Terminal operation method and device in wireless communication system
Disclosed herein is a method for operating a terminal in a wireless communication system, the method may include obtaining, by a terminal, a TAI list from a network, identifying, by the terminal, at least one or more TAs through at least one or more TACs in system information that is broadcast, and transmitting a registration request message to the network according to whether or not there is a TA deleted from the TAI list based on the identified one or more TAs.
1 . A method comprising:
transmitting, by a terminal, a first registration request message to a network;
receiving, by the terminal, a first registration accept message including a tracking area identifier (TAI) list from the network;
receiving, by the terminal, system information from the network,
wherein the system information includes one or more tracking areas (TAs) to which a satellite cell belongs through one or more tracking area codes (TACs);
detecting that a deleted TA is present in the TAI list based on the one or more TAs; and
transmitting a second registration request message to the network based on the deleted TA being present in the TAI list,
wherein, based on the terminal identifying the one or more TACs, an access stratum (AS) layer of the terminal forwards the one or more TACs to a non-access stratum (NAS) layer of the terminal, and the NAS layer of the terminal identifies whether or not the deleted TA is present in the TAI list.
2 . The method of claim 1 , wherein a second registration accept message including updated TAI list information is received from the network, and
wherein the TAI list is updated based on the updated TAI list information.
3 . The method of claim 2 , wherein, based on the one or more TAs being all included in the TAI list, the terminal maintains a connection with the network.
4 . The method of claim 1 , wherein the satellite cell is a cell with a plurality of TAs and is a moving cell orbiting the earth.
5 . The method of claim 4 , wherein, based on the network receiving the plurality of TAs via an interface with the satellite cell, the network determines that the plurality of TAs is identical with the one or more TACs included in the system information.
6 . The method of claim 5 , wherein the network configures all of the plurality of TAs to the terminal, based on the TAI list being included in the plurality of TAs.
7 . A terminal comprising:
at least one processor; and
at least one memory operatively coupled to the at least one processor and storing instructions that, based on being executed by the at least one processor, cause the terminal to perform operations comprising:
transmitting a first registration request message to a network;
receiving a first registration accept message including a tracking area identifier (TAI) list from the network,
receiving system information from the network,
wherein the system information includes one or more tracking areas (TAs) to which a satellite cell belongs through one or more tracking area codes (TACs);
detecting that a deleted TA is present in the TAI list based on the one or more TAs; and
transmitting a second registration request message to the network based on the deleted TA being present in the TAI list,
wherein, based on the terminal identifying the one or more TACs, an access stratum (AS) layer of the terminal forwards the one or more TACs to a non-access stratum (NAS) layer of the terminal, and the NAS layer of the terminal identifies whether or not the deleted TA is present in the TAI list.