CPC H04W 48/18 (2013.01) [H04W 4/70 (2018.02); H04W 8/02 (2013.01); H04W 16/02 (2013.01); H04W 68/02 (2013.01); H04W 76/28 (2018.02); H04W 4/02 (2013.01); H04W 8/065 (2013.01); H04W 60/04 (2013.01)] | 16 Claims |
1. A method performed by an access and mobility management function (AMF) in a wireless communication system, the method comprising:
receiving, from a terminal, a first message for a registration request including requested network slice selection assistance information (NSSAI);
receiving, from a unified data management (UDM), a second message including a subscribed NSSAI for the terminal;
transmitting, to a network slice selection function (NSSF), a third message based on the requested NSSAI and the subscribed NSSAI;
receiving, from the NSSF, a fourth message including allowed NSSAI for the terminal as a response to the third message;
determining, based on the allowed NSSAI, a registration area for the terminal, wherein the allowed NSSAI is available in the registration area; and
transmitting, to the terminal, a fifth message including the allowed NSSAI and the determined registration area for the terminal.
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