5.1.8 Alert

23.5403GPP5G System: Technical realization of Service Based Short Message ServiceRelease 17Stage 2TS

Figure 5.1.8-1 depicts procedure for alert

Figure 5.1.8-1: Procedure for alert

1 Unsuccessful Mobile Terminated short message transfer (without IP-SM-GW/SMS Router) procedure, as defined in steps 1-10 in Figure 5.1.5-1.

2 UDM receives Namf_EventExposure_Notify or Nudm_UECM_Registration operation from AMF or SMSF indicating that the UE is reachable for SMS delivery.

3-4 The UDM notifies the "UE_MEMORY_AVAILABLE_FOR_SMS" or "UE_REACHABILITY_FOR_SMS" event to the SMS-GMSC/IWMSC accordingly. The UDM updates the corresponding reachability flags and deletes the subscription to UE reachability for SMS event created by the SMS-GMSC.

5 ServiceCentrealert as defined in Operation 13 of Figure 20 in TS 23.040 [2].