Content for  TS 23.288  Word version:  18.4.0

In order to support some optimized operations, e.g. customized mobility management, traffic routing handling, RFSP Index Management, QoS improvement or Inactivity Timer optimization, in 5GS, an NWDAF may perform data analytics on UE communication pattern and user plane traffic and provide the analytics results (i.e. UE communication statistics or prediction) to NFs in the 5GC or an AF. An NWDAF supporting UE Communication Analytics collects per-application communication description from AFs. If consumer NF provides an Application ID, the NWDAF only considers the data from AF, SMF and UPF that corresponds to this application ID. NWDAF may also collect data from AMF. The consumer of these analytics may indicate in the request:

• Analytics ID = "UE Communication".
• Target of Analytics Reporting: a single UE (SUPI) or a group of UEs (an Internal Group ID).
• Analytics Filter Information optionally including:
  • S-NSSAI;
  • DNN;
  • Application ID;
  • Area of Interest.
  • an optional list of analytics subsets that are requested (see clause 6.7.3.3);
• An Analytics target period indicates the time period over which the statistics or predictions are requested.
• Preferred level of accuracy of the analytics.
• Optional Preferred level of accuracy per analytics subset (see clause 6.7.3.3);
• Optional preferred order of results for the list of UE Communications:
  • ordering criterion: "start time" or "duration",
  • order: ascending or descending;
• Optionally, maximum number of objects;
• Optionally, Spatial granularity size (if an Area of Interest is provided); and
• In a subscription, the Notification Correlation Id and the Notification Target Address are included.

The NWDAF supporting data analytics on UE communication shall be able to collect communication information for the UE from 5GC. The detailed information collected by the NWDAF includes service data related to UE communication as defined in the Table 6.7.3.2-1.

Depending on the requested level of accuracy, data collection may be provided on samples (e.g. spatial subsets of UEs or UE group, temporal subsets of UE communication information). The application Id is optional. If the application Id is omitted, the collected UE communication information can be applicable to all the applications for the UE.

The NWDAF supporting UE Communication Analytics provides the analytics results to consumer NFs. The analytics results provided by the NWDAF include the UE communication statistics as defined in Table 6.7.3.3-1 or predictions as defined in Table 6.7.3.3-2.

The results for UE groups address the group globally. The ratio is the proportion of UEs in the group for a given communication at a given time and duration. The number of UE communication entries (1..max) is limited by the maximum number of objects provided as part of Analytics Reporting Information. The communications shall be provided by order of time, possibly overlapping. Depending on the list size limitation, the least probable communications on a given Analytics target period may not be provided.

The NWDAF can provide UE communication related analytics, in the form of statistics or predictions or both, to a 5GC NF.