Techniques to facilitate network slice service continuity for mobile network environments

One or more non-transitory computer readable storage media encoded with instructions that, when executed by a processor, cause the processor to perform operations, comprising:

• receiving a registration request from a first user equipment (UE) and obtaining, by an Access and Mobility Management Function (AMF), subscription information for the first UE identifying that a slice continuity service is enabled for the UE for one or more primary network slices and one or more backup network slices to which the first UE is subscribed, wherein each primary network slice of the one or more primary network slices is associated with a corresponding backup network slice of the one or more backup network slices that provide a same network service and each of the one or more primary network slices and the one or more backup network slices are active network slices capable of actively handling sessions for a plurality of user equipment;
• obtaining, by the AMF from a Network Slice Selection Function (NSSF) following a query to the NSSF by the AME, registration information for the first UE identifying, based at least in part on a location of the UE and the subscription information, a first primary network slice of the one or more primary network slices and a first backup network slice of the one or more backup network slices with which the first UE is allowed registration;
• determining, by the AMF based on an indication obtained from a Network Slice Admission Control Function (NSACF) following a query to the NSACF by the AMF, whether there is registration capacity for registration of the first UE with the first primary network slice and the first backup network slice, wherein the query subscribes the AMF to receive notifications from the NSACF indicating if a capacity threshold is met for the first primary network slice or the first backup network slice;
• and
• based on the determining that there is registration capacity for registration of the first UE with the first primary network slice and the first backup network slice, transmitting a registration response to the first UE that indicates that registration with the first primary network slice and the first backup network slice is accepted.

A system comprising:

• at least one memory element for storing data;
• and
• at least one processor for executing instructions associated with the data, wherein executing the instructions causes the system to perform operations, comprising:
• receiving a registration request from a first user equipment (UE) and obtaining, by an Access and Mobility Management Function (AMF), subscription information for the first UE identifying that a slice continuity service is enabled for the UE for one or more primary network slices and one or more backup network slices to which the first UE is subscribed, wherein each primary network slice of the one or more primary network slices is associated with a corresponding backup network slice of the one or more backup network slices that provide a same network service and each of the one or more primary network slices and the one or more backup network slices are active network slices capable of actively handling sessions for a plurality of user equipment;
• obtaining, by the AMF from a Network Slice Selection Function (NSSF) following a query to the NSSF by the AME, registration information for the first UE identifying, based at least in part on a location of the UE and the subscription information, a first primary network slice of the one or more primary network slices and a first backup network slice of the one or more backup network slices with which the first UE is allowed registration;
• determining, by the AMF based on an indication obtained from a Network Slice Admission Control Function (NSACF) following a query to the NSACF by the AMF, whether there is registration capacity for registration of the first UE with the first primary network slice and the first backup network slice, wherein the query subscribes the AMF to receive notifications from the NSACF indicating if a capacity threshold is met for the first primary network slice or the first backup network slice;
• and
• based on the determining that there is registration capacity for registration of the first UE with the first primary network slice and the first backup network slice, transmitting a registration response to the first UE that indicates that registration with the first primary network slice and the first backup network slice is accepted.