Lg Electronics Inc.

Sungduck Chun

Seungjune Yi

Sunghoon Jung

Youngdae Lee

Sungjun Park

Laeyoung Kim

Hyunsook Kim

Sangmin Park

Jaehyun Kim

Myungjune Youn

Taehun Kim

Sung Jun Park

Jinsook Ryu

Young Dae Lee

Seung June Yi

Jaewook Lee

Dongsoo Kim

Young-Dae Lee

Li-Hsiang Sun

Taehyeon Kim

Ki-Dong Lee

Sunhee Kim

Dongjoo Kim

Hanbyul Seo

Sunyoung Lee

Byounghoon Kim

Sangwon Kim

Jian Xu

Kyungjun Lee

Sehee Lee

One disclosure of the present specification provides a method for performing communication by a user equipment (UE). The method comprises the steps of: receiving, from a network, a first message indicating that connection between the UE and a first network slice used by the UE is released, wherein the first message includes time information about a time when the connection is released; and on the basis of the first message, transmitting, to an application of the UE, a second message indicating that the connection is released. The second message includes the time information, and the UE may drive the application by using the first network slice.

Communication method via network slice

Provided are a method for managing a prohibited PLMN list during disaster roaming, and an apparatus supporting same. User Equipment (UE) determines, when there is no available public land mobile network (PLMN) other than PLMNs included in a first list, whether the PLMNs included in the first list can provide a disaster roaming service, and includes in a second list at least one PLMN that can provide the disaster roaming service, from among the PLMNs included in the first list. On the basis that a disaster condition is applied to a home PLMN (HPLMN), the UE i) performs PLMN selection for the at least one PLMN included in the second list, and ii) selects a disaster roaming PLMN from among the at least one PLMN and receives the disaster roaming service provided from the disaster roaming PLMN.

Method for managing prohibited PLMN list during disaster roaming, and apparatus supporting same

A method for performing, by a user equipment (UE), a registration to a network in a wireless communication system is disclosed. Specifically, the UE performs a registration to a first public land mobile network (PLMN) via a first base station, receives an disaster related message applied to the first PLMN or applied to an area in which the UE is located when there is no service provided from the first PLMN, transmits a registration request message to a second PLMN providing an disaster roaming service based on the disaster related message, and receives, from the second PLMN, a response message to the registration request message. The UE is subscribed to the first PLMN, and the second PLMN is configured to provide the disaster roaming service to the UE based on a disaster applied to the first PLMN or applied to the area in which the UE is located.

Method and device for performing registration in network in wireless communication system

One disclosure of the present specification provides a method in which a UE performs communication related to PS Data Off. The method may comprise: a step for transmitting a first PDU session establishment request message in order to establish a PDU session associated with non-3GPP access or 3GPP access; and a step for transmitting a second PDU session establishment request message in order to perform a handover between the non-3GPP access and the 3GPP access for the PDU.

Communication related to PS data off

One disclosure of the present specification provides a communication method of a terminal which must receive a public warning system (PWS) service. The method may comprise the steps of: searching for one or more first stand-alone non-public networks (SNPNs) to which a terminal is subscribed; receiving, from each of the one or more first SNPNs, first PWS information about whether the respective one or more first SNPNs support a PWS service; and, on the basis of the first PWS information, checking whether a specific first SNPN supporting the PWS service is present among the one or more first SNPNs.

PWS service method in NPN

A method for performing, by a user equipment (UE), a registration to a network in a wireless communication system is disclosed. More specifically, the UE performs a registration to a first public land mobile network (PLMN) via a first base station, receives a disaster related message indicating that a disaster roaming service is provided, checks whether the UE is provided with the disaster roaming service based on the disaster related message, selects a second PLMN providing the disaster roaming service when the UE is provided with the disaster roaming service as a result of the check, transmits a registration request message to the selected second PLMN based on the disaster related message, and receives, from the second PLMN, a response message to the registration request message.

Method for allowing registration to network in wireless communication system, and device therefor

One disclosure of the present specification provides a method for performing, by a network node, communication associated with an MA PDU session. The method may comprise the steps of: receiving information indicating that PS data off has been activated for an MA PDU session of a UE; updating a PCC rule on the basis of the information indicating that the PS data off has been activated for the MA PDU session; and transmitting the updated PCC rule to an SMF.

