CPC H04L 67/146 (2013.01) [H04W 36/00 (2013.01); H04W 36/0022 (2013.01); H04W 60/04 (2013.01); H04W 84/042 (2013.01)] | 26 Claims |
1. A method, comprising:
sending, by a home control plane function entity 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;
receiving, by an access and mobility management function in a fifth generation (5G) network from the terminal, a registration request comprising the home PLMN S-NSSAI;
obtaining, by the access and mobility management function based on visited PLMN S-NSSAI and subscribed S-NSSAI of the terminal, allowed S-NSSAI of a visited PLMN, wherein the visited PLMN S-NSSAI is mapped from the home PLMN S-NSSAI, and wherein the allowed S-NSSAI indicates a network slice of the visited PLMN that the terminal is allowed to access; and
sending, by the access and mobility management function, a registration response to the terminal, wherein the registration response includes the allowed S-NSSAI.
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