Section: 4.15.13.6.2 Member UE Selection assistance with end-to-end data volume transfer time related filtering criteria
Content: Figure 4.15.13.6.2-1: Assistance to member UE selection for end-to-end data volume transfer time related filtering criteria 1. AF subscribes to the member UE selection assistance functionality by invoking Nnef_MemberUESelectionAssistance_subscribe request including the Application ID, DNN/S NSSAI, AoI, and the end-to-end data volume transfer time related filtering criteria including the average end-to-end data volume transfer time and/or the variance of the transfer time. 2. NEF verifies the authorization of the AF Request and identifies which information needs to be collected and executed based on the end-to-end data volume transfer time related filtering criteria provided by the AF. 3. S-NSSAI/DNN are not included in the request from the AF, the NEF derives the S-NSSAI and DNN which this Application has access to. NEF discovers and selects the NWDAF(s) by invoking Nudm_UECM_Get or Nnrf_NFDiscovery_Request including Analytics ID = E2E data volume transfer time, AoI, S-NSSAI, etc. 4. NEF sends an Analytics request/subscribe to NWDAF by invoking Nnwdaf_AnalyticsSubscription_Subscribe / Nnwdaf_AnalyticsInfo_Request including Analytics ID = E2E data volume transfer time, Application ID, DNN, S-NSSAI, AoI, and target UEs based on the initial UE list obtained from the AF. 5. The NWDAF collects data from multiple sources for end-to-end data volume transfer time analytics as specified in clause 6.18.2 of TS 23.288[ Architecture enhancements for 5G System (5GS) to support network data analytics services ]  [50]. 6. The NWDAF provides the required output analytics to the consumer NF as specified in clause 6.18.4 of TS 23.288[ Architecture enhancements for 5G System (5GS) to support network data analytics services ]  [50] by means of either Nnwdaf_AnalyticsInfo_Request response or Nnwdaf_AnalyticsSubscription_Notify, depending on the service used in step 4. 7. Based on the analytics received from the NWDAF, the NEF consolidates results and derives the list(s) of candidate UE(s) that fulfil the filtering criteria requested by the AF. The NEF may use the average end-to-end data volume transfer time of specific volumes of data and/or the variance to derive the list(s) of candidate UEs that meet the requirements from the AF. 8. NEF sends a Nnef_MemberUESelectionAssistance_Notify request to the AF including the list(s) of candidate UE(s) and additional information.