A.67 Monitoring of distribution of integrated delay in NG-RAN

28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS

The integrated DL/UL packet delay in NG-RAN, i.e., the delay between NG-RAN and UE (including the delay at gNB-CU-UP, on F1-U and on gNB-DU for split scenario and the delay over Uu interface) is one significant part of the e2e delay that has direct impact to users’ experience for some types of services (e.g., URLLC).

Besides the average integrated delay in NG-RAN which can reflect whether or not the users experience can be met on average, it is very useful for operator to know how many (percents of) data packets are with satfistfied delay perfomance, and how many are not with satisfied performance and how far they are from the satisfied performance. Therefore, the distribution of integrated delay in NG-RAN needs to be monitored.

As each S-NSSAI or 5QI has different requirements on the delay, so the distribution of integrated delay in NG-RAN needs to be monitored per S-NSSAI and per 5QI.

For multi-operator RAN sharing scenario, different operators may have different S-NSSAI or 5QI requirements on the packet delay, so the distribution of integrated delay in NG-RAN per S-NSSAI and per 5QI for each PLMN needs to be monitored, too.