Patent ID: 11937170
Assignee: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A non-transitory computer-readable storage medium comprising instructions executable by a processing resource of a unified data management (UDM) node implementing a UDM network function in a communications network, to:
receive, from a session management function (SMF) node, a session registration request for accessing a first network slice of a communications network to which a user equipment (UE) seeks access;
determine that a network slice access-control function is applied on the UE;
in response to determining that the network slice access-control function is applied on the UE, determine whether the UE has an active session registration for a second network slice in the communications network; and
in response to determining that the UE has the active session registration for the second network slice, determine whether the session registration request for accessing the first network slice is allowed based on a combination of a first network slice access-control policy and a second network slice access-control policy, wherein the first network slice access-control policy specifies restricted network slices corresponding to one or more network slices, wherein the second network slice access-control policy specifies different primary network slices for different time periods, and wherein determining whether the session registration request for accessing the first network slice is allowed comprises:
in response to determining that the first network slice and the second network slice are mutually exclusive based on the first network slice access-control policy, determining, by the UDM node, whether the first network slice is a primary network slice based on the second network slice access-control policy and an instant time;
in response to determining that the first network slice is the primary network slice, determining that the session registration request is allowed; and
in response to determining that the first network slice is not the primary network slice, determining that the session registration request is not allowed.