A.61 Monitoring of one way delay between PSA UPF and NG-RAN

28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS

The DL and UL one way delay has direct impact to users’ experience for some types of services (e.g., URLLC). The one way delay between PSA UPF and NG-RAN is part of the end to end one-way delay and is not expected very long comparing to the delay in between NG-RAN and UE.

In case the PSA UPF and NG-RAN are time synchronised, the UL one way delay can be measured by PSA UPF and the DL one way delay can be measured by NG-RAN.

The measurements on the one way DL and UL delay between PSA UPF and NG-RAN can be used to evaluate and optimize the DL and UL user plane delay performance between 5GC and NG-RAN.