Patent ID: 11870856
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A system, comprising:
a home control plane function entity configured to send, to a terminal during establishment of a packet data network (PDN) connection in a fourth generation (4G) network, home public land mobile operator network (PLMN) single network slice selection assistance information (S-NSSAI) corresponding to the PDN connection; and
an access and mobility management function in a fifth generation (5G) network and configured to:
receive, from the terminal, a registration request comprising the home PLMN S-NSSAI;
obtain, based on visited PLMN S-NSSAI and subscribed S-NSSAI of the terminal, allowed S-NSSAI of the visited PLMN, wherein the visited PLMN S-NSSAI is mapped from the home PLMN S-NSSAI, and wherein the allowed 5-NSSAI indicates a network slice of the visited PLMN that the terminal is allowed to access; and
send a registration response to the terminal, wherein the registration response includes the allowed S-NSSAI.