5.31.4.2 Establishment of N3 data transfer during Data Transport in Control Plane CIoT 5GS Optimisation

If UE and AMF have successfully negotiated N3 data transfer in addition to Control Plane CIoT 5GS Optimisation based on the Preferred and Supported Network Behaviour as defined in clause 5.31.2, then the SMF may decide to establish N3 data transfer for any PDU session for which Control Plane Only Indicator was not included based on local SMF decision e.g. based on the amount of data transferred in UL or DL using Control Plane CIoT 5GS Optimisation. In that case, the SMF initiates the SMF-triggered N3 data transfer establishment procedure as described in clause 4.2.10.2 of TS 23.502 [3].

If UE and AMF successfully negotiate N3 data transfer in addition to Control Plane CIoT 5GS Optimisation based on the Preferred and Supported Network Behaviour as defined in clause 5.31.2, then the UE may decide to establish N3 data transfer for any PDU session for which Control Plane Only Indicator was not included based on local decision, e.g. based on the amount of data to be transferred. In that case, the UE performs the UE triggered N3 data transfer establishment procedure as described in clause 4.2.10.1 of TS 23.502 [3].