Communication associated with multi-access PDU session

A disclosure of the present specification provides a method of performing communication related to a network slice by a UE. The method may comprise the steps of receiving, from a network, network slice information of a serving cell and network slice information of a neighboring cell; determining that the neighboring cell provides a first network slice that the UE is to use; performing first measurement for a signal of the service cell and second measurement for a signal of the neighboring cell; and determining, on the basis of the first measurement and the second measurement, whether to select the neighboring cell.

Communication related to network slice

A disclosure of the present specification provides a method for performing relay communication by a first UE. The method may comprise the steps of: transmitting a request message including UE ID, relay information, UE type information, and UE public key information to an application server through a 5G core network; receiving, from the application server, a security-related message in response to the request message; establishing a security link with the relay UE on the basis of first credential information; and receiving an IP message for configuring a security channel in an IP layer from a second UE.

Relay communication

One disclosure of the present specification provides a method by which a first network node performs communication on the basis of multiple USIMs. The method can comprise: receiving, from UE, a registration request message including MT service configuration information; receiving, from the UE, information informing that the UE leaves a first network including the first network node; receiving, from a second network node, information related to downlink data about the UE; and transmitting a paging message or a failure indication on the basis of the MT service configuration information and the information related to the downlink data.

Communication related to multiple usims

Provided in one embodiment of the present specification is a method by which an IMS AS performs communication related to a MA PDU session. The method can comprise the steps of: receiving, through a P-CSCF and a S-CSCF, a SIP registration message generated by means of UE, the SIP registration message including information that an IMS service is performed through the MA PDU session, and the SIP registration message including state information that the state of a PS data off of the UE is active; receiving, from the S-CSCF, an SIP request message for requesting the IMS service from the UE; checking whether the IMS service corresponds to an exempt service of the PS data off; including the checked result in the SIP request message; and transmitting the SIP request message to a UPF through the S-CSCF and the P-CSCF.

Communication related to multi access PDU session

Disclosed is a method for providing, by a terminal, a communication service in a wireless communication system, the method including: transmitting, to a first network, a first request message for receiving paging of a second network; receiving, from the first network, a first response message as a response to the first request message; and monitoring the second network or switching to the second network to receive the paging from the second network based on the first response message, in which the terminal may be in a registered state in relation to the first network and the second network, and in a connected state in relation to the first network.

Method for providing communication service in wireless communication system

One disclosure of the present specification provides a method for a terminal roaming in a second Public Land Mobile Network (PLMN) to change the connection to a first PLMN to which the terminal is subscribed. The method may include a step for the first PLMN to receive a first message including first information from a base station in the second PLMN. The method may include a step for inspecting whether a procedure for deregistering from the second PLMN is required. The method may include a step for performing the procedure for deregistering from the second PLMN on the basis of the inspection result. The method may include a step for selecting the first PLMN. The method may include a step for performing a procedure for registering to the first PLMN.

Measure for changing PLMN

One disclosure of the present specification provides a method by which a terminal that joined a first public land mobile network (PLMN) performs a connection. The method may comprise a step for transmitting a first request message to a network node through a base station. The base station may be a base station of a second PLMN that broadcasts system information including information about the first PLMN. The method may comprise a step for receiving, from the network node, a first acceptance message for the first request message. The first acceptance message may include information indicating that there is a service failure in the first PLMN. The method may comprise a step for displaying, on a screen of the terminal, information indicating that the terminal is connected to the second PLMN on the basis of the information.

Method and a first device for an access mobility management function of a second public land mobile network (PLMN) providing disaster roaming services in a wireless communication system

Provided are a method for adjusting timer T when disaster roaming occurs, and a device supporting same. When a disaster condition is applied to a home public land mobile network (HPLMN), a user equipment (UE) performs registration with a disaster roaming PLMN. When the registration with the disaster roaming PLMN is performed, a timer for periodically searching for the HPLMN does not operate, and the HPLMN is not searched while the timer does not operate. In addition, the UE re-operates the timer on the basis of the disaster condition no longer being applied to the HPLMN or the UE leaving a disaster area.

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Seoul, South Korea

Sungduck Chun