User equipment (UE) operating in stand-alone non-public network (SNPN)
By introducing a concept such as an equivalent SNPN, mobility can be improved, service continuity can be improved, NSSAI can be appropriately managed, and an equivalent SNPN list can be appropriately managed. In a case of receiving a registration accept message including an NSSAI inclusion mode via a current access in a current SNPN in a current registration area, a UE also applies the NSSAI inclusion mode to an equivalent SNPN for the current SNPN in the current registration area.
1 . A User Equipment (UE) comprising:
transmission and reception circuitry;
storage circuitry; and
controlling circuitry,
wherein the transmission and reception circuitry is configured to:
transmit a registration request message, including information indicating that the UE supports an equivalent Stand-alone Non-Public Network (SNPN), in a registration procedure; and
receive a registration accept message including an equivalent SNPN list containing an SNPN identity, and
the controlling circuitry is configured to:
store the equivalent SNPN list in the storage circuitry; and
in a case that the registration procedure is not for an emergency service, delete an SNPN identity, that is in a permanently forbidden SNPNs list, from the equivalent SNPN list stored in the storage circuitry.
2 . The UE according to claim 1 , wherein the equivalent SNPN list stored in the storage circuitry is updated at an end of each registration procedure.
3 . The UE according to claim 1 , wherein the controlling circuitry is configured to regard SNPNs in the equivalent SNPN list as equivalent to each other for SNPN selection.
4 . An Access and Mobility Management Function (AMF) comprising:
transmission and reception circuitry;
storage circuitry; and
controlling circuitry,
wherein the transmission and reception circuitry is configured to:
receive, from a User Equipment (UE), a registration request message, including information indicating that the UE supports an equivalent Stand-alone Non-Public Network (SNPN), in a registration procedure; and
transmit, to the UE, a registration accept message as a response message to the registration request message,
the controlling circuitry is configured to include an equivalent SNPN list containing an SNPN identity in the registration accept message as a response message, and
the registration accept message makes the UE delete an SNPN identity, that is in a permanently forbidden SNPNs list, from the equivalent SNPN list stored in the UE in a case that the registration procedure is not for an emergency service.