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TR 23.791 (SA2)
Study of Enablers for Network Automation for 5G

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Rapporteur:  Mr. Wu, Xiaobo

The aim of this Technical Report is to study and specify how to collect data and how to feedback data analytics to the network functions.

As per §4.1, the following architectural assumptions are applicable for all potential solutions:
  1. The NWDAF (Network Data Analytics Function) as defined in TS 23.503 [4] is used for data collection and data analytics in centralized manner. An NWDAF may be used for analytics for one or more Network Slice.
  2. For instances where certain analytics can be performed by a 5GS NF independently, a NWDAF instance specific to that analytic maybe collocated with the 5GS NF. The data utilized by the 5GS NF as input to analytics in this case should also be made available to allow for the centralized NWDAF deployment option.
  3. 5GS Network Functions and OAM decide how to use the data analytics provided by NWDAF to improve the network performance.
  4. NWDAF utilizes the existing service based interfaces to communicate with other 5GC Network Functions and OAM.
  5. A 5GC NF may expose the result of the data analytics to any consumer NF utilizing a service based interface.
  6. The interactions between NF(s) and the NWDAF take place in the local PLMN (the reporting NF and the NWDAF belong to the same PLMN).
  7. Solutions shall neither assume NWDAF knowledge about NF application logic. The NWDAF may use subscription data but only for statistical purpose.
  8. It is further assumed that NWDAF and NFs cooperate adequately to contribute to consistent policies, analytics output results, and finally decision-making in the PLMN.