Systems and methods for subscriber level admission control and preemption in a network slice
Systems and methods described herein employ an allocation and retention priority for user equipment (UE), referred to as a UE ARP. The UE ARP may be defined per network slice, such that a subscriber can have different priority in different slices. According to one implementation, a network device receives, from a UE device, a registration request requesting access to a network slice and obtains a UE ARP. The UE ARP associates the UE device with a priority level on the network slice. When the network device determines that a maximum number of terminals are using the network slice, it applies the priority level in the UE ARP to grant or deny the UE device access to the network slice.
1. A method, comprising:
receiving, by a network device and from a user equipment (UE) device, a registration request requesting access to a network slice;
obtaining, by the network device and from stored subscriber data for the UE device, a UE allocation and retention priority (UE ARP) for the network slice, wherein the subscriber data indicates different priority levels of the UE device for different network slices, and wherein the UE ARP associates the UE device with a priority level on the network slice;
determining, by the network device, that a maximum number of other UE devices are using the network slice; and
applying, by the network device, the priority level in the UE ARP to grant or deny the UE device access to the network slice.
2. The method of claim 1 , wherein the UE ARP further includes a preemption capability setting and a preemption vulnerability setting for the UE device on the network slice.
3. The method of claim 1 , wherein applying the priority level further comprises:
determining, from the UE ARP, that a preemption capability is enabled for the UE device,
determining that a preemption vulnerability is enabled for a different UE device on the network slice, wherein the different UE device has a lower priority for the network slice,
granting the registration request for the UE device, and
deregistering the different UE device from the network slice.
4. The method of claim 1 , wherein applying the priority level further comprises:
denying the registration request for the UE device when:
a preemption capability is not enabled for the UE device, based on the UE ARP, or
no other UE devices on the network slice has a lower priority and a preemption vulnerability enabled.
5. The method of claim 1 , wherein the obtaining includes:
receiving the UE ARP from a Unified Data Management (UDM) function of a core network.
6. The method of claim 1 , wherein the obtaining includes:
receiving the UE ARP from a Policy Control Function (PCF) of a core network.
7. The method of claim 1 , wherein the obtaining includes:
receiving the UE ARP as part of a subscription profile for the UE.
8. The method of claim 1 , wherein the network device includes one of:
an Access and Mobility Management Function (AMF), and
an access node for a radio access network.
9. The method of claim 1 , further comprising:
storing the UE ARP in a Unified Data Repository (UDR);
receiving an update to a subscription profile, wherein the update includes a change to the UE ARP, and
notifying the network device of the update to the subscription profile.
10. A network device, comprising:
a processor configured to:
receive, from a user equipment (UE) device, a registration request requesting access to a network slice;
obtain, from stored subscriber data for the UE device, a UE allocation and retention priority (UE ARP) for the network slice wherein the subscriber data indicates different priority levels of the UE device for different network slices, and wherein the UE ARP associates the UE device with a priority level on the network slice;
determine that a maximum number of other UE devices are using the network slice; and
apply the priority level in the UE ARP to grant or deny the UE device access to the network slice.
11. The network device of claim 10 , wherein the UE ARP further includes a preemption capability setting and a preemption vulnerability setting for the UE device on the network slice.
12. The network device of claim 10 , wherein, when applying the priority level, the processor is further configured to:
determine, from the UE ARP, that a preemption capability is enabled for the UE device,
determine that a preemption vulnerability is enabled for a different UE device on the network slice, wherein the different UE device has a lower priority for the network slice,
grant the registration request for the UE device, and
deregister the different UE device from the network slice.
13. The network device of claim 10 , wherein, when obtaining the UE ARP, the processor is further configured to:
receive the UE ARP from a Unified Data Management (UDM) function as part of a registration or authentication process for the UE.
14. The network device of claim 10 , wherein the network device includes an Access and Mobility Management Function (AMF).
15. The network device of claim 10 , wherein the processor is further configured to:
receive, from a Unified Data Management (UDM) function and after granting the UE device access, an update to a subscription profile for the UE, wherein the update includes a change to the UE ARP.
16. A non-transitory computer-readable medium containing instructions executable by at least one processor, the computer-readable medium comprising one or more instructions for:
receiving, from a user equipment (UE) device, a registration request requesting access to a network slice;
obtaining, from stored subscriber data for the UE device, a UE allocation and retention priority (UE ARP) for the network slice, wherein the subscriber data indicates different priority levels of the UE device for different network slices, and wherein the UE ARP associates the UE device with a priority level on the network slice;
determining that a maximum number of other UE devices are using the network slice; and
applying the priority level in the UE ARP to grant or deny the UE device access to the network slice.
17. The non-transitory computer-readable medium of claim 16 , further comprising one or more instructions for
determining, from the UE ARP, that a preemption capability is enabled for the UE device, and
granting, based on the preemption capability, the registration request for the UE device.
18. The non-transitory computer-readable medium of claim 17 , further comprising one or more instructions for:
determining that a preemption vulnerability is enabled for a different UE device on the network slice, wherein the different UE device has a lower priority for the network slice, and
deregistering, based on the preemption vulnerability, the different UE device from the network slice.
19. The non-transitory computer-readable medium of claim 16 , wherein the instructions to obtain the UE ARP further comprise one or more instructions for:
receiving the UE ARP from a Unified Data Management (UDM) function, or
receiving the UE ARP from a Policy Control Function (PCF).
20. The non-transitory computer-readable medium of claim 16 , further comprising one or more instructions for
receiving, from a Unified Data Management (UDM) function and after granting the UE device access, an update to a subscription profile for the UE, wherein the update includes a change to the UE ARP.