A.2 Monitoring of UL and DL packet loss in NG-RAN

28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS

Keeping track of UL and DL packet loss in the NG-RAN is essential, since for certain services packets that are lost along the way through the system may have a noticeable impact on the end user. UL and DL packet loss measurements can be useful for evaluation, optimization and for performance assurance within the integrity area (user plane connection quality). Subcounters per QoS Level as well as per supported S-NSSAI is helpful for operator to pinpoint the reason for high packet loss rate.

UL packet loss is a measure of packets dropped in the UE and the packets lost on the interfaces (air interface and F1-U interface). If parts of the gNB are deployed in a virtualized environment, it is important to measure also the F1-U UL interface packet loss in a separate measurement, to be able to pinpoint the reason for high packet loss.