5.37.8.3 End of Data Burst Indication

An indication of End of Data Burst may be provided to the NG-RAN by the PSA UPF, e.g. to configure UE power management schemes like connected mode DRX.

Based on the End of Data Burst Marking Indication in a PCC rule and/or on local operator policies, SMF should request the PSA UPF to detect the last PDU of the data burst and mark the End of Data Burst in the GTP-U header of the last PDU in downlink. The SMF may provide the PSA UPF the End of Data Burst Marking Indication and Protocol Description used by the service data flow. The Protocol Description may be received in the PCC rule, based on information provided by the AF or by PCF local policies as described in clause 5.37.5.1.

According to the request and information from the SMF, the UPF identifies the last PDU of a Data burst in the DL traffic using the DL Protocol Description and the received transport protocol headers as defined in TS 26.522 [179] or using implementation specific means and provides an End of Data Burst indication to the NG-RAN in GTP-U header of the last PDU of the Data burst.

For end-to-end encrypted traffic, the End of Data Burst Indication is received as media related information from the Application Server, see clause 5.37.9.

NOTE: There can be some packets from the Data Burst received by NG-RAN after the PDU with End of Data Burst Indication if packets are received out of sequence.