A method of a network function (NF) entity performing communication in a wireless communication system includes: in case that a first registration request of a user equipment (UE) for a slice is received at an access and mobility function (AMF) entity through a first network, receiving a first slice availability request message for the slice from the AMF entity; determining whether the slice is available for the UE, based on a network slice policy; and transmitting, to the AMF entity, a response message including information regarding slice availability of the UE according to the first registration request, wherein in case that a second registration request of the UE for the slice is received at the AMF entity through a second network, slice availability of the UE according to the second registration request is determined based on at least one of the network slice policy or the information regarding the slice availability of the UE according to the first registration request.

A method of a network function (NF) entity performing communication in a wireless communication system includes: in case that a first registration request of a user equipment (UE) for a slice is received at an access and mobility function (AMF) entity through a first network, receiving a first slice availability request message for the slice from the AMF entity; determining whether the slice is available for the UE, based on a network slice policy; and transmitting, to the AMF entity, a response message including information regarding slice availability of the UE according to the first registration request, wherein in case that a second registration request of the UE for the slice is received at the AMF entity through a second network, slice availability of the UE according to the second registration request is determined based on at least one of the network slice policy or the information regarding the slice availability of the UE according to the first registration request.

Disclosed are a method and device for supporting mobility for a NWDAF in a wireless communication network. The method may comprise the steps of: deciding to transfer analytics subscriptions of a network function (NF); determining a target NWDAF to which the analytics subscriptions are to be transferred, on the basis of at least one among a terminal location, the analytics subscriptions, a consumer NF and a target area; transmitting, to the target NWDAF, a subscription transfer request message including first subscription information related to the analytics subscriptions; receiving, from the target NWDAF, a subscription transfer response message including second subscription information related to at least one analytics subscription, generated on the basis of the first subscription information; and, on the basis of the second subscription information, requesting, to a source NF, subscription cancelation of the corresponding analytics subscription among the at least one analytics subscriptions.

Disclosed are a method and device for supporting mobility for a NWDAF in a wireless communication network. The method may comprise the steps of: deciding to transfer analytics subscriptions of a network function (NF); determining a target NWDAF to which the analytics subscriptions are to be transferred, on the basis of at least one among a terminal location, the analytics subscriptions, a consumer NF and a target area; transmitting, to the target NWDAF, a subscription transfer request message including first subscription information related to the analytics subscriptions; receiving, from the target NWDAF, a subscription transfer response message including second subscription information related to at least one analytics subscription, generated on the basis of the first subscription information; and, on the basis of the second subscription information, requesting, to a source NF, subscription cancelation of the corresponding analytics subscription among the at least one analytics subscriptions.

One disclosure of the present specification provides a method performed by a terminal that performs registration in a non-3rd generation partnership project (3GPP) access. According to the method, the terminal may receive a rejection message including a value of a back-off timer. In addition, the terminal may determine a value of a non-3GPP de-registration timer on the basis of the value of the back-off timer. In this case, the value of the non-3GPP de-registration timer may be determined to be greater than the value of the back-off timer.

One disclosure of the present specification provides a method performed by a terminal that performs registration in a non-3rd generation partnership project (3GPP) access. According to the method, the terminal may receive a rejection message including a value of a back-off timer. In addition, the terminal may determine a value of a non-3GPP de-registration timer on the basis of the value of the back-off timer. In this case, the value of the non-3GPP de-registration timer may be determined to be greater than the value of the back-off timer.

This application discloses a resource allocation method and a related device, to effectively avoid an inter-cell SRS resource conflict. The method in this application includes: A target base station receives a first correspondence from a location management function LMF, where the first correspondence indicates that a first user equipment UE uniquely corresponds to a first SRS resource in a plurality of cells, the plurality of cells include a cell served by the target base station, and the first UE is located in the cell served by the target base station. The target base station allocates the first SRS resource to the first UE based on the first correspondence.

This application discloses a resource allocation method and a related device, to effectively avoid an inter-cell SRS resource conflict. The method in this application includes: A target base station receives a first correspondence from a location management function LMF, where the first correspondence indicates that a first user equipment UE uniquely corresponds to a first SRS resource in a plurality of cells, the plurality of cells include a cell served by the target base station, and the first UE is located in the cell served by the target base station. The target base station allocates the first SRS resource to the first UE based on the first correspondence.

A method is disclosed for improved tracking area planning and handling, comprising: assigning a single tracking area code to a plurality of eNodeBs at a messaging concentrator gateway, the messaging concentrator gateway situated in a network between the plurality of eNodeBs and the core network; storing, at the messaging concentrator gateway, at least one indicator of a last known location of a user equipment (UE) other than the single tracking area code; receiving a paging message from the core network at the messaging concentrator gateway for a UE; and performing a paging sequence using the at least one indicator to identify a set of eNodeBs to page the UE, thereby allowing larger tracking area list sizes to be used without increasing signaling traffic between the radio access network and the core network.

A method is disclosed for improved tracking area planning and handling, comprising: assigning a single tracking area code to a plurality of eNodeBs at a messaging concentrator gateway, the messaging concentrator gateway situated in a network between the plurality of eNodeBs and the core network; storing, at the messaging concentrator gateway, at least one indicator of a last known location of a user equipment (UE) other than the single tracking area code; receiving a paging message from the core network at the messaging concentrator gateway for a UE; and performing a paging sequence using the at least one indicator to identify a set of eNodeBs to page the UE, thereby allowing larger tracking area list sizes to be used without increasing signaling traffic between the radio access network and the core network.