Section: 5.2.21.2 Nnsacf_NSAC services 5.2.21.2.1 General
Content: Service Description: The Nnsacf_NSAC services control the number of UEs registered with a network slice and the number of PDU Sessions associated with a network slice for the network slices subject to NSAC. The consumer NF (e.g. AMF) can request the NSACF to check whether the number of UEs registered with a network slice has reached the maximum number of UEs per network slice and the consumer NF can also request the NSACF to update the number of UEs registered with a network slice. The SMF can request the NSACF to check whether the number of PDU Sessions established on a network slice has reached the maximum number of PDU Sessions per network slice and the SMF can also request the NSACF to update the number of PDU Sessions established on a network slice. While roaming, for a centralized NSAC architecture and/or a Hierarchical NSAC architecture, the VPLMN Primary (or Central) NSACF can fetch the local maximum number of Registered UEs and/or number of LBO PDU sessions.