Method and apparatus for network slice access management for a user equipment in a wireless communication system

A method performed by an access and mobility management function (AMF) entity in a wireless communication system, the method comprising:

• transmitting, to a user equipment (UE), temporary slice related information for a first single network slice selection assistance information (S-NSSAI);
• and
• receiving, from the UE, a registration request message including a second S-NSSAI different from the first S-NSSAI,
• wherein the registration request message does not include the first S-NSSAI.

A user equipment (UE) in a wireless communication system, the UE comprising:

• a transceiver, and
• a controller coupled with the transceiver and configured to:
• receive, from an access and mobility management function (AMF) entity, temporary slice related information for a first single network slice selection assistance information (S-NSSAI);
• identify that the first S-NSSAI is available or not available;
• and
• transmit, to the AMF entity, a registration request message including a second S-NSSAI based on the identification,
• wherein the registration request message does not include the first S-NSSAI.

An access and mobility management function (AMF) entity in a wireless communication system, the AMF entity comprising:

• a transceiver, and
• a controller coupled with the transceiver and configured to:
• transmit, to a user equipment (UE), temporary slice related information for a first single network slice selection assistance information (S-NSSAI), and
• receive, from the UE, a registration request message including a second S-NSSAI different from the first S-NSSAI,
• wherein the registration request message does not include the first S-NSSAI.