a response message as a response to the registration request message.
1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
based on a disaster condition being applied, selecting a first public land mobile network (PLMN) in a forbidden PLMN list; and
performing a registration procedure on the first PLMN,
wherein the disaster condition is related to a service interruption from a second PLMN in a specific region, and
wherein the first PLMN is a PLMN offering disaster roaming services related to a minimization of the service interruption among PLMNs in the forbidden PLMN list.
2. The method of claim 1 , further comprising:
receiving, from the first PLMN, information representing whether the first PLMN is applicable to the disaster condition.
3. The method of claim 1 , wherein the first PLMN is selected based on that there is no available PLMN other than the PLMNs in the forbidden PLMN list.
4. The method of claim 1 , wherein the performing the registration procedure on the first PLMN comprises:
transmitting, to an Access and Mobility management Function (AMF), a registration request message, and
receiving, from the AMF, a registration accept message.
5. The method of claim 1 , wherein the second PLMN is a Home PLMN (HPLMN) to which the UE subscribes.
6. A user equipment (UE) configured to operate in a wireless communication system, the UE comprising:
a transceiver;
a processor configured to control the transceiver; and
a memory operably connected to the processor and storing instructions, when executed by the processor, which configure the processor to perform operations comprising:
based on a disaster condition being applied, selecting a first public land mobile network (PLMN) in a forbidden PLMN list; and
performing a registration procedure on the first PLMN,
wherein the disaster condition is related to a service interruption from a second PLMN in a specific region, and
wherein the first PLMN is a PLMN offering disaster roaming services related to a minimization of the service interruption among PLMNs in the forbidden PLMN list.
7. The UE of claim 6 , wherein the first PLMN is selected based on that there is no available PLMN other than the PLMNs in the forbidden PLMN list.
8. The UE of claim 6 , wherein the second PLMN is a Home PLMN (HPLMN) to which the UE subscribes.