5.20c Provisioning of traffic characteristics and monitoring of performance characteristics for a group

NEF provisioning capability as defined in clause 5.20 allows an AF to perform provisioning of traffic characteristics and monitoring of performance characteristics for a UE or group of UEs as specified in clause 4.15.6.14 of TS 23.502 [3] and clause 6.1.3.28 of TS 23.503 [45].

NOTE : The AF may use application layer functionalities to handle requests for UE-to-UE traffic as defined by SA WG6.

The NEF determines whether or not to invoke the TSCTSF in the same way as for AF session with required QoS procedure, as described in step 2 of clause 4.15.6.6 in TS 23.502 [3]. In the case that the TSCTSF is used, the TSCTSF receives the AF requested QoS information from the NEF and handles it as described in clause 4.15.6.14 of TS 23.502 [3]. In the case that TSCTSF is not used, the AF request is handled as described in clause 4.15.6.14 of TS 23.502 [3] and clause 6.1.3.28 of TS 23.503 [45].

When the TSCTSF receives the AF requested QoS information from NEF or the PCF(s) receive the AF requested QoS information from UDR, the TSCTSF or PCF (s) manage the AF requested QoS information for each UE group member within the group as follows:

• TSCTSF translates the GPSI or External/Internal Group ID into a list of SUPIs by invoking Nudm_SDM_Get service.
• Determine which of these UE group members have active PDU Sessions matching the DNN and S-NSSAI and determine the relevant UE address.
• Manage the request status (activated, de-activated, failed) for each UE group member within the group:
• Apply the AF requested QoS information if the UE group member is registered or has active PDU Session matching the DNN and S-NSSAI. Set the status to activated if the QoS resources are assigned for the UE group member, otherwise, failed.
• Set the status to de-activated if the UE group member is not registered or has no active PDU Session matching the DNN and S-NSSAI.
• Delete the request status for the UE group member if the UE group member is removed from the group and further revokes AF request QoS information if the request status is activated.
• Check whether to apply the AF requested QoS information and update the request status for the UE group member if the UE group member is newly added to the group.
• When the AF requested QoS information contains temporal invalidity condition as described in clause 6.1.3.28 of TS 23.503 [45]:
• Revoke AF requested QoS information for each UE group member which is marked as active, so to e.g. to remove or modify PCC rules as defined in clause 4.16.5.2 of TS 23.502 [3] if the start-time is reached.
• Apply AF requested QoS information for each UE group member that has active PDU Sessions matching the DNN and S-NSSAI, e.g. to add or modify PCC rules as defined in clause 4.16.5.2 of TS 23.502 [3] if the end-time is reached.