Systems and methods for supporting network slice admission control based on subscription and policy control

1 . A method, comprising:

generating, by a first network device of a network, a first request for an indication of whether a user equipment is subject to network slice admission control;

providing, by the first network device and to a second network device, the first request for the indication, wherein the second network device includes a policy control function (PCF);

receiving, by the first network device, from the second network device and based on the first request, the indication of whether the user equipment is subject to network slice admission control;

generating, by the first network device, a second request for network slice admission control information based on the indication indicating that the user equipment is subject to network slice admission control; and

providing, by the first network device, the second request for the network slice admission control information to a third network device.

2 . The method of claim 1 , further comprising: receiving the network slice admission control information from the third network device based on the second request;

determining a policy for the user equipment based on the network slice admission control information; and

causing the policy to be implemented for the user equipment.

3 . The method of claim 2 , wherein determining the policy for the user equipment based on the network slice admission control information comprises:

accepting or denying a registration request of the user equipment based on the network slice admission control information.

4 . The method of claim 2 , wherein determining the policy for the user equipment based on the network slice admission control information comprises:

accepting or denying a protocol data unit session, associated with the user equipment, based on the network slice admission control information.

5 . The method of claim 2 , wherein causing the policy to be implemented for the user equipment comprises:

accepting or denying a registration request of the user equipment.

6 . The method of claim 2 , wherein causing the policy to be implemented for the user equipment comprises:

accepting or denying a protocol data unit session associated with the user equipment.

7 . The method of claim 1 , wherein the first network device includes an access and mobility management function (AMF), and the third network device includes a network slice admission control function (NSACF).

8 . A first network device of a network, comprising:

one or more processors configured to:

generate a first request for an indication of whether a user equipment is subject to network slice admission control;

provide the first request for the indication to a second network device, wherein the second network device includes a policy control function (PCF);

receive, from the second network device based on the first request, the indication of whether the user equipment is subject to network slice admission control;

generate a second request for network slice admission control information based on the indication indicating that the user equipment is subject to network slice admission control;

provide the second request for the network slice admission control information to a third network device;

receive the network slice admission control information from the third network device based on the second request;

determine a policy for the user equipment based on the network slice admission control information; and

cause the policy to be implemented for the user equipment.

9 . The first network device of claim 8 , wherein the first network device includes an access and mobility management function (AMF), the and the third network device includes a network slice admission control function (NSACF).

10 . The first network device of claim 8 , wherein the first network device includes a session management function (SMF), and the third network device includes a network slice admission control function (NSACF).

11 . The first network device of claim 8 , wherein the one or more processors, to generate the first request for the indication of whether the user equipment is subject to network slice admission control, are configured to:

generate the first request for the indication of whether a protocol data unit session, associated with the user equipment, is subject to network slice admission control.

12 . The first network device of claim 8 , wherein the indication of whether the user equipment is subject to network slice admission control is based on one of a subscription associated with the user equipment or policy control information associated with the user equipment.

13 . The first network device of claim 8 , wherein the one or more processors are further configured to:

receive a registration request from the user equipment; and

perform a registration procedure for the user equipment based on the registration request.

14 . The first network device of claim 8 , wherein the one or more processors are further configured to:

receive a registration request from the user equipment; and

authenticate the user equipment based on the registration request.

15 . A non-transitory computer-readable medium storing a set of instructions, the set of instructions comprising:

one or more instructions that, when executed by one or more processors of a first network device of a network, cause the first network device to:

generate a first request for an indication of whether a user equipment is subject to network slice admission control;

provide the first request for the indication to a second network device, wherein the second network device is a policy control function (PCF);

receive, from the second network device and based on the first request, the indication of whether the user equipment is subject to network slice admission control;

generate a second request for network slice admission control information based on the indication indicating that the user equipment is subject to network slice admission control;

provide the second request for the network slice admission control information to a third network device;

receive the network slice admission control information from the third network device based on the second request; and

determine a policy for the user equipment based on the network slice admission control information.

16 . The non-transitory computer-readable medium of claim 15 , wherein the one or more instructions, that cause the first network device to determine the policy for the user equipment based on the network slice admission control information, cause the first network device to:

accept or deny a registration request of the user equipment based on the network slice admission control information.

17 . The non-transitory computer-readable medium of claim 15 , wherein the one or more instructions, that cause the first network device to determine the policy for the user equipment based on the network slice admission control information, cause the first network device to:

accept or deny a protocol data unit session, associated with the user equipment, based on the network slice admission control information.

18 . The non-transitory computer-readable medium of claim 15 , wherein the one or more instructions, that cause the first network device to generate the first request for the indication of whether the user equipment is subject to network slice admission control, cause the first network device to:

generate the first request for the indication of whether a protocol data unit session, associated with the user equipment, is subject to network slice admission control.

19 . The non-transitory computer-readable medium of claim 15 , wherein the indication of whether the user equipment is subject to network slice admission control is based on one of a subscription associated with the user equipment or policy control information associated with the user equipment.

20 . The non-transitory computer-readable medium of claim 15 , wherein the one or more instructions further cause the first network device to:

receive a registration request from the user equipment;

perform a registration procedure for the user equipment based on the registration request; and

authenticate the user equipment based on the registration request.