Content for  TS 23.288  Word version:  18.4.0

This clause describes the Redundant Transmission Experience related analytics. These analytics may be used as follows:

• by the SMF to determine whether redundant transmission on N3/N9 interfaces (see clause 5.33.2.2 of TS 23.501) shall be performed, or (if it had been activated) shall be stopped;
• by the PCF for the calculation of the Route Selection Components in a URSP Rule for redundant PDU Sessions as described in clause 5.33.2.1 of TS 23.501.

The service consumer may be a NF (e.g. SMF, PCF). The consumer of these analytics may indicate in the request:

• Analytics ID = "Redundant Transmission Experience".
• Target of Analytics Reporting: a single UE (SUPI), any UE, or a group of UEs (an Internal Group ID).
• Analytics Filter Information optionally containing:
  • Area of Interest;
  • S-NSSAI;
  • DNN;
  • optional list of analytics subsets that are requested (i.e. UL/DL packet drop rate GTP-U, UL/DL packet delay GTP-U, see clause 6.13.3).
• An Analytics target period indicates the time period over which the statistics or predictions are requested.
• Optionally, Temporal granularity size;
• Preferred level of accuracy of the analytics;
• Preferred order of results for the list of Redundant Transmission Experience:
  • ordering criterion: "time slot start"; and
  • order: ascending or descending;
• In a subscription, the Notification Correlation Id and the Notification Target Address are included.

The NWDAF supporting data analytics on Redundant Transmission Experience shall be able to collect UE mobility information from OAM, MDAS/MDAF, 5GC and AFs and service data from AF, as described in clause 6.7.2.2. In addition, NWDAF shall be able to collect the information for PDU session which is established with redundant transmission from the SMF. UE mobility information is specified in Table 6.7.2.2-1 and service data from AF related to UE mobility in Table 6.7.2.2-2. In addition, the NWDAF shall be able to collect performance measurements on user data congestion as specified in Table 6.8.2-1 for user data congestion analytics. Additionally, the NWDAF collects the following input (see Table 6.13.2-1 and Table 6.13.2-2) according to existing measurements defined in clause 5.33.3 QoS Monitoring to Assist URLLC Service of TS 23.501. The NWDAF also collects the input from MDAS/MDAF of the end to end latency analysis in Table 6.13.2-3, as defined in clause 8.4.2.4.3 of TS 28.104.

The NWDAF supporting data analytics on Redundant Transmission Experience shall be able to provide Redundant Transmission Experience analytics as defined in Table 6.13.3-1 and Table 6.13.3-2.