A.14 PDU session establishment related measurements

28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS

The PDU session establishment is one of essential procedures for 5G network. The performance of PDU session establishment directly impacts the QoS of the network and the QoE of the end users. Therefore, the performance measurements are needed to reflect the performance of the PDU session establishment.

The PDU sessions are created in two scerarios; Non-roaming/LBO-roaming and HR-roaming, and are created by (V-)SMF and H-SMF respectively.

On receipt by the (V-)SMF from AMF of Nsmf_PDUSession_CreateSMContex Request, the PDU session is created in non-roaming/LBO-roaming scenario and HR-roaming scenario.

On receipt by the H-SMF from V-SMF of Nsmf_PDUSession_Create Request, the PDU session is created in HR-roaming scenario.

The number and success rate of PDU session creations, the number of PDU sessions running on the SMF are some of the basic performance measurements to monitor the performance of the PDU session establishment. And the performance measurements of failed PDU session creations are helpful to solve the network issues in case the performance is below the expectation.