Section: 5.2.21.4.4 Nnsacf_SliceEventExposure_Notify service operation
Content: Service operation name: Nnsacf_SliceEventExposure_Notify Description: This service operation is used by the NSACF to report the current number of UEs registered with a network slice or the current number of PDU Sessions established on a network slice in numbers or in percentage from the maximum allowed numbers, based on threshold or at expiry of periodic timer. Inputs, Required: Event ID, Event Filter, Event Reporting information, Notification Correlation Information. The Event ID parameter defines the type of the reported information, i.e. the number of UEs registered with a network slice or the number of PDUs Sessions established on a network slice. The Event Filter parameter is the S-NSSAI for which the Notification applies. The Event Reporting information parameter provides the network slice status information in terms of the current number of UEs registered with a network slice or the current number of PDU Sessions established on a network slice. If the Notification is threshold based where the threshold is a certain number of UEs registered with a network slice or PDU Sessions established on a network slice or the threshold is a percentage of the maximum number of UEs registered with a network slice or the maximum number of PDU Sessions established on a network slice, the Event Reporting information parameter contains confirmation for reaching this threshold value. If the Notification is periodical, the Event Reporting information parameter provides information for the current number of UEs registered with a network slice (e.g. represented in percentage of the maximum number of the UEs registered with the network slice) or information for the current number of PDU Sessions established on a network slice (e.g. represented in percentage of the maximum number of the PDU Sessions established on the network slice) with periodicity provided during the subscription. For current number of UEs registered with a network slice, the network slice status information may include information to indicate whether this is number of UE with at least one PDU Session/PDN Connection. Outputs, Required: None.