Methods and systems for handling network slice admission control for UE

A method of a network slice admission control function (NSACF) in a communication system, the method comprising:

• receiving, from an access and mobility management function (AMF), a request related to a network slice admission control to check a number of UEs per a network slice based on the AMF receiving a registration request from a user equipment (UE),
• wherein the request related to the network slice admission control includes an identity of the AMF, an identity of the UE, and at least one single-network slice selection assistance information (S-NSSAI);
• and
• managing a number of UEs for the at least one S-NSSAI based on receiving the request related to the network slice admission control.

An apparatus for an access and mobility management function (AMF) in a communication system, the apparatus comprising:

• a memory;
• and
• at least one processor coupled to the memory,
• wherein the at least one processor is configured to:
• receive, from a user equipment (UE), a registration request, and
• perform a procedure for checking a number of UEs per a network slice based on receiving the registration request by sending a request related to a network slice admission control to a network slice admission control function (NSACF), and
• wherein the request related to the network slice admission control includes an identity of the AMF, an identity of the UE, and at least one single-network slice selection assistance information (S-NSSAI).

An apparatus for a network slice admission control function (NSACF) in a communication system, the apparatus comprising:

• a memory;
• and
• at least one processor coupled to the memory,
• wherein the at least one processor is configured to:
• receive, from an access and mobility management function (AMF), a request related to a network slice admission control to check a number of UEs per a network slice based on the AMF receiving a registration request from a user equipment (UE), wherein the request related to the network slice admission control includes an identity of the AMF, an identity of the UE, and at least one single-network slice selection assistance information (S-NSSAI), and
• manage a number of UEs for the at least one S-NSSAI based on receiving the request related to the network slice admission control.