A.13 Use case for integrated downlink latency in RAN

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

Following figure captured in clause 4.2.3, 3GPP TS 23.501[x] illustrates the 5G system architecture. The end to end downlink latency should be measured from Data Network to UE, of which the latency from RAN to UE is an important part for the latency of this section is closely related to NG-RAN.

The integrated downlink latency in RAN is a key performance parameter for evaluating the packet delay in RAN for QoS monitoring. This KPI is also an important part of the end-to-end network latency for SLA assurance.