UE, core network node, access network node, AMF apparatus, terminal, and method therefor

A method performed by a user equipment (UE), the method comprising:

• sending, to a core network node, a registration request message including first information indicating support for a restriction feature related to simultaneous network slice registration;
• receiving, from the core network node, a registration accept message including second information;
• and
• sending, to the core network node, a registration request message including a Requested Network Slice Selection Assistance Information (Requested NSSAI), after a cell reselection based on the second information and third information,
• wherein the third information indicates a restriction and a list for slicing, and is received in a System Information Block (SIB), and
• wherein the second information is included in subscription information and indicates restrictions related to simultaneous registration of network slices.

A core network node comprising:

• at least one memory;
• and
• at least one processor coupled to the at least one memory and configured to:
• receive, from a user equipment (UE), a registration request message including first information indicating support for a restriction feature related to simultaneous network slice registration;
• receive, from a network function, subscription information including second information indicating restrictions related to simultaneous registration of network slices;
• send, to the UE, a registration accept message including the second information;
• and
• receive, from the UE, a registration request message including a Requested Network Slice Selection Assistance Information (Requested NSSAI), after a cell reselection based on the second information and third information,
• wherein the third information indicates a restriction and a list for slicing, and is provided in a System Information Block (SIB).