4 General Description

29.3373GPPDiameter-based T4 Interface for communications with packet data networks and applicationsRelease 17TS

The T4 reference point between the MTC-IWF and the SMS-SC is an intra PLMN interface, as defined in the 3GPP TS 23.682 [7].

This document describes the T4 interface related procedures, message parameters and protocol specifications.

The T4 interface allows transfer of device trigger from MTC-IWF to SMS-SC inside HPLMN domain, along with the serving SGSN/MME/MSC/SMSF identities, and allows SMS-SC to report to MTC-IWF the submission outcome of a device trigger and the success or failure of delivering the device trigger to the UE.