A.68 Monitoring of GTP data packets and volume on N9 interface

28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS

In 5GC, the user plane data traffic is transmitted on N9 interface between PSA UPF and I-UPF. The data volume of GTP data packets on N9 interface is helpful for operators to understand the traffic distribution of the 5GC, and evaluate and optimize the bandwidth of the N9 interface. The number of GTP packets on the N9 interface is relevant to the packets processing that may result in larger or smaller packet delay on the interface.

Therefore, the data volume and number of GTP data packets on the N9 interface need to be monitored.

To support the resource allocation and optimization on N9 interface for the network slicing, the data volume and GTP data packets need to be monitored for each S-NSSAI.