A.40 Monitoring of incoming/outgoing GTP packet loss on N3

28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS

Keeping track of GTP data packet loss over N3 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. Incoming/outgoing GTP data packet loss measurements can be useful for evaluation, optimization, and performance assurance between gNB and UPF in the core. It is also important for the performance measurement of end-to-end point of view from UE to UPF. Performance degradation can happen any point although the focus is centered more at UE and RAN. When the monitoring incoming/outgoing GTP packet loss on N3 requires specific measurements per GTP tunnel, the monitoring of incoming/outgoing GTP packet loss on N3 can use subcounters per TEID to provide the measurements within a GTP tunnel.