4 Concepts and overview

28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS

4.1 Performance indicators

Performance indicators are the performance data aggregated over a group of NFs, such as, for example, average latency along the network slice. The Performance Indicators can be derived from the performance measurements collected at the NFs that belong to the group. The aggregation method is identified in the performance indicator definition

Performance indicators at the network slice subnet level can be derived from the performance measurements collected at the NFs that belong to the network slice subnets or to the constituent network slice subnets. The performance indicators at the network slice subnet level can be made available via the corresponding performance management service for network slice subnet.

The performance indicators at the network slice level, can be derived from the network slice subnet level Performance Indicators collected at the constituent network slice subnets and/or NFs. The network slice level performance indicators can be made available via the corresponding performance management service for network slice.

When providing a communication service to a tenant, the performance indicators can be derived from corresponding performance indicators related to network slice, network slice subnet and NFs and they can be made available via the corresponding performance management service, consumed by a tenant. Tenant(s) may be associated with S-NSSAI or sNSSAIList in which case, the performance indicators are split into subcounters per S-NSSAI for individual tenant.

4.2 Filters and filter naming

4.2.0 General

In case a performance measurement is defined for more than one sub-counter, it is convenient to use Filter to define the performance measurement of interest.

4.2.1 Filters

Performance measurements may be sub-divided by use of applicable filters to form new Performance measurements (or sub counters). Any applicable Filter(s) are identified in each performance measurements definition. Performance measurements may also be defined without any applied Filter.

When no Filter is applied the performance measurement should exclude the Filter extension.

Example of possible Filter values:

– 5QI

– QCI

– SNSSAI, where SNSSAI represents the S-NSSAI

– PLMN, where PLMN represents the PLMN ID

4.2.2 Filter naming

For the Performance measurements that indicate Filters, the resulting Performance measurement name will take the form: Performance measurement_Filter

If combination of Filters is used the name will take the form: Performance measurement_Filter1_Filter2

If no Filter is used the name will take the form: Performance measurement

Example: DRB.PdcpF1DelayDl_Filter, Where Filter is a combination of PLMN and 5QI and SNSSAI.

– Single Filter value applied: DRB.PdcpF1DelayDl_Filter1, where Filter could be any of the possible Filter value defined for the performance measurement:  

– Sub counter name: DRB.PdcpF1DelayDl.5QI

– Multiple (two) Filter values applied: DRB.PdcpF1DelayDl_Filter1_Filter2, where Filter1 and Filter2 could be any of the possible Filter value defined for the performance measurement:  

– Sub counter name: DRB.PdcpF1DelayDl.PLMN.5QI.

– No Filter value applied: Counter name: DRB.PdcpF1DelayDl

For Filters the separator ‘_’ is used to append the filter name(s) to the measurement name. For multiple Filters the order in the resulting name is not important.