A.1 Use case for end-to-end latency measurements of 5G network-related KPI

28.5543GPP5G end to end Key Performance Indicators (KPI)Management and orchestrationRelease 18TS

The end-to-end latency is an important performance parameter for operating 5G network. In some scenarios (e.g. uRLLC), if end-to-end latency is insufficient, the 5G network customer cannot obtain guaranteed network performance provided by the network operator. So it is necessary to define end-to-end latency of network related measurement to evaluate whether the end-to-end latency that network customer requested has been satisfied. A procedure is invoked by network management system and is used:

– to update the CSMF/NSMF with the end-to-end latency parameter for monitoring;

– to inform the network customer/network operator the end-to-end latency;

– to make CSMF/NSMF aware if the end-to-end latency can meet network customer’s service requirement.

If high end-to-end latency are measured, it is also of benefit to pinpoint where in the chain from application to UE that the latency occurs.