Method and apparatus for selecting an access and mobility management function in a mobile communication system

A method performed by a terminal in a wireless communication system, the method comprising:

• transmitting, to an access network entity in the wireless communication system, a first message including first information for indicating a first access and mobility management function (AMF) and a registration request message, the first information including an AMF set identifier and an AMF identifier;
• and
• receiving, from the access network entity, a second message as a response to the registration request message,
• wherein the AMF set includes a plurality of AMFs based on network slices supported by each of the AMFs, and
• wherein the AMF set identifier is used for selection of the AMF set.

An access network entity in a wireless communication system, the access network entity comprising:

• a transceiver;
• and
• a controller configured to:
• receive, from a terminal in the wireless communication system via the transceiver, a first message including first information for identifying an access and mobility management function (AMF) and a registration request message, the first information including an AMF set identifier and an AMF identifier,
• select an AMF set based on the AMF set identifier,
• select an AMF from the selected AMF set, and
• transmit, to the terminal, via the transceiver, a second message as a response to the registration request message,
• wherein the AMF set includes a plurality of AMFs based on network slices supported by each of the AMFs.

A terminal in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• a controller configured to:
• transmit, toward an access network entity, via the transceiver, a first message including first information for indicating a first access and mobility management function (AMF) and a registration request message, the first information including an AMF set identifier and an AMF identifier, and
• receive, from the access network entity, via the transceiver, a second message as a response to the registration request message,
• wherein the AMF set includes a plurality of AMFs based on network slices supported by each of the AMFs, and
• wherein the AMF set identifier is used for selection of the AMF set.